NOVELTY - Electric storage device comprises a positive electrode, a negative electrode and a separator that is placed between the positive electrode and negative electrode, where the positive electrode includes a positive electrode substrate and a positive active material layer formed on the positive electrode substrate. The protective layer covers side surfaces of the positive active material layer. The negative electrode includes a negative electrode substrate and a negative active material layer formed on the negative electrode substrate.    USE - Electric storage device, such as lithium ion batteries, nickel-metal hydride batteries and capacitors i.e. electric double layer capacitors for vehicles (automobiles and motorcycles), mobile terminals and laptop computers for use in an electric storage module (claimed).    ADVANTAGE - The electric storage device reduces the influence of the binder elution, suppresses performance degradation and generation of non-uniform deterioration. Disordered current distributions are suppressed during highly efficient charge-discharge.    DETAILED DESCRIPTION - Electric storage device comprises a positive electrode, a negative electrode and a separator that is placed between the positive electrode and negative electrode, where the positive electrode includes a positive electrode substrate and a positive active material layer formed on the positive electrode substrate. The protective layer covers side surfaces of the positive active material layer. The negative electrode includes a negative electrode substrate and a negative active material layer formed on the negative electrode substrate. The separator includes a separator substrate opposed to the negative active material layer. An inorganic layer is formed on the separator substrate and opposed to the positive active material layer.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a non-aqueous electrolyte secondary battery i.e. an electric storage device.    Non-aqueous electrolyte secondary battery (1)    Container (2)    Main body section case (2a)    Lid section (2b)    External gasket (5)