Suppression of self-discharge in a non-flowing bromine battery via in situ generation of countercharged groups

Wang，Yanfang1,2,3; Yi，Zhibin1,4; Luo，Wen1; Qin，Ning1; Luo，Guangfu1,4; Allan，Phoebe K.2; Zhang，Fucai3; Lu，Zhouguang1

2021-11-17

10.1016/j.xcrp.2021.100620

Cell Reports Physical Science   影响因子和分区

2666-3864

Bromine is attractive for next-generation energy-storage systems because of its high capacity and natural abundance. However, because of issues relating to self-discharging processes, prototypes involving bromide/bromine redox couples are largely limited to the design of flow cells. Here we propose a method to exploit bromine redox chemistry and demonstrate the feasibility of mitigating ion depletion in a stationary device. A cell using polyaniline vapor-grown carbon fiber (PANI-VGCF) as the electrode material exhibits close to 100% Coulombic efficiency at a low current density (50 mA/g). Electrochemical results, operando Raman spectroscopy, and theoretical analysis provide clues that the strong interaction between protonated PANI and Br/ Br makes their decoupling unfavorable, thereby suppressing self-discharge processes. This strategy could be utilized for rational design of other conjugated materials/bromine systems without self-discharge issues.

anion redox aqueous battery bromine chemistry conductive polymer

英语

第一 ; 通讯

2-s2.0-85119181120

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Chemistry,University of Birmingham,Birmingham,B15 2TT,United Kingdom
3.Department of Electronic and Electrical Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Guangdong Provincial Key Laboratory of Computational Science and Material Design,Southern University of Science and Technology,Shenzhen,518055,China

Wang，Yanfang,Yi，Zhibin,Luo，Wen,et al. Suppression of self-discharge in a non-flowing bromine battery via in situ generation of countercharged groups[J]. Cell Reports Physical Science,2021,2(11).

Wang，Yanfang.,Yi，Zhibin.,Luo，Wen.,Qin，Ning.,Luo，Guangfu.,...&Lu，Zhouguang.(2021).Suppression of self-discharge in a non-flowing bromine battery via in situ generation of countercharged groups.Cell Reports Physical Science,2(11).

Wang，Yanfang,et al."Suppression of self-discharge in a non-flowing bromine battery via in situ generation of countercharged groups".Cell Reports Physical Science 2.11(2021).