Lithium secondary battery
US6569557B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1999 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Sep 9, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary battery includes: an internal electrode body including a positive electrode, a negative electrode, and a separator, the positive electrode and the negative electrode being wound or laminated via the separator, and an organic electrolyte. The active material used in the positive electrode satisfies the following relation between the average particle diameter R (&mgr;m) and the specific surface area S (m2/g):6≦R×S≦50The amount of the acetylene black added to the positive electrode active material satisfies the following relation with the specific surface area of the positive electrode active material:S≦W≦S+5 (W≦10)(W is the amount of the acetylene black added to the positive electrode active material, expressed in % by weight based on the amount of the active material, and S is expressed in m2/g.) In this battery, the electron conductivity is improved, and the internal resistance is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.