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Rare earth metal-nickel-based hydrogen storage alloy, method for producing the same, and negative electrode for nickel-metal hydride secondary battery
Rare earth metal-nickel-based hydrogen storage alloy, method for producing the same, and negative electrode for nickel-metal hydride secondary battery
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机译:稀土金属镍基储氢合金,其制造方法以及镍氢氢化物二次电池用负极
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摘要
A rare earth metal/nickel-base hydrogen absorbing alloy having a composition represented by formula (1): (R1-x Lx )(Ni1-y My )z , (wherein R represents La, Ce, Pr, or Nd; L represents Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, Mg, or Ca; and M represents Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, Si, V, Cr, Nb, Hf, Ta, W, B, or C; 0,01 x 0.1; 0 y 0.5; and 4.5 z 5.0), wherein the content of crystals with the number of reversed-phase boundaries present perpendicularly to the C axis of crystal grains in the alloy being 2 to less than 20 per 20 nm in the direction of the C axis is 10 to less than 95 vol.% and the amount of L in the formula (I) present in the reversed-phase region is 60 to less than 95 % of the amount of L added. The negative electrode for the nickel-hydrogen secondary battery can simultnaneously improve all of the initial activity, battery capacity, and battery life.
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机译:具有由式(1)表示的组成的稀土金属/镍基吸氢合金:(R1-x Lx)(Ni1-y My)z(其中R代表La,Ce,Pr或Nd; L代表Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y,Sc,Mg或Ca; M表示Co,Al,Mn,Fe,Cu,Zr,Ti,Mo,Si,V,Cr, Nb,Hf,Ta,W,B或C; 0.01 x 0.1; 0 y 0.5;和4.5 z 5.0),其中具有反相边界数量的晶体含量垂直于晶体C轴在C轴方向上,合金中每20nm的2至小于20的晶粒为10至小于95体积%,并且存在于反相区域中的式(I)中的L的量为60至70。少于L添加量的95%。镍氢二次电池的负极可同时改善所有初始活性,电池容量和电池寿命。
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