Stabilization of Li7La3Zr2O12 Solid Electrolyte through Ga-Based Precipitates and the Ga–Au Surface Layer
Dohun Kim,
Minh Hai Nguyen,
Seung Hoon Chun
et al.
Abstract:Garnet-type Li7La3Zr2O12 (LLZO) is a promising oxide solid electrolyte with high ionic conductivity and excellent stability toward Li metal. However, the presence of grain boundaries (GBs) causes a decrease in the ionic conductivity and cycling stability of the sintered LLZO. Herein, we promote the Ga precipitation at GBs through excessive doping with Ga/Al/Ta, simultaneously depositing a few nanometers thickness Au layer to form a Ga–Au surface layer. High-temperature sintering of heavily doped LLZO induces G… Show more
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