期刊
NANO LETTERS
卷 21, 期 14, 页码 6163-6170出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c01748
关键词
Lithium metal anode; solid-state electrolytes; interfacial engineering; garnet; electro-chemomechanical stability
类别
资金
- US Department of Energy Advanced Research Projects Agency - Energy [DEAR0000787]
- DOE EERE [DE-EE0008201]
- AIMLab
- Maryland Nanocenter, its Surface Analysis Center
The study introduces a novel approach to maintain a stable Li metal | electrolyte interface by depositing amorphous carbon nanocoating on a garnet-type solid-state electrolyte, demonstrating outstanding electro-chemomechanical stability and promoting homogeneity in lithium metal stripping and plating processes. This work suggests that amorphous carbon coatings may be a promising strategy for achieving stable Li metal | electrolyte interfaces and reliable Li metal batteries.
The use of solid-state electrolyte may be necessary to enable safe, high-energy-density Li metal anodes for next-generation energy storage systems. However, the inhomogeneous local current densities during long-term cycling result in instability and detachment of the Li anode from the electrolyte, which greatly hinders practical application. In this study, we report a new approach to maintain a stable Li metal | electrolyte interface by depositing an amorphous carbon nanocoating on garnet-type solid-state electrolyte. The carbon nanocoating provides both electron and ion conducting capability, which helps to homogenize the lithium metal stripping and plating processes. After coating, we find the Li metal/garnet interface displays stable cycling at 3 mA/cm(2) for more than 500 h, demonstrating the interface's outstanding electro-chemomechanical stability. This work suggests amorphous carbon coatings may be a promising strategy for achieving stable Li metal | electrolyte interfaces and reliable Li metal batteries.
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