储能科学与技术2025，Vol.14Issue(2)：488-496,9.DOI:10.19799/j.cnki.2095-4239.2024.0893
全钒液流电池碳毡电极的热处理活化研究
Study on thermal treatment activation of carbon felt electrode for all-vanadium flow batteries
摘要
Abstract
Vanadium flow battery(VFB)is imperative long-term energy storage technology for the development of low-carbon power systems.Developing high-power stacks is an important way to promote the scale application of VFB.Electrode,as a crucial material in a VFB power unit,is the key to realize high-power battery technology.To enhance the electrochemical performance of commercial carbon felt electrodes,two thermal treatment activation strategies are proposed in this work:low-temperature long-time treatment and high-temperature short-time treatment.Specifically,in the air atmosphere,pristine carbon felts are activated by adjusting the processing temperature and time.Physical,chemical,and electrochemical properties of activated electrodes are characterized using scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectroscopy,contact angle measurement,cyclic voltammetry,electrochemical impedance spectroscopy and single-cell charge-discharge tests.Results indicate that low-temperature long-time treatment controllably increases carbon felt fiber roughness,and preserves mechanical stability while introducing oxygen functional groups with minimal impact on the graphite crystal structure.After thermal treatment at 450℃for 6 h,the activated carbon felt exhibits the best electrochemical activity for VO2+/VO2+and V2+/V3+reactions.The BET surface area increases to 1.75 m2/g,and the content of oxygen functional groups on the surface increases to 10.38%(atomic percentage).Optimized activated carbon felt electrodes exhibit 77.8%energy efficiency at 300 mA/cm2,surpassing pristine carbon felt.This study offers practical guidance for activating commercial carbon felt electrodes.It is of great practical significance for the development of high power VFB.关键词
全钒液流电池/电极/碳毡/热处理/活化Key words
all-vanadium flow battery/electrode/carbon felt/thermal treatment/activation分类
信息技术与安全科学引用本文复制引用
王泓,张开悦..全钒液流电池碳毡电极的热处理活化研究[J].储能科学与技术,2025,14(2):488-496,9.基金项目
国家自然科学基金(22309121),辽宁省自然科学基金(2024-BS-118),辽宁省属本科高校基本科研业务费专项(LJ212410144035). （22309121）
