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用添加的Li₇La₃Zr₂O₁₂基于纤维的复合电解质用于具有增强电化学性能的固态电池

Jilong Liu¹, Fusheng Yin¹, Yuezhen Mao¹

¹School of Chemical and Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, P. R. China.

ACS applied materials & interfaces

|June 6, 2024

概括

用添加的石榴石纤维通过提高离子导电性和抑制树突来增强固态电池 (SSLB). 这一进步使得商业应用的稳定,高性能电池成为可能.

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
固态电池是一种固态电池.

背景情况:

石榴电解质为固态电池 (SSLB) 提供高离子导电性和稳定性.
挑战包括低离子导电性和树的生长,阻碍SSLB的商业化.
开发先进的电解质对于下一代能源储存至关重要.

研究的目的:

使用电旋转合成化Li7La3Zr2O12 (LLZO-F0.2) 纤维.
在SSLB中研究LLZO-F0.2的电化学特性和性能.
为高性能固态电池展示一种可行的电解质.

主要方法:

在LLZO-F0.2前体溶液中进行电.
高温烧焦以形成石榴石纤维.
电化学表征包括离子导电性,转移数和对称和全细胞的循环测试.

主要成果:

在室温下达到5.37 × 10^-4 S cm^-1的离子导电率和0.61的离子转移数.
在对称细胞中表现出较低的电阻和均的剥离/沉积.
使用LiFePO4阴极的全电池显示出优异的速率能力和97.7%的容量保留在0.5°C的800个循环后.

结论:

用添加的纤维石电解质为高性能SSLB提供了一个有前途的解决方案.
合成的LLZO-F0.2材料解决了树岩生长和离子导电性的关键问题.
这项工作为开发更安全,更高效的固态电池提供了可行的途径.

关键词:

陶纤维是一种陶纤维.化物兴奋剂是用进行的.石榴石类型的电解质.二二二二二二二二二二固态电池固态电池

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