NOVELTY - The battery has a stacked electrode assembly (15) formed by stacking a set of layers of positive electrode plates (1) and a set of layers of negative electrode plates (2) with a separator (32) placed in between. An outer body stores the stacked electrode assembly and non-aqueous electrolyte. The stacked electrode assembly is provided with an inorganic particle layer containing binder and inorganic particles between the positive electrode plate and the separator or between the negative electrode plate and the separator, where the non-aqueous electrolyte contains lithium difluorophosphate.    USE - Vacuum-sealed non-aqueous electrolyte secondary battery i.e. lithium-ion secondary battery, for a motor vehicle, electric vehicle (EV) and a hybrid electric vehicle (HEV).    ADVANTAGE - The non-aqueous electrolyte contains lithium difluorophosphate such that the inorganic particle layer is formed on a surface of the positive electrode plate, the negative electrode plate and on the separator with sufficient adhesiveness, thus facilitating fabrication of the stacked electrode assembly with inorganic particles of the aluminum oxide powder and the barium titanate powder at reduced manufacturing cost, and hence providing a small sized structure. The non-aqueous electrolyte contains material such as pyridine, diethyl phosphate, triethanolamine, cyclic ether,ethylenediamine, n-glyme, hexaphosphoric triamide, nitrobenzene derivative, sulfur, quinoneimine dye, N-substituted oxazolidinone, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, di-methoxy ethanol and aluminum trichloride, thus improving charge/discharge characteristics and flame resistance, and hence preventing degradation of driving performance in severe environments in cold areas and hot areas.    DETAILED DESCRIPTION - The separator is a polyolefin-based separator formed by stacking three layers in order of polypropylene, polyethylene and polypropylene. The additive amount of the lithium difluorophosphate is from 0.01 to 0.1 mol/liter. The total number of the layers of the positive electrode plate and the negative electrode plate is 100 or less. The battery is provided with thickness of 8 mm or smaller, and capacity of the battery is 5 Ah or more.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a stacked electrode assembly.    Positive electrode plates (1)    Negative electrode plates (2)    Stacked electrode assembly (15)    Separators (30, 32)    Type-I cells (31)