Modifying SiO as a ternary composite anode material((SiOx/G/SnO2)@C) for Lithium battery with high Li-ion diffusion and lower volume expansion
作者:Yuan, TX (Yuan, Tianxiang) [1] , [2] ; Tang, RH (Tang, Renheng) [2] ; Xiao, FM (Xiao, Fangming) [2] ; Zuo, SY (Zuo, Shiyong) [2] ; Wang, Y (Wang, Ying) [2] ; Liu, JW (Liu, Jiangwen) [1]
(由 Clarivate 提供)
卷439
文献号141655
DOI10.1016/j.electacta.2022.141655
出版时间JAN 20 2023
在线发表DEC 2022
已索引2023-01-21
文献类型Article
摘要
The silicon suboxide (SiO) anode material is considered to be a promising anode material of Lithium-ion batteries (LIBs), because of its high theoretical capacity. However, there are severe problems for SiO, including the huge volume change (200%), the low electrical conductivity and the low first Coulombic efficiency. In order to solve those problems, a ternary composite ((SiOx/G/SnO2)@C) (G denotes graphite) with carbon coating layer is prepared by ball milling, spray drying and sintering. In the composite, graphite as one part of the active materials, can improve the Coulombic efficiency and control volume change of SiOx. To further restrain the high-volume change of SiOx, the carbon coating layer is designed. In particular, owing to the presence of SnO2, a better electrochemical performance for (SiOx/G/SnO2)@C is obtained. The results show that the first charging capacity of (SiOx/G/SnO2)@C can reach 382.6 mAh g(-1) at current density of 100 mA g(-1) and the Coulombic efficiency is improved from 62.2% to 74.9%. After 110 cycles, the charging capacity is 424.6 mAh g(-1) and the capacity retention rate is 103.9%. In addition, after 90 cycles of rate performance test, (SiOx/G/SnO2)@C exhibited the highest capacity retention of 104.7%.
关键词
作者关键词Lithium-ion batteryanodesilicon suboxideSnO2
Keywords PlusHIGH-PERFORMANCE ANODEIN-SITU XRDSILICON-BASED ANODESGRAPHITE COMPOSITEELECTRODES
作者信息
通讯作者地址
Liu, Jiangwen
(通讯作者)
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
所属机构
South China University of Technology
通讯作者地址
Zuo, Shiyong;
Wang, Ying
(通讯作者)
Guangdong Acad Sci, Inst Resources Utilizat & Rare Earth Dev, Key Lab Separat & Comprehens Utilizat Rare Met, Guangzhou 510650, Guangdong, Peoples R China
地址
1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
2 Guangdong Acad Sci, Inst Resources Utilizat & Rare Earth Dev, Key Lab Separat & Comprehens Utilizat Rare Met, Guangzhou 510650, Guangdong, Peoples R China
电子邮件地址zshiywork@outlook.comwy2228086@163.commejwliu@scut.edu.cn
类别/分类
研究方向Electrochemistry
引文主题
2 Chemistry
2.62 Electrochemistry
2.62.138 Lithium-Ion Battery
Sustainable Development Goals
11 Sustainable Cities and Communities
Web of Science 类别Electrochemistry