A High-Performance Aqueous Zinc-Bromine Static Battery
Lujie Gao,
Zhuxin Li,
Yiping Zou,
Shuangfeng Yin,
Peng Peng,
Yuying Shao,
Xiao Liang
Affiliations
Lujie Gao
State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, P.R. China
Zhuxin Li
State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
Yiping Zou
State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
Shuangfeng Yin
State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
Peng Peng
State Grid Shanghai Municipal Electric Power Company, 310 South of Chongqing Road, Shanghai 200025, P. R. China
Yuying Shao
State Grid Shanghai Municipal Electric Power Company, 310 South of Chongqing Road, Shanghai 200025, P. R. China
Xiao Liang
State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, P.R. China; Corresponding author
Summary: The highly reversible zinc-bromine redox couple has been successfully applied in the zinc-bromine flow batteries; however, non-electroactive pump/pipe/reservoir parts and ion-selective membranes are essential to suppress the bromine diffusion. This work demonstrates a zinc-bromine static (non-flow) battery without these auxiliary parts and utilizing glass fiber separator, which overcomes the high self-discharge rate and low energy efficiency while the advantages of the zinc-bromine chemistry are well preserved. It is achieved by a multifunctional additive, tetrapropylammonium bromide (TPABr), which not only mitigates the bromine cross-diffusion by regulating the fluidic bromine to a condensed solid phase but also provides a favorable interface for zinc electrodeposition toward non-dendritic growth. The proposed zinc-bromine static battery demonstrates a high specific energy of 142 Wh kg−1 with a high energy efficiency up to 94%. By optimizing the porous electrode architecture, the battery shows an ultra-stable cycling life for over 11,000 cycles with controlled self-discharge rate.
