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题名: Bifunctional redox flow battery-1 V(III)/V(II)-glyoxal(O-2) system
作者: Wen, Y. H.1;  Cheng, J.1, 2;  Ma, P. H.3;  Yang, Y. S.1, 2
关键词: bifunctional redox flow battery ;  organic electro-synthesis ;  glyoxal ;  V(III)/V(II) ;  separator
刊名: ELECTROCHIMICA ACTA
发表日期: 2008-03-20
DOI: 10.1016/j.electacta.2007.11.073
卷: 53, 期:9, 页:3514-3522
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Bifunctional redox flow batteries (BRFB) possess functions of both electricity storage and electrochemical preparation, having the potential for increasing the electrical energy utilization. A V(III)/V(II)-glyoxal(O-2) system has been developed. Separators of the BRFB play a key role in BRFB performance. A Nation solution was sprayed on a gas diffusion layer (GDL) at the Nafion loading of 2 mg cm(-2), and the GDL was then hot-pressed onto a Nafion 115 cation exchange membrane, obtaining a modified separator. This separator not only prevents the crossover of vanadium but also has favorable conductivity, obtaining optimal charge and organic electro-synthesis performance of the BRFB. The effects of the concentrations of glyoxal and HCl on the performance of BRFB were also investigated. It is shown that the optimal concentration of glyoxal and HCl should be 1.2 and 3 M, respectively. As a result, the current efficiency of organic electro-synthesis is further increased. An acceptable discharge performance is achieved for a period exceeding 20 h at the current density of 20 mA cm(-2). The average discharge voltage of 0.73 V and the coulombic efficiency of 66% are obtained. It is demonstrated that the principle of the BRFB is feasible. However, further experiments are needed to improve the performance. (c) 2007 Elsevier Ltd. All rights reserved.
关键词[WOS]: PHOTOVOLTAIC SYSTEMS ;  EXCHANGE MEMBRANES ;  ENERGY ANALYSIS ;  TRANSPORT
语种: 英语
WOS记录号: WOS:000254375600010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140941
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Res Inst Chem Def, Beijing 100083, Peoples R China
2.Beijing Univ Sci & Technol, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Full Cell R&D Ctr, Dalian 116023, Peoples R China

Recommended Citation:
Wen, Y. H.,Cheng, J.,Ma, P. H.,et al. Bifunctional redox flow battery-1 V(III)/V(II)-glyoxal(O-2) system[J]. ELECTROCHIMICA ACTA,2008,53(9):3514-3522.
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