Patent ID: 8192869
Filing Date: 2012-06-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A method for manufacturing a lithium ion secondary battery comprising: preparing a first green sheet comprising at least one of lithium ion conductive inorganic powder and inorganic powder which becomes lithium ion conductive when it is heat treated; heat treating the first green sheet at a first temperature obtaining a thin film solid electrolyte; laminating a second green sheet comprising a first electrode active material and said at least one of the lithium ion conductive inorganic powder and the inorganic powder contained in the first green sheet on a first surface of the thin film solid electrolyte; heat treating the second green sheet at a second temperature which is lower than the first temperature by 50° C. or more; laminating a third green sheet comprising a second electrode active material and said at least one of the lithium ion conductive inorganic powder and the inorganic powder contained in the first green sheet on a second surface of the solid electrolyte; and heat treating the third green sheet at a third heat treating temperature which is the same as or lower than the second heat treating temperature; wherein the lithium ion conductive inorganic powder has crystals of Li 1+x+z M x (Ge 1−y Ti y ) 2−x Si z P 3−z O 12 (0≦x≦0.8, 0≦y≦1.0, 0≦z≦0.6 and M is one or both of Al and Ga).