| 摘要 |
PROBLEM TO BE SOLVED: To further enhance charge-discharge characteristics.SOLUTION: A lithium secondary battery 10 includes: a positive electrode sheet 13; a negative electrode sheet 18; and an ion conduction medium 20 that fills space between the positive electrode sheet 13 and the negative electrode sheet 18. A positive electrode mixture layer 12 of the lithium secondary battery 10 includes: a surface layer side mixture layer 12a located closer to a separator 19; and a collector side mixture layer 12b contacted with a collector 11. The collector side mixture layer 12b is formed to have a larger specific surface area of a cathode active material than the surface layer side mixture layer 12a. A negative electrode mixture layer 17 includes a surface layer side mixture layer 17a located closer to the separator 19; and a collector side mixture layer 17b contacted with the collector 11. The collector side mixture layer 17b is formed to have a larger specific surface area of an anode active material than the surface layer side mixture layer 17a. |
