储能科学与技术 ›› 2022, Vol. 11 ›› Issue (2): 503-510.doi: 10.19799/j.cnki.2095-4239.2021.0383

• 储能材料与器件 • 上一篇    下一篇

MOFs及其衍生物在锂-氧气电池正极中的研究进展

贾林辉1,2(), 盖泽嘉3, 李沫汐3, 梁华根1,2()   

  1. 1.广东省新能源和可再生能源研究开发与应用重点实验室，广东 广州 510640
    2.中国矿业大学低碳能源研究院
    3.中国矿业大学信息与控制工程学院，江苏 徐州 221008
  • 收稿日期:2021-08-02 修回日期:2021-08-25 出版日期:2022-02-05 发布日期:2022-02-08
  • 通讯作者: 梁华根 E-mail:1320817491@qq.com;lianghg@cumt.edu.cn
  • 作者简介:贾林辉（1995—），男，硕士研究生，研究方向为锂-空气电池正极材料，E-mail：1320817491@qq.com；通讯
  • 基金资助:
    广东省新能源和可再生能源研究开发与应用重点实验室开放基金(E039kf0601);国家自然科学基金项目(21908242)

Research progress of MOFs and their derivatives as cathode catalysts for Li-O2 batteries

Linhui JIA1,2(), Zejia GAI3, Moxi LI3, Huagen LIANG1,2()   

  1. 1.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
    2.Low Carbon Energy Institute, China University of Mining and Technology
    3.School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China
  • Received:2021-08-02 Revised:2021-08-25 Online:2022-02-05 Published:2022-02-08
  • Contact: Huagen LIANG E-mail:1320817491@qq.com;lianghg@cumt.edu.cn

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摘要：

金属有机骨架材料(MOFs)及其衍生物因其灵活多变的化学组成和多孔结构等独特优点而成为锂-氧气(Li-O2)电池正极的候选催化剂。本文通过对近期相关文献的分析，综述了MOFs基催化剂的设计和合成策略，重点介绍了MOFs热解衍生碳基材料、MOFs衍生单原子催化剂以及原始MOFs材料在Li-O2电池中的应用，分析了MOFs及其衍生物对ORR/OER的催化机理。综合分析表明，构建具有高密度催化活性位点、结构稳定、孔隙率高、导电性良好的MOFs材料及其衍生物是今后开发高效Li-O2电池正极催化剂的发展方向。

关键词: 锂-氧气电池, 正极, 金属有机骨架材料, 双功能催化剂, 氧还原/氧析出

Abstract:

The huge demand for long-life power batteries and large-scale energy storage equipment has generated considerable interest in nonaqueous lithium-oxygen batteries (LOB), a promising next-generation rechargeable battery, due to their super-high energy density, low cost, and environmental friendliness. Although extensive research has been conducted in recent decades, issues such as low specific capacity, high discharge/charge overpotential, and poor cycle life remain the challenges for their real commercialization. These critical issues point to the cathode, the location of the electrochemical reaction. During discharge, insoluble insulating discharge products (Li2O2) are deposited on the surface of the cathode, obstructing the diffusion channels of oxygen and electrolyte and covering the catalytic active sites, resulting in the battery's discharge being prematurely terminated. In the charging process, the high charging potential causes the decomposition of carbon materials, electrolytes, and binders, further resulting in the formation of by-products and the rapid decline of battery cycle life. Therefore, the design and investigation of the cathode catalysts with dense pore structure, high conductivity, and high catalytic activity for oxygen reduction reaction and oxygen evolution reactions (ORR/OER), as well as acceptable chemical/electrochemical stability, remain challenging. Metal-organic frameworks (MOFs) and their derivatives are a class of candidate catalysts in Li-O2 batteries due to their flexible chemical composition, high specific surface area, and tailorable pore structure. The strategies discussed in this review include the use of MOF-derived carbon-based materials, MOF-derived single-atom catalysts, and pristine MOFs, which were successfully applied as high-performance cathode catalysts for Li-O2 batteries. Additionally, suggestions are offered for improving the ORR/OER catalytic activity by optimizing the properties of MOFs and their derivatives. Finally, the future research direction of MOFs as cathode catalysts for nonaqueous Li-O2 batteries is discussed.

Key words: Li-O2 battery, cathode, MOFs, bifunctional catalyst, ORR/OER

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