阳极
材料科学
涂层
法拉第效率
石墨烯
腐蚀
化学工程
电池(电)
电偶阳极
锌
储能
电化学
氧化物
纳米技术
冶金
阴极保护
电极
化学
工程类
物理化学
功率(物理)
物理
量子力学
作者
Sebastian Lin,Minghao Li,Guotao Wang,Chao Wang,Han Yang,Zhoulu Wang,Yi Zhang,Xiang Liu,Jinhye Bae,Yutong Wu
出处
期刊:Small
[Wiley]
日期:2024-01-24
卷期号:20 (15)
标识
DOI:10.1002/smll.202311510
摘要
Zinc-bromine (Zn-Br) redox provides a high energy density and low-cost option for next-generation energy storage systems, and polybromide diffusion remains a major issue leading to Zn anode corrosion, dendrite growth, battery self-discharge and limited electrochemical performance. A dual-functional Alginate-Graphene Oxide (AGO) hydrogel coating is proposed to prevent polybromide corrosion and suppress dendrite growth in Zn-Br batteries through negatively charged carboxyl groups and enhanced mechanical properties. The battery with anode of plain zinc coated with AGO (Zn]AGO) survives a severely corrosive environment with higher polybromide concentration than usual without a membrane, and achieves 80 cycles with 100% Coulombic and 80.65% energy efficiencies, four times compared to plain Zn anode. The promising performance is comparable to typical Zn-Br batteries using physical membranes, and the AGO coating concept can be well adapted to various Zn-Br systems to promote their applications.
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