Commercial Prussian blue: A highly efficient host for sodium storage

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2020-08, Vol.870, p.114263, Article 114263
• Main Authors: Xiao, Chengxiang, Xia, Maoting, Zhang, Xikun, Yu, Haoxiang, Bi, Wenchao, Long, Nengbing, Shui, Miao, Shu, Jie
• Format: Article
• Language: English
• Subjects: Cathode material; Cycles; Electrochemical characterization; Electrode materials; Industrial applications; Pigments; Prussian blue; Rechargeable batteries; Sodium host; Sodium-ion batteries; Stability
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2020.114263

Prussian blue (PB, Fe4[Fe(CN)6]3) as a mature material in both fundamental studies and industrial applications has attracted increasingly attention in promoting the commercial applications of sodium-ion batteries (SIBs) due to its excellent cycling stability. In this work, commercial PB after water removal is firstly applied to be a cathode material for sodium storage. Then various electrochemical methods are employed to characterize its properties in SIBs. The results indicate that PB achieves a capacity of 100.2 mAh g−1 in the initial cycle at 50 mA g−1, and the retention rate can reach 92.5% after 200 cycles, suggesting the good cycling stability with small capacity loss. Even at 400 mA g−1, the capacity maintains at 70.2 mAh g−1 with 81.9% retention after 400 cycles. From a practical viewpoint, the low-cost PB exhibits remarkable cycling stability and rate capability, which makes it possible to be utilized in the large-scale applications with typical practicality and commercial prospects. [Display omitted] •Commercial Prussian blue is treated with thermal treatment.•Prussian blue consists of numerous nanoparticles.•The electrochemical kinetics is investigated by CV analysis.•Prussian blue exhibits remarkable cycling stability and rate capability.