文献类型：期刊文献

英文题名：Si/Ti3SiC2 composite anode with enhanced elastic modulus and high electronic conductivity for lithium-ion batteries

作者：Dong, Zhe[1,2];Gu, Haitao[3];Du, Wubin[1,2];Feng, Zhenhe[3];Zhang, Chenyang[4];Jiang, Yinzhu[1,2];Zhu, Tiejun[1,2];Chen, Gairong[4];Chen, Jian[5];Liu, Yongfeng[1,2];Gao, Mingxia[1,2];Pan, Hongge[1,2]

第一作者：Dong, Zhe

通讯作者：Gao, MX[1];Pan, HG[1];Gao, MX[2];Pan, HG[2]

机构：[1]Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China;[2]Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;[3]Shanghai Inst Space Power Sources, State Key Lab Space Power Technol, Shanghai 200245, Peoples R China;[4]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[5]Xian Technol Univ, Sch Mat Sci & Chem Engn, Xian 710021, Shaanxi, Peoples R China

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

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

年份：2019

卷号：431

起止页码：55-62

外文期刊名：JOURNAL OF POWER SOURCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000474500700008)】；

基金：We gratefully acknowledge the financial support from National Natural Science Foundation of China (Grant Nos. 51571178, 51831009 and U1601212), National Materials Genome Project (Grant No. 2016YFB0700600), The Science and Technology Program of Zhejiang Province, China (Grant No. 2017C31085), and Aerospace Innovation Fund of Shanghai (SAST2016116).

语种：英文

外文关键词：Ti3SiC2; Silicon; Cycling stability; Rate performance; Lithium-ion batteries

摘要：Large volume changes (similar to 300%) during cycling and low electronic conductivity of silicon (Si) always lead to the failure of the Si anode for lithium-ion batteries. In this paper, we report a facile method to fabricate Si/Ti3SiC2 composites by one-step sand-milling process. Ti3SiC2 is used as a mechanical strengthening and high conductive matrix for Si-based anode for the first time. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are conducted to characterize the structure and morphology of the Si/Ti3SiC2 composites. Capacity and cycling performance are studied by galvanostatic method. Nanoindentation test is performed to measure the elastic modulus and hardness of the electrodes. Electrochemical impedance spectroscopy (EIS) and four-probe electronic conductivity measurement are used to assess the effect of Ti3SiC2 on the electronic conductivity of Si anode. Electrochemical investigations show that both cycling stability and rate performance of Si/Ti3SiC2 anodes are significantly improved comparing with those of the pure Si anode. SEM, nanoindentation and four-probe electronic conductivity measurement results reveal that the Ti3SiC2 can not only significantly enhance the electronic conductivity of the Si/Ti3SiC2 anodes but also maintain the integrity of the electrode during cycling by markedly increasing the elastic modulus and hardness of the electrodes.