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重塑-聚乙烯糖醇相互作用以促进在固体聚合物电解质中的运输

Guang Chen^1,2, Shun-Ran Peng^1,2, Ying Du^1,2

¹State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.

ACS applied materials & interfaces

|October 18, 2025

概括

三甲基胺氧化物 (TMAO) 通过削弱离子结合,增强金属电池的固体聚合物电解质 (SPEs). 这提高了离子导电性和电池循环稳定性,用于先进的能量存储.

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:

固体聚合物电解质 (SPEs) 对于固态金属电池 (LMB) 是至关重要的.
聚乙烯甘醇 (PEG) 基聚合物促进盐解离,但受到强烈的Li+结合和缓慢的离子运输的影响.
高效的+运输对于高性能聚合物电解质至关重要.

研究的目的:

调查三甲基胺氧化物 (TMAO) 在SPE中用于增强Li运输的使用.
修改Li+和PEG之间的相互作用,以克服运输限制.
为了提高金属电池的性能,使用修改后的SPEs.

主要方法:

将TMAO,一种生物衍生的透剂,纳入基于PEG的SPEs.
分析Li+-PEG相互作用和TMAO对聚合物极化的影响.
用LiNi_0.6Co_0.2Mn_0.2O₂阴极对金属电池中的SPE进行电化学测试.

主要成果:

TMAO有效地与Li⁺协调,从而削弱Li⁺-PEG结合.
在25°C时实现了1.07mS cm-1的增强离子导电性.
提高了循环稳定性,在LMB的300个循环中保持96%的容量.

结论:

TMAO是一种有前途的添加剂,可以增强SPE中的Li运输.
调节+聚合物相互作用是推进固态电池技术的可行策略.
这种方法为开发用于储能应用的高性能聚合物电解质提供了新的视角.

关键词:

在PEG脱极化过程中,PEG脱极化发生.快速的Li+运输方式金属电池的金属电池是什么固体聚合物电解质的电解质.三甲基胺氧化物三甲基胺氧化物

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