Composite particles, manufacturing method thereof, electrode material for secondary battery, and secondary battery
US10873073B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 2012 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Jan 12, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/948
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is positive electrode material for a highly safe lithium-ion secondary battery that can charge and discharge a large current while having long service life. Disclosed are composite particles comprising: at least one carbon material selected from the group consisting of (i) fibrous carbon material, (ii) chain-like carbon material, and (iii) carbon material produced by linking together fibrous carbon material and chain-like carbon material; and lithium-containing phosphate, wherein at least one fine pore originating from the at least one carbon material opens to outside the composite particle. Preferably, the composite particles are coated with carbon. The fibrous carbon material is preferably a carbon nanotube with an average fiber size of 5 to 200 nm. The chain-like carbon material is preferably carbon black produced by linking, like a chain, primary particles with an average particle size of 10 to 100 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.