广州化学2024，Vol.49Issue(6)：1-6,6.DOI:10.16560/j.cnki.gzhx.20240614
多孔硅基复合材料的可控制备及其应用于锂电池负极材料的研究
Preparation of POSS-based Porous Anode Material and its Performance Research
摘要
Abstract
Two types of incompletely condensed lithium sesquisiloxane silanols with phenyl or vinyl group were composited with polyacrylonitrile(PAN),and then the porous structure was prepared by the Friedel-Crafts reaction.After high-temperature carbonization process,the porous silicon-based anode materials were finally prepared.The porous structure of the material was characterized by scanning electron microscopy(SEM)and N2 adsorption and desorption tests,and the sample anode was subjected to continuous charging and discharging tests on a LAND battery test system.The results show that the porous silicon-based composites prepared in this paper possess a good porous structure with a pore size of 4 nm.After being applied to the anode of lithium-ion batteries,their first-cycle coulombic efficiency is as high as 78.5%,and they are able to maintain a specific capacity of 665.2 mAh/g after 200 cycles,with a capacity retention rate of 87.9%.Reversible specific capacity of 318.3 mAh/g is maintained even at a high current density of 2 A/g.关键词
笼型倍半硅氧烷(POSS)/锂离子电池/硅基负极材料/多孔材料/初始库伦效率Key words
polyhedral oligomeric silsequioxane(POSS)/lithium-ion battery/silicon-based anode material/porous material/initial coulomb efficiency分类
信息技术与安全科学引用本文复制引用
付玉林,李智琪,石元昊,桂雪峰,许凯..多孔硅基复合材料的可控制备及其应用于锂电池负极材料的研究[J].广州化学,2024,49(6):1-6,6.基金项目
中国科学院科技服务网络计划(No.20211600200052) （No.20211600200052）
