Towards understanding the poor thermal stability of V5+ electrolyte solution in Vanadium Redox Flow Batteries

被引：190

作者：

Vijayakumar, M. ^{[1
]}

Li, Liyu ^{[1
]}

Graff, Gordon ^{[1
]}

Liu, Jun ^{[1
]}

Zhang, Huamin ^{[2
]}

Yang, Zhenguo ^{[1
]}

Hu, Jian Zhi ^{[2
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 07期

关键词：

O-17 and V-51 NMR; Vanadium Redox Flow Battery; Vanadium electrolytes; V2O5; precipitation; PRECIPITATION; PERFORMANCE; EQUILIBRIA;

D O I：

10.1016/j.jpowsour.2010.11.126

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The V5+ electrolyte solution from Vanadium Redox Flow Batteries was studied by variable temperature O-17 and V-51 Nuclear Magnetic Resonance (NMR) spectroscopy and density functional theory (DFT) based computational modeling. It was found that the V5+ species exist as hydrated penta co-ordinated vanadate ion, i.e. [VO2(H2O)(3)](1+). This hydrated structure is not stable at elevated temperature and change into neutral H3VO4 molecule via a deprotonation process and subsequently leading to the observed V2O5 precipitation in Vs electrolyte solutions. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3669 / 3672

页数：4

共 22 条

[1] Base C.F., 1976, The hydrolysis of cations
[2] Bühl M, 2001, CHEM-EUR J, V7, P4487, DOI 10.1002/1521-3765(20011015)7:20<4487::AID-CHEM4487>3.0.CO
[3] 2-G
[4] Protonation equilibria of mononuclear vanadate: Thermodynamic evidence for the expansion of the coordination number in VO2+[J]. Cruywagen, JJ;Heyns, JBB;Westra, AN. INORGANIC CHEMISTRY, 1996(06)
[5] The vanadium redox-battery:: an efficient storage unit for photovoltaic systems[J]. Fabjan, C;Garche, J;Harrer, B;Jörissen, L;Kolbeck, C;Philippi, F;Tomazic, G;Wagner, F. ELECTROCHIMICA ACTA, 2001(05)
[6] Formation equilibria of vanadium(V) species in different ionic media: Salt effect and protonation constant[J]. Gharib, Farrokh;Sayadian, Masumeh;Shame, Ali;Mobasher-Moghaddam, Maryam. JOURNAL OF MOLECULAR LIQUIDS, 2008(1-3)
[7] Greenwood N.N., 1998, CHEM ELEMENTS
[8] PROTOTROPIC CHARGE MIGRATION IN WATER .1. RATE CONSTANTS IN LIGHT AND HEAVY-WATER AND IN SALT SOLUTION FROM O-17 SPIN RELAXATION[J]. HALLE, B;KARLSTROM, G. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1983
[9] Jorgensen C.K., 1963, Inorganic Complexes
[10] Raman spectroscopy studies of concentrated vanadium redox battery positive electrolytes[J]. Kausar, N;Howe, R;Skyllas-Kazacos, M. JOURNAL OF APPLIED ELECTROCHEMISTRY, 2001(12)

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