Abstract: Disclosed is an alkaline battery including a positive electrode, a negative electrode and an alkaline electrolyte, (1) the positive electrode having a positive electrode material mixture containing electrolytic manganese doxide and nickel oxyhydroxide, (2) the nickel oxyhydroxide having a crystal in which at least Mg is dissolved, and (3) the nickel oxyhydroxide having a tap density determined after 500 taps of not less than 2 g/cm3, an average particle size based on volume of 8 to 20 ?m, and an average nickel valence of 2.95 to 3.05.

Abstract: In order to obtain an alkaline dry battery low in the possibility of electrolyte leakage and excellent in discharge performance as well as an alkaline dry battery which is not likely to cause an internal short circuit even with the use of a thin separator, as a zinc powder used is one including 65 to 75 wt % of first zinc particles having a particle size of larger than 75 ?m and not larger than 425 ?m, and 25 to 35 wt % of second zinc particles having a particle size of not larger than 75 ?m.

Abstract: An alkaline battery according to the present invention includes: a power generation element including a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and an electrolyte; a positive terminal portion electrically connected to the positive electrode; and a negative terminal portion electrically connected to the negative electrode. The positive electrode contains at least nickel oxyhydroxide powder as an active material. A PTC element is provided in a current path that does not come into contact with the electrolyte at least one of between the positive electrode and the positive terminal portion and between the negative electrode and the negative terminal portion.

Abstract: An alkaline battery including a positive electrode, a negative electrode and an alkaline electrolyte, the positive electrode including a positive electrode material mixture containing a nickel oxyhydroxide, electrolytic manganese dioxide and a graphite conductive material, wherein the nickel oxyhydroxide includes a crystal having manganese dissolved therein and having a ? type structure, and the amount of the manganese contained in the nickel oxyhydroxide is 0.5 to 10 mol % relative to the total amount of nickel and the manganese in the nickel oxyhydroxide.

Abstract: A separator for alkaline batteries exhibits excellent property for holding the alkaline electrolyte, is not degraded even when the separator is used for alkaline batteries using a positive electrode mix containing an agent having a great oxidizing ability for enhancing the discharging property under a great load, maintains the function as the separator even when the separator is exposed to high temperatures for a long time and can be effectively used for alkaline batteries which are used for portable information instruments requiring the excellent discharging property under a great load such as digital cameras.

Abstract: The alkaline dry battery of the present invention has a battery case accommodating a positive electrode including manganese dioxide and nickel oxyhydroxide, a negative electrode including zinc, and an alkaline electrolyte; a sealing plate for sealing an opening of the battery case; and a sealing member disposed in between the battery case and the sealing plate. And the alkaline dry battery has a sealant layer including a blown asphalt and polybutene in between the battery case and the sealing member.

Abstract: An alkaline battery comprising: a positive electrode mixture comprising manganese dioxide and nickel oxyhydroxide as active materials; a negative electrode comprising zinc as an active material; and an alkaline electrolyte, characterized in that the potential of the manganese dioxide relative to a mercury/mercury oxide electrode in a potassium hydroxide aqueous solution having a KOH concentration of 40 wt % is 270 mV or higher.

Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.

Abstract: In order to provide a method of producing a gel negative electrode for an alkaline battery for preparing a gel negative electrode in which a zinc powder, a gelling agent and an electrolyte are disposed uniformly, by means of an agitator comprising a cylindrical agitation container disposed so that the center axis X of the cylinder is parallel to the horizontal direction, the agitation container is rotated around the center axis X and the left and right portions of the agitation container are swung around an axis Y, which is orthogonal to the longitudinal direction of the agitation container, thereby agitating and mixing the alkaline electrolyte and the dry mixture.

Abstract: In order to obtain an alkaline dry battery low in the possibility of electrolyte leakage and excellent in discharge performance as well as an alkaline dry battery which is not likely to cause an internal short circuit even with the use of a thin separator, as a zinc powder used is one including 65 to 75 wt % of first zinc particles having a particle size of larger than 75 &mgr;m and not larger than 425 &mgr;m, and 25 to 35 wt % of second zinc particles having a particle size of not larger than 75 &mgr;m.

Abstract: The present invention provides an alkaline battery having good heavy-loading discharge characteristics even after long-term storage at high temperatures. The alkaline battery of the present invention comprises a positive electrode containing manganese dioxide and nickel oxyhydroxide as an active material, a negative electrode containing zinc as an active material, and an alkaline electrolyte. The positive electrode further contains at least one compound selected from the group consisting of an oxygen-containing zinc compound, an oxygen-containing calcium compound, an oxygen-containing yttrium compound, and an oxygen-containing titanium compound.

Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.

Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.

Abstract: An alkaline battery using a mercury free zinc alloy powder as an anode active material is disclosed. It has a gelled anode which comprises silicon and zinc alloy powder containing at least one of a) aluminum and b) calcium, c) bismuth in combination with calcium.

Abstract: The sealing of the top and/or bottom of the cylindrical positive electrode of an air-cell is improved and leakage of the electrolyte from the jellied zinc negative electrode disposed within the positive electrode which is constituted of a collector layer, catalyst layer, and a porous layer is prevented. By utilizing a positive electrode constituted of a metallic collector layer made of a metal mesh or such, a catalyst layer disposed around said collector, and a fluororesin porous layer as an air diffusion layer, an outer cup and an inner cup are pressed on the top of the positive electrode in order to prevent the leakage of the electrolyte.