文献类型：期刊文献

英文题名：A Unique Structural Highly Compacted Binder-Free Silicon-Based Anode with High Electronic Conductivity for High-Performance Lithium-Ion Batteries

作者：Dong, Zhe[1,2];Du, Wubin[1,2];Gu, Haitao[4];Long, Yingying[1,2];Zhang, Chenyang[3];Chen, Gairong[3];Feng, Zhenhe[4];Sun, Wenping[1,2];Jiang, Yinzhu[1,2];Liu, Yongfeng[1,2];Yang, Yaxiong[5];Gan, Jiantuo[2,5];Gao, Mingxia[1];Pan, Hongge[1,2]

第一作者：Dong, Zhe

通讯作者：Gao, MX[1];Pan, HG[1];Gan, JT[2];Pan, HG[2];Gan, JT[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]Shanghai Inst Space Power Sources, State Key Lab Space Power Technol, Shanghai 200245, Peoples R China;[5]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：2022

卷号：3

期号：2

外文期刊名：SMALL STRUCTURES

收录：;Scopus(收录号：2-s2.0-85163392987);WOS:【SCI-EXPANDED(收录号:WOS:000719145900001)】；

基金：Z.D. and W.D contributed equally to this work. The authors gratefully acknowledge financial support from National Natural Science Foundation of P. R. China (grant nos. 51831009, 51571178, and 51901168), Natural Science Basic Research Plan in Shanxi Province of China (grant no. 2020JQ-809), and Aerospace Innovation Fund of Shanghai (SAST2016116).

语种：英文

外文关键词：hot pressing; lithium-ion batteries; metallurgical bonding; Si-based anodes; structural integrities

摘要：Herein, a unique structural Si-based anode with high electronic conductivity, high compact density, and with no traditional organic binder is put forward. By adding a few amounts of Sn to the Si anode material, followed by carbonization of the organic binder after the general anode preparation and subsequently hot pressing, Sn melts and squeezes during hot pressing, bonding strongly the Si particles, and an interlayer of Cu3Si/Cu3Sn is in situ formed at the interface of the Si-based active materials and the Cu current collector, resulting in a metallurgical bonding between them. The organic binder-derived carbon coats on the Si particles, coupling with the squeezed Sn and the Cu3Si/Cu3Sn interlayer, and a highly electron conductive skeleton is formed. The skeleton also offers a highly stable structural integrity of the electrode during cycling. With an optimization of the hot-pressing pressure, the Si-based anode shows superior cycling stability and rate performance. As the active materials are almost compacted to half of its initial thickness, the electrode has potential for high volumetric capacity. The fabrication method is new for Si-based anodes of high compact density. The work provides new insights into the development of advanced silicon-based anodes for lithium-ion batteries.