在酸性水性─MnO2电池中以阳离子调节的沉积溶解化学
Yuwei Sun1, Chen Wang1, Ling Gao1
1School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P.R. China.
Angewandte Chemie (International ed. in English)
|August 2, 2025
概括
这项研究介绍了一种酸性二氧化 (IMB) 电池系统,可以克服阳极腐蚀并提高可逆性. 阳离子调节接口可实现稳定的沉积和增强的二氧化循环,用于高性能储能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 酸性水性金属-MnO2可充电电池通过MnO2/Mn2+氧化还原化学提供高容量.
- 这些电池面临着诸多挑战,包括严重的阳极腐蚀和酸性介质中的不良可逆性.
- 开发稳定的电极接口对于推进酸性电池技术至关重要.
研究的目的:
- 报告一个新的酸性二氧化 (IMB) 电池系统.
- 为了研究可逆电极反应的阳离子调节的界面化学.
- 为了提高酸性可充电电池的性能和稳定性.
主要方法:
- 对阴离子 (Cl-,SO42-) 对沉积和MnO2可逆性的系统性研究.
- 开发定制的Cl-/SO4 2比率和一个离子脱的双电解质配置.
- 使用比斯木 (Bi) 基板进行现场合金的无电极IMB的演示.
主要成果:
- In-MnO2电池以1.7V的电压运行,能效72.3%,循环超过1500次.
- 缩的Cl-离子促进了均的沉积,而SO42-提高了MnO2的可逆性.
- 没有电极的IMB可以实现2000多个循环,提供高能量密度 (484.5 Wh kg-1) 和累积容量 (4120 mAh cm-2).
结论:
- 阳离子调节的界面化学可以在酸性IMB中实现可逆沉积-溶解反应.
- 量身定制的电解质组合和基板工程是高性能酸性电池的关键.
- 这项工作为先进的酸性可充电电池系统建立了设计范式.
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