Rare earth metal-nickel hydrogen storage alloy, method for producing the same, and anode for nickel-hydrogen rechargeable battery
US5964968A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rare earth metal-nickel hydrogen storage alloy having a composition represented by the formula (1) EQU (R.sub.1-x L.sub.x)(Ni.sub.1-y M.sub.y).sub.z (1) (R: La, Ce, Pr, Nd; L: Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, Mg, Ca; M: Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, Si, V, Cr, Nb, Hf, Ta, W, B, C; 0.01.ltoreq.x.ltoreq.0.1; 0.ltoreq.y.ltoreq.0.5; 4.5.ltoreq.z.ltoreq.5.0), the alloy including in an amount of not less than 10 volume % and less than 95 volume % thereof crystals each containing not less than 2 and less than 20 antiphase boundaries extending perpendicular to C-axis of a crystal grain of the alloy per 20 nm along the C-axis, not less than 60% and less than 95% of added amount of said element represented by L in the formula (1) being arranged in antiphase areas, a method for producing the same, and an anode for a nickel-hydrogen rechargeable battery. The anode for a nickel-hydrogen rechargeable battery can improve initial activity, battery capacity, and battery life all at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.