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Improvement of the Battery Performance of Vanadium Flow Battery by Enhancing the Specific Surface Area of the Carbon Felt Electrodes: II. Digging Effect
Jing,Minghua1,2; Xu,Zeyu2; Fang,Dawei1; Fan,Xinzhuang2; Liu,Jianguo2; Yan,Chuanwei2
Corresponding AuthorFan,Xinzhuang()
2021-03-01
Source PublicationJournal of The Electrochemical Society
ISSN0013-4651
Volume168Issue:3
AbstractAiming 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.
KeywordVanadium flow battery CO2 etching Surface area Electrocatalytic activity Battery performance
DOI10.1149/1945-7111/abf037
Languageen
WOS IDIOP:0013-4651-168-3-abf037
PublisherIOP Publishing
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159284
Collection中国科学院金属研究所
Corresponding AuthorFan,Xinzhuang
Affiliation1.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
Recommended Citation
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).
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