Rare earth metal nickel hydride storage alloy, its manufacturing method, and negative electrode for nickel hydride secondary battery

摘要

The composition of (R: La, CE, PR, Nd, mixed elements, M: CO, Al, Mn, Fe, Cu, Zr, Ti, Mo, Si, V, Cr, Nb, HF, Ta, W, B, C, and these mixed elements, 3.5. Ltoreq. X 5, 0 y u2266 2) showed that the crystal in the alloy was a LaNi5 type single-phase structure, and c-axis and the grain of the crystal grains in the alloy. A rare earth metal nickel hydride storage alloy containing at least two or more capacitors per 20 nm in the direction of C axis and having less than 17 per 20 nm in the direction of the c axis and having less than 17% and less than 95% by volume, the method of producing the rare earth metal nickel hydride storage alloy and the conductive agent Anode for nickel hydrogen secondary battery included as negative electrode material. This negative electrode can improve both initial activity, battery capacity and lifetime.