Electrochemistry for Batteries

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Die Forschungsgruppe "Elektrochemie der Batterien" beschäftigt sich breitgefächert mit der Erforschung neuartiger elektrochemischer Speichersysteme, wie Lithium-Ionen-, Lithium-Luft- und Lithium-Schwefel-Batterien. Darüber hinaus werden weitere zukunftsträchtige Systeme erforscht. Dies sind,- insbesondere auf Natrium und Magnesium basierende Zellsysteme,- sowie Superkondensatoren und Redox-Flow Batterien.

Die zukünftige Speicherung elektrischer Energie wird durch die fortlaufende Nutzung und Integration oft dezentraler regenerativer Energiequellen gekennzeichnet sein. Die Gewinnung von Strom aus Wind und Sonne sowie die verstärkte Nachfrage nach Elektromobilität sind jedoch von Speichern abhängig, die den unterschiedlichen Ansprüchen der Anwendungen angepasst sein müssen. Aus diesem Grund beschäftigt sich die Forschungsgruppe Elektrochemie der Batterien umfassend mit der Verbesserung bereits vorhandener und der Erforschung neuartiger elektrochemischer Speichertechnologien. Unsere internationale Forschergruppe verfügt über ein langjähriges Know-how auf den Gebieten aller Einzelbestandteile der elektrochemischen Zelle, einschließlich der Synthese von Aktivmaterialien, deren Erprobung, Charakterisierung und Analyse. Als Teil der großen Forschungsgemeinschaft am HIU sind wir darüber hinaus in der Lage, den interdisziplinären Wissensaustausch weiter zu intensivieren und die daraus resultierenden Synergieeffekte optimal zu nutzen.


Asenbauer JakobPhD StudentTel: +49 (0731) 50 34115Mail: jakob.asenbauer(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Tugce AtesPhD StudentTel: +49 (0731) 50 34104Mail: tugce.ates(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Adele BirrozziPhD StudentTel: +49 (0731) 50 34115Mail: adele.birrozzi(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Dominic BresserPrincipal InvestigatorTel: +49 (0731) 50 34117Mail: dominic.bresser(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Zhen ChenScientistTel: +49 (0731) 50 34104Mail: chen.zhen(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hyeongseon ChoiPhD StudentTel: +49 (0731) 50 34113Mail: Hyeongseon.Choi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Xu DongPhD StudentTel: +49 (0731) 50 34123Mail: xu.dong(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Tobias EisenmannPhD StudentTel: +49 (0731) 50 34112Mail: tobias.eisenmann(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Giuseppe Antonio EliaScientistTel: +49 (0731) 50 34132Mail: giuseppe.elia(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Jin HanPhD StudentTel: +49 (0731) 50 34103Mail: jin.han(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Seyed Milad HosseiniPhD StudentTel: +49 (0731) 50 34111Mail: milad.hosseini(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Alessandro InnocentiPhD StudentTel: +49 (0731) 50 34111Mail: alessandro.innocenti(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Niyousha KarimiPhD StudentTel: +49 (0731) 50 34116Mail: niyousha.paridari(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Guk-Tae KimScientistTel: +49 (0731) 50 34110Mail: Guk-tae.kim(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Yong Il KimScientistTel: +49 (0731) 50 34110Mail: yongil.kim(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Susanne KraußeSecretary Prof. Stefano PasseriniTel: +49 (0731) 50 34102Mail: susanne.krausse(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Daniel RoscherPhD StudentTel: +49 (0731) 50 34131Mail: daniel.kroetschel(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Matthias KünzelScientistTel: +49 (0731) 50 34114Mail: matthias.kuenzel(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Huihua LiPhD StudentTel: +49 (0731) 50 34120Mail: huihua.li(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Qi LiPhD StudentTel: +49 (0731) 50 34027Mail: qi.li(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Haipeng LiangPhD StudentTel: Mail: hai-peng.liang(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Xu LiuPhD StudentTel: Mail: xu.liu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Alessandro MarianiScientistTel: +49 (0731) 50 34109Mail: alessandro.mariani(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Alexander MayerPhD StudentTel: +49 (0731) 50 34106Mail: alexander.mayer(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hyein MoonPhD StudentTel: Mail: hyein.moon(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Angelo MullaliuScientistTel: +49 (0731) 50 34121Mail: angelo.mullaliu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Florian NägelePhD StudentTel: +49 (0731) 50 34217Mail: florian.naegele(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesIT & Technik Administration
Mayokun Uzezi OlutogunPhD StudentTel: +49 (0731) 50 34114Mail: mayokun.olutogun(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Prof. Dr. Stefano PasseriniPrincipal InvestigatorTel: +49 (0731) 50 34101Mail: stefano.passerini(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Peter RuschhauptPhD StudentTel: +49 (0731) 50 34027Mail: peter.ruschhaupt(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Nikhil SchmelzlePhD StudentTel: +49 (0731) 50 34108Mail: nikhil.schmelzle(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Annika SchürPhD StudentTel: +49 (0731) 50 34127Mail: annika.schuer(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hanno SchützPhD StudentTel: +49 (0731) 50 34122Mail: hanno.schuetz(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Kai ShiPhD StudentTel: +49 (0731) 50 34110Mail: kai.shi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dominik SteinlePhD StudentTel: +49 (0731) 50 34105Mail: dominik.steinle(at)kit.edu
Forschungsgruppe
Dominik StepienPhD StudentTel: +49 (0731) 50 34120Mail: dominik.stepien(at)kit.edu
Forschungsgruppe
Po-Hua SuPhD StudentTel: +49 (0731) 50 34121Mail: po-hua.su(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Alberto VarziScientistTel: +49 (0731) 50 34107Mail: alberto.varzi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Fanglin WuPhD StudentTel: +49 (0731) 50 34127Mail: fanglin.wu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Jinyu WuPhD StudentTel: Mail: jinyu.wu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Yun XuPhD StudentTel: Mail: yun.xu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Maider ZarrabeitiaScientistTel: +49 (0731) 50 34111Mail: maider.ipina(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries

