期刊
ADVANCED MATERIALS
卷 34, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202200181
关键词
Li-metal anodes; liquid metals; solid electrolyte; transfer technology; wettability
类别
资金
- National Key Research and Development Program of China [2020YFA0406104]
- National Natural Science Foundation of China [22075131]
- State Key Laboratory of Multiphase Complex Systems [MPCS-2021-A]
- Clean Vehicles, US-China Clean Energy Research Centre (CERC-CVC2) under US DOE EERE Vehicle Technologies Office
- DOE [DE-AC02-06CH11357]
Integrating solid-state electrolyte into Li-metal anodes has the potential to increase the energy density of rechargeable Li-metal batteries. However, creating a highly cyclable SSE/Li-metal anode is challenging. This study proposes a liquid-metal-derived hybrid solid electrolyte and introduces a facile transfer technology to construct an artificial solid electrolyte on Li metal.
Integrating solid-state electrolyte (SSE) into Li-metal anodes has demonstrated 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 the densification of the SSE is usually incompatible with the reactive Li metal. Here, a liquid-metal-derived hybrid solid electrolyte (HSE) is proposed, and a facile transfer technology to construct an artificial HSE on the Li metal is reported. By tuning the wettability of the transfer substrates, electron- and ion-conductive liquid metal is 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, makes 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 provides an alternate approach to build a robust solid electrolyte, which enables highly efficient Li-metal anodes.
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