Carbon felt electrode coated with WS_(2)enables a high-performance polysulfide/ferricyanide flow battery  

作　　者：Liang-Yu Li Su Yan Ying-Jia Huang Fang-Fang Zhong Jin-Chao Cao Mei Ding Chuan-Kun Jia 

机构地区：[1]College of Materials Science and Engineering,Changsha University of Science and Technology,Changsha 410114,China [2]Institute of Energy Storage Technology,College of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China [3]Binzhou Institute of Technology,Weiqiao-UCAS Science and Technology Park,Binzhou 256606,China

出　　处：《Rare Metals》2024年第10期5039-5047,共9页稀有金属（英文版）

基　　金：financially supported by the NationalNatural Science Foundation of China(No.22209015);Scientific Research Foundation of Hunan Provincial Education Department(Nos.21A0195 and 21C0215);100 Talented Team of Hunan Province(No.XiangZu[2016]91)。

摘　　要：Polysulfide/ferricyanide flow batteries(S/Fe RFBs),with the advantages of abundant earth reservation low cost,high safety,and environmental friendliness,have attracted significant interest and demonstrated noteworthy potential for practical applications.However,the battery performance,including the energy efficiency(EE),voltage efficiency(VE),and power density of the S/Fe RFBs remains low owing to the slow redox kinetics of polysulfide ions.To address these concerns,WS_(2)was selected as the booster and deposited on a commercial carbon felt electrode(WS_(2)-CF)to stimulate the redox reactions of polysulfide ions.With better hydrophilicity and smaller charge-transfer resistance,WS_(2)-CF exhibits enhanced electrochemical activity toward polysulfide redox reactions.Consequently,the battery performance of S/Fe RFB with WS_(2)-CF as the anode has been improved,with EE of 84%,VE of 84%,and a peak power density of 175.7 mW·cm^(-2),which are all higher than the cell only with the bare carbon felt(CF)as electrodes(76%,77%and 155.8 mW·cm^(-2),respectively).Furthermore,the cycling life of the S/Fe RFB with WS_(2)-CF has been prolonged to 2200 cycles with a capacity retention of 96% a 40 mA·cm^(-2)because of the good stability of WS_(2)-CF as the anode.Contrarily,under the same conditions,the S/Fe RFB without WS_(2)-CF terminated after 1500 cycles with a fast capacity decay.The successful utilization of WS_(2)as a booster on an electrode provides an efficient strategy for obtaining advanced S/Fe RFBs for practical applications.

关 键 词：Tungsten disulfide Carbon felt Polysulfide/ferricyanide flow battery Energy storage 

分 类 号：TM912[电气工程—电力电子与电力传动]