Stabilizing the interface of Li1.3Al0.3Ti1.7(PO4)3 and lithium electrodes via an interlayer strategy in solid-state batteries

Abstract

A polyvinylidene carbonate:BN layer was constructed between Li_1.3Al_0.3Ti_1.7(PO₄)₃ (LATP) and the lithium (Li) electrode, improving interfacial compatibility and thermal stability. The Li₃N-rich solid electrolyte interphase regulates Li deposition behaviors. The solid-state Li metal batteries (SSLMBs) show remarkable electrochemical performance, exhibiting endurance for 800 hours of cycling at 0.2 mA cm⁻² and a critical current density of 1.4 mA cm⁻². These studies provide guidance for interface engineering in SSLMBs.