Effect of Addictives on Anolyte for Vanadium Flow Battery

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Abstract

Tartaric acid, oxalic acid, citric acid, and glucose are explored as additives in anolyte for vanadium redox battery(VRB), respectively. The effects of additives on anolyte are studied by cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS) and stability test. The CV results indicate that glucose, which is one of the poly-hydroxy organic compounds, can improve oxidation peak current; oxalic acid containing multiple-carboxyl can improve reduction peak current; tartaric acid, which contain both poly-hydroxy and multiple-carboxyl, can both improve oxidation peak current and reduction peak current. Meanwhile tartaric acid can enhance the stability of V⁵⁺, which may due to the interaction between tartaric acid and vanadium ion. The EIS results indicate that the electrochemical activity of anolyte is improved by adding tartaric acid, which can reduce charge transfer resistance and solution resistance.

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	Articles by authors
	Qian Cheng
	Wang Wei

Keywords： vanadium battery； additive； electrochemical activity； stability

Received 2014-04-20;

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Cite this article:

Qian Cheng, Wang Wei.Effect of Addictives on Anolyte for Vanadium Flow Battery[J] Chemcial Industry and Engineering, 2016,V33(2): 65-69

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