讲座题目：Following Function in Real Time: New NMR and MRI Methods for Studying Structure and Dynamics in Batteries and Supercapacitors

讲 座 人：Clare P. Grey

英国皇家学会院士、剑桥大学化学系教授、纽约州立大学石溪分校化学系教授、美国能源部东北化学储能前沿中心副主任

时    间：2014年10月25日（周六）16：00-17:00

地    点：厦门大学 卢嘉锡楼202报告厅

Clare P. Grey院士

Clare P. Grey是英国皇家学会院士、剑桥大学材料化学Geoffrey Moorhouse-Gibson教授。Grey教授于2009年加入剑桥大学， 2011年当选英国皇家学会院士。她致力于结合原位固体核磁共振和磁共振成像技术研究电极材料结构和动力学行为，是该领域国际权威专家。Grey教授的研究工作先后获得多项大奖，包括美国国家自然基金National Young Investigator Award (1994)，Dupont Young Professor Award (1997)，Ampere and RSC John Jeyes Awards（2010）等

欢迎广大师生踊跃参加！

能源材料化学协同创新中心

2014年10月16日

附 - 报告摘要：

Following Function in Real Time: New NMR and MRI Methods for Studying Structure and Dynamics in Batteries and Supercapacitors

Clare P. Grey^1,2

¹Department of Chemistry, University of Cambridge, Cambridge, UK

²Department of Chemistry, Stony Brook University, Stony Brook, USA

cpg27@cam.ac.uk

Cheaper and more efficient/effective ways to convert and store energy are required to reduce CO₂ emissions. Batteries, supercapacitors and fuel cells will play an important role, but significant advances require that we understand how these devices operate over a wide range of time and lengthscales. 

The development of light, long-lasting rechargeable batteries has been an integral part of the portable electronics revolution.  This revolution has transformed the way in which we communicate and transfer and access data globally, and has impacted developing nations as much as industrial societies.  The invention of the lithium-ion (Li-ion) battery, a rechargeable battery in which lithium ions (Li⁺) shuttle between two materials (LiCoO₂ and graphitic carbon) has been an integral part of these advances.  Rechargeable batteries are now poised to play an increasingly important role in transport and grid applications, but the introduction of these devices comes with different sets of challenges.  Importantly, fundamental science is key to producing non-incremental advances and to develop new strategies for energy storage and conversion. 

This talk will describe existing battery technologies and how they can be used to increase energy efficiency in transport and grid applications.  I will then describe our work in the development of methods that allow devices to be probed while they are operating (i.e., in-situ). This allows, for example, the transformations of the various cell components to be followed under realistic conditions without having to disassemble and take apart the cell.  To this end, the application of new in and ex-situ Nuclear Magnetic Resonance (NMR) and magnetic resonance imaging (MRI) approaches to correlate structure and dynamics with function in lithium-ion and lithium air batteries and supercapacitors will be described. The in-situ approach allows processes to be captured, which are very difficult to detect directly by ex-situ methods.  For example, we can detect side reactions involving the electrolyte and the electrode materials, sorption processes at the electrolyte-electrode interface, and processes that occur during extremely fast charging and discharging. Ex-situ NMR investigations allow more detailed structural studies to be performed to correlate local and long-range structure with performance in battery materials.