聚合物异质电解质启用固态2.4-V Zn/Li混合电池
Ze Chen1, Tairan Wang1, Zhuoxi Wu1
1Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China.
Nature communications
|May 3, 2024
概括
研究人员开发了一种用于 (Zn) 电池的新型聚合物异质电解质. 这项创新通过分离 Zn 和离子可逆性来实现高电压和稳定循环,克服了储能方面的关键限制.
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:
- 的高氧化还原潜力导致电池的低电压和能量密度.
- 使用像LiNi0.5Mn1.5O4 (LNMO) 这样的高压阴极受到Zn2+离子固定和不可逆转的阻碍.
研究的目的:
- 设计一种新的电解质,使高压和稳定的 Zn 电池成为可能.
- 为了克服高压阴极中Zn2+离子固定化的局限性.
主要方法:
- 开发一种聚合物异质电解质,具有明显的阳极和阴极层.
- 阳极层使用Zn2+离子作为电荷载体.
- 阴极层被设计为阻断Zn2+离子穿,允许分离Zn和Li的可逆性.
主要成果:
- 开发的Zn‖LNMO电池实现了2.4V的放电电压.
- 演示了450个稳定的周期,具有高可逆能力.
- 一个规模化的囊细胞维持了性能,并在28天后显示出低自放电.
结论:
- 设计的聚合物异质电解质促进了分离的和的可逆性.
- 这种方法使得能够开发具有可逆电极的高压Zn电池.
- 这项技术对苛刻的储能应用具有前景.
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