Abstract: The present invention provides a mercury-free alkaline dry battery in which a utilization ratio of zinc as a negative electrode active material is increased to improve a discharge characteristic, the mercury-free alkaline dry battery including: a positive electrode; a negative electrode; and a separator, wherein almond-shaped zinc particles 21 are contained as a negative electrode active material. Each of the almond-shaped zinc particles 21 has a length of 1 mm to 50 mm in a long axis direction, both inclusive, and one of ends of the almond-shaped zinc particle in the long axis direction constitutes an acute end.

Abstract: The present invention provides a mercury-free alkaline dry battery which is improved in discharge characteristic at low cost. The mercury-free alkaline dry battery includes: a positive electrode; a negative electrode; and a separator, wherein a negative electrode active material contains short fibrous zinc particles, and each of the short fibrous zinc particles has a length of 1 mm to 50 mm, both inclusive, a major diameter of 2 ?m to 1 mm, both inclusive, and a specific surface area of 50 cm2/g to 1000 cm2/g, both inclusive.

Abstract: An alkaline battery which is superior in high-rate discharge characteristics and in moderate- and low-rate discharge characteristics is provided. An alkaline battery according to the present invention includes a closed-end cylindrical battery case 8 housing a hollow cylindrical positive electrode 2, a negative electrode 3 disposed in a hollow portion of the positive electrode 2, a separator 4 sandwiched between the positive electrode 2 and the negative electrode 3, and an alkaline electrolyte. The negative electrode 3 includes a zinc porous body. The alkaline electrolyte includes 0.1% to 2% by mass, both inclusive, of a surfactant having an average molecular weight of 120 to 350, both inclusive, with respect to a mass of zinc in the negative electrode 3.

Abstract: An AA alkaline battery according to the present invention includes: a positive electrode; a negative electrode; a separator; an alkaline electrolyte; and a negative electrode current collector. The negative electrode contains zinc, indium, and bismuth. The weight of zinc is 4.0 g or more, and the total weight of indium and bismuth is 450 ppm or less with respect to the weight of zinc. The negative electrode current collector contains copper. Tin is provided on at least part of the surface of the negative electrode current collector.

Abstract: The storage characteristics of an alkaline battery are improved by suppressing the production of hydrogen gas during storage. The alkaline battery includes a positive electrode, a negative electrode, and a conductive member in contact with the negative electrode. The negative electrode includes a zinc-containing negative electrode active material and an alkaline electrolyte, and the alkaline electrolyte includes a potassium hydroxide aqueous solution. The negative electrode active material, the alkaline electrolyte, and a contact surface of the conductive member with the negative electrode include the same metal element M, and the metal element M is a metal element other than zinc.

Abstract: A negative electrode material for non-aqueous electrolyte secondary batteries, characterized in that the negative electrode material comprises a composite particle including solid phases A and B, the solid phase A being dispersed in the solid phase B, and the ratio (IA/IB) of the maximum diffracted X-ray intensity (IA) attributed to the solid phase A to the maximum diffracted X-ray intensity (IB) attributed to the solid phase B satisfies 0.001?IA/IB?0.1, in terms of a diffraction line obtained by a wide-angle X-ray diffraction measurement of the composite particle.

Abstract: An alkaline battery includes: a positive electrode 3 including a positive electrode active material; a negative electrode 6 including a negative electrode active material; a separator 4; and an alkaline electrolyte. The negative electrode active material includes zinc alloy powder containing calcium and bismuth. The zinc alloy powder contains from 10% to 60%, both inclusive, by weight, of calcium with respect to bismuth, from 0.004% to 0.02%, both inclusive, by weight, of bismuth, and at least 11%, by weight, of particles with particle sizes of 75 ?m or less. With this configuration, high-power pulse discharge performance of the alkaline battery can be sufficiently enhanced without problems such as a rapid temperature rise in a short circuit and leakage.

Abstract: An electrical device comprises a positive electrode terminal for connection to the positive electrode of a battery, a negative electrode terminal for connection to the negative electrode of the battery, a load circuit receiving power from the positive and negative electrode terminals connected to the battery, a voltage detector detecting the voltage between the positive and negative electrode terminals, and a short circuiting portion for short-circuiting between the positive and negative electrode terminals when the voltage detected by the voltage detector becomes not larger than a particular preset voltage.

Abstract: An alkaline primary battery provided with a positive electrode containing a positive electrode active material and graphite, a negative electrode containing a negative electrode active material, a separator, and an alkaline electrolyte, the positive electrode active material containing manganese dioxide, the alkaline electrolyte containing zinc oxide, and the positive electrode containing metatitanic acid. Due to this, in a battery in which an alkaline electrolyte contains zinc oxide, productions of hetaerolite and the like at the positive electrode and depositions of titanium compound, zinc oxide, and the like on the inner face of a battery case are suppressed, and thus, excellent discharge performance and storage characteristics can be obtained.

Abstract: A negative electrode material for non-aqueous electrolyte secondary batteries, characterized in that the negative electrode material comprises a composite particle including solid phases A and B, the solid phase A being dispersed in the solid phase B, and the ratio (IA/IB) of the maximum diffracted X-ray intensity (IA) attributed to the solid phase A to the maximum diffracted X-ray intensity (IB) attributed to the solid phase B satisfies 0.001?IA/IB?0.1, in terms of a diffraction line obtained by a wide-angle X-ray diffraction measurement of the composite particle.