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Innovative Electrochemical Energy Storage

Novel electrochemical energy storage technologies like rechargeable lithium-ion batteries (LIBs)  represent a step further with respect to more conventional chemistries (Ni-MH, Ni-Cd, and lead-acid batteries). Up to this point, LIBs are the storage technology of choice for consumer electronics (cell phones, laptop computers, etc.) as well as for large-scale applications, such as short-range electric and hybrid vehicles and stationary energy storage. However, new concepts are needed to reduce the cost of the battery production as well as to develop new cell chemistries capable of offering high capacity and/or power in connection with improved safety and the use of environmentally friendly materials.

 

Fields of Research

Lithium-Ion Batteries

For the improvement of current lithium-ion batteries technology, our group focuses on the investigation, optimization and development of existing and new active and inactive materials. We design, synthesize and investigate new nanostructured active materials and active material composites, allowing increased specific capacities and enhanced power densities. Although energy is a must, safety, recycling and environmental friendliness are required for sustainable large-scale markets. The use of safer conducting electrolyte salts, non-toxic materials and green processing are under development in our group.

 

Lithium-Air Batteries

As the lithium-air batteries battery offers a very high theoretical specific energy, the concept requires, for practical applications, solutions to numerous challenges. To cite a few: Li electrode operation, carbon cathode and electrolyte oxidation, as well as slow mass transport of O2 to the cathode, for which a flow cell is being developed to allow the operation with a fully flooded (and fully loaded) cathode to reach practical target.

 

Lithium-Sulfur Batteries

Sulfur as a cheap, abundant and high capacity conversion material is a very promising cathode. The challenge in this battery system is the solubility of lithium polysulfides, formed during the charge, which leads to rapid degradation of performance. Starting from Li2S, we synthesize carbon coated particles to encapsulate the sulfur and therefore enhance the cycle life of lithium-sulfur batteries.


Sodium-Ion Batteries

Sodium-ion batteries represent a relatively unexploited research field which has gained scientific and commercial interest within the last years. Indeed, it offers an appealing combination of lower cost and good electrochemical performance, providing an alternative to lithium-ion batteries in low cost applications or in fields where energy density is not a crucial issue.

In this exciting field we are working on the characterization and understanding of sodium-ion batteries, the development and improvement of battery components like positive and negative electrode materials and the use of various electrolytic solutions.

