Method of manufacturing a solid lithium ion secondary battery with an electrolyte layer and/or positive electrode layer containing a crystallite having a lithium ion conducting property

摘要

A method of manufacturing a lithium ion secondary battery comprising the steps of: forming a laminate by laminating an electrolyte green sheet and a positive electrode green sheet; and sintering the laminate is provided. At least one of the electrolyte green sheet and the positive electrode green sheet contains an amorphous oxide glass powder in which a crystalline having a lithium ion conducting property is precipitated in the step of sintering. A solid state battery produced in accordance with the method is provided.

主权项

1. A method of manufacturing a lithium ion secondary battery comprising the steps of:
forming a laminate by laminating an electrolyte green sheet and a positive electrode green sheet; and sintering the laminate, wherein a total amount of a first oxide glass powder contained in the electrolyte green sheet and a second oxide glass powder contained in the positive electrode green sheet is in a range of 50 wt % to 75 wt% of a total weight of the electrolyte green sheet and the positive electrode green sheet, wherein the first oxide glass powder and the second oxide glass powder contain:
10 to 25 mol % of Li2O,0.5 to 15 mol % of Al2O3 and/or Ga2O3,25 to 50 mol % of TiO2 and/or GeO2,0 to 15 mol % of SiO2, and26 to 40 mol % of P2O5, wherein the positive electrode green sheet contains the second oxide glass powder in which a crystalline phase having a lithium ion conducting property is precipitated in the step of sintering at a sintering temperature such that an average particle diameter of the crystalline phase is not exceeding 1 μm.