Effect of Li2O-B2O3-SiO2 glass on Li plus diffusion and dendrite resistance of Li6.1Ga0.3La3Zr2O12 solid-state electrolyte

초록

Garnet-type Li7La3Zr2O12 is currently being extensively studied as a potential candidate to replace the conventional liquid electrolytes due to prominent ionic conductivity and structural stability. The microstructure is the one of the important factor to obtain the electrochemical performances, resulting from Li-ion kinetics, local current density. Herein, we synthesize the Li6.1Ga0.3La3Zr2O12 with various Li2O-B2O3-SiO2 concentration (1, 3, 5, and 10 wt%) as a glass additive and investigate the effect on the crystallization, relative density, lithium ion conductivity and critical current density. Our findings reveal that proper amount of Li2O-B2O3-SiO2 could enhance the sinterability, thus enabling facile and continuous lithium ion conduction with suppressing propagation of Li dendrite through the pores. Therefore, it can be concluded that appropriate concentration of Li2O-B2O3-SiO2 can be regarded as a breakthrough to construct better solid electrolyte for all-solid-state lithium ion batteries.

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