LAUSR

Integrating solid-state electrolyte (SSE) into Li metal anodes has demonstrated a great promise to unleash the high energy density of rechargeable Li metal batteries. However, fabricating a highly cyclable SSE/Li metal anode remains a major challenge because densification of SSE is usually incompatible with reactive Li metal. Here, we propose a liquid-metal-derived hybrid solid electrolyte (HSE) and report a facile transfer technology to construct artificial HSE on Li metal. By tuning the wettability of transfer substrates, electron- and ion- conductive liquid metal was sandwiched between electron-insulating and ion-conductive LiF and oxides to form the HSE. The transfer technology renders the HSE continuous, dense, and uniform. The HSE having high ion transport, electron shut-off, and mechanical strength make the composite anode deliver excellent cyclability for over 4000 h at 0.5 mA cm-2 and 1 mAh cm-2 in a symmetrical cell. When pairing with LiFePO4 and sulfur cathodes, the HSE-coated Li metal dramatically enhances the performance of full cells. Therefore, this work demonstrates that tuning the interfacial wetting properties provide an alternative approach to building robust solid electrolyte, which enables high-efficient Li metal anodes. This article is protected by copyright. All rights reserved.