Abstract: A hydrogen absorbing alloy is provided that is represented by the general formula Ln1-xMgxNiyAz, where: Ln is at least one element selected from the group consisting of Ca, Zr, Ti, and rare-earth elements including Y; A is at least one element selected from the group consisting of Co, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P, and B; and x, y, and z satisfy the following conditions 0.05?x?0.25, 0<z?1.5, and 2.8?y+z?4.0, wherein Ln contains 20 mole % or more of Sm.

Abstract: A hydrogen absorbing alloy represented by the formula Ln1?xMgxNiy?aAla (where Ln is at least one element selected from rare earth elements, 0.05?x<0.20, 2.8?y?3.9 and 0.10?a?0.25) which is used for an alkaline storage battery.

Abstract: Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.

Abstract: An alkaline storage battery has a negative electrode using a hydrogen-absorbing alloy represented by a general formula Ln1-xMgxNiyAz wherein Ln is at least one element selected from rare-earth elements including Y, Ca, Zr, and Ti, A is at least one element selected from Co, Fe, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B, and 0.15?x?0.30, 0<z?1.5, and 2.8?y+z?4.0 are satisfied. The hydrogen-absorbing alloy has a hexagonal system crystal structure or a rhombohedral system crystal structure as its main phase and has a subphase of line which average number of not less than 50 nm in thickness existing in the range of 10 ?m×10 ?m in the cross section of the main phase is 3 or less.

Abstract: An alkaline storage battery having a positive electrode (1), a negative electrode (2), and an alkaline electrolyte solution, and the negative electrode having fluorinated oil being present on the surface thereof. The negative electrode includes a hydrogen-absorbing alloy represented by the general formula Ln1-xMgxNiy-a-bAlaMb, where Ln is at least one element selected from Zr, Ti, and a rare-earth element including Y; M is at least one element selected from the group consisting of V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, and B; 0.05?x?0.30; 0.05?a?0.30; 0?b?0.50; and 2.8?y?3.9.

Abstract: A hydrogen-absorbing alloy is represented by the general formula Ln1-xMgxNiy-a-bAlaMb (where Ln is at least one element selected from the rare-earth elements, Zr, Ti, and Y, M is at least one element selected from the group consisting of V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, B, and Zr, 0.05?x?0.35, 0.05?a?0.30, 0?b?0.5, and 2.5?y<3.3). The Ln in the general formula includes Sm as its main component, and the hydrogen-absorbing alloy has an electrochemical capacity of 300 mAh/g or greater. An alkaline storage battery containing a negative electrode containing the hydrogen absorbing alloy.

Abstract: A negative electrode for alkaline storage battery using a hydrogen-absorbing alloy includes fluorinated oil and a surface active agent.

Abstract: A hydrogen-absorbing alloy for a negative electrode in an alkaline storage battery includes a first hydrogen-absorbing alloy and a second first hydrogen-absorbing alloy. The first hydrogen-absorbing alloy contains at least a rare-earth element, Mg, Ni, and Al, and has an intensity ratio IA/IB of 0.1 or greater in X-ray diffraction analysis using Cu—K? radiation as an X-ray source, where IA is the strongest peak intensity that appears in the range of 2?=31° to 33°, and IB is the strongest peak intensity that appears in the range of 2?=40° to 44°. The second hydrogen-absorbing alloy has a Co content greater than that of the first hydrogen-absorbing alloy.

Abstract: An alkaline storage battery including a positive electrode (1), a negative electrode (2) using a hydrogen-absorbing alloy, and an alkaline electrolyte solution employs, as the hydrogen-absorbing alloy in the negative electrode, a hydrogen-absorbing alloy for alkaline storage batteries including at least a rare-earth element, magnesium, nickel, and aluminum, and having an intensity ratio IA/IB of 1.00 or greater, wherein IA is the strongest peak intensity appearing in the range 2?=32°-33° and IB is the strongest peak intensity appearing in the range 2?=35°-36° in an X-ray diffraction analysis using Cu- K? radiation as the X-ray source.

Abstract: An alkaline storage battery has a positive electrode, a negative electrode utilizing hydrogen-absorbing alloy, and an alkaline electrolyte, and wherein the negative electrode contains a hydrogen-absorbing alloy represented by the general formula Ln1-xMgxNiy-a-bAlaMb, where Ln is at least an element selected from rare-earth elements including Y and Zr and Ti, M is at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P and B, 0.05?x?0.30, 0.05?a?0.30, 0?b?0.50 and 2.8?y?3.9 and fluorine resins having an average molecular weight of 1,000,000 or less.

