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单离子导体共价有机框架作为离子在基于聚乙烯氧化物的电解质中,用于坚固的固态Li-S电池

Jiaxue Zhang¹, Ben Hu¹, Acheng Zhu²

¹College of Mechanical Engineering, Wanjiang University of Technology, Ma'anshan 243031, China.

Journal of colloid and interface science

|September 6, 2024

概括

这项研究引入了一种新的硫化共价有机框架 (TpPa-SO3Li) 作为Li+来改进固态硫电池. 该材料增强了离子传输,从而使电池性能更加稳定和高效.

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
聚合物化学聚合物化学

背景情况:

基于聚乙烯氧化物 (PEO) 的电解质对于固态硫 (Li-S) 电池至关重要.
然而,PEO电解质表现出缓慢的离子 (Li+) 运输动力学,限制了电池的性能.

研究的目的:

开发一种使用硫化共价有机框架 (TpPa-SO3Li) 的新型Li+.
为了提高基于PEO的固态电解质的性能,用于Li-S电池.

主要方法:

硫化共价有机框架 (TpPa-SO3Li) 的合成.
制造包含TpPa-SO3Li的PEO复合电解质.
对立式Li-Li和固态Li-S电池的电化学表征.

主要成果:

在60°C时,PEO/TpPa-SO3Li复合电解质显示出增强的离子导电性 (6.28 × 10-4 S cm-1) 和高的Li+转移数 (0.78).
-对称电池实现了300小时的稳定循环,具有较低的超电位.
固态Li-S电池在60°C下经过600个周期的稳定循环,并具有98%的库伦比效率.

结论:

TpPa-SO3Li充当有效的Li+,改善PEO电解质中的Li+迁移.
开发的复合电解质为强大的固态Li-S电池提供了一个有前途的战略.
基于共价有机框架 (COF) 的Li+可以显著推进电池技术.

关键词:

阴离子共价有机框架离子的是离子.这种电池是LiS电池.聚乙烯氧化物) 的存在.固态电解质固态电解质

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