 

Magnesium-Ion Batteries

Magnesium might be an attractive alternative for lithium-ion battery technology because Mg is abundant, cheap and lightweight. However, the present electrolytes for this cell chemistry are neither safe nor environmentally friendly. Ionic liquids (see below) might solve these issues. In our group, we investigate and characterize mixtures of magnesium salts and ionic liquids as Mg electrolytes and develop methods for their characterisation.

 

Supercapacitors

Electrostatic charge storage offers high power performance. Electrochemical double-layer capacitors (EDLC) and lithium-ion capacitors (LIC) can provide large current in a very short time, resulting in high power density. Our efforts in this field are focused on the synthesis of graphene-based active materials and fluorine-free ionic liquid electrolytes as well as on the development of environmentally friendly methods for the production of composite electrodes, containing natural polysaccharide-based binders.

 

Competence Areas

Insertion Materials

Deep understanding of insertion chemistry is indispensable for the improvement and development of positive and negative electrode materials for secondary batteries and lithium-ion capacitors.

We focus on the synthesis (co-precipitation, solid state, xerogel, etc.) and the structural and electrochemical investigation of various transition metal compounds as well as carbonaceous and titanium based materials.

 

Conversion Materials

“Next generation” high energy batteries such as lithium-air or lithium-sulfur are generally deviating from the classical lithium-ion intercalation and insertion chemistry and store lithium by a so-called “conversion reaction”.

On the anode side, conversion anodes such as transition metal oxides are attracting interest for li-ion batteries, due to their high specific capacities exceeding that of graphite. The initial electrochemical reduction of the oxide forms transition metal nanograins that enable the reversible formation of Li2O.

 

Conversion-alloying Material

A new class of lithium-ion anodes combines the conversion and alloying mechanisms. These materials offer significantly increased specific capacities, enhanced rate performances, stabilized cycling, as well as the tailoring of the operating potential range. Examples are, for instance, carbon-coated ZnFe2O4 nanospheres or transition metal-doped zinc oxide nanoparticles, which show specific capacities of about 1000 mAh g-1 and exceptional rate capability.

 

Composite Electrodes

Most of the electrodes manufactured and investigated for application in batteries are composite electrodes. These electrodes are mainly composed of “active” (cathode or anode) materials, which are primarily responsible for electrochemical energy storage, but also contain smaller quantities of “inactive” compounds like conducting agents, binders or other additives. The synergy of these different compounds significantly influences the mechanical and electrochemical properties of battery electrodes. Within recent years we particularly focused on the research and development of environmentally benign, cost-efficient and biocompatible materials allowing advantageously the aqueous processing of lithium-ion electrodes.

 

Ionic Liquid Electrolytes

We design, synthesise and investigate room temperature molten salts (“ionic liquids”). They combine high electrochemical stability and ionic conductivity with low vapour pressure and low flammability, all being properties that are desirable for safer battery electrolytes.

 

Polymer Electrolytes

While allowing lithium metal anode use, polymer electrolytes feature desirable properties such as thermal and mechanical stability, safety, as well as good processability. Integration of ionic liquids into polymeric matrices improves the ionic conductivity, especially at low temperatures. Our main efforts are focused on the improvement of PEO and new polymer electrolyte systems for leakage-free batteries.

 

Flow Batteries

These devices are characterized by the active materials being dissolved or suspended in a liquid phase. This allows external storage of the ‘liquid electrodes’ limiting the weight of inactive components and, in addition, decoupling power and energy. Moreover, flow batteries offer the possibility of adjusting the chemistry of the system during the operating life.

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Die Forschungsgruppe Elektrochemie der Batterien hat neben eigenem Equipment auch Zugang zu einer Vielzahl unterschiedlicher Analysemessverfahren und -techniken.

Device

• Dry Room (25 sq.m.)
• Glove boxes
• Battery Cycler
• Impedance Analyzer and Potentiostat
• Multichannel Conductivity meter
• BET and Pycnometer
• Densitometer
• TGA/MS
• DSC
• FTIR Raman
• XRD
• Karl-Fischer
• Confocal Opticam Microscope
• Climatic Chambers
• Hot Press
• Microwave Reactor
• Muffle furnaces
• Planetary Ball Mill
• Supercritical fluids estractor
• Tube furnaces
• Ultrasonic Processor
• UV Chamber

 

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Greenlion

GREENLION is a Large Scale Collaborative Project within the FP7 leading to the manufacturing of greener and cheaper Li-Ion batteries for electric vehicle applications via the use of water soluble, fluorine-free, high thermally stable binders, which would eliminate the use of VOCs and reduce the cell assembly cost.

