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CeO2 embedded electrospun carbon nanofibers as the advanced electrode with high effective surface area for vanadium flow battery
Jing, MH; Zhang, XS; Fan, XZ; Zhao, LN; Liu, JG; Yan, CW; Zhao, LN (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Engn Res Ctr Adv Battery Mat, Shenyang 110016, Peoples R China.
2016-10-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume215Pages:57-65
AbstractAlthough electrospun carbon nanofibers (ECNFs) possess excellent conductivity, high surface area and good electrochemical activity toward vanadium redox couples, much surface area of ECNFs was still unutilized because of its poor hydrophilicity. CeO2 nanoparticles as an excellent hydrophilic agent are embedded in polyacrylonitrile (PAN) based carbon nanofibers by a simple electrospinning and subsequent carbonization process. The physicochemical characterizations show that the introduction of CeO2 nanoparticles slightly changes the structure and compositions of ECNFs, while the corresponding wettability is greatly improved. It is worth noting that the electrochemical surface area (ECSA) of CeO2/ECNFs is more than four times of that for ECNFs. According to the cyclic voltammograms (CV) and electrochemical impedance spectra (EIS) results, the addition of CeO2 improves the electrocatalytic activity toward the negative reaction of vanadium flow battery (VFB) to some extent while has less effect on that toward the positive reaction, the significant improvement in the electrochemical performance of CeO2/ECNFs might be mostly ascribed to the remarkable enhancement in ECSA. In addition, the charge/discharge tests further verify that CeO2/ECNFs with high ECSA could significantly reduces the electrochemical polarization during the discharging process and results in an enhanced discharge capacity and energy efficiency. The accomplishment of this work provides a new concept that it might be more convenient and effective to improve the electrochemical performance of the electrode materials for VFB by increasing their ECSA. (C) 2016 Elsevier Ltd. All rights reserved.
description.department[jing, minghua ; fan, xinzhuang ; zhao, lina ; liu, jianguo ; yan, chuanwei] chinese acad sci, inst met res, liaoning engn res ctr adv battery mat, shenyang 110016, peoples r china ; [zhang, xiaoshun] china criminal police coll, shenyang 110854, peoples r china
KeywordVanadium Flow Battery Cerium Oxide Nanoparticles Wettability Electrochemical Surface Area Electrochemical Performance
Subject AreaElectrochemistry
Funding OrganizationShenyang municipal science and technology plan projects [F16-205-1-19]; Shanghai key laboratory of crime scene evidence open topic [2014XCWZK10]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76248
Collection中国科学院金属研究所
Corresponding AuthorFan, XZ; Zhao, LN (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Engn Res Ctr Adv Battery Mat, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Jing, MH,Zhang, XS,Fan, XZ,et al. CeO2 embedded electrospun carbon nanofibers as the advanced electrode with high effective surface area for vanadium flow battery[J]. ELECTROCHIMICA ACTA,2016,215:57-65.
APA Jing, MH.,Zhang, XS.,Fan, XZ.,Zhao, LN.,Liu, JG.,...&Zhao, LN .(2016).CeO2 embedded electrospun carbon nanofibers as the advanced electrode with high effective surface area for vanadium flow battery.ELECTROCHIMICA ACTA,215,57-65.
MLA Jing, MH,et al."CeO2 embedded electrospun carbon nanofibers as the advanced electrode with high effective surface area for vanadium flow battery".ELECTROCHIMICA ACTA 215(2016):57-65.
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