Metal foil for current collector of secondary battery and method of producing the same
US6878458B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Sep 12, 2002 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Oct 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12431
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A metal foil for a current collector of a secondary battery formed by electrodeposition and has a thickness (T) of 8 to 40 μm, the metal foil satisfying the following formulae:4.9×108≦T×S×Y≦31×1084.5≦ε−(0.0005×T2)≦15where S is a breaking strength (MPa), ε is a tensile elongation (%) and Y is a Young's modulus (MPa).This foil is preferably a nickel foil and is manufactured by softening or annealing the metal foil obtained by electrodeposition. Thereby, a metal foil for a negative electrode of a secondary battery is obtained with an excellent capability of supporting the active material and large electric conductivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.