 

ABILE Project

ABILE (Air Batteries with Ionic Liquid Electrolytes) is a cooperative project of the BMW Group, Hanyang University in Seoul, La Sapienza University Rome, e&e and the HIU (KIT). Within this project the HIU is developing new high capacity anode materials based on a mixed conversion and alloying lithium storage mechanism and is investigating ionic liquid-based electrolytes for the application in non-aqueous Lithium-ion/Air electrochemical energy storage systems.

 

Innovative Electrochemical Supercapacitors (IES)

The project aims to develop electrochemical double layer capacitors with improved performance and enhanced intrinsic safety to be used in high voltage systems, through the employment of ionic liquid-organic electrolyte mixtures. Further objectives are the development of new materials for super capacitors, such as graphene and activated carbons, and F-free ionic liquids and natural binders to increase the environmental friendliness of the device.

Partners:

  • Helmholtz Institute Ulm – Karlsruhe Institute of Technology
  • University of Münster
  • Iolitech
  • Brandenburgische Kondensatoren

Further information

 

MARS-EV (Materials for Ageing Resistant Li-ion High Energy Storage for the Electric Vehicle)

MARS-EV is a Large Scale Collaborative Project (FP7-2013-GC-MATERIALS) developing materials for high energy and cycle-life Li-ion battery cells. The project aims to overcome the ageing phenomenon in Li-ion cells by focusing on the development of high-energy electrode materials and safe electrolyte systems with improved cycle life. Through industrial prototype cell assembly and testing coupled with modeling MARS-EV improves the understanding of the ageing behavior at the electrode and system levels. Finally, it addresses a full life cycle assessment of the developed technology.

 

Further information

 

Stationary electrochemical energy storage and transducer

Helmholtz energy alliances are part of the research network of the Helmholtz-Gemeinschaft. The alliances are dedicated to specific topics aiming to realize a sustainable energy supply in the future. The stationary energy storage and conversion takes an important share in this goal. However, stationary applications have requirements that are substentially different from the commercial Li-Ion technology. In this project, a variety of solutions are researched and evaluated, amongst others novel battery chemistries with magnesium and zinc, high temperature battery systems with solid-state electrolytes, as well as new approaches in electrolysis with fuel cells.

Partners:

  • Forschungszentrum Jülich
  • Karlsruher Institut für Technologie
  • Deutsches Zentrum für Luft- und Raumfahrt
  • Westfälische Wilhelms-Universität Münster
  • Ruhr-Universität Bochum
  • Rheinisch-Westfälische Technische Hochschule Aachen

Further information

 

MEET Hi-EnD: „Materials and Components to Meet High Energy Density Batteries”

The project MEET Hi-EnD is funded by a program of the German Federal Ministry of Education and Research (BMBF) with the goal to promote excellent battery research in Germany. The project is dedicated to the research of materials and components that allow to realise high energy density batteries.

Partners:

  • Universität Münster
  • RWTH Aachen  (Institut für Stromrichtertechnik und Elektrische Antriebe ISEA u. Institute of Inorganic Chemistry IAC)
  • Forschungszentrum Jülich
  • KIT
  • External partner: MIE University Japan

 

SIRBATT (Stable Interfaces for Rechargeable Batteries)

SIRBATT (Stable Interfaces for Rechargeable Batteries) is a European funded FP7 multisite collaborative project. It consists of 12 partners from across Europe and includes six universities, five industry partners and one research institute. The scientific aim of SIRBATT is a radical improvement in the fundamental understanding of the structure and reactions occurring at lithium battery electrode/electrolyte interfaces. This three year innovative project will explore the issues that currently limit the lifespan of batteries used in stationary battery storage.  It brings together a wide range of complementary research expertise in the study of battery electrode interfaces, covering both the experimental and theoretical aspects of this emerging area, as well as micro-sensor development.

