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
孟嘉祺 1贾国凤 2杨红军 2唐发满 3彭正军 2李建伟 2王敏2
作者信息
- 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;青海省盐湖资源化学重点实验室,青海西宁 810008;中国科学院大学,北京 100049
- 2. 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;青海省盐湖资源化学重点实验室,青海西宁 810008
- 3. 五矿盐湖有限公司,青海西宁 810008
- 折叠
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).
Abstract
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 electro-chemical 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 tempera-ture.The results show that the electrolyte containing 15%v/v pp14 can effectively improve the high-temperature electrochemical stability and rate performance of the HC electrode.The superior electrochemi-cal 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Key words
Sodium ion batteries/Electrolyte additives/Ionic liquids/Allyl butyl containing piperidine/High temperature performance引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据