Abstract: An alkaline storage battery comprising: a positive electrode plate; a negative electrode plate; separators interposed between the positive electrode plate and the negative electrode plate; and an alkaline electrolyte, wherein a first edge of the positive electrode plate and a first edge of the negative electrode plate serve as current collecting portions, at least a second edge of at least the positive electrode plate is covered with polyethylene resin on an end face and peripheral sides thereof, the second edge being positioned opposite to the first edge, and the polyethylene resin film formed at the second edge of the positive electrode plate adheres to the separators positioned on both sides of the positive electrode plate.

Abstract: The present invention provides a non-sintered type positive electrode for alkaline storage battery whose drop out of active material powder is suppressed while maintaining favorable charging-discharging properties such as utilization factor. A non-sintered type positive electrode constituted by an electrically conductive support, a nickel hydroxide powder coated by cobalt oxyhydroxide (COH), an additive made of COH powder, and a binder, in which the average particle size of the nickel hydroxide powder coated by COH is greater than that of the additive made of COH powder.

Abstract: A nickel-metal hydride storage battery having a spirally wound electrode group including: (a) a positive electrode including an active material layer containing nickel hydroxide and a positive electrode core material; (b) a negative electrode including an active material layer containing a hydrogen storage alloy and a negative electrode core material; and (c) a separator interposed between the positive and negative electrodes, wherein the separator includes a hydrophilicity-imparted non-woven fabric including polyolefin or polyamide and has a thickness of 0.04 to 0.09 mm, and the percentage occupied by the cross section “SS” of the separator in the transverse cross section “S” of the electrode group is not greater than 25%.

Abstract: A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.