A bipolar verdazyl radical for a symmetric all-organic redox flow-type battery

作     者：Grant D.Charlton Stephanie M.Barbon Joe B.Gilroy C.Adam Dyker Grant D.Charlton;Stephanie M.Barbon;Joe B.Gilroy;C.Adam Dyker

作者机构：Department of ChemistryUniversity of New BrunswickFredericton E3B 5A3New BrunswickCanada Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research(CAMBR)The University of Western OntarioLondon N6A 5B7OntarioCanada 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2019年第28卷第7期

页      面：52-56页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada (C. A. D.: DG, 04279 J. B. G.: DG, 435675 and S. M. B.: CGS D scholarship) support form the Canada Foundation for Innovation (CFI) the New Brunswick Innovation Foundation (NBIF) the University of New Brunswick. J. B. G. would like to thank the University of Western Ontario for support 

主　　题：All-organic redox flow battery Energy storage Verdazyl radicals Organic radical Coin cell 

摘      要：A symmetric all-organic non-aqueous redox flow-type battery was investigated employing the neutral small molecule radical 3-phenyl-1,5-di-p-tolylverdazyl,which can be reversibly oxidized and reduced in one-electron processes,as the sole charge storage *** voltammetry of the verdazyl radical in 0.5 M tetrabutylammonium hexa fluoro phosphate(TBAPF6)in acetonitrile revealed redox couples at-0.17 V and-1.15 V ***+/Ag,leading to a theoretical cell voltage of 0.98 *** the dependence of peak currents on the square root of the scan rate,diffusion coefficients on the order of 4 x 10 6 cm2 s-1 were *** performance was assessed in a static cell employing a Tokoyuma AHA anion exchange membrane,with 0.04 M verdazyl as catholyte and anolyte in 0.5 M TBAPF6 in acetonitrile at a current density of 0.12 mA *** coulombic efficiencies were good(94%-97%)throughout the experiment,the capacity faded gradually from high initial values of 93%of the theoretical discharge capacity to 35%by the 50th *** and energy efficiencies were 68%and 65%,*** analysis by cyclic voltammetry revealed that decomposition of the active material with cycling is a leading cause of cell degradation.