Abstract: A mercury-free alkaline battery which can sufficiently suppress generation due to zinc corrosion and Fe contamination, and can exhibit a small amount of a voltage drop after pulse discharge in a low-temperature atmosphere, is provided. The mercury-free alkaline battery includes a positive electrode material mixture pellet 3 and a gelled negative electrode 6. The gelled negative electrode 6 is formed by mixing and dispersing zinc alloy particles, as a negative electrode active material, in a gelled alkaline electrolyte (i.e., a dispersion medium). An anionic surfactant and a quaternary ammonium salt cationic surfactant are added to the negative electrode 6, thereby suppressing both gas generation in the negative electrode and a voltage drop after pulse discharge at low temperatures.

Abstract: An alkaline battery includes a positive electrode containing as a positive electrode active material manganese dioxide and nickel oxyhydroxide, and when the manganese dioxide is heated, a weight reduction percentage of the manganese dioxide at a temperature within a range of 100° C. or more and 400° C. or less is 3.8 wt % or more. When the manganese dioxide is subjected to X-ray powder diffraction measurement, a peak position of a diffraction plane with Miller indices of (110) is 20.5 degrees or more and 21.7 degrees or less and a ratio (I(130)/I(021)) of a peak intensity I (130) of a diffraction plane with miller indices (130) to a peak intensity I(021) of a diffraction plane with Muller indices of (021) is 0.1 or less.

Abstract: An alkaline dry battery includes a positive electrode 2 containing manganese dioxide, a negative electrode 3 containing zinc, and an electrolyte containing a potassium hydroxide aqueous solution, which are encased in a cylindrical battery case 1 with a bottom. Among X-ray CT images scanned from part of the battery holding the positive electrode by slicing the battery by planes perpendicular to a center axis of the battery case 1 with intervals of 0.2 mm, CT images in which at least one crack is detected in a region of the positive electrode constitute 10% to 80% by number of the total X-ray CT images, the crack being identified by a brightness of 98% or less of that of part of the positive electrode region surrounding the crack.

Abstract: In an AA alkaline battery, an opening of a battery case is sealed by a gasket. The battery case houses a positive electrode, a negative electrode, a separator, and an alkaline electrolyte. The positive electrode contains manganese dioxide having a potential of higher than or equal to 270 mV measured by using mercurous oxide (Hg/HgO) as a reference electrode in 40 wt % of a potassium hydroxide aqueous solution. The negative electrode contains 4.0 g or more of zinc. The gasket has a hydrogen gas permeability coefficient, per one gasket, in the range from 6×10?10 (cm3H2(STP)/sec·cmHg) to 3×10?9 (cm3H2(STP)/sec·cmHg), both inclusive.

Abstract: An AA alkaline battery includes a positive electrode containing larger than or equal to 9.30 g of manganese dioxide. The cumulative pore volume of pores having diameters from 0.97 ?m to 10.2 ?m, both inclusive, is in the range from 0.0035 ml/g to 0.0070 ml/g, both inclusive, in measurement of pore size distribution in the positive electrode performed by mercury intrusion porosimetry.

Abstract: A nonaqueous electrolyte secondary battery with excellent charging/discharging cycle characteristics is provided, more specifically a nonaqueous electrolyte secondary battery in which deterioration of the conductivity of a negative electrode due to charging/discharging cycle is suppressed and a method for manufacturing the same are provided. The nonaqueous electrolyte secondary battery includes: a positive electrode and a negative electrode that are capable of reversibly absorbing and desorbing Li ions; and a nonaqueous electrolyte having lithium ion conductivity. The negative electrode includes a collector and active material particles that are disposed on a surface of the collector. The active material particles include Si and at least one element R selected from the group consisting of Sn, In, Ga, Pb and Bi. Metallic bond including the element R is formed between the active material particles.

Abstract: An oxygen permeable film including an aggregate of water-repellent particles and having an average particle size of the particles of 0.01 to 50 ?m has a contact angle with water of not less than 120° and super water repellency, and therefore has an excellent water vapor permeation inhibiting capability. As the particles, fluorocarbon resins such as polytetrafluoroethylene, polyvinyl fluoride and polyvinylidene fluoride are suitable. The specific surface area of the oxygen permeable film is preferably not less than 0.1 m2/g and not more than 500 m2/g.

Abstract: An alkaline battery comprising a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode; and an alkaline electrolyte, wherein the positive electrode includes manganese dioxide and graphite; the cumulative pore volume of pores with diameters of 3 to 5 nm in the manganese dioxide is X (cm3/g), and the weight loss rate of the manganese dioxide when heated from 150 to 400° C. is Y (%), X and Y satisfying 0.005?X?0.011, 3.4?Y?3.9, and ?16.7X+3.58?Y?66.7X+3.17; the negative electrode includes zinc; and the alkaline electrolyte includes an aqueous potassium hydroxide solution.

Abstract: An AA alkaline battery according to the present invention includes: a positive electrode; a negative electrode; a separator; an alkaline electrolyte; and a negative electrode current collector. The negative electrode contains zinc, indium, and bismuth. The weight of zinc is 4.0 g or more, and the total weight of indium and bismuth is 450 ppm or less with respect to the weight of zinc. The negative electrode current collector contains copper. Tin is provided on at least part of the surface of the negative electrode current collector.

Abstract: An alkaline battery includes: a negative electrode including a zinc or zinc alloy powder as an active material; an alkaline electrolyte; and a positive electrode. The zinc or zinc alloy powder has a specific surface area of 0.01 to 10 m2/g, and the weight ratio of the electrolyte to the negative electrode active material is in the range of 0.1 to 2. This invention can provide an alkaline battery that is improved in electrolyte leakage resistance and high-rate discharge characteristics.