Low porosity electrodes for rechargeable batteries
US10862121B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 6, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Dec 6, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode for a rechargeable battery comprising at least 95% active cathode material with an electrode loading of at least 6 mg/cm2, and preferably at least 10 mg/cm2, and an electrode porosity of less than 2%, and preferably less than 1%. The active cathode material may comprise a bimodal composition wherein at least 70% consists of a first lithium cobalt based oxide powder having an average particle size (D50) of at least 25 μm and a BET value <0.2 m2/g, and a second lithium transition metal oxide based powder having the formula Li1+bN1−bO2, wherein 0.10≤b≤0.25, and N=NixMnyCo2Ad, wherein 0.10≤x≤0.40, 0.30≤y≤0.80, 0≤z≤0.20 and 0≤d≤0.10, A being a dopant, the second powder having an average particle size (D50) of less than 10 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.