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构建阴离子选功能层,使得耐用水系统的无树脂金属阳极能够使用耐用水系统

Wenju Dong¹, Chenxu Liu¹, Xu Ji²

¹Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China.

|September 20, 2023

概括

一种新的聚硫改性硫化聚乙烯基涂层保护可充电水性离子电池中的阳极,防止树突和腐蚀,提高稳定性和性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

可充电的水性离子电池提供了安全和绿色的储能解决方案.
阳极面临着重大挑战,包括腐蚀,演化反应 (HER) 和被动化.

研究的目的:

为阳极开发一种有效的保护涂层,以克服现有的挑战.
为了提高水性离子电池的稳定性和循环性能.

主要方法:

开发一种聚硫改性硫化聚乙烯基作为一个阴离子的保护层.
测试受保护的对称Zn 基底Zn 细胞和不对称Zn 基底Ti 细胞.
使用 MnO2 阴极和操作拉曼光谱的全细胞的评估.

主要成果:

保护层使只有阴离子的传输成为可能,防止水和离子的攻击,从而抑制腐蚀和HER.
保护的对称Zn 能干Zn 电池表现出异常的稳定性,在1.0 mA cm−2下维持了5600 h的性能,在5.0 mA cm−2.0下维持了800 h的性能.
涂层有效地抑制了树突的形成和像Zn4SO4(OH) 6·5H2O这样的被动化产物,在不对称的细胞中实现了98.2%的库伦比效率.

结论:

开发的阴离子涂层显著提高了水性离子电池中阳极的稳定性和电化学性能.
该研究揭示了一种可逆的转化机制,涉及Zn4O3(SO4) ·7H2O (ZSH) 和ZnxHyMnO2在全细胞中.

关键词:

没有树突的 Zn 树突.水性离子电池 (ZIBs) 是一种离子电池.阴离子交换膜涂层的覆盖.硫化聚乙烯乙烯基硫化聚乙烯基对于的爱好性是非常重要的.

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