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电子透屏蔽中间层使超稳定的全固态金属电池成为可能

Yang Zhao¹, Yuetao Ma¹, Jun Yang¹

¹Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|November 18, 2025

概括

使用Poly[bis(4-phenyl) ((2,4,6-triMethylphenyl) aMine] (PTAA) /SnO2 (PS) 双层的新型接口策略有效地抑制了Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 固态电池中的树脂的生长. 这提高了稳定性和循环性能,用于实际应用.

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
固态电池固态电池是什么

背景情况:

在Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 粒边界的电子透导致内部沉积和短路.
这大大阻碍了LLZTO在全固态电池中的实际应用.

研究的目的:

提出LLZTO和金属 (Li) 之间的电子透屏蔽接口建设战略.
为了抑制在接口和LLZTO电解质内的树脂的生长.
为了提高石榴石基全固态金属电池的性能和耐用性.

主要方法:

设计了一个Poly[bis(4-phenyl) ((2,4,6-triMethylphenyl) aMine] (PTAA) /SnO2 (PS) 双层接口 (LLZTO-PS ठोसLi).
利用PTAA和SnO2产生的反向电场来阻止电子泄漏并降低LLZTO的电子导电性.
涂上光滑紧的PTAA/SnO2涂层,以增强接口接触并促进均的涂.

主要成果:

立体管LLZTO-PSLi立体管对称电池在0.1 mA cm-2下实现了5000小时的稳定循环,在0.5 mA cm-2下达到2500小时的稳定循环.
在1C的2000个循环后,LiidiyeLLZTO-PS的LiFePO4充电池保持了86.2%的容量.
证明有效地抑制内部状物形成和均的涂层.

结论:

PTAA/SnO2双层接口策略有效地减轻了LLZTO中的电子透问题.
这种方法显著提高了固态金属电池的电化学性能和长期稳定性.
为推进基于石榴石的固态电池技术提供了一个可行的解决方案.

关键词:

一个LLZTOTO.界面优化界面优化界面优化接口电场之间的电场.固态金属电池固态金属电池

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