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为无阳极固态电池量身定制的接口设计

Jiayun Wen¹, Tengrui Wang¹, Chao Wang¹

¹Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.

Advanced materials (Deerfield Beach, Fla.)

|November 6, 2023

概括

工程师为无阳极固态电池 (AFSSB) 开发了一种新的接口,以提高稳定性和效率. 这种设计可以防止树石的生长,并提高性能,为更安全,更高能量的电池铺平了道路.

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
储能储能储能储能储能储能

背景情况:

无阳极固态电池 (AFSSB) 提供高安全性和能量密度,但库伦比效率较低.
固体电解质/电流采集器接口和树生长的恶化限制了实际的AFSSB应用,特别是在石榴电解质.

研究的目的:

为稳定和高效的石榴石基AFSSB引入一个接口工程策略.
解决 AFSSB 中的接口不稳定性和树增长的挑战.

主要方法:

设计了石榴电解质和铜电流收集器之间的接口.
使用LiC₆层,以实现高离子导电性.
包含化聚烯酸聚合物层,用于界面自适应.
通过-银 (Li-Ag) 合金反应进行调节的沉积.

主要成果:

在以石榴石为基础的AFSSB中实现了长期稳定的运行.
显著提高了Coulombic的效率,并抑制了树的生长.
量身定制的接口设计导致了与LiCoO2阴极 (3.1 mAh cm-2) 配对时的优异容量保留.

结论:

接口工程策略提高了无阳极固态电池的稳定性和效率.
这种方法为开发下一代高安全性,高能量密度电池提供了可行的途径.
这些发现为设计先进电池架构提供了关键的见解.

关键词:

液化碳6离子导电层 LiPAA 聚合物层的聚合物层.没有阳极的固态电池.界面兼容性界面兼容性界面兼容性

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