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强大的全固态金属电池由复合阳极启用,具有改进的批量扩散动力学特性

Shuxian Zhang¹, Jianchao Chen¹, Chunyan Zhu¹

¹Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University 250061, Ji'nan 250061, China.

|December 12, 2023

概括

一种新的复合阳极 (LAO) 提高了全固态电池 (ASSB) 的接口稳定性. 这提高了下一代能源存储的速率能力和循环稳定性.

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:

带有金属阳极的全固态电池 (ASSB) 承诺高能量密度.
金属阳极和固态电解质 (SSEs) 之间的界面不稳定性阻碍了ASSB的性能.
在Li/SSE接口的空隙形成和树突,极限速度能力和循环稳定性.

研究的目的:

为ASSBs开发一个稳定的阳极.
为了克服基于金属的ASSB的接口挑战.
为了提高所有固态电池的性能.

主要方法:

使用Li-Ag合金和Li2O构建了一个复合阳极 (LAO).
混合的石化和银氧化物 (Ag2O) 形成了LAO.
使用LAO阳极,Li6PS5Cl SSE和LiCoO2阴极进行测试的ASSB.

主要成果:

LAO改善了批量扩散动力学,并抑制了界面空隙形成.
实现了高临界电流密度 (>1.5 mA cm-2).
在ASSB中,在1 mA cm−2下经过1000个小时的稳定循环和在5°C下超过4000个循环.
在高LiCoO2负载 (17.8毫克/厘米−2) 维持稳定的运行,在0.2°C的温度下100多个周期运行.

结论:

复合阳极有效地解决ASSB的界面不稳定性.
LAO 能够实现优越的速度能力和长期的循环稳定性.
这种复合阳极对于高性能ASSB来说是一个有前途的战略.

关键词:

所有固态电池都是固态电池.复合材料是一种复合材料.接口接口接口接口金属阳极是一种金属阳极.固态电解质固态电解质

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