A high-performance COF-based aqueous zinc-bromine battery

被引：80

作者：

Zhang, You ^{[1
,2
]}

Wei, Chunlei ^{[1
,2
]}

Wu, Ming-Xue ^{[1
]}

Wang, Yan ^{[1
]}

Jiang, Hao ^{[1
]}

Zhou, Guohui ^{[1
]}

Tang, Xiao ^{[1
]}

Liu, Xiaomin ^{[1
]}

机构：

[1] Qingdao Univ, Sch Chem & Chem Engn, Qingdao 266071, Shandong, Peoples R China

[2] Qingdao Univ, Coll Mat Sci & Engn, Qingdao 266071, Shandong, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 451卷

基金：

中国国家自然科学基金;

关键词：

Dual -functional COF; Aqueous zinc -bromine batteries; Zinc dendrite; Shuttling effect; ELECTROLYTE; SECONDARY;

D O I：

10.1016/j.cej.2022.138915

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Aqueous zinc-bromine batteries can fulfil the energy storage requirement for sustainable techno-scientific advancement owing to its intrinsic safety and cost-effectiveness. Nevertheless, the uncontrollable zinc dendrite growth and spontaneous shuttle effect of bromine species have prohibited their practical imple-mentation. Herein, we develop an aqueous zinc-bromine battery integrated with the exfoliated covalent organic framework (exCOF)-bromine cathode and COF-coated zinc metal anode. As verified by experimental and theo-retical investigations, exCOF with abundant functional groups exhibits strong adsorption toward Br species, therefore immobilizes Br species and facilitates bidirectional conversion of polybromide. Meanwhile, the COF artificial layer on the surface of zinc metal anode can effectively regulate zinc flux and enable the uniform Zn deposition without dendrite growth. Consequently, owing to the synergistic effect of both COF-Zn anode and Br-2- exCOF cathode, the as-assembled COF-Zn||Br-2-exCOF full cell can deliver a remarkable capacity of similar to 183 mAh g(-1) (similar to 0.61 mAh cm(-2)) after 1000 cycles with capacity retention of similar to 83 % at 2 A g(-1) and high Coulombic efficiency of-99 %. Ultimately, this work can inspire insight into developing high-performance aqueous zinc -bromine battery systems. <comment>Superscript/Subscript Available</comment

引用

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