Abstract: An alkaline dry battery of this invention includes: a positive electrode including at least one of a manganese dioxide powder and a nickel oxyhydroxide powder; a negative electrode including a zinc alloy powder; a separator interposed between the positive electrode and the negative electrode; an alkaline electrolyte; and a battery case for housing the positive electrode, negative electrode, the separator, and the alkaline electrolyte. The negative electrode further includes a surfactant that adsorbs to a surface of the zinc alloy powder during a non-discharge period and promptly desorbs from the surface of the zinc alloy powder upon start of discharge without impeding ion transfer in the alkaline electrolyte.

Abstract: There is disclosed an alkaline battery including a positive electrode material mixture, a negative electrode, a separator interposed between the positive electrode material mixture and the negative electrode, and an alkaline electrolyte, wherein the positive electrode material mixture includes a first active material comprising nickel oxyhydroxide and a second active material comprising manganese dioxide, the nickel oxyhydroxide includes a ?-type crystal structure, the content of nickel in the nickel oxyhydroxide is not less than 45 wt %, and the average particle diameter on a volume basis of the nickel oxyhydroxide measured with a laser diffraction particle size distribution analyzer is 3 to 20 ?m.

Abstract: An AA alkaline battery includes: a positive electrode; a negative electrode; a separator; and an alkaline electrolyte. The negative electrode contains 4.0 g or more of zinc as an active material and an indium compound in the range from 50 ppm to 1000 ppm, both inclusive, with respect to the weight of zinc. Zinc contained in the negative electrode includes zinc particles which has a size of 200 meshes or less and is in the range from 20 wt. % to 50 wt. %, both inclusive, with respect to the weight of zinc contained in the negative electrode.

Abstract: In a battery casing, there are accommodated a positive electrode containing manganese dioxide, a negative electrode containing zinc, and an electrolyte containing an aqueous solution of potassium hydroxide. The negative electrode contains bismuth of 100 ppm or less. In an AA dry battery, the amount of zinc in the negative electrode is 4.00 g or more, and the weight of the electrolyte is 4.00 g or more. In an AAA dry battery, the amount of zinc in the negative electrode is 1.71 g or more, and the weight of the electrolyte is 1.77 g or more.

Abstract: An AA alkaline dry battery includes a bottomed cylindrical casing of which internal volume is 6.25 ml or larger and which accommodates a positive electrode containing manganese dioxide of 9.30 g or more, a negative electrode containing zinc, and electrolyte containing an aqueous solution of potassium hydroxide of which concentration is 33.5 wt % or lower; a sealing member sealing the casing; and a negative electrode current collector extending from the sealing member into the negative electrode. The dry battery has, as discharge characteristics in the middle rate current discharge (AA dry batter), discharge duration until the battery voltage becomes 0.9 V is 9.3 hours or longer where discharge at 250 mA is performed at 25° C. for one hour per day.

Abstract: In order to provide an alkaline dry battery which enables to improve the operational stability of digital equipment by suppressing the progress of polarization during heavy load pulse discharge while maintaining the excellent heavy load discharge characteristics, and has an excellent reliability in terms of the leakage resistance and the safety under short-circuit conditions, the alkaline dry battery includes a positive electrode including a nickel oxyhydroxide powder and a manganese dioxide powder as positive electrode active materials, and including graphite as a conductive material; a negative electrode including zinc or a zinc alloy as a negative electrode active material; a separator interposed between the positive electrode and the negative electrode; a negative electrode current collector inserted in the negative electrode; an aqueous alkaline solution included in the separator; a battery case housing the positive electrode, the negative electrode, the separator, the negative electrode current collecto

Abstract: An alkaline dry battery of this invention includes: a positive electrode including at least one of a manganese dioxide powder and a nickel oxyhydroxide powder; a negative electrode including a zinc alloy powder; a separator interposed between the positive electrode and the negative electrode; an alkaline electrolyte; and a battery case for housing the positive electrode, negative electrode, the separator, and the alkaline electrolyte. The negative electrode further includes a surfactant that adsorbs to a surface of the zinc alloy powder during a non-discharge period and promptly desorbs from the surface of the zinc alloy powder upon start of discharge without impeding ion transfer in the alkaline electrolyte.

Abstract: Provided is an alkaline dry battery allowing suppression of polarization in pulse discharge under heavy load to improve discharge characteristics, and having high reliability in safety in case of short circuit. In the positive electrode, a calcium compound having a content of iron element of 150 ppm or less is added in an amount of 0.1 to 10 mol % with respect to a positive electrode active material, a nickel oxyhydroxide powder having 2.95 or more of an average nickel valence and 8 to 18 ?m of an average particle diameter is used, the weight ratio of the nickel oxyhydroxide powder and a manganese dioxide powder is in the range of 20:80 to 90:10.

Abstract: An alkaline dry battery includes a positive electrode, a negative electrode, a separator, and an alkaline electrolyte. The separator is provided between the positive electrode and the negative electrode, and the positive electrode, the negative electrode, and the separator are impregnated with the alkaline electrolyte. A battery depolarizer, which is an organic compound having a function of depolarizing both the positive electrode and the negative electrode or an alkaline metal salt thereof, is added to at least the alkaline electrolyte.

Abstract: Abstract Provided is an alkaline dry battery allowing suppression of polarization in pulse discharge under heavy load to improve discharge characteristics, and having high reliability in safety in case of short circuit. In the positive electrode, a calcium compound having a content of iron element of 150 ppm or less is added in an amount of 0.1 to 10 mol % with respect to a positive electrode active material, a nickel oxyhydroxide powder having 2.95 or more of an average nickel valence and 8 to 18 ?m of an average particle diameter is used, the weight ratio of the nickel oxyhydroxide powder and a manganese dioxide powder is in the range of 20:80 to 90:10.

