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固体聚合物电解质与双易斯酸填充剂,用于超稳定的金属电池

Piao Luo¹, Kexin Su¹, Yuanlong Wu¹

¹Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.

Advanced materials (Deerfield Beach, Fla.)

|April 26, 2025

概括

这项研究使用了Sand Sand.

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
聚合物科学聚合物科学

背景情况:

固体聚合物电解质 (SPEs) 为金属电池中的液体电解质提供了更安全的替代品.
树状石的形成仍然是一个关键的挑战,阻碍了SPE的性能和安全.
缺乏对SPE中树生长机制的系统研究.

研究的目的:

用沙子方程阐明SPE中树生长的决定因素.
提出一种有效的策略,用于制造无树的聚合物金属电池.
评估使用双易斯酸材料的新型SPEs的性能.

主要方法:

应用沙子方程来分析Li+离子运输和/条纹行为.
将双路易斯酸材料 (酸) 纳入基于PVDF-HFP的SPEs.
使用开发的SPE,对金属电池进行电化学测试.

主要成果:

沙子方程揭示了Li+转移数,扩散系数和度与树的生长时间正相关.
该PVDF-HFP/酸SPE实现了高的Li+转移数 (0.9) 和离子导电性 (9.2 × 10-4 S cm-1在30°C).
在LFP//Li和LiNi0.6Mn0.2Co0.2O2//Li细胞中经过数百到数千个循环证明了异常的循环稳定性.

结论:

双易斯酸材料有效地抑制了SPEs中的树形成.
与单个易斯酸系统相比,开发的SPEs具有优越的离子导电性和Li+运输特性.
这项工作为开发安全和高性能聚合物金属电池提供了有前途的途径.

关键词:

双易斯酸网站网站离子运输动态离子运输动态二二二二二二二二二二沙子方程中的沙子方程.固体聚合物电解质的电解质.

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