纳米细胞电解质用于控制释放离子和重建超稳定高能量密度Zn-Mn电池的结网
Yongqi Deng1, Hongfei Wang1,2, Minghui Fan1
1Key Laboratory of Precision and Intelligent Chemistry, and Department of Chemical Physics, University of Science and Technology of China, Jinzai Road 96, Hefei 230026, Anhui, China.
Journal of the American Chemical Society
|September 1, 2023
概括
使用甲基尿素 (Mu) 的新型纳米细胞电解质有效抑制树突并提高Zn-Mn电池的可逆性. 这一突破为先进的储能应用提供了稳定的循环和高能量密度.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- - (Zn-Mn) 电池由于两电子转换反应而具有高电压和能量密度.
- 挑战包括阳极树突的生长,寄生性副作用,MnO2阴极反应的逆转性差.
- 氧气演变和水分裂的副作用进一步降低了电池的性能.
研究的目的:
- 开发一种新的纳米细胞电解质,以解决Zn-Mn电池的局限性.
- 提高阳极和二氧化阴极的稳定性和可逆性.
- 提高Zn-Mn电池的整体能量密度和循环性能.
主要方法:
- 合成了一种基于甲基尿素 (Mu) 的新型纳米细胞电解质.
- 电解质的设计是为了封装和控制Zn2+和Mn2+离子的沉积.
- 在阳极上形成固体电解质接口 (SEI) 保护层.
主要成果:
- 纳米细胞电解质成功引导了同质的Zn2+/Mn2+沉积,抑制了树突的生长.
- 通过改变电解质中的结网来抑制水分裂的副作用.
- 在对称电池中,Zn-Mn电池表现出800小时的周期稳定性,在完整电池中保持100%的容量.
结论:
- 基于甲基尿素的纳米电解质显著提高了-电池的性能.
- 它有效地减轻了阳极问题,并提高了阴极反应的可逆性.
- 开发的电解质可实现高能量密度 (800Wh/kg) 和长期稳定性,用于实际应用.
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