首页 | 本学科首页   官方微博 | 高级检索  
     

三乙醇胺对全钒液流电池正极电解液的影响
引用本文: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]. 吉首大学学报(自然科学版), 2013, 34(3): 62-65. DOI: 10.3969/j.issn.1007-2985.2013.03.013
作者姓名:何章兴  贺尧毅  陈辰  杨帅  陈文聪  刘素琴  何震
作者单位:(中南大学化学化工学院,湖南 长沙 410083)
基金项目: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)
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12h后仍有1.08mol/L,高于空白电解液的0.16mol/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

Effect of Trolamine on the Positive Electrolyte for Vanadium Redox Flow Batteries
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]. Journal of Jishou University(Natural Science Edition), 2013, 34(3): 62-65. DOI: 10.3969/j.issn.1007-2985.2013.03.013
Authors:HE Zhang-xing  HE Yao-yi  CHEN Chen  YANG Shuai  CHEN Wen-cong  LIU Su-qin  HE Zhen
Affiliation:(School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)
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.
Keywords:vanadium redox flow battery  electrolyte  additive  trolamine
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《吉首大学学报(自然科学版)》浏览原始摘要信息
点击此处可从《吉首大学学报(自然科学版)》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号