三乙醇胺对全钒液流电池正极电解液的影响

doi:10.3969/j.issn.1007-2985.2013.03.013

journal6 ›› 2013, Vol. 34 ›› Issue (3): 62-65.DOI: 10.3969/j.issn.1007-2985.2013.03.013

三乙醇胺对全钒液流电池正极电解液的影响

（中南大学化学化工学院，湖南长沙 410083）

出版日期:2013-05-25 发布日期:2013-07-18
通讯作者: 何震（1984-），男，湖南长沙人，中南大学化学化工学院副教授，主要从事新能源、电化学研究.
作者简介:何章兴（1985-），男，湖南浏阳人，博士在读，主要从事全钒液流电池电解液研究.
基金资助:
国家自然科学基金资助项目（51072234）；中南大学大学生创新训练项目（CL12136）

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

(School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)

Online:2013-05-25 Published:2013-07-18

摘要/Abstract

摘要：通过热稳定性考察、紫外-可见吸收光谱、循环伏安和充放电测试，研究了三乙醇胺作为全钒液流电池正极电解液添加剂对电化学活性和5价钒电解液热稳定性的影响.实验结果表明，三乙醇胺对电解液的热稳定性有较大的提高，5价钒离子浓度在50 ℃下保存12 h后仍有1.08 mol/L，高于空白电解液的0.16 mol/L.由可紫外-可见吸收光谱可知，三乙醇胺的加入没有改变钒的成键方式.同时，三乙醇胺对正极电解液的电化学活性和可逆性也有提高，有更高的峰电流和更小的峰电位差，组装的电池前30个循环平均能量效率可达80.4%，高于空白电池的1.4%.

关键词： 全钒液流电池, 电解液, 添加剂, 三乙醇胺

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

何章兴, 贺尧毅, 陈辰, 杨帅, 陈文聪, 刘素琴, 何震. 三乙醇胺对全钒液流电池正极电解液的影响[J]. journal6, 2013, 34(3): 62-65.

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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三乙醇胺对全钒液流电池正极电解液的影响

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

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