Corresponding Author

MENG Lin(lmeng@zbestpower.com)


It is extremely important for battery performance and safety in Zn-Br flow battery to use quaternary ammonium salts as complex agents for bromine. In this work, the effects of electrolyte compositions and concentrations on the electrode reactions and battery performances were studied in the absence and presences of N-methyl-N-ethyl-pyrrolidinium bromide (MEP) or N-methyl-N-butyl-pyrrolidinium bromide (MBP). The conductivities in the electrolytes containing different constitutions and concentrations were measured by EIS method. The charge-discharge performance for the battery and the complex ability for bromine in different electrolytes were also investigated. The results showed that the electrolyte containing MBP was better than that containing MEP for the battery performance and bromine complex ability.

Graphical Abstract


quaternary ammonium salt, MEP;MBP, Zn-Br flow batteries, bromine complex

Publication Date


Online Available Date


Revised Date


Received Date



[1] Song W J (宋文君). Preparation and Research of components and stack of Zn-Br redox flow battery[D].Dalian: DALIAN UNIVERSITY OF TECHNOLOGY(大连理工大学), 2013.

[2] Sun Y (孙钰).Preparation and Properties of the Membranes for Zn-Br Redox Flow Battery[D]. Dalian: DALIAN UNIVERSITY OF TECHNOLOGY(大连理工大学), 2015.

[3] Su H(苏杭). Research of the new type Zn-Br flow battery and related critical materials[D]. Dalian: DALIAN UNIVERSITY OF TECHNOLOGY(大连理工大学), 2014.

[4] He L (贺磊). Study on Zinc-deposition of Zn-Br flow battery[D]. Jilin:JILIN UNIVERSITY(吉林大学), 2009.

[5] Song W J (宋文君), Li M Q (李明强*), Su H (苏杭). Preparation and characterization of stack of Zn-Br flow battery[J]. Chinese Journal of Power Sources(电源技术研究与设计), 2015, 139(5): 963-967.

[6] Ji Y X (纪永新), Zhang L (张丽), Yang B (杨波), et al. Study on Safety of Battery Zinc Bromine Flow[J]. Industrial Control Computer (工业控制计算机), 2014, 27(10): 138-140.

[7] Meng L (孟琳). Recent progress in Zn-Br flow battery energy storage technologies[J]. Energy Storage Science and Technology (储能科学与技术), 2013, 2(1): 35-40.

[8] Zhang H M (张华民). Flow Battery Technology[M]. Beijing: Chemical Industry Press(化学工业出版社), 2014: 197.

[9] Chen X N (陈向楠). Research on the Determination of Bromide in Water [D].QingDao: OCEAN UNIVERSITY OF CHINA(中国海洋大学), 2013.

[10] Dou Y (窦妍), Liu C F (刘传福), Lu R (鲁茹), et al. Study on the determination method of bromide ion in water[J].Applied Chemical Industry(应用化工), 2013, 42(5): 936-938.

[11] ALLEN J.BARD, LARRY R. FAULKNER. ELECTROCHEMICAL METHODS Fundamentals and Applications[M].Beijing: Chemical Industry Press, 2011: 62-63, 67-68, 163, 159-160.

[12] Liu C L1 (刘成伦1), Xu L J2 (徐龙君2), Xian X F2 (鲜学福2). Study on the relationship between concentration of salt solution and its conductivity[J]. Environmental Monitoring in China (中国环境监测), 1999, 15(4): 21-24.

[13] Youyu Phillips. Kinetic and Adsorption Behaviour of the Anodic Bromine Formation Reaction[D]. Ottawa: Department of ChemistryUniversity of Ottawa, 1994.

[14] GracePoon,AishwaryaParasuraman, Tuti Mariana Lim, et al. Evaluation of N-ethyl-N-methyl-morpholinium bromide and N-ethyl-N-methyl-pyrrolidinium bromide as bromine complexing agents in vanadium bromide redox flow batteries[J]. ElectrochimicaActa, 2013, 107: 388-396.

[15] Lv G Q (吕桂琴), Ma S X (马淑贤). Determination of 4,5-Diazafluorene-9-One Diffusion Coefficients and Rate Constants by Chronocoulometry[J]. Transactions of Beijing Institute of Technology, 2014, 34(6): 650-654.

[16] W Kautek, A Conradi, ChFabjan, et al.In situ FTIR spectroscopy of the Zn€“Br battery bromine storage complex at glassy carbon electrodes[J]. ElectrochimicaActa, 2001, 47(5): 815-823.

[17] Y.Munaiah,S.Suresh,S.Dheenadayalan.ComparativeElectrocatalytic Performance of single-walled and multiwalled carbon nanotubes for zinc bromine redox flow batteries[J].The journal of Physical Chemistry,2014,118: 14795-14804.

[18] G. Bauer, J. Drobits, C. Fabjan, et al.Raman spectroscopic study of the bromine storing complex phase in a zinc-flow battery[J].Journal of Electroanalytical Chemistry, 1997, 427(1€“2): 123-128.

[19] Jae-DeokJeona, Hyeon Sun Yanga, JoonmokShima, et al. Dual function od quaternary ammonium in Zn/Br redox flow battery:Capturing the bromine and lowering the charge transfer resistance[J].ElectrochimicaActa, 2014,127:397-402.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.