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题名: Studies on iron (Fe3+/Fe2+)-complex/bromine (Br-2/Br-) redox flow cell in sodium acetate solution
作者: Wen, YH;  Zhang, HM;  Qian, P;  Zhou, HT;  Zhao, P;  Yi, BL;  Yang, YS
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
发表日期: 2006
DOI: 10.1149/1.2186040
卷: 153, 期:5, 页:A929-A934
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Materials Science, Coatings & Films
研究领域[WOS]: Electrochemistry ;  Materials Science
英文摘要: The formal potential of the Fe(III)/Fe(II) couple shifts markedly in the negative direction by complexation with ethylenediamine tetraacetate (EDTA), oxalate, and citrate. The potentials of the complexes with EDTA and oxalate are less pH-dependent than with citrate. But, the relatively high pH of around 6.0 is favorable electrochemically due to high corresponding currents. Complexation of Fe(III)/Fe(II) couple can provide fast electrode kinetics except for the complex with citrate. But, the solubility of the complex with citrate is up to 0.8 M. Charge-discharge measurements were conducted with the iron-complex/Br-2 redox cells. The results show that performance of the cells with 0.1 M Fe(III)/Fe(II)-oxalate or Fe(III)/Fe(II)-citrate is relatively poor due to slow kinetics for the Fe(III)/Fe(II)-citrate and the unstability of the ferric form for the Fe(III)/Fe(II)-oxalate, whereas performance of the iron-citrate/Br-2 cell is improved considerably by increasing concentration of the Fe(III)-citrate complex. Also, energy efficiencies of up to approximately 80 and 70% could be obtained for the cell with 0.1 M Fe(III)/Fe(II)-EDTA and 0.8 M Fe(III)/Fe(II)-citrate, respectively. The preliminary study shows that novel Br-2/iron-complex cells are technically feasible in redox flow batteries but need further investigation. (c) 2006 The Electrochemical Society.
关键词[WOS]: ELECTROCHEMICAL ENERGY-STORAGE ;  PHOTOVOLTAIC SYSTEMS ;  BATTERIES ;  COUPLES ;  PHENANTHROLINE ;  PERFORMANCE ;  COMPLEXES ;  LIGANDS
语种: 英语
WOS记录号: WOS:000236516000021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140097
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.Chinese Acad Sci, Dalian Inst Chem Phys, Full Cell R&D Ctr, Dalian 116023, Liaoning, Peoples R China
2.Res Inst Chem Def, Beijing 100083, Peoples R China

Recommended Citation:
Wen, YH,Zhang, HM,Qian, P,et al. Studies on iron (Fe3+/Fe2+)-complex/bromine (Br-2/Br-) redox flow cell in sodium acetate solution[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2006,153(5):A929-A934.
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