广州化学2025，Vol.50Issue(4)：1-6,6.DOI:10.16560/j.cnki.gzhx.20250415
三维弹性导离子网络丙烯酸酯基粘结剂在硅碳负极中的性能
Performance of Functionalized Acrylate-based Ion-conductive Network Binder in Silicon-carbon Anode
摘要
Abstract
Aiming at silicon carbon(Si/C)anode materials with industrialization potential,the polymeric binder(PACR)with three-dimensional elastic ion-conductive network structure has been successfully prepared by modular functional structure design combined with acrylate free radical polymerization.In order to explore the advantages of the binder,the structure and mechanical properties of the binder were characterized by infrared spectroscopy and 180° stripping force test respectively.The electrochemical properties of PACR and conventional PVDF anodes were compared using long-term charge/discharge cycling and cell rate tests,and verified from the perspective of electrochemical mechanism with cyclic voltammetry and electrochemical impedance spectroscopy tests.As a result,the superior electrochemical performance of Si/C anode with PACR binder was demonstrated with a high initial coulomb efficiency of 82.02%and the reversible specific capacity was maintained at 356.7 mAh/g at a high current density of 4 C.Unlike the single linear adhesion structure of traditional binders,the three-dimensional restricted structure of PACR can effectively withstand the stress impact generated by the dramatic expansion of Si particles,and the functional groups on the side chains achieve strong adhesion at the interface between the binder and the Si/C material through supramolecular interaction,providing excellent mechanical properties for the integrity of the anode structure.In addition,considering the intrinsic ionic conductivity inertness of Si/C materials,the introduced ether bond groups help lithium ions to conduct rapidly through coordination,which makes up for the defect.关键词
硅碳负极/丙烯酸酯/功能结构设计/离子传导网络Key words
silicon-carbon anode/polyacrylate/functional structure design/ion conduction network分类
化学化工引用本文复制引用
周仁杰,桂雪峰,龚子洋,胡继文,韩亚芳,李炜乐,刘洋,黎伟欣..三维弹性导离子网络丙烯酸酯基粘结剂在硅碳负极中的性能[J].广州化学,2025,50(4):1-6,6.基金项目
国家自然科学基金(51503124、21404121、214041222) （51503124、21404121、214041222）
广州市科学技术项目(202102021194) （202102021194）
清远科技项目(2022YFJH004) （2022YFJH004）