 

InFluENCE (Interfaces of Fluid Electrodes: New Conceptual Explorations)

InFluENCE (FP7-ENERGY-2013-1) has as project proposal the improvement and fundamental understanding and control of interfaces of Li-ion and Na-ion Semi Solid Flow Batteries (SSFB). The fact that the case study is a SSFB set-up instead of conventional batteries is an asset, given that the methods and techniques developed are generic and could as well be implemented for conventional Li- and Na-ion systems for the techniques that are not concentrated on flow aspects.

A main objective is the investigation and optimization of the interfaces developing between the electrolyte and the electrochemically active material particles in fluid electrodes. A second main objective is the understanding and control of the mechanical and conductive behaviours of the slurries.

 

Further information

A specific filter for this group’s publications is not yet available. Please take a look at „publications“ in the website’s header for now.

Mitglieder
Asenbauer JakobPhD StudentTel: +49 (0731) 50 34115Mail: jakob.asenbauer(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Tugce AtesPhD StudentTel: +49 (0731) 50 34104Mail: tugce.ates(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Adele BirrozziPhD StudentTel: +49 (0731) 50 34115Mail: adele.birrozzi(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Dominic BresserPrincipal InvestigatorTel: +49 (0731) 50 34117Mail: dominic.bresser(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Zhen ChenScientistTel: +49 (0731) 50 34104Mail: chen.zhen(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hyeongseon ChoiPhD StudentTel: +49 (0731) 50 34113Mail: Hyeongseon.Choi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Xu DongPhD StudentTel: +49 (0731) 50 34123Mail: xu.dong(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Tobias EisenmannPhD StudentTel: +49 (0731) 50 34112Mail: tobias.eisenmann(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Giuseppe Antonio EliaScientistTel: +49 (0731) 50 34132Mail: giuseppe.elia(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Jin HanPhD StudentTel: +49 (0731) 50 34103Mail: jin.han(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Seyed Milad HosseiniPhD StudentTel: +49 (0731) 50 34111Mail: milad.hosseini(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Alessandro InnocentiPhD StudentTel: +49 (0731) 50 34111Mail: alessandro.innocenti(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Niyousha KarimiPhD StudentTel: +49 (0731) 50 34116Mail: niyousha.paridari(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Guk-Tae KimScientistTel: +49 (0731) 50 34110Mail: Guk-tae.kim(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Yong Il KimScientistTel: +49 (0731) 50 34110Mail: yongil.kim(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Susanne KraußeSecretary Prof. Stefano PasseriniTel: +49 (0731) 50 34102Mail: susanne.krausse(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Daniel RoscherPhD StudentTel: +49 (0731) 50 34131Mail: daniel.kroetschel(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Matthias KünzelScientistTel: +49 (0731) 50 34114Mail: matthias.kuenzel(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Huihua LiPhD StudentTel: +49 (0731) 50 34120Mail: huihua.li(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Qi LiPhD StudentTel: +49 (0731) 50 34027Mail: qi.li(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Haipeng LiangPhD StudentTel: Mail: hai-peng.liang(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Xu LiuPhD StudentTel: Mail: xu.liu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Alessandro MarianiScientistTel: +49 (0731) 50 34109Mail: alessandro.mariani(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Alexander MayerPhD StudentTel: +49 (0731) 50 34106Mail: alexander.mayer(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hyein MoonPhD StudentTel: Mail: hyein.moon(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Angelo MullaliuScientistTel: +49 (0731) 50 34121Mail: angelo.mullaliu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Florian NägelePhD StudentTel: +49 (0731) 50 34217Mail: florian.naegele(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesIT & Technik Administration
Mayokun Uzezi OlutogunPhD StudentTel: +49 (0731) 50 34114Mail: mayokun.olutogun(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Prof. Dr. Stefano PasseriniPrincipal InvestigatorTel: +49 (0731) 50 34101Mail: stefano.passerini(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Peter RuschhauptPhD StudentTel: +49 (0731) 50 34027Mail: peter.ruschhaupt(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Nikhil SchmelzlePhD StudentTel: +49 (0731) 50 34108Mail: nikhil.schmelzle(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Annika SchürPhD StudentTel: +49 (0731) 50 34127Mail: annika.schuer(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Hanno SchützPhD StudentTel: +49 (0731) 50 34122Mail: hanno.schuetz(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Kai ShiPhD StudentTel: +49 (0731) 50 34110Mail: kai.shi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dominik SteinlePhD StudentTel: +49 (0731) 50 34105Mail: dominik.steinle(at)kit.edu
Forschungsgruppe
Dominik StepienPhD StudentTel: +49 (0731) 50 34120Mail: dominik.stepien(at)kit.edu
Forschungsgruppe
Po-Hua SuPhD StudentTel: +49 (0731) 50 34121Mail: po-hua.su(at)kit.edu
ForschungsgruppeElectrochemistry for BatteriesYoung Investigator Group NEW E²
Dr. Alberto VarziScientistTel: +49 (0731) 50 34107Mail: alberto.varzi(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Fanglin WuPhD StudentTel: +49 (0731) 50 34127Mail: fanglin.wu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Jinyu WuPhD StudentTel: Mail: jinyu.wu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Yun XuPhD StudentTel: Mail: yun.xu(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Dr. Maider ZarrabeitiaScientistTel: +49 (0731) 50 34111Mail: maider.ipina(at)kit.edu
ForschungsgruppeElectrochemistry for Batteries
Forschung

