全钒液流电池电极研究进展

doi:10.12028/j.issn.2095-4239.2018.0176

摘要/Abstract

摘要： 本文介绍了钒液流电池电极材料的研究现状。详细介绍了电极种类、电极材料的改性途径、改性效果，并对电极的老化机制进行了分析。全钒液流电池（VFB）电极材料改性的方法主要包括增加电极催化活性和增大电极电化学反应面积两种方式。通过对电极进行热处理、酸处理，可以改变电极表面结构，提高电极催化活性，从而提高电极反应可逆性。通过在电极表面生长碳纳米管或者负载石墨烯、氧化铱等而制备的复合电极材料，以及采用天然废弃物制备的多孔碳电极，可以达到同时提高电极表面催化活性和增大电极电化学反应面积的效果。还可以通过制备电极和双极板复合一体化电极，降低电池的接触电阻，减小电池极化。而电极的化学降解及电化学降解对于电极的寿命会产生影响，而且对电池负极的影响比正极更加明显。最后，总结了VFB电极材料的现状并展望了未来研究发展的方向。

关键词: 全钒液流电池, 储能, 电极材料, 石墨毡

Abstract: This paper presented a review on the study of electrode materials for vanadium redox flow battery(VFB), which covered the categories of electrode material, the methods of improving performance in electrode, research progress by modifications, and the aging mechanism of electrode. The methods of electrode modified were presented in detail. The results indicated that improvements of reactivity and active areas of electrode were both effective ways to optimize performance of electrode. Exposure electrodes to acid or heat treatment could increase the reversibility of electrode. Through growing CNTs on the electrode in situ, loading graphene or iridium oxide on surface of electrode, or using porous carbon electrodes prepared from natural waste, the electrodes could exhibit the higher electrochemistry active areas and reversibility at the same time. A practical means to combine bipolar plates with graphite felts as an integrative electrode could obviously reduce the contact resistance, which would benefit for decreasing the polarization voltage. In addition, the aging of electrode could effect on its' service life. The results showed that aging of electrode would have a worse impact on negative electrodes than that on positive electrodes. Finally the present situation and problem for VFB were summarized and the research direction of electrode materials for VFB was prospected.

Key words: vanadium flow redox battery, energy storage, electrode materials, graphite felt

中图分类号:

TK02

苏秀丽, 杨霖霖, 周禹, 林友斌, 余姝媛. 全钒液流电池电极研究进展[J]. 储能科学与技术, 2019, 8(1): 65-74.

SU Xiuli, YANG Linlin, ZHOU Yu, LIN Youbin, YU Shuyuan. Developments of electrodes for vanadium redox flow battery[J]. Energy Storage Science and Technology, 2019, 8(1): 65-74.

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