储能科学与技术 ›› 2023, Vol. 12 ›› Issue (5): 1409-1426.doi: 10.19799/j.cnki.2095-4239.2023.0256

• 喜迎东北大学建校百年-储能电池关键材料与循环技术专刊 • 上一篇    下一篇

钾离子电池电解液的研究进展及展望

王轩臣(), 王达, 刘朝孟(), 高宣雯, 骆文彬   

  1. 东北大学冶金学院,辽宁 沈阳 110000
  • 收稿日期:2023-04-21 修回日期:2023-04-26 出版日期:2023-05-05 发布日期:2023-05-29
  • 通讯作者: 刘朝孟 E-mail:2271795@stu.neu.edu.cn;liuzhaomeng@smm.neu.edu.cn
  • 作者简介:王轩臣(2000—),男,硕士研究生,研究方向为钾离子电池正极层状氧化物材料,E-mail:2271795@stu.neu.edu.cn
  • 基金资助:
    国家自然科学青年基金(52204308);中国博士后基金面上项目(ZX20220158);“兴辽英才”青年拔尖(XLYC2007155);中央高校基本科研业务费(N2025018);东北大学博士后基金(01270012810287)

Research progress and prospect of potassium ion battery electrolyte

Xuanchen WANG(), Da WANG, Zhaomeng LIU(), Xuanwen GAO, Wenbin LUO   

  1. School of Metallurgy, Northeastern University, Shenyang 110000, Liaoning, China
  • Received:2023-04-21 Revised:2023-04-26 Online:2023-05-05 Published:2023-05-29
  • Contact: Zhaomeng LIU E-mail:2271795@stu.neu.edu.cn;liuzhaomeng@smm.neu.edu.cn

摘要:

钾离子电池(PIBs)具有资源丰富、成本低廉、环境友好及能量密度高等优点,成为替代锂离子电池(LIBs)的理想新型储能体系。尽管近年来PIBs在电极领域的研究已经取得了显著进展,但当前钾离子电池电解液的研究仍在初级阶段,其设计和使用面临如电解液和电极之间严重的副反应,导致不稳定的固-液界面和低库仑效率等诸多挑战。因此,发展优良的电解液是PIBs实现产业化应用的关键。本文对近年来PIBs电解液的特点及研究进展进行了综述和讨论。首先聚焦于有机电解液、水系电解液、离子液体电解液和固体电解质等4个主流电解液的发展现状和前景,着重介绍了有机电解液中的酯基电解液和醚基电解液,总结了当前PIBs电解液面临的关键问题,包括安全性较差(有机电解液)、电位窗口窄(水系电解液)、离子电导率相对较低(固体电解质)、成本高(离子液体电解液)等,讨论了新型电解液的改性设计和解决方案。本综述的目的是阐述电解液在PIBs中的重要性,探究当前和新兴的PIBs电解液的应用潜力,并对电解液未来发展提出了一些建议和前景。

关键词: 钾离子电池, 有机电解液, 水系电解液, 离子液体电解液, 固体电解质

Abstract:

Owing to the abundant resources, low cost, environmental friendliness and high energy density, Potassium ion batteries (PIBs) become an ideal novel energy storage system to replace the lithium ion batteries (LIBs). Although remarkable progress has been made in the research of PIBs in the field of electrodes in recent years, the research of electrolytes for potassium ion batteries is still in its infancy, and its design and application face many challenges, such as serious side reactions between electrolytes and electrodes, unstable solid-liquid interfaces and low Coulombic efficiency. Therefore, the development of an excellent electrolyte is the key to realize industrial application of PIBs. Herein, we review the characteristics and research progress of PIBs electrolytes in recent years. Firstly, we focus on the development status and prospect of four mainstream electrolytes, such as organic electrolyte, aqueous electrolyte, ionic liquid electrolyte and solid electrolyte. Ester-based electrolyte and ether-based electrolyte in organic electrolyte are emphatically introduced. The key problems faced by PIBs electrolyte at present are summarized, including poor safety (organic electrolyte), narrow potential window (aqueous electrolyte), low ionic conductivity (solid electrolyte) and high cost (ionic liquid electrolyte). And discuss the modification design and solutions of new electrolytes. The review purposes to expound the importance of electrolytes in PIBs, explores the application potential of current and emerging PIBs electrolytes, and puts forward some suggestions and prospects for the future development of electrolytes.

Key words: potassium ion battery, organic electrolyte, aqueous electrolytes, ionic liquid electrolyte, solid electrolyte

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