A High-Performance Aqueous Zinc-Bromine Static Battery

• DOI: 10.1016/j.isci.2020.101348
• Publication Date: 2020-07-09T06:28:33Z
• Authors: Lujie Gao; Zhuxin Li; Yiping Zou; Shuangfeng Yin; Peng Peng; Yuying Shao; Xiao Liang
• Keywords: Science; Q; Electrochemical Energy Storage; Energy Storage; Energy Systems; 01 natural sciences; 7. Clean energy; Article; 0104 chemical sciences

The highly reversible zinc-bromine redox couple has been successfully applied in the flow batteries; however, non-electroactive pump/pipe/reservoir parts and ion-selective membranes are essential to suppress bromine diffusion. This work demonstrates a static (non-flow) battery without these auxiliary utilizing glass fiber separator, which overcomes high self-discharge rate low energy efficiency while advantages of chemistry well preserved. It is achieved by multifunctional additive, tetrapropylammonium bromide (TPABr), not only mitigates cross-diffusion regulating fluidic condensed solid phase but also provides favorable interface for zinc electrodeposition toward non-dendritic growth. proposed specific 142 Wh kg−1 with up 94%. By optimizing porous electrode architecture, shows an ultra-stable cycling life over 11,000 cycles controlled rate.