Lawrence Livermore National Security, LLC

Swanee Shin

Sergei Kucheyev

Marcus A Worsley

Theodore F Baumann

Juergen Biener

Elizabeth Montalvo

Supakit Charnvanichborikarn

Elijah Tylski

A method and system for providing at least one of planarization, densification, and exfoliation of a porous material using ion beams. The method may use an ion beam generator to generate an ion beam, the ion beam having energy above 0.1 MeV. The ion beam generator may irradiate the surface of a porous material with the ion beam to produce at least one of planarization, densification, and exfoliation of the porous material.

Planarization, densification, and exfoliation of porous materials by high-energy ion beams

Disclosed here is a composition comprising at least one high-density carbon-nanotube-based monolith, said monolith comprising carbon nanotubes crosslinked by nanoparticles and having a density of at least 0.2 g/cm. Also provided is a method for making the composition comprising: preparing a reaction mixture comprising a suspension and at least one catalyst, said suspension is 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 the composition comprising a high-density carbon-nanotube-based monolith. Exceptional combinations of properties are achieved including high conductive and mechanical properties.

High-density carbon nanotube-based monolith and related materials, methods, and devices

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/cm. 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.

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

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Emeryville, CA, United States of America

Swanee Shin