Nanostructured Co-Nd-MOF/GO Electrode Materials: Synthesis and Electrochemical Performance

doi:10.7503/cjcu20250191

Chem. J. Chinese Universities

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Nanostructured Co-Nd-MOF/GO Electrode Materials: Synthesis and Electrochemical Performance

WANG Delong¹, XING Shilu¹, LI Chunli^1,2*, ZHOU Nan¹, HAO Yaling¹, HUO rong¹, LI Xiuhua¹, LIU Huifeng¹

1. Resource and Environmental Engineering College, Inner Mongolia University of Technology 2. Key Laboratory of Environmental Pollution Control and Restoration of Colleges and Universities in Autonomous Region

Received:2025-07-07 Revised:2025-09-15 Online First:2025-09-18 Published:2025-09-18
Contact: lichunli E-mail:lichunli16@163.com
Supported by:
Supported by the Inner Mongolia Natural Science Foundation, China(No. 2023LHMS05020) and the Basic Scientific Research Business Fee Project of Universities Directly Under the Autonomous Region, China(No.JY20220042)

1. ESM to 20250191.pdf(148KB)

Abstract

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, 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 mAcm-2, the Co-Nd-MOF/GO-2 composite-modified electrode decreased the overpotential by 259.7 mV and increased the discharge capacity by 263 mAh compared with CF, and increased the VE and EE by 9.2% and 10%, respectively, compared with CF at 140 mAcm-2, and after cycling, the current density was tuned back to 50 mAcm-2, and the VE and EE almost no attenuation.t 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.

Key words: Metal-organic framework, Co-doped, Graphene oxide, Vanadium redox flow battery; Electrocatalytic activity

CLC Number:

O646
TQ232

TrendMD:

WANG Delong, XING Shilu, LI Chunli, ZHOU Nan, HAO Yaling, HUO rong, LI Xiuhua, LIU Huifeng. Nanostructured Co-Nd-MOF/GO Electrode Materials: Synthesis and Electrochemical Performance[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20250191.

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Nanostructured Co-Nd-MOF/GO Electrode Materials: Synthesis and Electrochemical Performance

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