基本自由度视角下锂离子电池电极材料构效关系研究进展  

Advances in structure⁃property relationships of lithium⁃ion battery electrodes from the perspective of fundamental degrees of freedom

作　　者：林挺 谷林 LIN Ting;GU Lin(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190;Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国科学院物理研究所,北京100190 [2]清华大学材料科学与工程学院,北京100084

出　　处：《电子显微学报》2024年第4期487-499,共13页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.52322212).

摘　　要：不断增长和日益多元化的社会需求,对当前商用锂离子电池在能量密度、使用寿命、安全性、成本等方面提出了更高的要求。实验表征手段的发展推动构效关系在晶格、电荷、轨道、自旋四个基本自由度得以深入阐释,并促进推动了锂离子电池电极材料的性能改良。本文主要围绕晶格自由度相关的氧空位、表面、相界面等结构特性,以及多自由度耦合的O氧化还原、Jahn⁃Teller畸变和超交换相互作用等反应机制,对电极材料构效关系的前沿研究展开讨论,并展望了基本自由度下的透射电子显微学研究发展方向。Increasing and diversifying social demands have raised the standards for commercial lithium⁃ion batteries in terms of energy density,lifespan,safety,and cost.Advances in experimental characterization techniques have enabled an in⁃depth elucidation of structure⁃property relationships across four fundamental degrees of freedom:Lattice,charge,orbital,and spin.This progress has facilitated performance improvement in electrode materials for lithium⁃ion batteries.In this review,we primarily discussed recent progress in the structure⁃property relationships of electrodes,focusing on lattice⁃related structural characteristics such as oxygen vacancies,surfaces,and phase interfaces.We also explored reaction mechanisms involving coupled degree of freedom,such as O⁃redox,Jahn⁃Teller distortion,and superexchange interactions.Additionally,the paper looks forward to the further development direction of transmission electron microscopy research from the perspective of fundamental degrees of freedom.

关 键 词：锂离子电池 晶格 电荷 轨道 自旋 透射电子显微学 

分 类 号：O48[理学—固体物理] O646[理学—物理]