文献类型：期刊文献

英文题名：Vanadium Hexacyanoferrate Prussian Blue Analogs for Aqueous Proton Storage: Excellent Electrochemical Properties and Mechanism Insights

作者：Yang, Jun[1];Hou, Wenxiu[1];Ye, Lingqian[1];Hou, Guoyu[2];Yan, Chao[1];Zhang, Yu[2]

机构：[1]Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：20

期号：2

外文期刊名：SMALL

收录：;EI(收录号：20233614682120);WOS:【SCI-EXPANDED(收录号:WOS:001058468000001)】；

基金：The authors greatly acknowledge the funding for this project through the National Natural Science Foundations of China (51873083 and 22109044), the China Postdoctoral Science Foundation (2022M711686), the Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX21_3455), and the Natural Science Foundation of Shanghai, China (22ZR1418500).

语种：英文

外文关键词：cathodes; energy storage; proton batteries; Prussian blue analogues; reaction mechanism

摘要：The significant attraction toward aqueous proton batteries (APBs) is attributable to their expedited kinetics, elevated safety profile, and economical feasibility. Nevertheless, their practical implement is significantly blocked by the unsatisfactory energy density due to the limited cathode materials. Herein, vanadium hexacyanoferrate Prussian blue analog (VOHCF) is introduced as a potentially favorable cathode material for APBs. The findings demonstrate that this VOHCF electrode exhibits a notable reversible capacity of 102.7 mAh g-1 and exceptional cycling stability, with 95.4% capacity retention over 10 000 cycles at 10 A g-1. It is noteworthy that this is the detailed instance of VOHCF being proposed as a cathode for APBs. Combining the in situ characterization techniques and theoretical simulations, the origins of excellent proton storage performance are revealed as the multiple redox mechanisms with double active centers of C & EQUIV;N group and VO bond in VOHCF as well as the robust structure stability. A proton full cell with excellent performance is further achieved by coupling the VOHCF cathode and diquinoxalino[2,3-a:2 & PRIME;,3 & PRIME;-c] phenazine (HATN) anode, demonstrating the great potential of VOHCF in practical applications. This work could provide fundamental understanding to the development of feasible cathode materials for proton storage device. The vanadium hexacyanoferrate Prussian blue analog (VOHCF) prepared via one step co-precipitation approach possesses double active sites of traditional C & EQUIV;N group in PBAs and VO bond, which makes full use of the redox activity, favoring the electrochemical performance in aqueous half and full proton batteries in terms of high specific capacity and stability.image