Localized-domains staging structure and evolution in lithiated graphite  

作　　者：Suting Weng Siyuan Wu Zepeng Liu Gaojing Yang Xiaozhi Liu Xiao Zhang Chu Zhang Qiuyan Liu Yao Huang Yejing Li Mehmet NAteş Dong Su Lin Gu Hong Li Liquan Chen Ruijuan Xiao Zhaoxiang Wang Xuefeng Wang 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing,China [3]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing,China [4]Energy Storage Division,TÜBİTAK Rail Transport Technologies Institute,TÜBİTAK Gebze Campus,Gebze,Kocaeli,Turkey [5]Tianmu Lake Institute of Advanced Energy Storage Technologies Co.,Ltd.,Liyang,Jiangsu,China

出　　处：《Carbon Energy》2023年第1期144-153,共10页碳能源（英文）

基　　金：support from the National Natural Science Foundation of China(NSFC nos.52172257,22005334,21773301 and 52022106);the Natural Science Foundation of Beijing(grant no.Z200013).

摘　　要：Intercalation provides to the host materials a means for controlled variation of many physical/chemical properties and dominates the reactions in metal‐ion batteries.Of particular interest is the graphite intercalation compounds with intriguing staging structures,which however are still unclear,especially in their nanostructure and dynamic transition mechanism.Herein,the nature of the staging structure and evolution of the lithium(Li)‐intercalated graphite was revealed by cryogenic‐transmission electron microscopy and other methods at the nanoscale.The intercalated Li‐ions distribute unevenly,generating local stress and dislocations in the graphitic structure.Each staging compound is found macroscopically ordered but microscopically inhomogeneous,exhibiting a localized‐domains structural model.Our findings uncover the correlation between the long‐range ordered structure and short‐range domains,refresh the insights on the staging structure and transition of Li‐intercalated/deintercalated graphite,and provide effective ways to enhance the reaction kinetic in rechargeable batteries by defect engineering.

关 键 词：cryogenic-transmission electron microscopy(cryo-TEM) graphite intercalation compounds lithiated graphite localized-domains structural model staging structures 

分 类 号：TM912[电气工程—电力电子与电力传动]