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Graphitic Carbon Nitride (g‐C 3 N 4 ): An Interface Enabler for Solid‐State Lithium Metal Batteries
Author(s) -
Huang Ying,
Chen Bo,
Duan Jian,
Yang Fei,
Wang Tengrui,
Wang Zhengfeng,
Yang Wenjuan,
Hu Chenchen,
Luo Wei,
Huang Yunhui
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201914417
Subject(s) - materials science , lithium (medication) , electrolyte , lithium metal , metal , contact resistance , graphitic carbon nitride , carbon fibers , nitride , electrode , graphene , nanotechnology , chemistry , composite material , catalysis , metallurgy , layer (electronics) , medicine , biochemistry , photocatalysis , composite number , endocrinology
Solid‐state Li metal batteries (SSLMBs) have attracted considerable interests due to their promising energy density as well as high safety. However, the realization of a well‐matched Li metal/solid‐state electrolyte (SSE) interface remains challenging. Herein, we report g‐C 3 N 4 as a new interface enabler. We discover that introducing g‐C 3 N 4 into Li metal can not only convert the Li metal/garnet‐type SSE interface from point contact to intimate contact but also greatly enhance the capability to suppress the dendritic Li formation because of the greatly enhanced viscosity, decreased surface tension of molten Li, and the in situ formation of Li 3 N at the interface. Thus, the resulting Li‐C 3 N 4 |SSE|Li‐C 3 N 4 symmetric cell gives a significantly low interfacial resistance of 11 Ω cm 2 and a high critical current density (CCD) of 1500 μA cm −2 . In contrast, the same symmetric cell configuration with pristine Li metal electrodes has a much larger interfacial resistance (428 Ω cm 2 ) and a much lower CCD (50 μA cm −2 ).