Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (11): 3340-3351.doi: 10.19799/j.cnki.2095-4239.2023.0467

• Energy Storage Materials and Devices • Previous Articles     Next Articles

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

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

CLC Number: