Insights into novel indium catalyst to kW scale low cost,high cycle stability of iron-chromium redox flow battery  

作　　者：Yingchun Niu Yinping Liu Tianhang Zhou Chao Guo Guangfu Wu Wenjie Lv Ali Heydari Bo Peng Chunming Xu Quan Xu 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(Beijing),Beijing,102249,China [2]Department of Applied Physics,Aalto University,FI-00076,Aalto,Finland

出　　处：《Green Energy & Environment》2025年第2期410-421,共12页绿色能源与环境(英文版)

基　　金：support from the National Natural Science Foundation of China(No.22308378,22308380,22393963);the Science Foundation of China University of Petroleum,Beijing(No.2462023XKBH005,ZX20230078).

摘　　要：Iron-chromium flow batteries(ICRFBs)have emerged as an ideal large-scale energy storage device with broad application prospects in recent years.Enhancement of the Cr^(3+)/Cr^(2+)redox reaction activity and inhibition of the hydrogen evolution side reaction(HER)are essential for the development of ICRFBs and require a novel catalyst design.However,elucidating the underlying mechanisms for modulating catalyst behaviors remains an unresolved challenge.Here,we show a novel precisely controlled preparation of a novel thermal-treated carbon cloth electrode with a uniform deposit of low-cost indium catalyst particles.The density functional theory analysis reveals the In catalyst has a significant adsorption effect on the reactants and improves the redox reaction activity of Cr^(3+)/Cr^(2+).Moreover,H+is more easily absorbed on the surface of the catalyst with a high migration energy barrier,thereby inhibiting the occurrence of HER.The assembled ICRFBs have an average energy efficiency of 83.91%at 140 mA cm^(-2),and this method minimizes the electrodeposition process and cleans the last obstacle for industry long cycle operation requirements.The ICRFBs exhibit exceptional long-term stability with an energy efficiency decay rate of 0.011%per cycle at 1000 cycles,the lowest ICRFBs reported so far.Therefore,this study provides a promising strategy for developing ICRFBs with low costs and long cycle life.

关 键 词：Iron-chromium flow batteries In catalyst Hydrogen evolution side reaction Cycle stability Industry usage 

分 类 号：O64[理学—物理化学]