Abstract: [Problem] To suppress increases in the resistance of nickel positive electrodes and assure sufficient battery capacity even after repeated pulse charging and discharging cycles with a large current. [Solution] This alkaline storage battery (10) contains aluminum (Al) in a hydrogen storage alloy negative electrode (12) and also includes Al in a nickel positive electrode (11). In a state where a prescribed charging and discharging cycle has completed, the Al content in the nickel positive electrode (11) is 0.25% by mass or greater of that in the positive electrode active material, and in powder x-ray diffraction of the positive electrode active material using Cu—K?, the half-width of the (101) plane peak for Ni(OH)2 is controlled so as to be 0.5 (°/2?) or greater.

Abstract: [Problem] To suppress increases in the resistance of nickel positive electrodes and assure sufficient battery capacity even after repeated pulse charging and discharging cycles with a large current. [Solution] This alkaline storage battery (10) contains aluminum (Al) in a hydrogen storage alloy negative electrode (12) and also includes Al in a nickel positive electrode (11). In a state where a prescribed charging and discharging cycle has completed, the Al content in the nickel positive electrode (11) is 0.25% by mass or greater of that in the positive electrode active material, and in powder x-ray diffraction of the positive electrode active material using Cu—K?, the half-width of the (101) plane peak for Ni(OH)2 is controlled so as to be 0.5 (°/2?) or greater.

Abstract: In a sintered nickel electrode for alkaline storage battery formed by filling nickel hydroxide as an active material into a porous sintered substrate and an alkaline storage battery using as its positive electrode the sintered nickel electrode for alkaline storage battery, tungstic acid is adhered to a surface of said nickel hydroxide as an active material.

Abstract: The nickel electrode for alkaline secondary battery according to the present invention is obtained by applying a paste containing active material particles comprising nickel hydroxide to a conductive substrate and drying the paste on the conductive substrate. In the above-mentioned nickel electrode for alkaline secondary battery, a conductive layer comprising sodium-containing cobalt oxide is formed on a surface of the active material particles and tungsten powder and/or tungsten compound powder is added on the active material particles.

Abstract: A nickel electrode for alkaline storage battery according to the present invention is formed by applying a paste containing active material particles composed of nickel hydroxide to a conductive substrate and drying said paste, wherein a conductive layer consisting of sodium-containing cobalt oxide is formed on a surface of said active material particles, and titanium powder and/or titanium compound powder is added to the surface of said active material particles, and an alkaline storage battery according to the present invention uses as its positive electrode the above-mentioned nickel electrode for alkaline storage battery.

Abstract: A nickel hydroxide electrode for an alkaline storage battery comprises titanium hydroxide formed on the surface of nickel hydroxide as a main active material impregnated into pores of a porous sintered substrate. An alkaline storage battery comprises a negative electrode and the nickel hydroxide electrode as a positive electrode. The alkaline storage battery provides a high discharge capacity even if the battery is charged under a high temperature atmosphere.

Abstract: A nickel electrode for an alkaline storage battery employed as a positive electrode of an alkaline storage battery is formed by filling an active material into pore of a porous sintered substrate wherein said active material is formed by adhering niobic acid to a surface of nickel hydroxide particles.

Abstract: A nickel electrode for an alkaline storage battery employed as a positive electrode of an alkaline storage battery is formed by applying a paste containing active material particles composed of nickel hydroxide to a conductive substrate and drying said paste, wherein a conductive layer consisting of cobalt oxide containing sodium is formed on a surface of said active material particles, and niobium powder and/or niobium compound powder is added to the surface of said active material particles.

Abstract: The nickel-metal hydride storage battery of this invention includes a nonsintered nickel electrode using, as a positive electrode active material, nickel hydroxide including, as a solid-solution element, at least one element Q selected from the group consisting of Mn, Al, Y, Yb and Co; and a pasted hydrogen-absorbing alloy electrode using, as a negative electrode active material, a hydrogen-absorbing alloy represented by a composition formula, TiaVbNicMd, in which a+b+c=100; 15≦a≦45; 35≦b≦75; 5≦c≦25; 0<d≦7; and M is at least one element selected from the group consisting of Cr, Mn, Mo, Nb, Ta, W, La, Ce, Y, Mm, Co, Fe, Cu, Si, Al, B, Zr and Hf, and the ratio in capacity between the nonsintered nickel electrode and the pasted hydrogen-absorbing alloy electrode is 1:1.1 through 1:1.8. As a result, the invention provides a nickel-metal hydride storage battery having large battery capacity and a long cycle life.

Abstract: A nickel hydroxide electrode for an alkaline storage battery comprises titanium hydroxide formed on the surface of nickel hydroxide as a main active material impregnated into pores of a porous sintered substrate. An alkaline storage battery comprises a negative electrode and the nickel hydroxide electrode as a positive electrode. The alkaline storage battery provides a high discharge capacity even if the battery is charged under a high temperature atmosphere.

