Ultrafine SnO_(2)in situ modified graphite felt derived from metal-organic framework as a superior electrode for vanadium redox flow battery  

作　　者：Qing-Chun Jiang Jin Li Yu-Jie Yang Yu-Jie Ren Lei Dai Jia-Yi Gao Ling Wang Jia-Ye Ye Zhang-Xing He 

机构地区：[1]School of Chemical Engineering,North China University of Science and Technology,Tangshan,063009,China [2]Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment,North China University of Science and Technology,Tangshan,063009,China [3]Faculty of Science,School of Chemistry and Physics,Queensland University of Technology,Brisbane,QLD,4001,Australia [4]Center for Materials Science,Queensland University of Technology,Brisbane,QLD,4001,Australia

出　　处：《Rare Metals》2023年第4期1214-1226,共13页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51872090 and 51772097);Hebei Natural Science Fund for Distinguished Young Scholar(No.E2019209433);the Youth Talent Program of Hebei Provincial Education Department(No.BJ2018020);the Natural Science Foundation of Hebei Province(No.E2020209151)。

摘　　要：Metal-organic framework(MOF)and its derivatives have low-cost,controllable structure,and good catalytic performance,which are often used in the electrochemical field.In this work,SnO_(2)in situ modified graphite felt(SnO_(2)/GF)is prepared by hydrothermal method then simple thermal treatment using Sn-based MOF(Sn-MOF)as precursor.SnO_(2)is uniformly and firmly distributed on the GF surface rather than the common agglomeration and poor bonding of metal oxides on carbon-based electrodes,providing stable active centers for the VO^(2+)/VO_(2)^(+)and V^(2+)/V^(3+)redox reactions.At250 mA·cm^(-2),the energy efficiency of the battery with SnO_(2)/GF remains at 63.2%,while the blank one has failed.The former battery,at 100 mA·cm^(-2),has higher energy efficiency and good cycle stability(over 200 cycles).The battery performance of this study is better than that of most previous report in metal oxide-related work.This work obtains high-performance composite electrode by simple treatment of MOF,which provides a reference for the application of MOF in vanadium redox flow battery.

关 键 词：Vanadium redox flow battery(VRFB) Composite electrode Metal-organic framework(MOF) In situ SnO_(2) 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工]