文献类型：期刊文献

英文题名：A Novel Tin-Bonded Silicon Anode for Lithium-Ion Batteries

作者：Dong, Zhe[1,2];Du, Wubin[1,2];Yan, Chenhui[1,2];Zhang, Chenyang[3];Chen, Gairong[3];Chen, Jian[4];Sun, Wenping[1,2];Jiang, Yinzhu[1,2];Liu, Yongfeng[1,2];Gao, Mingxia[1,2];Gan, Jiantuo[4];Yang, Yaxiong[4];Pan, Hongge[1,2]

第一作者：Dong, Zhe

通讯作者：Pan, HG[1];Pan, HG[2];Gan, JT[3];Yang, YX[3]

机构：[1]Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China;[2]Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China;[3]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[4]Xian Technol Univ, Inst Sci & Technol New Energy, Xian 710021, Peoples R China

第一机构：Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

通讯机构：[1]corresponding author), Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China;[2]corresponding author), Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China;[3]corresponding author), Xian Technol Univ, Inst Sci & Technol New Energy, Xian 710021, Peoples R China.

年份：2021

卷号：13

期号：38

起止页码：45578-45588

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20214010972179);Scopus(收录号：2-s2.0-85116030409);WOS:【SCI-EXPANDED(收录号:WOS:000703995900044)】；

基金：We gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 51831009, 51571178, and 51901168) and the Aerospace Innovation Fund of Shanghai (SAST2016116).

语种：英文

外文关键词：tin-bonded Si anode; hot-pressed method; metallic binder; adhesive strength; electronic conductivity; lithium-ion batteries

摘要：Poor cyclic stability and low rate performance due to dramatic volume change and low intrinsic electronic conductivity are the two key issues needing to be urgently solved in silicon (Si)-based anodes for lithium-ion batteries. Herein, a novel tin (Sn)-bonded Si anode is proposed for the first time. Sn, which has a high electronic conductivity, is used to bond the Si-anode material and copper (Cu) current collector together using a hot-pressed method with a temperature slightly above the melting point of Sn. The cycling performance of the electrode is studied using a galvanostatic method. Nanoindentation and peeling tests are conducted to measure the mechanical strength of the electrodes. Direct current polarization and galvanostatic intermittent titration techniques are applied to assess the conductivity of the composites. Electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy are conducted to evaluate the effect of the coating layer on the cycling ability of the composites. The Sn-bonded Si anodes show superior cycling stability and high rate performance with an improved initial Coulombic efficiency. Analyses reveal that the low-melting-point Sn helps to markedly improve the electronic conductivity of the electrodes and serves as a metallic binder as well to enhance the adhesive strength of the electrode. It is hopeful that this novel Sn-bonded Si anode provides a new insight for the development of advanced Si-based anodes for LIBs.