文献类型：期刊文献

英文题名：Modification mechanism of graphite anode in lithium-ion battery coated with ethylene tar pitch

作者：Chen, Rongqi[1,2];Zhang, Yongzheng[1,2];Wang, Yanli[1,2];Shen, Chunyin[1,2];Zhan, Liang[1,2];Ling, Licheng[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai Key Lab Multiphase Mat Chem Engn,State Ke, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：55

期号：4

起止页码：865

外文期刊名：JOURNAL OF APPLIED ELECTROCHEMISTRY

收录：;EI(收录号：20244317254073);WOS:【SCI-EXPANDED(收录号:WOS:001338512900002)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 22075081, 52372045 and U1710252), the Fundamental Research Funds for the Central Universities (JKD01231701), China Postdoctoral Science Foundation (No. 2023M731084), Shanghai Sailing Program of China (23YF1408900).

语种：英文

外文关键词：Lithium-ion batteries; Graphite anode; Coating modification; Ethylene tar pitch

摘要：Coating modification is a convenient method to improve the electrochemical properties of graphite anode in lithium-ion batteries. Ethylene tar pitch is a proper precursor as the coating material for its advantages of high C/H ratio, low ash content, and easy accessibility. After liquid coating and carbonization, an amorphous carbon layer could be coated on the natural graphite to improve the insertion approach of the lithium ions. In the charging and discharging processes, graphite was separated from the electrolyte by the carbon layer, creating a stable solid electrolyte interface to prevent the exfoliation of the graphite sheet and decrease the occurrence of side reactions on the surface. The improved compatibility with the electrolyte could reduce the transfer resistance and facilitate the migration of the lithium ions. A uniform and stable coating layer on the graphite apparently improved the electrochemical performance, particularly the long cycle stability and high-rate performance. After coating, the capacity retention after 500 cycles increased from 49 to 74%, while the specific capacity was similar to 145 mAh g(-1) at 4 C in the coating sample compared with similar to 20 mAh g(-1) in the natural graphite. [GRAPHICS] .