(images will be uploaded shortly)

Innovative Electrochemical Energy Storage

Novel electrochemical energy storage technologies like rechargeable lithium-ion batteries (LIBs)  represent a step further with respect to more conventional chemistries (Ni-MH, Ni-Cd, and lead-acid batteries). Up to this point, LIBs are the storage technology of choice for consumer electronics (cell phones, laptop computers, etc.) as well as for large-scale applications, such as short-range electric and hybrid vehicles and stationary energy storage. However, new concepts are needed to reduce the cost of the battery production as well as to develop new cell chemistries capable of offering high capacity and/or power in connection with improved safety and the use of environmentally friendly materials.

 

Fields of Research

Lithium-Ion Batteries

For the improvement of current lithium-ion batteries technology, our group focuses on the investigation, optimization and development of existing and new active and inactive materials. We design, synthesize and investigate new nanostructured active materials and active material composites, allowing increased specific capacities and enhanced power densities. Although energy is a must, safety, recycling and environmental friendliness are required for sustainable large-scale markets. The use of safer conducting electrolyte salts, non-toxic materials and green processing are under development in our group.

 

Lithium-Air Batteries

As the lithium-air batteries battery offers a very high theoretical specific energy, the concept requires, for practical applications, solutions to numerous challenges. To cite a few: Li electrode operation, carbon cathode and electrolyte oxidation, as well as slow mass transport of O2 to the cathode, for which a flow cell is being developed to allow the operation with a fully flooded (and fully loaded) cathode to reach practical target.

 

Lithium-Sulfur Batteries

Sulfur as a cheap, abundant and high capacity conversion material is a very promising cathode. The challenge in this battery system is the solubility of lithium polysulfides, formed during the charge, which leads to rapid degradation of performance. Starting from Li2S, we synthesize carbon coated particles to encapsulate the sulfur and therefore enhance the cycle life of lithium-sulfur batteries.


Sodium-Ion Batteries

Sodium-ion batteries represent a relatively unexploited research field which has gained scientific and commercial interest within the last years. Indeed, it offers an appealing combination of lower cost and good electrochemical performance, providing an alternative to lithium-ion batteries in low cost applications or in fields where energy density is not a crucial issue.

In this exciting field we are working on the characterization and understanding of sodium-ion batteries, the development and improvement of battery components like positive and negative electrode materials and the use of various electrolytic solutions.

 

Magnesium-Ion Batteries

Magnesium might be an attractive alternative for lithium-ion battery technology because Mg is abundant, cheap and lightweight. However, the present electrolytes for this cell chemistry are neither safe nor environmentally friendly. Ionic liquids (see below) might solve these issues. In our group, we investigate and characterize mixtures of magnesium salts and ionic liquids as Mg electrolytes and develop methods for their characterisation.

 

Supercapacitors

Electrostatic charge storage offers high power performance. Electrochemical double-layer capacitors (EDLC) and lithium-ion capacitors (LIC) can provide large current in a very short time, resulting in high power density. Our efforts in this field are focused on the synthesis of graphene-based active materials and fluorine-free ionic liquid electrolytes as well as on the development of environmentally friendly methods for the production of composite electrodes, containing natural polysaccharide-based binders.

