高等学校化学学报2025，Vol.46Issue(11)：102-113,12.DOI:10.7503/cjcu20250191
纳米结构Co-Nd-MOF/GO电极材料的制备及电化学性能
Synthesis and Electrochemical Performance of Nanostructured Co-Nd-MOF/GO Electrode Materials
摘要
Abstract
Vanadium redox flow batteries(VRFB)are considered to be one of the most promising technologies for large-scale energy storage,and the low energy efficiency of electrode materials at high current densities is one of the main constraints to the development of VRFB.However,modification and modification of the electrode materials can improve their energy efficiency and stability.In this study,neodymium-based metal-organic framework(Nd-MOF)was used as a precursor and transition metal cobalt was introduced for doping.Meanwhile,Co-Nd-MOF was made to bond with graphene oxide(GO)with high electrical conductivity through its oxygen-containing functional groups,and then a Co-Nd-MOF/GO-2 composite with excellent electrochemical performance was prepared by hydrothermal method and applied as an electrode material for modifying the blank carbon felts(CF)in the anode of VRFBs.The electrochemical test results demonstrated that Co-Nd-MOF/GO-2 had excellent electrocatalytic effect on the redox reaction of V2+/V3+,which could improve the voltage efficiency(VE)and energy efficiency(EE)of VRFBs.At 50 mA/cm2,the Co-Nd-MOF/GO-2 composite-modified electrode decreased the overpotential by 259.7 mV and increased the discharge capacity by 263 mA·h compared with CF,and increased the VE and EE by 9.2%and 10%,respectively,compared with CF at 140 mA/cm2.After cycling,the current density was tuned back to 50 mA/cm2,and the VE and EE almost had no attenuation.It was demonstrated that the doping of Co provided additional metal nodes and free holes,the composite of GO reduced the degree of agglomeration of MOF and provided more active sites for V2+/V3+,which facilitated charge transfer and ionic transfer,and the synergistic effect between GO and Co-Nd-MOF further led to the enhancement of the electrical conductivity of composite electrode materials.This study provides a practical approach to advance the further application of VRFB.关键词
金属有机框架/Co掺杂/氧化石墨烯/钒氧化还原液流电池/电催化活性Key words
Metal-organic framework/Co-doping/Graphene oxide/Vanadium redox flow battery/Electrocatalytic activity分类
化学引用本文复制引用
王德龙,邢世禄,李春丽,周楠,郝亚玲,霍蓉,李秀华,刘惠锋..纳米结构Co-Nd-MOF/GO电极材料的制备及电化学性能[J].高等学校化学学报,2025,46(11):102-113,12.基金项目
内蒙古自然科学基金(批准号:2023LHMS05020)和自治区直属高校基本科研业务费项目(批准号:JY20220042)资助. Supported by the Inner Mongolia Natural Science Foundation,China(No.2023LHMS05020)and the Basic Scientific Research Operating Expenses Project of Universities Directly Affiliated to the Autonomous Region,China(No.JY20220042). （批准号:2023LHMS05020）
