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
投稿时间:2023-04-26  修订日期:2023-05-31
DOI:
中文关键词:  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
英文关键词:Sodium ion batteries  Electrolyte additives  Ionic liquids  Allyl butyl containing piperidine  High temperature performance
基金项目:
作者单位邮编
孟嘉祺 中国科学院青海盐湖研究所 810008
贾国凤 中国科学院青海盐湖研究所 
杨红军* 中国科学院青海盐湖研究所 810008
唐发满 五矿盐湖有限公司 
彭正军 中国科学院青海盐湖研究所 
李建伟 中国科学院青海盐湖研究所 
王敏 中国科学院青海盐湖研究所 
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中文摘要:
      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。本文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。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)。
英文摘要:
      Conventional carbonate electrolytes are less compatible with hard carbon anodes of sodium ion batteries, and the selection of suitable electrolyte additives is a proven 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 high-temperature 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.
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