| abstract |
The present invention provides a method for producing an oxide electrolyte sintered body having a high lithium ion conductivity by sintering at a lower temperature than in the past. SOLUTION: Li, H, one or more elements L among alkaline earth metals or lanthanoid elements, transition elements capable of taking 6-coordination with oxygen, and groups 12 to 15 And one or more elements M of the typical elements to which the general formula belongs, and the general formula is (Li x-3 yz , E y , H z ) L α M β O γ (E: Al, Ga, Fe, or Si) One or more elements selected from: 3 ≦ x−3y−z ≦ 7; 0 ≦ y <0.22; 0 <z ≦ 2.8; 2.5 ≦ α ≦ 3.5; 1.5 ≦ β ≦ 2.5; 11 ≦ γ ≦ 13), a step of preparing garnet-type ion conductive oxide crystal particles, a step of preparing a lithium-containing flux, and a garnet-type ion conductive oxide Oxide electrolyte firing comprising a step of mixing crystal particles and a flux and heating and sintering at 400 to 650 ° C. Method of manufacturing the body. [Selection] Figure 9 |