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2018年度广东省海外名师项目报告
  • 发布单位:机械工程学院
  • 发布时间:2018-12-03
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报告名称

2018年度广东省海外名师项目报告

Advanced Characterization of Novel Battery Materials (新型电池材料的高级表征方法)

报告时间

20181210日(周一)早上900,机电楼12C304

参加人员:研究方向相近的教师与感兴趣的学生

主办单位:人力资源处   机械工程学院

个人简介

Holger Geßwein

Dr. Holger Geßwein is a staff member at Institute for Applied Materials – Ceramic Materials and Technologies (IAM-KWT), Karlsruhe Institute of Technology (KIT) and a group Leader at Helmholtz-Institute Ulm (HIU).

Education

1994 - 2001

 

2002 - 2005

 

 

2005 - 2008

 

Diploma Degree in Mineralogy, University of Karlsruhe, Germany (now KIT)

Dissertation in Applied Science at the Research Center Karlsruhe/University of Freiburg on the topic “Development of Netshape Oxide Ceramics”

Postdoctoral Researcher at University of Freiburg, IMTEK, Department of Materials Process Technology

Professional Career

2002 - 2005

2005 - 2008

 

since 2009

since 2011

Research Assistant Research Center Karlsruhe

Postdoctoral Researcher at University of Freiburg, IMTEK, Department of Materials Process Technology

Researcher at KIT

Principal Investigator Helmholtz-Institute Ulm (HIU)

Current Areas of Research

·      In situ investigations of lithium-ion-batteries and nanomaterials

·      Structure and chemistry of electrode materials

·      X-ray Diffraction and Spectroscopy

Reiner Mönig

Dr. Reiner Mönig is a group Leader at Institute for Applied Materials – Materials and Biomechanics (IAM-WBM), Karlsruhe Institute of Technology (KIT) and a group Leader at Helmholtz-Institute Ulm (HIU).

Education

1990 - 1998

 

2000 - 2004

 

 

2004 - 2007

 

Diploma Degree in Physics, University of Karlsruhe, Germany (now KIT)

Dissertation in Materials Science at the Max-Planck-Institute for Metals Research/University of Stuttgart on the topic Thermal Fatigue of Thin Films

Postdoctoral Researcher at Massachusetts Institute of Technology, Department of Materials Science and Engineering

Professional Career

2000 - 2004

 

2004 - 2007

since 2007

since 2008

 

since 2011

since 2012

Research Assistant Max-Planck-Institute for Metals Research, Stuttgart

Postdoctoral Associate Massachusetts Institute of Technology

Researcher at KIT

Group Leader of groups Nanomechanics and battery research at IAM-WBM, KIT

Principal Investigator Helmholtz-Institute Ulm (HIU)

Topic Speaker Topic I: Metal Deposition at HIU

Current Areas of Research

·       In situ investigations of lithium-ion-batteries and nanomaterials

·       Structure and chemistry of electrode materials

·       Degradation mechanisms of lithium-ion-batteries

·       Interaction between electrochemistry and mechanics

·       Mechanical behavior of various nanomaterials

报告简介

Rechargeable batteries require reversible chemical reactions. In particular for high energy batteries, often the poor reversibility of the electrochemical reactions at the electrodes limit their applicability. Therefore, materials with reversible structural and morphological changes are essential. Electrodes contain nanoscale materials with light elements and are sensitive to humidity which makes their investigation challenging. Our research is concerned with the investigation of electrode materials with respect to structure, mechanics and morphology. Over the last few years we have developed and applied a set of operando characterization techniques that help in assessing electrode materials. We mainly use X-ray diffraction to determine the crystal structure of electrodes, light and electron microscopy for recording their morphology and the substrate curvature technique for measuring mechanical loads caused by changes in volume during electrochemical cycling. These techniques can be used on most insertion and conversion materials (e.g. materials for lithium and sodium batteries). Our test cells exhibit a very high reliability/reliability and our light microscopy inside a cell is at the physical resolution limit. As an example, we will present our recent data obtained on LiNi0.8Mn0.1Co0.1O2 that demonstrates how the different techniques can be combined to explore the reaction pathways and degradation mechanisms in this material. Our task within KIT is to investigate electrode materials with respect to reaction and degradation pathways. With this knowledge we attempt to optimize the battery materials in collaboration with synthesis and processing groups. This collaborative approach results in optimized/tailored materials and therefore is very promising for the development of novel batteries.