用于先进钒氧化还原液流电池的多孔石墨毡电极的制备

Preparation of a porous graphite felt electrode for advance vanadium redox flow batteries.

作者信息

Zhang Lei, Yue Junpei, Deng Qi, Ling Wei, Zhou Chun-Jiao, Zeng Xian-Xiang, Zhou Congshan, Wu Xiong-Wei, Wu YuPing

机构信息

College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology Yueyang Hunan 414006 China

School of Chemistry and Materials Science, Hunan Agricultural University Changsha Hunan 410128 China

出版信息

RSC Adv. 2020 Apr 1;10(23):13374-13378. doi: 10.1039/d0ra00666a.

DOI:10.1039/d0ra00666a

PMID:35493023

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9051378/

Abstract

Rapid mass transfer and great electrochemical activity have become the critical points for designing electrodes in vanadium redox flow batteries (VRFBs). In this research, we show a porous graphite felt (GF@P) electrode to improve the electrochemical properties of VRFBs. The generation of pores on graphite felt electrodes is based on etching effects of iron to carbon. The voltage and energy efficiencies of VRFB based on the GF@P electrode can reach 72.6% and 70.7% at a current density of 200 mA cm, respectively, which are 8.3% and 7.9% better than that of untreated GF@U (graphite felt). Further, the VRFBs based on GF@P electrodes possess supreme stability after over 500 charge-discharge cycles at 200 mA cm. The high-efficiency approach reported in this study offers a new strategy for designing high-performance electrode materials applied in VRFBs.

摘要

快速的质量传递和良好的电化学活性已成为设计全钒液流电池（VRFBs）电极的关键点。在本研究中，我们展示了一种多孔石墨毡（GF@P）电极，以改善全钒液流电池的电化学性能。石墨毡电极上孔隙的产生基于铁对碳的蚀刻作用。基于GF@P电极的全钒液流电池在电流密度为200 mA/cm²时，电压效率和能量效率分别可达72.6%和70.7%，比未处理的GF@U（石墨毡）分别提高了8.3%和7.9%。此外，基于GF@P电极的全钒液流电池在200 mA/cm²下经过500多次充放电循环后具有卓越的稳定性。本研究报道的高效方法为设计应用于全钒液流电池的高性能电极材料提供了一种新策略。