高可逆性水性金属电池的溶解结构规则
Zhongchen Zhao1, Zonghan Zhang2, Tian Xu1
1Department of Materials Science, Fudan University, Shanghai 200433, China.
Journal of the American Chemical Society
|January 9, 2024
概括
研究人员开发了一种用于水性电池的新电解质. 通过添加酸,他们抑制了副作用,提高了稳定性,并使电池具有高能量密度.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 金属 (Al) 在水性电池中具有很高的理论容量,但在常规电解质中遭受腐蚀和被动化等副作用.
- 这些问题源于离子和水分子之间的溶解反应,限制了电池的性能和寿命.
研究的目的:
- 抑制水活动和水性电解质中的Al腐蚀.
- 提高水性金属电池的电化学稳定性和可逆性.
主要方法:
- 通过在三甲硫酸水环境中插入-3-碳酸盐来优化Al3+溶解结构.
- 修改了Al电极的表面能量,使用pyridine-3-carboxylic acid来防止随机的Al沉积.
主要成果:
- 抑制水活动和腐蚀,显著改善电解质稳定性.
- 在含有 Al 预间接的 MnO2 阴极的水性 Al 电池中实现了显著的可逆性.
- 在600个循环后,在0.2 A g-1下显示保留的能量密度超过250 Wh kg-1.
结论:
- 通过控制溶解和表面能量,甲酸有效提高水性金属电池的稳定性.
- 开发的混合电解质使水性电池能够长期高性能运行,为先进的储能解决方案铺平了道路.
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