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协同调节分离器孔状结构和表面特性,以实现无树和高性能水性离子电池
Yaxin Zhang1, Shanchen Yang2, Ying-Jie Zhu3
1College of Materials Science and Engineering, Hunan University, Changsha 410082, PR China; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China.
Journal of colloid and interface science
|November 27, 2023
概括
研究人员开发了一个纳米纤维素和SiO2层,用于水性离子电池中的玻璃纤维分离器. 这种修改防止了树脂的生长,大大延长了电池的寿命,并提高了大规模储能安全性.
科学领域:
- 电化学和材料科学 材料科学
背景情况:
- 水性离子电池 (ZIB) 提供安全,大规模的储能潜力.
- 在ZIB中,商用玻璃纤维分离器具有很大的孔隙,导致阳极上的离子流量不均和树脂的生长.
研究的目的:
- 开发玻璃纤维分离器的多功能层,以解决ZIB中的树脂石问题.
- 为了提高分离器的孔隙结构和表面性能,以获得稳定的金属阳极性能.
主要方法:
- 将纳米纤维素和SiO2纳米粒子层集成到商业玻璃纤维分离器上.
- 描述了修改后的分离器的纳米孔状结构和表面功能组.
- 在对称的Zn//Zn,Zn//AC和Zn//LiMn2O4全电池中评估了电化学性能.
主要成果:
- 修改后的层表现出统一的纳米孔状结构和丰富的负电荷的功能组.
- 调节Zn2+离子分布,促进均的核和生长,并防止树突.
- 实现了0.65的Zn2+离子转移数,并将对称Zn//Zn电池循环寿命延长到500小时.
结论:
- 协同修改策略有效地提高了水性ZIB的分离器性能.
- 开发的多功能分离器显示了安全和持久的储能应用的巨大潜力.
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