Spherical carbon allotropes for lubricants

US11380521B2 · kind B2 · utility

Assignee

• LYTEN, INC. · US

Inventors

• Bryce H. Anzelmo · Mountain View, US
• Daniel Cook · Woodside, US
• Hossein-Ali Ghezelbash · Santa Clara, US
• Shreeyukta Singh · San Jose, US
• Michael W. Stowell · Sunnyvale, US
• David Tanner · San Jose, US

Key dates

• Filing date: Aug 5, 2019
• Grant date: Jul 5, 2022
• Expiry date: May 20, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J2237/334
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Carbon materials having carbon aggregates, where the aggregates include carbon nanoparticles and no seed particles, are disclosed. In various embodiments, the nanoparticles include graphene, optionally with multi-walled spherical fullerenes and/or another carbon allotrope. In various embodiments, the nanoparticles and aggregates have different combinations of: a Raman spectrum with a 2D-mode peak and a G-mode peak, and a 2D/G intensity ratio greater than 0.5, a low concentration of elemental impurities, a high Brunauer-Emmett and Teller (BET) surface area, a large particle size, and/or a high electrical conductivity. Methods are provided to produce the carbon materials.