Composite powder for use in the negative electrode of a battery and a battery comprising such a composite powder
US11502290B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2018 |
| Grant date | Nov 15, 2022 |
| Priority date | — |
| Expiry date | Nov 4, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composite powder for use in the negative electrode of a battery, whereby the composite powder comprises composite particles, whereby the composite particles comprise a matrix material and silicon, whereby the composite particles have a particle size distribution having a d10 and a d90, whereby over at least part of the size range from d10 to d90 the composite particles have a size-dependent silicon content. Preferably a finer fraction of the composite powder has an average particle size D1 and a silicon content S1 and a coarser fraction of the composite powder has an average particle size D2 and a silicon content S2, whereby a size dependence factor F is defined as follows F=(S2−S1)/(D2−D1), whereby the absolute value of the size dependence factor F is at least 0.04 wt % silicon/μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.