Method for producing solid electrolyte powder, and method for producing all solid state battery
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsMasashi Konya, Kazuki Tamai
Life of this patent
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Abstract
A method for producing a solid electrolyte powder includes preparing a mixed solution by adding a poor solvent to a good solvent solution that contains a good solvent and a solid electrolyte that contains an alkali metal element and/or an alkaline earth metal element, Sn and S; removing at least some of the good solvent from the mixed solution to precipitate solid electrolyte particles; and drying the solid electrolyte particles to obtain a solid electrolyte powder. The ratio of the volume of the poor solvent relative to the volume of the good solvent (volume of poor solvent/volume of good solvent) is 5 or more.
Claims14
A method for producing a solid electrolyte powder, which comprises:
- preparing a mixed solution by adding a poor solvent to a good solvent solution that comprises a good solvent and a solid electrolyte that comprises an alkali metal element and/or an alkaline earth metal element, Sn and S;
- removing at least some of the good solvent from the mixed solution to precipitate solid electrolyte particles;
- and
- drying the solid electrolyte particles to obtain a solid electrolyte powder,
- wherein the ratio of the volume of the poor solvent relative to the volume of the good solvent (volume of poor solvent/volume of good solvent) is 5 or more.
A method for producing an all-solid-state battery, which comprises:
- preparing a mixed solution by adding a poor solvent to a good solvent solution that comprises a good solvent and a solid electrolyte that comprises an alkali metal element and/or an alkaline earth metal element, Sn and S;
- removing at least some of the good solvent from the mixed solution to precipitate solid electrolyte particles;
- drying the solid electrolyte particles to obtain a dried solid electrolyte powder,
- wherein the ratio of the volume of the poor solvent relative to the volume of the good solvent (volume of poor solvent/volume of good solvent) is 5 or more;
- forming a solid electrolyte layer from the dried solid electrolyte powder;
- and
- layering a positive electrode layer, a negative electrode layer, and the solid electrolyte layer to form the all-solid-state battery.
Dependencies are inferred from the claim text.