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一个入侵阻断接口盾用于宽压范围固态金属电池

Xia Hu¹, Jiahao Yu¹, Yao Wang¹

¹Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.

Advanced materials (Deerfield Beach, Fla.)

|October 18, 2023

概括

一个in situ接口屏蔽可以防止在压力下的固态金属电池 (SSLB) 中入侵. 这种屏蔽增强了电池的稳定性和循环性,使高压应用成为可能.

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
电池技术电池技术

背景情况:

石榴石为固态金属电池 (SSLB) 提供了有希望的固态电解质.
外部堆压力可以诱导入侵,导致过早的电池故障.
开发减轻压力诱导退化的方法对于SSLB的进步至关重要.

研究的目的:

开发一个现场构造的接口屏蔽,以抑制压力诱导的SSLB中的入侵.
调查盾牌抑制树生长并改善界面性质的机制.
为了证明SSLB被接口屏蔽所保护的增强性能和高压耐受性.

主要方法:

在现场建造一个由金属Mo纳米晶和Li2S组成的界面屏蔽.
理论建模和实验调查盾牌对树生长和界面性质的影响.
基于Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 的SSLB在各种压力 (0.2MPa至70MPa) 下进行循环测试.

主要成果:

接口屏幕有效地抑制了压力诱导的入侵和树的生长.
金属Mo纳米晶体防止了树突的生长,而不会影响接口接触.
2S元件增强了接口可湿性,并阻碍了树的透.
屏蔽保护的基于LLZTO的电池显示显著增强了高达70MPa的循环和稳定性.

结论:

在现场构建的接口屏蔽是一种高度有效的策略,可以防止压力诱导的入侵SSLB.
屏蔽可以实现强大的界面稳定性和在各种压力下优异的电化学性能.
这项工作为SSLB在苛刻的操作条件下实际应用铺平了道路.

关键词:

外部堆的压力压力.石榴石类型的氧化物电解质.接口屏幕的屏蔽.的入侵入侵.固态金属电池固态金属电池

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