| 摘要 |
Provided is an all solid state lithium battery using an oriented positive electrode plate, and allowing the stress due to a distention of the oriented positive electrode plate during charging to be attenuated while effectively preventing a short circuit between the oriented positive electrode plate and a negative electrode layer. This all solid state lithium battery comprises: an oriented positive electrode plate configured from an oriented polycrystalline body wherein a plurality of lithium transition metal oxide particles are oriented; a solid state electrolyte layer; a negative electrode layer; and an extremity insulation portion for insulating and covering an extremity of the oriented positive electrode plate. The surface of the extremity insulation portion on the solid state electrolyte layer side configures a single surface that is continuous with the surface of the oriented positive electrode plate on the solid state electrolyte layer side, thereby having no step between the extremity insulation portion and the surface of the oriented positive electrode plate on the solid state electrolyte layer side. Alternatively, the surface of the extremity insulation portion on the solid state electrolyte layer side is a discontinuous surface that is lower than the surface of the oriented positive electrode plate on the solid state electrolyte layer side, while the step difference between the extremity insulation portion and the surface of the oriented positive electrode plate on the solid state electrolyte layer side is smaller than the thickness of the solid state electrolyte layer. |
