期刊
JOURNAL OF POWER SOURCES
卷 271, 期 -, 页码 556-560出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.08.029
关键词
Vanadium redox flow batteries; Reference electrode; Operando conditions; Electrode kinetics; Ammoxidized graphite felts
资金
- European Regional Development Funds (ERDF-FEDER Programa Competitivitat de Catalunya)
- Ministerio de Economia y Competitividad-INNPACTO [IPT-2011-1690- 920000]
In-depth evaluation of the electrochemical performance of all-vanadium redox flow batteries (VREBs) under operando conditions requires the insertion of a reliable reference electrode in the battery cell. In this work, an easy-to-make reference electrode based on silver silver sulfate is proposed and described for VRFBs. The relevance and feasibility of the information obtained by inserting the reference electrode is illustrated with the study of ammoxidized graphite felts. In this case, we show that the kinetic of the electrochemical reaction VO2+/VO2+ is slower than that of V2+/V3+ at the electrode. While the slow kinetics at the positive electrode limits the voltage efficiency, the operating potential of the negative electrode, which is outside the stability widow of water, reduces the coulombic efficiency due to the hydrogen evolution. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据