基于PEO的三层不可燃的固体电解质,用于高度安全的金属电池
Heesoo Lim1, Munseok S Chae2, Hasan Jamal1
1Division of Energy & Environmental Technology, DGIST, Daegu, 42988, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|November 4, 2024
概括
本研究介绍了一种用于金属电池的新型,不可燃烧的固体聚合物电解质,提高了安全性和离子导电性. 三层设计改善了电极接口交互和1000个周期的电池性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池提供高能量密度,但面临安全性和导电性挑战.
- 固体聚合物电解质,如聚乙烯氧化物 (PEO),提供安全性和设计灵活性,但需要改进.
- 现有的电解质存在消防安全和离子导电性问题.
研究的目的:
- 为金属电池开发一种具有优异离子导电性的新型不可燃固体聚合物电解质.
- 使用三层结构来增强机械强度和电极接口相互作用.
- 为了解决当前固体聚合物电解质的消防安全和离子导电性限制.
主要方法:
- 作为添加剂添加了decabromodiphenyl乙和泽奥利特.
- 开发一种具有自灭特性的三层电解质结构.
- 优化LiTFSI度以影响PEO结晶性和离子导电性.
主要成果:
- 在60°C时达到1.5mS cm-1的离子导电性,具有阻燃性.
- 证明了高达4.8V的阳极稳定性,并减少了60%LiTFSI添加的LiF形成.
- 显示出出色的电池性能:初始容量为153mAh-1g,在1000个循环中保持87.9%,库伦比效率为99.6%.
结论:
- 新的三层电解质增强了金属电池的安全性和离子导电性.
- 优化的LiTFSI度提高了PEO电解质特性和阳极稳定性.
- 开发的电解质可以实现高性能和稳定的金属电池运行.
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