Local Structure Study of Lithium-ion Battery Electrodes Using Pair Distribution Function

主講人 : 花梟 博士

Binary  l fluoride cathodes and oxide anodes are desirable electrode candidates for future lithium-ion battery technologies. However, upon cycling, these electrode materials undergo phase heterogeneous reactions, involving intermediates that are either amorphous or with structural defects. These structural complexities render the characterization of these systems using conventional techniques difficult. To combat this challenge, I will present a methodology that centers on the pair distribution function (PDF) technique in combination with a modern big data approach. This methodology allows for multiphase deconvolution in the absence of any prior knowledge of the battery chemistry and is hence ideal to study complex electrochemical phase evolutions. The result of this study showed new mechanistic insights into these electrode materials that challenge our common understanding, helping to direct future efforts towards better material design for improved device performances. The methodology developed here also offers promising prospects in fields beyond energy storage.

主講人簡介：

花梟博士目前是英國蘭卡斯特大學Lecturer。他于2008年獲得復旦大學學士學位，碩士就讀于美國紐約州立大學石溪分校，他在劍橋大學的Dame Clare Grey 教授的指導下獲得了關于新型電池電極材料的博士學位。隨后，他加入了Adolphe Merkle研究所Ullrich Steiner 教授和謝菲爾德大學的Serena Cussen教授的研究小組，進行電極材料合成和先進表征的博士后研究。他獲得了瑪麗·居里獎學金，與牛津大學的Andrew Goodwin 教授和Peter Bruce爵士教授（FRS）合作。花博士的研究重點是闡明復雜結構在關鍵能源材料功能響應中的作用。他的研究成果已發表在多個高水平的同行評審期刊上，包括Nat Mater.、Nat.Commun.和JACS等。