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12.6微米厚的不对称复合电解质,具有优越的界面稳定性,用于固态金属电池

Zheng Zhang¹, Jingren Gou¹, Kaixuan Cui¹

¹Beijing Key Laboratory for Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, People's Republic of China.

Nano-micro letters

|April 26, 2024

概括

研究人员开发了一种超薄的固态电解质,用于高能金属电池. 这种新的电解质提高了安全性和稳定性,为下一代电池技术铺平了道路.

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
储能储能储能储能储能储能

背景情况:

固态金属电池 (SSLMB) 提供高能量密度和安全性,但在电解质兼容性和厚度方面面临挑战.
在SSLMB中实现高能量密度需要通过高压阴极和阳极解决电解质限制.

研究的目的:

开发一种超薄的不对称复合物固态电解质,以提高SSLMB的性能.
为了提高电解质与高压组件的兼容性,并最大限度地减少厚度以获得更高的能量密度.

主要方法:

制造12.6μm不对称复合物固态电解质,使用在聚乙烯分离器上造带.
整合了石榴石 (LLZO) 层,以保持高压稳定性,以及金属有机框架 (MOF) 层,以保持均的Li+沉积.
使用聚乙烯分离器,以提高灵活性和机械完整性.

主要成果:

超薄的电解质实现了1.69毫克厘米-2.2的超轻面积密度.
在Li对称电池中,已经证明了5000小时的超长周期寿命.
高压SSLMB表现出稳定的循环性能,组装的袋式电池达到344.0Wh kg-1重力密度和773.1Wh L-1体积密度.

结论:

开发的超薄不对称复合物固态电解质显著提高了SSLMB的性能.
设计策略为大规模准备提供了可扩展的方法,并表明了SSLMB发展的未来方向.
这项工作解决了SSLMB的关键挑战,实现了更高的能量密度和更好的安全性.

关键词:

复合固态电解质复合物固态电解质囊细胞是一种囊细胞.固态金属电池固态金属电池超薄的不对称结构超薄的不对称结构

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