Effect of L-glutamic acid on the positive electrolyte for all-vanadium redox flow battery

被引：61

作者：

Liang, Xinxing ^{[1
]}

Peng, Sui ^{[1
]}

Lei, Ying ^{[1
]}

Gao, Chao ^{[1
]}

Wang, Nanfang ^{[1
]}

Liu, Suqin ^{[1
]}

Fang, Dong ^{[2
]}

机构：

[1] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[2] Wuhan Text Univ, Coll Mat Sci & Engn, Minist Educ, Key Lab Green Proc & Funct Text NewText Mat, Wuhan 430073, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2013年 / 95卷

基金：

中国国家自然科学基金;

关键词：

L-Glutamic; All-vanadium redox flow battery; Positive electrolyte; Additive; OXYGEN REDUCTION REACTION; ENERGY-STORAGE; CARBON; PERFORMANCE; PROGRESS;

D O I：

10.1016/j.electacta.2013.01.138

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

L-Glutamic acid is used as an additive for the positive electrolyte of all-vanadium redox flow battery (VRFB), and its effect on the thermal stability and electrochemical activity is investigated. It is found that the addition of L-glutamic can significantly alleviate the precipitation of V2O5 from positive electrolyte. The conservation rate of V(V) ion can be as high as 58% after 2 M V(V) solution being kept in 40 degrees C for 89 h. Besides, L-glutamic can also improve the mass transport and electrochemical performance of anolyte. A high coulombic efficiency of over 95% and energy efficiency of 74% are obtained. XPS spectra illustrate that L-glutamic can react with the surface of carbon felt electrode and introduce more oxygen-containing and nitrogen-containing groups, which should be responsible for the improvement of electrochemical performance. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：80 / 86

页数：7

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