Positive-electrode material for a lithium ion secondary battery and manufacturing method of the same
US8597835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2012 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | May 16, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a positive electrode material for a safe, high capacity, long lifetime lithium ion secondary battery capable of large current charging and discharging. The positive electrode material contains between 5% by mass or more and 30% by mass or less of a carbon black composite formed by joining together fibrous carbon and carbon black wherein ash is 1.0% or less by mass in accordance with JIS K 1469 and the remainder includes olivine-type lithium iron phosphate, and volatile oxygen-containing functional groups which constitutes 1.0% or less by mass of the positive electrode material. The fibrous carbon is preferably a nanotube having a fiber diameter of 5 nm or more and 50 nm or less and a specific surface area between 50 m2/g or more and 400 m2/g or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.