Effect of Trolamine on the Positive Electrolyte  for Vanadium Redox Flow Batteries

doi:10.3969/j.issn.1007-2985.2013.03.013

Abstract

Abstract: Trolamine was used as the additive of positive electrolyte for vanadium redox flow battery.Its electrochemical performance of V(IV)/VV(V) redox couple and thermal stability of V(V) electrolyte were investigated by stabilization examination,UV-Vis absorption spectrophotometry,cyclic voltammetry and charge-discharge test.The results show that addition of trolamine can enhance thermal stability of V(V),and the concentration of V(V) at 50 ℃ for 12 h can reach 1.08 mol/L,0.16 higher than the pristine.The UV-Vis spectra show that trolamine do not change the bonding style of vanadium ion.The addition of trolamine can enhance the electrochemical acitivity and reversibility,with larger peak current and smaller peak potential interval.The average energy efficiency of 30 cycles assembled with trolamine is 80.4%,1.4% higher than that of the pristine.

Key words: vanadium redox flow battery, electrolyte, additive, trolamine

HE Zhang-Xing, HE Yao-Yi, CHEN Chen, YANG Shuai, CHEN Wen-Cong, LIU Su-Qin, HE Zhen. Effect of Trolamine on the Positive Electrolyte for Vanadium Redox Flow Batteries[J]. journal6, 2013, 34(3): 62-65.

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Effect of Trolamine on the Positive Electrolyte for Vanadium Redox Flow Batteries

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