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用于固态金属电池的纳米充电复合聚合物电解质的离子动态接口工程

Shanshan Lv¹, Jingwen Wang¹, Yuanming Zhai²

¹College of Polymer Science and Engineering, National Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, 610065, People's Republic of China.

Nano-micro letters

|August 29, 2025

概括

这项研究通过修改化纳米管 (HNT) 表面电荷来设计纳米充电复合聚合物电解质 (NCCPE). 有正电荷的HNT显著改善了离子动态接口,提高了电池的性能和稳定性.

科学领域:

材料科学
电化学
聚合物科学

背景情况:

复合聚合物电解质 (CPE) 对于固态金属电池 (ASSLMB) 是至关重要的.
传统的纳米填充器在CPE中难以实现同时强大的电化学和机械接口.
纳米填充剂的表面特性对CPE性能产生重大影响.

研究的目的:

通过调节化纳米管 (HNT) 表面电荷,在纳米充电CPE中设计离子动态接口 (Li+-DI).
研究HNT表面电荷特性对NCCPE的机械和离子导电行为的影响.
提高ASSLMB的电化学和机械稳定性.

主要方法:

化纳米管 (HNT) 的表面电荷修饰.
使用改性HNT制造纳米充电复合聚合物电解质 (NCCPE).
+DI的特性,机械性能 (硬度),离子导电性和NCCPE的电化学性能.
组装和测试酸NCCPE酸FePO4电池

主要成果:

与负电荷的HNT相比,正电荷的HNTs (HNTs+) 显著改变了Li+DI,导致更高的Li+转移数 (0.86).
由于强大的Li+介导接口兼容性,HNTs+提高了NCCPE的性2000%.
HNTs+有效地减弱了Li+溶解,并促进了富含LiF的固体电解质间相,提高了电池循环寿命 (在0.5°C下400个循环后144.9mAhg-1,保持78.6%).

结论:

调节纳米填充器表面电荷是CPE动态接口的可行策略.
带正电荷的HNT通过优化机械和电化学性能,为ASSLMB提供了优于NCCPE的性能.
这项工作提供了对固态电池内部接口的纳米填充器表面电荷效应的基本见解.

关键词:

充电纳米填充器动态离子接口纳米复合物聚合物电解质固体离子导体固态金属电池

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