| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe lithium-ion secondary battery having high moisture- resistance where battery performance is prevented from decreasing caused by the effect of water on lithium containing complex oxide of a positive electrode material, and heat generation at the time of short-circuiting, etc., of the battery can be inhibited low. SOLUTION: This lithium-ion secondary battery has positive electrodes containing a positive electrode material made of particulates of lithium containing complex oxide, negative electrodes containing an active material enabling occlusion and emission of metal lithium, a lithium alloy and lithium ions, and an electrolyte. Here, at least one of surfaces of the lithium containing complex oxide partculates and surfaces of the positive electrodes have film made of a water-repellent material. At least on selected from among a fluorine containing macromolecular compound and an organosilicon compound are desirable as the water-repellent material. |
