高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

纳米结构Co-Nd-MOF/GO电极材料的制备及电化学性能研究

王德龙1，邢世禄1，李春丽1,2，周楠1，郝亚玲1，霍蓉1，李秀华1，刘惠锋1


收稿日期: 2025-07-07. 网络首发日期: 2025-09-17.

联系人简介: 李春丽, 女, 博士, 副教授, 主要从事新能源方面的研究. E-mail: lichunli16@163.com。

基金项目: 内蒙古自然科学基金项目(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 Business Fee Project of Universities Directly Under the Autonomous Region, China(No.JY20220042).

  

  1. 1. 内蒙古工业大学资源与环境工程学院 2. 环境污染控制与修复自治区高等学校重点实验室
  • 收稿日期:2025-07-07 修回日期:2025-09-15 出版日期:2025-09-18 发布日期:2025-09-18
  • 通讯作者: 李春丽 E-mail:lichunli16@163.com
  • 基金资助:
    内蒙古自然科学基金项目(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

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

WANG Delong1, XING Shilu1, LI Chunli1,2*, ZHOU Nan1, HAO Yaling1, HUO rong1, LI Xiuhua1, LIU Huifeng1   

  1. 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: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)

PDF (PC)

补充材料

1

摘要： 钒氧化还原液流电池(VRFB)被认为是最具有前景的大规模储能技术之一，电极材料高电流密度下的低能量效率是制约VRFB发展的主要原因之一，然而对电极材料进行修饰改性可提高其能量效率和稳定性。本研究以钕基金属有机框架(Nd-MOF)为前驱体，引入过渡金属钴进行掺杂。同时，采用水热法使Nd-MOF与具有高导电性的氧化石墨烯(GO)通过GO的含氧官能团键合，制备出具有优异电化学性能的Co-Nd-MOF/GO-2复合材料，并将其作为修饰空白碳毡(CF)的电极材料应用于VRFB负极。电化学测试结果表明Co-Nd-MOF/GO-2对V2+/V3+的氧化还原反应具有优异的电催化作用，可以提高VRFBs的电压效率(VE)和能量效率(EE)。在50mAcm-2下，Co-Nd-MOF/GO-2复合材料修饰电极相较于CF过电位降低了259.7mV，放电容量提高了263mAh，在140mAcm-2时，相较于CF的VE和EE分别提高了9.2%和10%，循环之后电流密度调回50mAcm-2，VE和EE几乎无衰减，表现出良好的循环稳定性。事实证明，Co的掺杂提供了额外的金属节点和自由空穴，而GO的复合降低了MOF的团聚程度并为V2+/V3+反应提供了更多活性位点，从而促进了电荷转移和离子传递。这些效应，加之GO与Co-Nd-MOF之间的协同作用，共同显著提升了复合电极材料的导电性能。该研究为推进VRFB的进一步应用提供了一种可行的方法。

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

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

中图分类号: 

TrendMD: