Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li-Ion Batteries

时间:2021-09-16作者:浏览量:119


Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li-Ion Batteries

作者:Du, XY (Du, Xingyang)[ 1 ] ; Zhang, HY (Zhang, Hanying)[ 1 ] ; Lan, XX (Lan, Xuexia)[ 1 ] ; Yuan, B (Yuan, Bin)[ 1 ] ; Hu, RZ (Hu, Renzong)[ 1 ]

 

ENERGY & ENVIRONMENTAL MATERIALS

 

DOI: 10.1002/eem2.12186

 

Early access icon在线发表日期: APR 2021

文献类型:Article; Early Access

 

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摘要

Silicon monoxide (SiO) has aroused increased attention as one of the most promising anodes for high-energy density Li-ion batteries. To enhance the initial Coulombic efficiencies (ICE) and cycle stability of SiO-based anodes, a new facile composition and electrode design strategy have been adapted to fabricate a SiO-Sn-Co/graphite (G) anode. It achieves a unique structure where tiny milled SiO-Sn-Co particles are dispersed among two graphite layers. In this hybrid electrode, Sn-Co alloys promoted Li+ extraction kinetics, and the holistic reversibility of SiO and graphite enhanced the electrical conductivity. The SiO-Sn-Co/G electrode delivered an average ICE of 77.6% and a reversible capacity of 640 mAh g(-1) at 800 mA g(-1), and the capacity retention was above 98% after 100 cycles, which was much higher than that of the SiO with an ICE of 55.3% and a capacity retention of 50%. These results indicated that this was reliable method to improve the reversibility and cycle ability of the SiO anode. Furthermore, based on its easy and feasible fabrication process, it may provide a suitable choice to combine other alloy anodes with the graphite anode.

 

关键词

作者关键词:ball milling; cycle performance; initial Coulombic efficiency; silicon monoxide; tin– cobalt alloy

 

作者信息

通讯作者地址:

 

South China University of Technology South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

通讯作者地址: Hu, RZ (通讯作者)

 

显示更多       South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:

 

显示更多       [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址:msrenzonghu@scut.edu.cn

 

基金资助致谢

基金资助机构显示详情       授权号

National Natural Science Foundation of China (NSFC)

 

52071144

51822104

51831009

51621001

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出版商

WILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA

 

类别 / 分类

研究方向:Materials Science

 

Web of Science 类别:Materials Science, Multidisciplinary