| 摘要 |
PROBLEM TO BE SOLVED: To obtain an all-solid-state high capacity lithium ion secondary battery having excellent output characteristics, by preventing short circuit between positive and negative electrodes.SOLUTION: In an all-solid-state high capacity lithium ion secondary battery, a positive electrode layer and a negative electrode layer are laminated while sandwiching a solid electrolyte layer. At least any one of the positive electrode layer and negative electrode layer is an electrode mixture layer containing active material particles and ion conductive assistant particles. When the surface roughness Rmax formed by the active material particles on the surface of the electrode mixture layer on the solid electrolyte layer side is prescribed, average particle size of solid electrolyte particles forming the solid electrolyte layer is 0.1-1.0 times of the Rmax, and the thickness of the solid electrolyte layer is 5 times or more of the Rmax, and less than 100 times of the average particle size of the solid electrolyte particles forming the solid electrolyte layer. |
