Rare earth metal-nickel hydrogen storage alloy, a method for producing the same, and anode for nickel-hydrogen rechargeable battery
US6261517A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Mar 1, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rare earth metal-nickel hydrogen storage alloy of a composition represented by the formula: EQU RNi.sub.a Mn.sub.b Co.sub.c Al.sub.d X.sub.e PA1 (R stands for one or more rare earth elements including Sc and Y, not less than 95 atom % of which is one or more elements selected from the group consisting of La, Ce, Pr, and Nd; X stands for one or more elements selected from the group consisting of Fe, Cu, Zn, V, and Nb; a, b, c, d, and e satisfy the relations of 3.9.ltoreq.a<6.0, 0.45.ltoreq.b<1.5, 0.01.ltoreq.c<0.3, 0.4.ltoreq.d.ltoreq.1, 0.ltoreq.e.ltoreq.0.2, and 5.2.ltoreq.a+b+c+d+e.ltoreq.7.5), the alloy having a matrix of CaCu.sub.5 structure, and a Mn-rich secondary phase of 0.3 to 5 .mu.m finely dispersed in the matrix at surface ratio of 0.3 to 7%; a method for producing the same; and an anode for a nickel-hydrogen rechargeable battery containing as anode material the hydrogen storage alloy and an electrically conductive material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.