 

Competence Areas

Insertion Materials

Deep understanding of insertion chemistry is indispensable for the improvement and development of positive and negative electrode materials for secondary batteries and lithium-ion capacitors.

We focus on the synthesis (co-precipitation, solid state, xerogel, etc.) and the structural and electrochemical investigation of various transition metal compounds as well as carbonaceous and titanium based materials.

 

Conversion Materials

“Next generation” high energy batteries such as lithium-air or lithium-sulfur are generally deviating from the classical lithium-ion intercalation and insertion chemistry and store lithium by a so-called “conversion reaction”.

On the anode side, conversion anodes such as transition metal oxides are attracting interest for li-ion batteries, due to their high specific capacities exceeding that of graphite. The initial electrochemical reduction of the oxide forms transition metal nanograins that enable the reversible formation of Li2O.

 

Conversion-alloying Material

A new class of lithium-ion anodes combines the conversion and alloying mechanisms. These materials offer significantly increased specific capacities, enhanced rate performances, stabilized cycling, as well as the tailoring of the operating potential range. Examples are, for instance, carbon-coated ZnFe2O4 nanospheres or transition metal-doped zinc oxide nanoparticles, which show specific capacities of about 1000 mAh g-1 and exceptional rate capability.

 

Composite Electrodes

Most of the electrodes manufactured and investigated for application in batteries are composite electrodes. These electrodes are mainly composed of “active” (cathode or anode) materials, which are primarily responsible for electrochemical energy storage, but also contain smaller quantities of “inactive” compounds like conducting agents, binders or other additives. The synergy of these different compounds significantly influences the mechanical and electrochemical properties of battery electrodes. Within recent years we particularly focused on the research and development of environmentally benign, cost-efficient and biocompatible materials allowing advantageously the aqueous processing of lithium-ion electrodes.

 

Ionic Liquid Electrolytes

We design, synthesise and investigate room temperature molten salts (“ionic liquids”). They combine high electrochemical stability and ionic conductivity with low vapour pressure and low flammability, all being properties that are desirable for safer battery electrolytes.

 

Polymer Electrolytes

While allowing lithium metal anode use, polymer electrolytes feature desirable properties such as thermal and mechanical stability, safety, as well as good processability. Integration of ionic liquids into polymeric matrices improves the ionic conductivity, especially at low temperatures. Our main efforts are focused on the improvement of PEO and new polymer electrolyte systems for leakage-free batteries.

 

Flow Batteries

These devices are characterized by the active materials being dissolved or suspended in a liquid phase. This allows external storage of the ‘liquid electrodes’ limiting the weight of inactive components and, in addition, decoupling power and energy. Moreover, flow batteries offer the possibility of adjusting the chemistry of the system during the operating life.

Equipment

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Die Forschungsgruppe Elektrochemie der Batterien hat neben eigenem Equipment auch Zugang zu einer Vielzahl unterschiedlicher Analysemessverfahren und -techniken.

Device

• Dry Room (25 sq.m.)
• Glove boxes
• Battery Cycler
• Impedance Analyzer and Potentiostat
• Multichannel Conductivity meter
• BET and Pycnometer
• Densitometer
• TGA/MS
• DSC
• FTIR Raman
• XRD
• Karl-Fischer
• Confocal Opticam Microscope
• Climatic Chambers
• Hot Press
• Microwave Reactor
• Muffle furnaces
• Planetary Ball Mill
• Supercritical fluids estractor
• Tube furnaces
• Ultrasonic Processor
• UV Chamber

 

Zusammenarbeit

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Greenlion

GREENLION is a Large Scale Collaborative Project within the FP7 leading to the manufacturing of greener and cheaper Li-Ion batteries for electric vehicle applications via the use of water soluble, fluorine-free, high thermally stable binders, which would eliminate the use of VOCs and reduce the cell assembly cost.

 

ABILE Project

ABILE (Air Batteries with Ionic Liquid Electrolytes) is a cooperative project of the BMW Group, Hanyang University in Seoul, La Sapienza University Rome, e&e and the HIU (KIT). Within this project the HIU is developing new high capacity anode materials based on a mixed conversion and alloying lithium storage mechanism and is investigating ionic liquid-based electrolytes for the application in non-aqueous Lithium-ion/Air electrochemical energy storage systems.

