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长寿命全固态电池由冷压石榴复合电解质与增强的Li+导电能力所启用

Bing-Qing Xiong¹, Jianwei Zhang², Qingshun Nian¹

¹Hefei National Research Center for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Anhui, 230026, China.

Angewandte Chemie (International ed. in English)

|August 13, 2024

概括

研究人员开发了一种新的冷压固体电解质 (SSE),该电解质是通过将添加的,氧化 (Ta-LLZO) 和酸 (LPSC) 结合而成的. 这种复合材料增强了离子导电性,提高了电池性能,为更安全,高能量密度的电池铺平了道路.

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
固态化学固态化学

背景情况:

石榴石Li7La3Zr2O12 (LLZO) 是一种有前途的固态电解质 (SSE),用于高能量密度金属电池.
高温烧结的LLZO是脆弱的,而冷压的LLZO具有较低的离子导电性.
开发柔性和导电性SSE对于实际的全固态电池至关重要.

研究的目的:

为了创建一个柔性和高度导电的冷压固态电解质.
为了改善陶和硫化物电解质之间的接口特性.
为了提高金属电池的性能和安全性.

主要方法:

制造冷压添加的LLZO (Ta-LZ) 颗粒.
通过Li+导电性含Li的Ta-Cl结构,将Ta-LZ与柔性二酸盐化物 (LPSC) 集成在一起.
在Li对称细胞中描述离子导电性,激活能量和电化学性能.

主要成果:

复合的Ta-LZ/LPSC SSE具有4.42×10^-4 S/cm的Li+导电性和0.31 eV的低激活能量.
复合材料表现出优异的树抑制,临界电流密度为5.0mA/cm^2.2.
对称细胞在1mA/cm^2.2时实现了超过600小时的循环寿命.

结论:

开发的Ta-LZ/LPSC复合材料为制造柔性和导电性的冷压陶电解质提供了有前途的解决方案.
这种方法增强了界面Li+交换,创建了一个连续导电通道.
这些发现为制造高性能全固态电池提供了宝贵的见解.

关键词:

制冷压制的过程制冷压制的过程李树石是一种树石.所有固态电池都是固态电池.界面化学界面化学固态电解质固态电解质

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