Abstract: A hydrogen absorbing alloy is provided that is represented by the general formula Ln1-xMgxNiyAz, where: Ln is at least one element selected from the group consisting of Ca, Zr, Ti, and rare-earth elements including Y; A is at least one element selected from the group consisting of Co, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P, and B; and x, y, and z satisfy the following conditions 0.05?x?0.25, 0<z?1.5, and 2.8?y+z?4.0, wherein Ln contains 20 mole % or more of Sm.

Abstract: A hydrogen-absorbing alloy for alkaline storage battery which is produced by a rapid cool using a rapid quenching method and whose component is represented by a general formula Ln1-xMgxNia-b-cAlbZc is used for a negative electrode of an alkaline storage battery.

Abstract: A hydrogen absorbing alloy containing at least a rare-earth element, magnesium (Mg), nickel (Ni) and aluminum (Al), having an intensity ratio (IA/IB) of not smaller than 0.6 (where IA represents an intensity of the highest peak in a range of 2?=30°˜34° in the X-ray diffraction pattern using CuK?-radiation as the X-ray source and IB represents the intensity of the highest peak in a range of 2?=40°˜44°), and not substantially including La as the rare-earth element.

Abstract: A hydrogen-absorbing alloy for alkaline storage battery which is produced by a rapid cool using a rapid quenching method and whose component is represented by a general formula Ln1-xMgxNia-b-cAlbZc is used for a negative electrode of an alkaline storage battery.

Abstract: Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.

Abstract: An alkaline storage battery having a negative electrode made from a hydrogen absorbing alloy represented by the formula Ln1-xMgxNiy-aMa (where Ln is at least one element selected from rare earth elements, M is at least one element selected from the group consisting of Al, V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si and P, 0.05?x<0.20, 2.8?y?3.9 and 0.10?a?0.50) and carbon as a conductive agent, a positive electrode of nickel hydroxide as an active material, and an alkaline electrolyte, and the alkaline storage battery contains not greater than 0.01 weight % of hydrogen or not greater than 0.13 weight % of water in the hydrogen absorbing alloy when the battery is activated and is discharged to 1.0 V at one hour rate (It).

Abstract: Conductivity of a negative electrode is improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing a hydrogen-absorbing alloy containing at least a rare-earth element, nickel, magnesium, and aluminum, to sufficiently enhance the cycle life of the alkaline storage battery. The negative electrode of the alkaline storage battery uses a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least a rare-earth element, nickel, magnesium, and aluminum. A surface layer is formed on the hydrogen-absorbing alloy particles, the surface layer having a weight ratio of aluminum to nickel less than that of the interior portion of the hydrogen-absorbing alloy. The weight ratio of aluminum to nickel in the surface layer is 0.015 or less.

Abstract: An alkaline storage battery provided with a positive electrode (1), a negative electrode (2), and an alkaline electrolyte solution employs a hydrogen-absorbing alloy containing: at least a rare-earth element, magnesium, nickel, and aluminum, the hydrogen-absorbing alloy being represented by the general formula Ln1-xMgxNiy-a-bAlaMb, where: Ln is at least one element selected from the group consisting of Ti, Zr, and a rare-earth element including Y; M is at least one element selected from the group consisting of V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, B, and Zr; 0.05?x?0.35; 0.05?a?0.30; 0?b?0.5; 2.8?y-a-b?3.9; and the hydrogen-absorbing alloy having a main phase composed of a uniform metal phase with a uniform composition that has an area percentage of 60% or greater.

Abstract: A nickel-hydrogen storage battery provided with a positive electrode, an alkaline electrolyte solution, and a negative electrode containing a hydrogen-absorbing alloy represented by the general formula RE1-xMgxNiyAlzMa, where RE is at least one element selected from the group consisting of Zr, Hf, and a rare-earth element including Y; M is an element other than the group IA elements, the group VIIB elements, the group 0 elements, the RE, Mg, Ni, and Al; 0.10?x?0.30; 2.8?y?3.6; 0<z?0.30; and 3.0?y+z+a?3.6, a zirconium compound being added to the negative electrode.

Abstract: Middle point voltage of discharge is increased and at the same time cycle life improved in a nickel-metal hydride storage battery having a negative electrode utilizing a rare earth-nickel hydrogen-absorbing alloy containing Mg and the like and having a crystal structure other than a CaCu5 structure. A nickel-metal hydride storage battery contains a positive electrode (1), a negative electrode (2) including a hydrogen-absorbing alloy, and an alkaline electrolyte solution. The hydrogen-absorbing alloy contains at least a rare-earth element, magnesium, nickel, and aluminum, and has an intensity ratio IA/IB of 0.1 or greater as determined by X-ray diffraction analysis using Cu-K? radiation as an X-ray source, where IA is the strongest peak intensity that appears in the range of 20=30° to 34°, and IB is the strongest peak intensity that appears in the range of 2?=40° to 44°. The negative electrode contains a cobalt compound.