| 摘要 |
PCT No. PCT/JP96/00916 Sec. 371 Date Nov. 27, 1996 Sec. 102(e) Date Nov. 27, 1996 PCT Filed Apr. 3, 1996 PCT Pub. No. WO96/31633 PCT Pub. Date Oct. 10, 1996A rare earth metal-nickel hydrogen storage alloy having a composition represented by the formula (1)RNix-yMy(1)(wherein R stands for La, Ce, Pr, Nd, or mixtures thereof, M stands for Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, Si, V, Cr, Nb, Hf, Ta, W, B, C, or mixtures thereof, x satisfies the formula of 3.5</=x<5, and y satisfies the formula of 0<y</=2, crystals in the alloy having a LaNi5 type single phase structure, the alloy including in an amount of not less than 5 volume % and less than 95 volume % thereof crystals each containing not less than 2 and less than 17 antiphase boundaries extending perpendicular to C-axis of a grain of the crystal in the alloy per 20 nm along the C-axis, a method of producing the same, and an anode for a nickel hydrogen rechargeable battery containing as an anode material the above rare earth metal-nickel hydrogen storage alloy and an electrically conductive material. This anode can improve the initial activity, the battery capacity, and the battery life at the same time.
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