哌啶基离子液体在钠离子电池中的高温性能研究  

High Temperature Performance Study of Piperidine-based Ionic Liquids in Sodium Ion Batteries

作　　者：孟嘉祺 贾国凤[1,2] 杨红军 唐发满[4] 彭正军 李建伟 王敏[1,2] MENG Jiaqi;JIA Guofeng;YANG Hongjun;TANG Faman;PENG Zhengjun;LI Jianwei;WANG Min(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China;Minmetal Salt Lake Co.,Ltd,Xining,810008,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源化学重点实验室,青海西宁810008 [3]中国科学院大学,北京100049 [4]五矿盐湖有限公司,青海西宁810008

出　　处：《盐湖研究》2024年第4期46-51,共6页Journal of Salt Lake Research

基　　金：2021年度青海省昆仑英才(高端创新创业人才计划);青海省科技厅基础研究计划(2023-ZJ-976Q)。

摘　　要：传统碳酸酯类电解液与钠离子电池硬碳负极相容性较差,选择合适的电解液添加剂是提升硬碳电极电化学性能行之有效的方法。研究合成了含烯丁基的哌啶离子液体(pp14),并以不同比例添加至基础电解液中,探究哌啶基离子液体在高温下对硬碳负极电化学性能的影响。结果表明,含15%体积比的pp14电解液可以有效提升HC电极的高温电化学稳定性及倍率性能,其优异的电化学性能归因于循环时形成了稳定的固体电解质界面(SEI)。Conventional carbonate electrolytes are less compatible with hard carbon anodes of sodium ion batteries,and the selection of suitable electrolyte additives is an effective method to enhance the electrochemical performance of hard carbon electrodes.In this paper,piperidine ionic liquid(pp14)containing allyl butyl was synthesized and added to the base electrolyte in different ratios to investigate the effect of piperidine-based ionic liquid on the electrochemical performance of hard carbon cathode at high temperature.The results show that the electrolyte containing 15%v/v pp14 can effectively improve the hightemperature electrochemical stability and rate performance of the HC electrode.The superior electrochemical performance was attributed to the formation of a stable solid electrolyte interface(SEI)during cycling.

关 键 词：钠离子电池 电解液添加剂 离子液体 含烯丁基哌啶 高温性能 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.12[化学工程—无机化工]