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超薄不对称复合电解质的设计,用于界面稳定的固态金属电池

Zheng Zhang¹, Wanqing Fan², Kaixuan Cui¹

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

|June 25, 2024

概括

这项研究引入了用于固态金属电池的超薄不对称复合电解质. 这些电解质增强了界面稳定性,抑制了树突,并改善了更安全,高能量的电池的循环寿命.

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 (SSLMBs) 需要先进的电解质来实现高能量密度.
在阳极和高压阴极上同时实现界面稳定仍然是一个重大挑战.

研究的目的:

开发用于SSLMBs的超薄不对称复合电解质.
为了解决SSLMB中电极和电解质之间的接口挑战.
提高高能SSLMB的安全性和周期寿命.

主要方法:

制造超薄的不对称复合电解质 (26.8μm),使用两侧带造与聚胺 (PI) 纤维膜增强.
使用PI纤维膜和Li7La3Zr2O12陶纤维,实验和理论证明树抑制.
集成多元件固体电解质介面阶段和阴极电解质介面层.

主要成果:

不对称的设计提供了出色的树脂穿孔阻力和高压兼容性.
对称电池显示抑制了树突的生长,并延长了长达4000小时的循环寿命.
一个LiNi0.8Co0.1Mn0.1O2袋式电池实现了高能量密度 (333.1 Wh kg-1 / 713.2 Wh L-1) 并且具有特殊的安全性.

结论:

开发的超薄不对称复合电解质有效地解决了SSLMB中的电极/电解质接口问题.
这种设计策略对于提高下一代固态电池的性能和安全性至关重要.
这项研究为高能SSLMB的实际应用铺平了道路.

关键词:

不对称的结构设计设计.袋子细胞袋子细胞固态金属电池固态金属电池造带造造带造造带造超薄复合电解质的电解质是非常薄的.

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