Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect

doi:10.1149/1945-7111/abf037

IMR OpenIR

	Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect
	Jing,Minghua 1,2; Xu,Zeyu 2; Fang,Dawei 1; Fan,Xinzhuang 2; Liu,Jianguo 2; Yan,Chuanwei 2
通讯作者	Fan,Xinzhuang()
	2021-03-01
发表期刊	Journal of The Electrochemical Society
ISSN	0013-4651
卷号	168 期号:3
摘要	Aiming at the shortcoming of low specific surface area of the most commonly used carbon felt (CF) electrodes in vanadium flow battery (VFB), there are mainly two approaches to enhancing its specific surface area: anchoring effect and digging effect. Based on the digging effect, the CO2-etched CF has been fabricated by a simple heat treatment under the CO2 atmosphere. As expected, lots of etch pits are formed and evenly distribute on the fiber surface, indicating a greatly enhanced surface area. Meanwhile, the content of O in the CO2-etched CF increases obviously, meaning the formation of more oxygen-containing groups, which are conducive to the improvement of hydrophilicity and electrochemical surface area. Furthermore, the oxygen-containing groups newly generated during the CO2 etching process not only improve the hydrophilicity, but also enhance the electrocatalytic activity toward to the V3+/V2+ redox couples. Consequently, VFB with CO2-etched CF as its electrodes presents significantly improved energy conversion efficiencies, discharge capacity and cycling stability. This work supplies a convenient and efficient way to improve the VFB performance by enhancing the specific surface area of CF electrodes through digging effect.
关键词	Vanadium flow battery CO2 etching Surface area Electrocatalytic activity Battery performance
DOI	10.1149/1945-7111/abf037
语种	英语
WOS记录号	IOP:0013-4651-168-3-abf037
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/159284
专题	中国科学院金属研究所
通讯作者	Fan,Xinzhuang
作者单位	1.Institute of Rare and Scattered Elements, College of Chemistry, Liaoning University, Shenyang, 110036, People’s Republic of China 2.Liaoning Engineering Research Center for Advanced Battery Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China
推荐引用方式 GB/T 7714	Jing,Minghua,Xu,Zeyu,Fang,Dawei,et al. Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect[J]. Journal of The Electrochemical Society,2021,168(3).
APA	Jing,Minghua,Xu,Zeyu,Fang,Dawei,Fan,Xinzhuang,Liu,Jianguo,&Yan,Chuanwei.(2021).Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect.Journal of The Electrochemical Society,168(3).
MLA	Jing,Minghua,et al."Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect".Journal of The Electrochemical Society 168.3(2021).