Process for producing porous graphene particulate-protected anode active materials for lithium batteries
US11152620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2018 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Apr 25, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An process for producing multiple porous graphene particulates for a lithium battery anode, the process comprising: (a) preparing a graphene dispersion having multiple anode material particles, multiple sheets of a starting graphene material, and a blowing agent dispersed in a liquid medium, wherein the blowing agent-to-graphene material weight ratio is from 0.01/1.0 to 1.0/1.0; (b) dispensing, forming and drying the graphene dispersion into multiple droplets containing therein graphene sheets, particles of the anode active material, and the blowing agent; and (c) heat treating the droplets at a heat treatment temperature selected from 80° C. to 3,200° C. at a desired heating rate sufficient to induce volatile gas molecules from the non-carbon elements or to activate the blowing agent for producing the multiple porous graphene particulates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.