Abstract: To provide an alkaline dry battery that is excellent in discharge characteristics under a heavy load after storage at high temperature and suppresses polarization in pulse discharge under a heavy load, used is a nickel oxyhydroxide which is obtained by oxidizing a nickel hydroxide having a half width of a (101) face of 0.6 to 0.8 deg./2? and a half width of a (001) face of 0.5 to 0.7 deg./2? in powder X-ray diffraction, and which has an average nickel valence of 2.95 or more and an average particle diameter of 8 to 18 ?m.

Abstract: A particulate positive electrode active material for an alkaline storage battery comprising: (a) solid solution nickel hydroxide particles containing at least magnesium and (b) a coating layer comprising cobalt oxide being formed on the surface of the solid solution nickel hydroxide particles. The amount of magnesium contained in the solid solution nickel hydroxide particles (a) is not smaller than 2 mol % and not larger than 15 mol % of the total amount of metal elements contained in the solid solution nickel hydroxide particles (a). BET specific surface area of the solid solution nickel hydroxide particles (a) measured by nitrogen gas adsorption is not smaller than 5 m2/g and not larger than 15 m2/g. The coating layer (b) further comprises at least one element Xs selected from the group consisting of yttrium, ytterbium, lutetium, titanium and calcium.

Abstract: An alkaline battery of this invention includes a positive electrode containing manganese dioxide powder and nickel oxyhydroxide powder with a mean particle size of 8 to 18 ?m as positive electrode active materials and graphite powder with a mean particle size of 8 to 25 ?m as a conductive material. The positive electrode contains 5 to 9 parts by weight of the graphite powder per 100 parts by weight of the positive electrode active materials.

Abstract: This invention relates to an alkaline battery including: an electrode assembly composed of a positive electrode, a negative electrode, and a separator; a negative electrode current collector inserted in the negative electrode; an electrolyte of an alkaline aqueous solution contained in the electrode assembly; a battery can for accommodating the electrode assembly, the negative electrode current collector, and the electrolyte; and a sealing member for sealing an opening of the battery can. The ratio of the electrical capacity of the negative electrode to the electrical capacity of the positive electrode is 1.00 to 1.15. The volume obtained by subtracting the volume of the electrode assembly containing the electrolyte and the volume of the negative electrode current collector from the internal volume of the battery that is formed by the battery can and the sealing member constitutes 5 to 15% of the internal volume.

Abstract: There is disclosed an alkaline battery including a positive electrode material mixture, a negative electrode, a separator interposed between the positive electrode material mixture and the negative electrode, and an alkaline electrolyte, wherein the positive electrode material mixture includes a first active material comprising nickel oxyhydroxide and a second active material comprising manganese dioxide, the nickel oxyhydroxide includes a ?-type crystal structure, the content of nickel in the nickel oxyhydroxide is not less than 45 wt %, and the average particle diameter on a volume basis of the nickel oxyhydroxide measured with a laser diffraction particle size distribution analyzer is 3 to 20 ?m.

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 order to provide a positive electrode active material capable of producing an alkaline storage battery having a high discharge voltage and an excellent discharge characteristic and also provide a positive electrode and alkaline storage battery containing thereof, a positive electrode active material for an alkaline storage battery comprising a nickel hydroxide powder is used, in which the nickel hydroxide is a solid solution containing magnesium, the magnesium content in the nickel hydroxide is 2 to 7 mol % of all metallic elements contained in the nickel hydroxide, the tap density of the nickel hydroxide is 1.9 g/cm3 or more, the half-width of a peak attributed to (101) face near 2&thgr;=37 to 40° in a powder X-ray diffraction pattern of the nickel hydroxide by CuK&agr; radiation is 0.7 to 1.2° and the sulfate ion content in the nickel hydroxide is 0.5 wt % or less.

Abstract: An alkaline storage battery comprising an improved separator and having a high energy density and an excellent cycle life characteristic is disclosed. The alkaline storage battery in accordance with the present invention comprises a positive electrode including a nickel hydroxide material as an active material, a negative electrode, a separator and an electrolyte, wherein the nickel hydroxide material of the positive electrode contains at least Mn or is disposed with a coating of a cobalt oxide material on its surface and wherein the separator carries particles of a hydrophilic and insulating metal oxide directly attached to its surface. The metal oxide particle is preferably at least one selected from the group consisting of titanium oxide, aluminum oxide, zirconium oxide, potassium titanate, tungsten oxide, and zinc oxide. The most preferable one is anatase type TiO2.

Abstract: A particulate positive electrode active material for an alkaline storage battery comprising: (a) solid solution nickel hydroxide particles containing at least magnesium and (b) a coating layer comprising cobalt oxide being formed on the surface of the solid solution nickel hydroxide particles. The amount of magnesium contained in the solid solution nickel hydroxide particles (a) is not smaller than 2 mol % and not larger than 15 mol % of the total amount of metal elements contained in the solid solution nickel hydroxide particles (a). BET specific surface area of the solid solution nickel hydroxide particles (a) measured by nitrogen gas adsorption is not smaller than 5 m2/g and not larger than 15 m2/g. The coating layer (b) further comprises at least one element Xs selected from the group consisting of yttrium, ytterbium, lutetium, titanium and calcium.