储能科学与技术 ›› 2023, Vol. 12 ›› Issue (11): 3340-3351.doi: 10.19799/j.cnki.2095-4239.2023.0467

• 储能材料与器件 • 上一篇    下一篇

钠离子电池普鲁士蓝材料结构构建及优化的研究进展

陈娜(), 李安琪, 郭子祥, 张钰哲, 秦学()   

  1. 天津大学理学院,天津 300350
  • 收稿日期:2023-07-06 修回日期:2023-07-29 出版日期:2023-11-05 发布日期:2023-11-16
  • 通讯作者: 秦学 E-mail:chenna_1@tju.edu.cn;qinxue@tju.cn
  • 作者简介:陈娜(2000—),女,硕士研究生,研究方向为钠离子电池,E-mail:chenna_1@tju.edu.cn

Research progress on the construction and optimization of Prussian blue material structure for sodium-ion batteries

Na CHEN(), Anqi LI, Zixiang GUO, Yuzhe ZHANG, Xue QIN()   

  1. School of Science, Tianjin University, Tianjin 300350, China
  • Received:2023-07-06 Revised:2023-07-29 Online:2023-11-05 Published:2023-11-16
  • Contact: Xue QIN E-mail:chenna_1@tju.edu.cn;qinxue@tju.cn

摘要:

由于钠资源丰富、成本低廉和分布广泛等优点,在锂离子电池的众多备选电池当中,钠离子电池重新成为研究热点。在现今主流的钠离子电池正极材料当中,相较于放电比容量不高的聚阴离子材料、充放电过程中频繁相变的层状氧化物材料以及易溶于电解液且自身导电性较差的有机正极材料来讲,普鲁士蓝及其类似物(PB和PBAs)因具有三维刚性开放骨架、理论比容量高、结构可调以及易于普及的合成方法等展现出非凡的潜力。然而在合成过程中不可避免地会在晶体中产生Fe(CN)6空位和配位水,限制了其在储能领域的进一步应用。针对上述问题,现今采用的主要手段为对体相进行优化提高晶体的质量,或者侧重于对晶体结构表面进行修饰增强界面稳定性等。本文从结构与性能的关系出发,首先讨论了PB及PBAs的基础结构及其构建方法。在此基础上,重点从调节制备方法、离子掺杂和特殊结构设计等三方面分析了PB及PBAs结构优化的策略,综述了PB和PBAs材料的最新改性研究进展。最后对其未来的发展前景进行了展望,以期为开发更高性能的PB及PBAs材料提供理论借鉴。

关键词: 钠离子电池, 普鲁士蓝类似物, 结构构建, 结构优化

Abstract:

Among the candidate batteries, sodium-ion batteries are in the spotlight because of their sufficient, low-cost, and widely distributed sodium resources. Layered transition metal oxides exhibit intrinsic structural instability owing to multiple phase changes. The low theoretical capacity of polyanionic compounds restricts their future application, and organic cathode materials are easily dissolved in the electrolyte and have poor conductivity. Fortunately, Prussian blue and its analogs (PB and PBAs) cathode materials show extraordinary potential because of their three-dimensional rigid open framework, high theoretical specific capacity, adjustable structure, and facile synthesis. However, the Fe(CN)6 vacancies and coordination water inevitably generated in the crystal during synthesis limit its further application in energy storage. To solve the above problems, most researchers have optimized the intrinsic structure to improve the quality of the crystal or focused on modifying the surface to enhance the interface stability. Considering the structure-properties relationship, this paper first discusses the PB and PBAs' chemical composition and crystal structure. On this basis, strategies for optimizing the structure of PB and PBAs were analyzed from three aspects: material synthesis, ion doping, and unique structure design. In addition, the latest research progress on the modification of PB and PBA materials is elaborated. Moreover, the future development prospects are discussed, to provide a theoretical reference for developing higher-performance PB and PBAs materials.

Key words: sodium ion battery, prussian blue analogues, structure construction, structural optimization

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