High-density 3D graphene-based monolith and related materials, methods, and devices

US9601226B2 · kind B2 · utility

Assignee

• Lawrence Livermore National Security, LLC · US

Inventors

• Marcus A. Worsley · Hayward, US
• Theodore F. Baumann · Discovery Bay, US
• Juergen Biener · San Leandro, US
• Supakit Charnvanichborikarn · Livermore, US
• Sergei O. Kucheyev · Oakland, US
• Elizabeth Montalvo · Oakland, US
• Swanee Shin · Emeryville, US
• Elijah Tylski · Platte City, US

Key dates

• Filing date: Mar 15, 2013
• Grant date: Mar 21, 2017
• Expiry date: Aug 13, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/40
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A composition comprising at least one high-density graphene-based monolith, said monolith comprising a three-dimensional structure of graphene sheets crosslinked by covalent carbon bonds and having a density of at least 0.1 g/cm3. Also provided is a method comprising: preparing a reaction mixture comprising a suspension and at least one catalyst, said suspension selected from a graphene oxide (GO) suspension and a carbon nanotube suspension; curing the reaction mixture to produce a wet gel; drying the wet gel to produce a dry gel, said drying step is substantially free of supercritical drying and freeze drying; and pyrolyzing the dry gel to produce a high-density graphene-based monolith. Exceptional combinations of properties are achieved including high conductive and mechanical properties.