| 摘要 |
PROBLEM TO BE SOLVED: To suppress a thermal decomposition reaction at a positive electrode, the thermal decomposition reaction being caused by large heat generation at a negative electrode in short circuit discharge or the like, and maintain insulation property between the positive electrode and the negative electrode even if a separator is melted.SOLUTION: In a nonaqueous electrolyte battery, a thermal absorption layer is arranged between a positive electrode and a negative electrode. The thermal absorption layer may be present between the positive electrode and the negative electrode, and is formed on one side of a separator or at least one surface of the positive electrode and the negative electrode. The thermal absorption layer is a layer containing an inorganic particle and a resin material, having a thermal capacity per unit area of 0.0002 J/Kcmor more and a thermal capacity per unit volume of 1.5 J/Kcmor less, and having a porous structure. By the thermal absorption layer present between the positive electrode and the negative electrode, heat generated at the negative electrode is absorbed, heat transfer from the negative electrode to the positive electrode is suppressed, and insulation between the positive electrode and the negative electrode is maintained. |
