Non-aqueous vanadium acetylacetonate electrolyte for redox flow batteries

被引:246
作者
Liu, Qinghua [1 ,2 ,3 ]
Sleightholme, Alice E. S. [1 ]
Shinkle, Aaron A. [1 ]
Li, Yongdan [2 ,3 ]
Thompson, Levi T. [1 ]
机构
[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA
[2] Tianjin Univ, Sch Chem Engn, Tianjin Key Lab Catalysis Sci & Technol, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Sch Chem Engn, State Key Lab Chem Engn, Tianjin 300072, Peoples R China
关键词
Vanadium acetylacetonate; Redox flow battery; Non-aqueous electrolyte; Organic; Energy-storage; MEMBRANE; CELL; COMPLEXES;
D O I
10.1016/j.elecom.2009.10.006
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The electrochemistry of a single-component redox flow battery employing vanadium(ill) acetylacetonate in acetonitrile and tetraethylammonium tetrafluoroborate has been investigated. The electrode kinetics of the anodic and cathodic reactions were studied using cyclic voltammetry. The V(II)/V(III) and V(III)/V(IV) couples were quasi-reversible and together yielded a cell potential of 2.2 V. The diffusion coefficient for vanadium acetylacetonate was estimated to be in the range of 1.8-2.9 x 10(-6) cm(2) s(-1) at room temperature. The charge-discharge characteristics of this system were evaluated in an H-type glass cell, and coulombic efficiencies near 50% were achieved. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:2312 / 2315
页数:4
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