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题名: Effects of phosphate additives on the stability of positive electrolytes for vanadium flow batteries
作者: Ding, Cong1, 2;  Ni, Xiao2, 3;  Li, Xianfeng1;  Xi, Xiaoli1, 2;  Han, Xiuwen3;  Bao, Xinhe3;  Zhang, Huamin1
关键词: Energy storage ;  Vanadium flow batteries ;  Precipitate ;  Phosphate additives ;  Capacity retention
刊名: ELECTROCHIMICA ACTA
发表日期: 2015-05-01
DOI: 10.1016/j.electacta.2015.02.187
卷: 164, 页:307-314
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: A series of phosphates is investigated as additives to improve the stability of the electrolyte for vanadium flow battery (VFB). Two selected additives show positive effect on the stability of electrolytes under ex-situ stability tests and in situ flow cell experiments. The effects of additives on electrolyte are studied by Nuclear magnetic resonance (NMR), X-ray diffraction (XRD), Raman spectroscopy, Cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS) and charge-discharge test. The results show that a VFB using the electrolyte with NH(4)H(2)PO(4)additive demonstrates significantly improved redox reaction reversibility and activity, and higher energy efficiency. In addition, the cell employing the electrolyte with NH4H2PO4 exhibits a charge capacity fading rate much slower than the cell without additives during the cycling at high temperature. These results indicate that the phosphate additives are highly beneficial to improving the stability and reliability of VFB. (C) 2015 Elsevier Ltd. All rights reserved.
关键词[WOS]: REDOX BATTERY ;  ELECTROCHEMICAL-BEHAVIOR ;  ORGANIC ADDITIVES ;  ENERGY-STORAGE ;  V(V) ELECTROLYTE ;  CELL ELECTROLYTE ;  ACID ;  PYROPHOSPHATE ;  PRECIPITATION ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000352499000037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146153
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, Div Energy Storage, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Ding, Cong,Ni, Xiao,Li, Xianfeng,et al. Effects of phosphate additives on the stability of positive electrolytes for vanadium flow batteries[J]. ELECTROCHIMICA ACTA,2015,164:307-314.
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