 

Innovative Electrochemical Supercapacitors (IES)

The project aims to develop electrochemical double layer capacitors with improved performance and enhanced intrinsic safety to be used in high voltage systems, through the employment of ionic liquid-organic electrolyte mixtures. Further objectives are the development of new materials for super capacitors, such as graphene and activated carbons, and F-free ionic liquids and natural binders to increase the environmental friendliness of the device.

Partners:

  • Helmholtz Institute Ulm – Karlsruhe Institute of Technology
  • University of Münster
  • Iolitech
  • Brandenburgische Kondensatoren

Further information

 

MARS-EV (Materials for Ageing Resistant Li-ion High Energy Storage for the Electric Vehicle)

MARS-EV is a Large Scale Collaborative Project (FP7-2013-GC-MATERIALS) developing materials for high energy and cycle-life Li-ion battery cells. The project aims to overcome the ageing phenomenon in Li-ion cells by focusing on the development of high-energy electrode materials and safe electrolyte systems with improved cycle life. Through industrial prototype cell assembly and testing coupled with modeling MARS-EV improves the understanding of the ageing behavior at the electrode and system levels. Finally, it addresses a full life cycle assessment of the developed technology.

 

Further information

 

Stationary electrochemical energy storage and transducer

Helmholtz energy alliances are part of the research network of the Helmholtz-Gemeinschaft. The alliances are dedicated to specific topics aiming to realize a sustainable energy supply in the future. The stationary energy storage and conversion takes an important share in this goal. However, stationary applications have requirements that are substentially different from the commercial Li-Ion technology. In this project, a variety of solutions are researched and evaluated, amongst others novel battery chemistries with magnesium and zinc, high temperature battery systems with solid-state electrolytes, as well as new approaches in electrolysis with fuel cells.

Partners:

  • Forschungszentrum Jülich
  • Karlsruher Institut für Technologie
  • Deutsches Zentrum für Luft- und Raumfahrt
  • Westfälische Wilhelms-Universität Münster
  • Ruhr-Universität Bochum
  • Rheinisch-Westfälische Technische Hochschule Aachen

Further information

 

MEET Hi-EnD: „Materials and Components to Meet High Energy Density Batteries”

The project MEET Hi-EnD is funded by a program of the German Federal Ministry of Education and Research (BMBF) with the goal to promote excellent battery research in Germany. The project is dedicated to the research of materials and components that allow to realise high energy density batteries.

Partners:

  • Universität Münster
  • RWTH Aachen  (Institut für Stromrichtertechnik und Elektrische Antriebe ISEA u. Institute of Inorganic Chemistry IAC)
  • Forschungszentrum Jülich
  • KIT
  • External partner: MIE University Japan

 

SIRBATT (Stable Interfaces for Rechargeable Batteries)

SIRBATT (Stable Interfaces for Rechargeable Batteries) is a European funded FP7 multisite collaborative project. It consists of 12 partners from across Europe and includes six universities, five industry partners and one research institute. The scientific aim of SIRBATT is a radical improvement in the fundamental understanding of the structure and reactions occurring at lithium battery electrode/electrolyte interfaces. This three year innovative project will explore the issues that currently limit the lifespan of batteries used in stationary battery storage.  It brings together a wide range of complementary research expertise in the study of battery electrode interfaces, covering both the experimental and theoretical aspects of this emerging area, as well as micro-sensor development.

 

InFluENCE (Interfaces of Fluid Electrodes: New Conceptual Explorations)

InFluENCE (FP7-ENERGY-2013-1) has as project proposal the improvement and fundamental understanding and control of interfaces of Li-ion and Na-ion Semi Solid Flow Batteries (SSFB). The fact that the case study is a SSFB set-up instead of conventional batteries is an asset, given that the methods and techniques developed are generic and could as well be implemented for conventional Li- and Na-ion systems for the techniques that are not concentrated on flow aspects.

A main objective is the investigation and optimization of the interfaces developing between the electrolyte and the electrochemically active material particles in fluid electrodes. A second main objective is the understanding and control of the mechanical and conductive behaviours of the slurries.

 

Further information

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