Hydrogen-absorbing alloy, electrode and secondary battery
US6214492A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided a hydrogen-absorbing alloy comprising at least one crystal phase consisting essentially of at least one unit cell which has a laminate structure comprising at least one A.sub.2 B.sub.4 subcell and at least one AB.sub.5 subcell, and the aforementioned at least one unit cell satisfying the following formula (1), EQU 0.5<X<1 (1) PA1 wherein A is at least one kind of element which is capable of generating heat of formation .DELTA.H (kJ/mol) of less than 20 kJ/mol at the occasion of generating a hydride from one mole of hydrogen at a temperature of 25.degree. C., B is at least one kind of element which is capable of generating heat of formation .DELTA.H (kJ/mol) of not less than 20 kJ/mol at the occasion of generating a hydride from one mole of hydrogen at a temperature of 25.degree. C., and X is a ratio in number of the aforementioned at least one A.sub.2 B.sub.4 subcell to the aforementioned at least one AB.sub.5 subcell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.