纤维素科学与技术2024，Vol.32Issue(3)：26-31,6.DOI:10.16561/j.cnki.xws.2024.03.01
功能化壳聚糖基聚合物粘结剂在硅碳负极中的性能研究
Functionalized Chitosan-based Polymer Binder in Silicon-carbon Negative Electrodes
摘要
Abstract
Using chitosan as the foundation,we ingeniously introduced carboxyl groups to enhance its water solubility and further grafted phenylboronic acid groups with hydroxyl-terminated polydimethylsiloxane(PDMS-OH)for crosslinking,successfully fabricating a polymer binder with a three-dimensional network structure.This innovative design not only significantly improved the water solubility of the binder but also strengthened its interaction with active materials,resulting in higher stability during battery cycling.Additionally,the introduction of the flexible PDMS segment created efficient channels for lithium ion transport,while the boron element in the grafted phenylboronic acid groups facilitated the desolvation of lithium ions,further accelerating their transport.Consequently,this binder conferred exceptional lithium ion diffusion coefficients(both charge and discharge coefficients reaching 10-9.6)to the battery,enabling it to maintain outstanding specific capacity even at high current densities.This significantly enhanced the battery's rate performance and achieved a remarkable initial Coulombic efficiency of 96.27%.With its robust binding strength and high lithium ion diffusion coefficient,the binder prepared in this study exhibited excellent performance in silicon-carbon anodes,providing rapid and stable performance for batteries during high-rate cycling.Therefore,this CFPO binder undoubtedly stands out as an outstanding choice for silicon-carbon anodes.关键词
硅碳负极/硼酸/壳聚糖/锂离子扩散系数/水溶性粘结剂Key words
Silicon/Graphite/boronic acid/Chitosan/lithium ion diffusion coefficient/water soluble binder分类
化学化工引用本文复制引用
李智琪,石元昊,付玉林,桂雪峰,许凯..功能化壳聚糖基聚合物粘结剂在硅碳负极中的性能研究[J].纤维素科学与技术,2024,32(3):26-31,6.基金项目
中国科学院科技服务网络计划(No.20211600200052). （No.20211600200052）