Abstract: A sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including Mn as a solid-solution element and having a &ggr; ratio of 65 through 100%; a sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including as an additive or coated with a rare earth element and/or a rare earth compound in a ratio measured based on the rare earth element of 0.05 through 5 wt %; and a sealed alkaline storage battery including, as a positive electrode active material, nickel oxyhydroxide having a half-width of a peak in a lattice plane (003) in an X-ray diffraction pattern of 0.8° or more. The pressure within the battery is not largely increased for a long period of charge-discharge cycles, and hence, the electrolyte hardly leaks.

Abstract: A nickel electrode for alkaline storage battery according to the present invention is formed by applying a paste containing active material particles composed of nickel hydroxide to a conductive substrate and drying said paste, wherein a conductive layer consisting of sodium-containing cobalt oxide is formed on a surface of said active material particles, and titanium powder and/or titanium compound powder is added to the surface of said active material particles, and an alkaline storage battery according to the present invention uses as its positive electrode the above-mentioned nickel electrode for alkaline storage battery.

Abstract: In a positive electrode active material for alkaline storage batteries according to the present invention, a surface of a nickel hydroxide is coated with a mixed crystal material of at least one type of element selected from aluminum Al, manganese Mn, iron Fe, yttrium Y, ytterbium Yb, erbium Er, and gadolinium Gd and cobalt, the valence of nickel in the nickel hydroxide is in the range of 2.0 to 2.3, and the valence of cobalt in the mixed crystal material exceeds 3.0. The positive electrode active material for alkaline storage batteries is used for a positive electrode for alkaline storage batteries, and the positive electrode for alkaline storage batteries is further used for an alkaline storage battery.

Abstract: The nickel electrode for alkaline secondary battery according to the present invention is obtained by applying a paste containing active material particles comprising nickel hydroxide to a conductive substrate and drying the paste on the conductive substrate. In the above-mentioned nickel electrode for alkaline secondary battery, a conductive layer comprising sodium-containing cobalt oxide is formed on a surface of the active material particles and tungsten powder and/or tungsten compound powder is added on the active material particles.

Abstract: In a sintered nickel electrode for alkaline storage battery formed by filling nickel hydroxide as an active material into a porous sintered substrate and an alkaline storage battery using as its positive electrode the sintered nickel electrode for alkaline storage battery, tungstic acid is adhered to a surface of said nickel hydroxide as an active material.

Abstract: A nickel electrode for an alkaline storage battery employed as a positive electrode of an alkaline storage battery is formed by filling an active material into pore of a porous sintered substrate wherein said active material is formed by adhering niobic acid to a surface of nickel hydroxide particles.

Abstract: A nickel electrode for an alkaline storage battery employed as a positive electrode of an alkaline storage battery is formed by applying a paste containing active material particles composed of nickel hydroxide to a conductive substrate and drying said paste, wherein a conductive layer consisting of cobalt oxide containing sodium is formed on a surface of said active material particles, and niobium powder and/or niobium compound powder is added to the surface of said active material particles.

Abstract: A sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including Mn as a solid-solution element and having a &ggr; ratio of 65 through 100%; a sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including as an additive or coated with a rare earth element and/or a rare earth compound in a ratio measured based on the rare earth element of 0.05 through 5 wt%; and a sealed alkaline storage battery including, as a positive electrode active material, nickel oxyhydroxide having a half-width of a peak in a lattice plane (003) in an X-ray diffraction pattern of 0.8° or more. The pressure within the battery is not largely increased for a long period of charge-discharge cycles, and hence, the electrolyte hardly leaks.

Abstract: The positive electrode active material powder of this invention includes &bgr;-nickel hydroxide particles containing aluminum in a ratio of 0.5 through 9 atom % based on the total amount of nickel and aluminum and having a half-width of a peak in a plane (101) in the X-ray powder diffraction pattern of 0.8°/2 &thgr; or more. Owing to this positive electrode active material powder, a nonsintered nickel electrode having high active material utilization and large discharge capacity can be realized.

Abstract: The nickel-metal hydride storage battery of this invention includes a nonsintered nickel electrode using, as a positive electrode active material, nickel hydroxide including, as a solid-solution element, at least one element Q selected from the group consisting of Mn, Al, Y, Yb and Co; and a pasted hydrogen-absorbing alloy electrode using, as a negative electrode active material, a hydrogen-absorbing alloy represented by a composition formula, TiaVbNicMd, in which a+b+c=100; 15≦a≦45; 35≦b≦75; 5≦c≦25; 0<d≦7; and M is at least one element selected from the group consisting of Cr, Mn, Mo, Nb, Ta, W, La, Ce, Y, Mm, Co, Fe, Cu, Si, Al, B, Zr and Hf, and the ratio in capacity between the nonsintered nickel electrode and the pasted hydrogen-absorbing alloy electrode is 1:1.1 through 1:1.8. As a result, the invention provides a nickel-metal hydride storage battery having large battery capacity and a long cycle life.