Comparison of commercial silicon-based anode materials for the design of a high-energy lithium-ion battery  

作　　者：Minhong Choi Eunhan Lee Jaekyung Sung Namhyung Kim Minseong Ko 

机构地区：[1]Division of Convergence Materials Engineering,Pukyong National University,Busan 48547,Republic of Korea [2]Department of Materials Engineering and Convergence Technology,Gyeongsang National University,501 Jinju-daero,Jinju 52828,Republic of Korea [3]Department of Materials System Engineering,Pukyong National University,Busan 48547,Republic of Korea

出　　处：《Nano Research》2024年第6期5270-5277,共8页纳米研究（英文版）

基　　金：the Technology Innovation Program(No.20010542,Development of Petroleum Pitch Based Conductive Material and Binder for Lithium Ion Secondary Battery and Their Application)funded by the Ministry of Trade,Industry&Energy(MOTIE,Republic of Korea);the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.2021R1A2C1095408).

摘　　要：Silicon(Si)is considered a potential alternative anode for next-generation Li-ion batteries owing to its high theoretical capacity and abundance.However,the commercial use of Si anodes is hindered by their large volume expansion(~300%).Numerous efforts have been made to address this issue.Among these efforts,Si-graphite co-utilization has attracted attention as a reasonable alternative for high-energy anodes.A comparative study of representative commercial Si-based materials,such as Si nanoparticles,Si suboxides,and Si−Graphite composites(SiGC),was conducted to characterize their overall performance in high-energy lithium-ion battery(LIB)design by incorporating conventional graphite.Nano-Si was found to exhibit poor electrochemical performance,with severe volume expansion during cycling.Si suboxide provided excellent cycling stability in a full-cell evaluation with stable volume variation after 50 cycles,but had a large irreversible capacity and remarkable volume expansion during the first cycle.SiGC displayed a good initial Coulombic efficiency and the lowest volume change in the first cycle owing to the uniformly distributed nano-Si layer on graphite;however,its long-term cycling stability was relatively poor.To complement each disadvantage of Si suboxide and SiGC,a new combination of these Si-based anodes was suggested and a reasonable improvement in overall battery performance was successfully achieved.

关 键 词：silicon-based anode HIGH-ENERGY COMPARISON lithium ion battery blended electrode 

分 类 号：TM912[电气工程—电力电子与电力传动]