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基于固态金属电池的静电驱动修改的分子控制

Kaizheng Dong¹, Chang Liu¹, Yaru Jiang¹

¹Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.

ACS applied materials & interfaces

|November 11, 2024

概括

研究人员通过增强聚乙烯氧化物 (PEO) 电解质与正电荷的MXene来提高固态电池性能. 这种修改提高了离子导电性和机械性能,使能源汽车能够稳定循环.

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:

对于电动汽车的高安全性,高能量密度电池的需求日益增加,需要先进的固态电解质.
聚乙烯氧化物 (PEO) 是由于其可加工性和接口兼容性而被广泛使用的固体电解质,但其离子导电性较低.

研究的目的:

为了增强基于PEO的固体电解质的机械性能和离子导电性.
为了稳定固态金属电池中的电化学循环.
调查正电荷的MXene作为PEO固体电解质的修饰剂的使用.

主要方法:

将正电荷的MXene纳入聚乙烯氧化物 (PEO) 固体电解质.
利用MXene和PEO之间的静电相互作用来改善电解质特性.
在Li/Li和Li/LiFePO4细胞中对改性电解质进行电化学测试.

主要成果:

显著提高PEO固体电解质的机械性能和离子导电性.
在Li/Li电池中,在0.1 mA cm−2下表现出超过430小时的出色循环稳定性.
在Li/LiFePO4电池中实现了出色的循环性能,容量保留率为92.1%.

结论:

带正电荷的MXene有效地改变PEO固体电解质,改善离子导电性和机械强度.
增强的PEO电解质证明了固态电池的优越电化学稳定性和循环性能.
这种方法为开发下一代高性能固态电池提供了一个有前途的战略.

关键词:

这就是MXene MXene.对于PEO来说,这是一个很好的选择.通过静电驱动驱动的静电驱动.金属电池的金属电池是什么固态电解质固态电解质

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