Electrochemically active dispersions and composites for rechargeable battery anodes
US12148914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2019 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Nov 21, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Particulate dispersions and composites are disclosed which comprise graphite and alloy particles comprising both active (e.g. Si) and inactive phases with regards to electrochemical activity with alkali or alkaline earth metals (e.g. lithium). The alloy particles are highly dispersed as primary particles with graphite particles and/or within the graphite particles' matrix in a novel manner and can be prepared using simple mechanofusion dry processing methods. In the composites prepared, the alloy particles are essentially embedded between layers in the graphite matrix. Improved performance can be obtained when these dispersions or composites are used in lithium insertion anodes for rechargeable lithium batteries, including high capacity, good cycling performance, and rate capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.