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(jiǎn)介：

花梟博士目前是英國(guó)蘭卡斯特大學(xué)Lecturer。他于2008年獲得復(fù)旦大學(xué)學(xué)士學(xué)位，碩士就讀于美國(guó)紐約州立大學(xué)石溪分校，他在劍橋大學(xué)的Dame Clare Grey 教授的指導(dǎo)下獲得了關(guān)于新型電池電極材料的博士學(xué)位。隨后，他加入了Adolphe Merkle研究所Ullrich Steiner 教授和謝菲爾德大學(xué)的Serena Cussen教授的研究小組，進(jìn)行電極材料合成和先進(jìn)表征的博士后研究。他獲得了瑪麗·居里獎(jiǎng)學(xué)金，與牛津大學(xué)的Andrew Goodwin 教授和Peter Bruce爵士教授（FRS）合作?；ú┦康难芯恐攸c(diǎn)是闡明復(fù)雜結(jié)構(gòu)在關(guān)鍵能源材料功能響應(yīng)中的作用。他的研究成果已發(fā)表在多個(gè)高水平的同行評(píng)審期刊上，包括Nat Mater.、Nat.Commun.和JACS等。