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The catalytic effect of bismuth for VO2+/VO2+ and V3+/V2+ redox couples in vanadium flow batteries
Yang, Xiaofei1,2; Liu, Tao1; Xu, Chi1,2; Zhang, Hongzhang1,3; Li, Xianfeng1,3; Zhang, Huamin1,3
KeywordVanadium Flow Battery Bismuth Catalysis Electrochemical Activity Energy Efficiency
Source PublicationJOURNAL OF ENERGY CHEMISTRY
2017
DOI10.1016/j.jechem.2016.09.007
Volume26Pages:1-7
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS KeywordGRAPHITE ELECTRODE MATERIALS ; POSITIVE ELECTRODE ; CARBON PAPER ; FELT ; PERFORMANCE ; CELL
AbstractThe effect of bismuth (Bi) for both VO2+/VO2+ and V3+/V2+ redox couples in vanadium flow batteries (VFBs) has been investigated by directly introducing Bi on the surface of carbon felt (CF). The results show that Bi has no catalytic effect for VO2+/VO2(+) redox couple. During the first charge process, Bi is oxidized to Bi3+ (never return back to Bi metal in the subsequent cycles) due to the low standard redox potential of 0.308 V (vs. SHE) for Bi3+/Bi redox couple compared with VO2+/VO2+ redox couple and Bi3+ exhibit no (or neglectable) electro-catalytic activity. Additionally, the relationship between Bi loading and electrochemical activity for V3+/V2+ redox couple was studied in detail. 2 wt% Bi-modified carbon felt (2%-BiCF) exhibits the highest electrochemical activity. Using it as negative electrode, a high energy efficiency (EE) of 79.0% can be achieved at a high current density of 160 mA/cm(2), which is 5.5% higher than the pristine one. Moreover, the electrolyte utilization ratio is also increased by more than 30%. Even the cell operated at 140 mA/cm(2) for over 300 cycles, the EE can reach 80.9% without obvious fluctuation and attenuation, suggesting excellent catalytic activity and electrochemical stability in VFBs. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
Language英语
WOS IDWOS:000401302600001
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/152250
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Yang, Xiaofei,Liu, Tao,Xu, Chi,et al. The catalytic effect of bismuth for VO2+/VO2+ and V3+/V2+ redox couples in vanadium flow batteries[J]. JOURNAL OF ENERGY CHEMISTRY,2017,26:1-7.
APA Yang, Xiaofei,Liu, Tao,Xu, Chi,Zhang, Hongzhang,Li, Xianfeng,&Zhang, Huamin.(2017).The catalytic effect of bismuth for VO2+/VO2+ and V3+/V2+ redox couples in vanadium flow batteries.JOURNAL OF ENERGY CHEMISTRY,26,1-7.
MLA Yang, Xiaofei,et al."The catalytic effect of bismuth for VO2+/VO2+ and V3+/V2+ redox couples in vanadium flow batteries".JOURNAL OF ENERGY CHEMISTRY 26(2017):1-7.
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