Abstract: A nickel hydride secondary battery houses an electrode group including a positive electrode and a negative electrode which are overlapped with each other via a separator with an alkaline electrolyte solution, the negative electrode includes a hydrogen absorbing alloy, a negative-electrode additive agent, a thickening agent, and a conductive material, and the negative-electrode additive agent includes at least one selected from calcium fluoride, calcium sulfide, and calcium chloride.

Abstract: An alkaline secondary cell has an electrode assembly including a positive electrode, a negative electrode and a separator, and alkaline electrolyte. The negative electrode includes hydrogen-storage alloy and an oxidation inhibitor that inhibits the hydrogen-storage alloy from being oxidized. The oxidation inhibitor contains a chemical compound, and the chemical compound includes a chemical-bond-formation end that is chemically bonded to the surface of the hydrogen-storage alloy and a water-repellent end having water repellency.

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

Abstract: A negative electrode for a nickel-hydrogen rechargeable battery is a strip-shaped negative electrode, the negative electrode being formed of a core body and a negative mixture layer covering the core body and containing hydrogen-storage alloy particles, including a main section, both sides of which face the positive electrode with the separator intervening therebetween as viewed in a rolled state where the negative electrode forms the electrode group with the positive electrode and the separator, and an outermost circumferential portion and an innermost circumferential portion that are protruding from ends of the main section in a rolling direction and facing the positive electrode with the separator intervening therebetween only with one side, wherein the hydrogen-storage alloy particles contained in the outermost circumferential portion and the innermost circumferential portion have an average diameter larger than an average diameter of the hydrogen-storage alloy particles contained in the main section.

Abstract: An alkaline secondary cell has an electrode assembly including a positive electrode, a negative electrode and a separator, and alkaline electrolyte. The negative electrode includes hydrogen-storage alloy and an oxidation inhibitor that inhibits the hydrogen-storage alloy from being oxidized. The oxidation inhibitor contains a chemical compound, and the chemical compound includes a chemical-bond-formation end that is chemically bonded to the surface of the hydrogen-storage alloy and a water-repellent end having water repellency.

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 nickel metal hydride secondary battery includes hydrogen storage alloy particles in a negative electrode. The hydrogen storage alloy has a composition expressed by a general formula (LaaSmbGdc“A”d)1-wMgwNixAly“T”z, where “A” and “T” each represent at least one element selected from a group consisting of Pr, Nd, etc., and a group consisting of V, Nb, etc., respectively; subscripts a, b, c and d satisfy relationship expressed by a>0, b?0, c>0, 0.1>d?0, and a+b+c+d=1; and subscripts w, x, y and z fall in a range expressed by 0.1?w?0.3, 0.05?y?0.35, 0?z?0.5, and 3.2?x+y+z?3.8.

Abstract: The negative electrode of an alkaline storage cell contains a rare earth-Mg—Ni hydrogen storage alloy. The rare earth-Mg—Ni hydrogen storage alloy has a composition expressed by a general formula: (A?Ln1-?)1-?Mg?Ni?-?-?Al?T? wherein A represents one or more elements selected from the group consisting of Pr, Nd, Sm and Gd and including at least Sm, Ln represents at least one element selected from the group consisting of La, Ce, and the like, T represents at least one element selected from the group consisting of V, Nb, and the like, and subscripts ?, ?, ?, ? and ? represent numerical values which respectively satisfy 0.4??, 0.05<?<0.15, 3.0???4.2, 0.15???0.30 and 0???0.20.

Abstract: A nickel metal hydride battery includes particles of hydrogen storage alloys in the negative electrode. Such hydrogen storage alloys have a composition expressed by a general formula: (LaaSmbAc)1-wMgwNixAlyTz. In the formula, A and T denote at least one element selected from the groups consisting of: Pr, Nd, and the like; and V, Nb, and the like, respectively, the subscripts a, b, and c satisfy the relationship given by: a>0; b>0; 0.1>c?0; and a+b+c=1, and the subscripts w, x, y, and z fall within the range given by: 0.1<w?1; 0.05?y?0.35; 0?z?0.5; and 3.2?x+y+z?3.8.