Abstract: A non-aqueous secondary battery wherein internal short circuits caused by some kinds of manufacturing processes can be prevented by avoiding the falling of active material particles from end faces of sheet electrodes, and the battery capacity of an electrode plate laminate which can be stored in a battery can of the same size as those of the conventional laminates can be increased without increasing the thickness of the active material layer. In order to realize the features mentioned above, at least one of end face of each of positive electrode active material layers (1b) and negative electrode active material layers (2b) is coated with an aggregation layer of insulating material particles (3F) wherein insulating material particles are bonded with binders. The positive electrode active material layer (1b) is formed in such a size that it may not overhang the negative electrode active material layer (2b) which is paired with the positive electrode active material layer (1b) for a cell layer.

Abstract: Disclosed is a battery comprising a positive electrode comprising a cathode active material layer, a negative electrode comprising an anode active material layer, and a sole porous separator disposed between the positive electrode and the negative electrode, wherein the positive electrode, the negative electrode and the separator are disposed in a casing containing an electrolyte, and wherein the porous separator comprises at least one layer of an aggregate form of particles of at least one insulating substance, the layer of the aggregate form of particles having a three-dimensional network of voids which function as pores of the porous separator and which are capable of passing ions therethrough.