聚酰亚胺粘结剂对锂离子电池用硅碳复合材料循环性能的影响  

Effect of Polyimide Binder on Cycling Performance of Si/C Composite for Li-ion Battery

作　　者：何旻雁 杨志伟[1] 王振宇[1] 任小龙[1] 刘鑫雨 王烉然 罗加悦 朱凌云 HE Minyan;YANG Zhiwei;WANG Zhenyu;REN Xiaolong;LIU Xinyu;WANG Huanran;LUO Jiayue;ZHU Lingyun(Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China)

机构地区：[1]桂林电器科学研究院有限公司,广西桂林541004

出　　处：《绝缘材料》2019年第5期21-24,28,共5页Insulating Materials

基　　金：广西科技重大专项(桂科AA17204061);桂林市"1020"创新驱动计划重大攻关项目(20160203)

摘　　要：如何通过粘结剂有效抑制硅碳复合材料的体积膨胀一直是锂离子电池行业的研究热点。本文针对传统聚偏氟乙烯(PVDF)树脂无法有效抑制硅基复合材料体积膨胀的问题,利用高强度的改性聚酰亚胺树脂作为硅碳复合材料的粘结剂,通过不同基团的有效引入对电池性能进行提升。结果表明:使用聚酰亚胺类树脂作为硅碳复合材料的粘结剂时,可明显提高硅碳复合材料的循环性能,而采用具有羟基基团的PI-3聚酰亚胺树脂作为粘结剂时,硅碳复合材料的性能最佳。How to inhibit the volume expansion of silicon-carbon anode materials by binders has been a research hotspot in lithium-ion battery industry. Aiming at the problem that PVDF cannot effectively inhibit the volume expansion of silicon-based anode materials, a modified polyimide(PI) resin with high strength was prepared and used as the binder of silicon-carbon materials, and then the PI molecule was introduced different groups to improve the performance of battery. The results show that the cycling performance of silicon-carbon materials is improved obviously using polyimide resin as binder. When the PI-3 polyimide resin with hydroxyl group is used as binder, the cycling performance of silicon-carbon materials is the best.

关 键 词：硅碳复合材料 聚酰亚胺 改性 循环性能 

分 类 号：TM215[一般工业技术—材料科学与工程]