Graphite materials, and methods for fabricating and use thereof
US12060274B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 8, 2019 |
| Grant date | Aug 13, 2024 |
| Priority date | — |
| Expiry date | Jan 24, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Cellulose nanofibers (CNF) act as a dispersing agent to directly exfoliate graphite in an aqueous solution using sonication. The resulting suspension has graphite flakes, each having 2-20 monolayers, a relatively large lateral dimension, and a plurality of CNF decorating its surfaces and edges. The dispersing effect of the CNF allows the graphite-CNF suspension to be stored without degradation until desired use. The graphite-CNF suspension can be used to form various composite structures, such as by spraying, coating, pouring, extruding, or printing the suspension, and then drying the suspension. The resulting composite structures have improved tensile strength and toughness due to hydrogen bond interactions between the CNF and graphite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.