文献类型：期刊文献

英文题名：Multifunctional lithium compensation agent based on carbon edges catalysis and its application in anode-free lithium batteries

作者：Wu, Yingjie[1];Shen, Bolei[1];Zhu, Zhengju[1];He, Ying[1];Wei, Zhong[2];Wei, Jie[1];Jiang, Hao[1];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai Environm Friendly Mat Tech Serv Platform, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, Shihezi 832003, Peoples R China

年份：2023

卷号：458

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20230313398368);WOS:【SCI-EXPANDED(收录号:WOS:000922108500001)】；

基金：This work was supported by the National Natural Science Foundation of China (21978088, 91534202, 51673063, 22108079), Program of Shanghai Academic/Technology Research Leader (20XD1433600), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning, and the Fundamental Research Funds for the Central Universities (222201718002), Shanghai Pujiang Program(21PJD018), Shanghai "Science and Technology Innovation Action Plan" technical standard project(19DZ2205300). Additional support was provided by fringe Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Lithium compensation agent; Carbon edges; LiFePO4; Anode-free batteries

摘要：Lithium compensation agents, especially the self-sacrificing salts, can effectively compensate for the irreversible capacity loss of lithium-ion battery, but most lithium compensation materials only have the function of lithium compensation and their mechanisms are still unknown. In this study, a method for preparing multifunctional lithium compensation agent Li2C4O4 (lithium squarate) microspheres using spray drying to extend the cycle life of anode-free batteries is proposed, and the catalytic effect of the carbon edges on Li2C4O4 decomposition was evaluated. The Li2C4O4 microspheres can release additional capacity via decomposition and produce CO2 to improve the stability of the battery, as well as generate carbon bridges at the carbon edges to improve the rate performance of the battery. When it was applied to LiFePO4 battery system, the capacity increased from 60 mAh/ g to 90 mAh/g at a current density of 10C. When applied to a Cu||LiFePO4 anode-free battery, an active lithium reserve layer formed on the surface of copper foil through Li2C4O4 decomposition, thus prolonging the cycling performance of the battery without any surface modification. After 40 turns at a current density of 0.1C, the cycling capacity retention was higher than 96%.