Korea Institute of Industrial Technology

Hye Min Ryu

Ho Sung Kim

Min Young Kim

Seung Hoon Yang

Da Hye Kim

Ha Young Jung

A method of preparing a sintered solid electrolyte includes (a) coprecipitating a mixed solution including a lanthanum precursor, a zirconium precursor, a gallium precursor, a complexing agent, and a pH adjuster to provide a solid electrolyte precursor; (b) washing and drying the solid electrolyte precursor to provide a washed and dried solid electrolyte precursor; (c) mixing the washed and dried solid electrolyte precursor with a lithium source to provide a mixture; (d) calcining the mixture to provide a calcined solid electrolyte, which is a gallium (Ga)-doped lithium lanthanum zirconium oxide (LLZO), as represented by Chemical Formula 1 below,LiLaZrGaO,&#x2003;&#x2003;Chemical Formula 1

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Gwangju, South Korea

Hye Min Ryu