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US 11,142,459 B2Granted
Dense graphene balls for hydrogen storage
AssigneeNanotek Instruments Group, LLC
InventorsAruna Zhamu, Song-Hai Chai, Bor Z. Jang
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AssigneeNanotek Instruments Group, LLC
InventorsAruna Zhamu, Song-Hai Chai, Bor Z. Jang
Estimating the term…
Provided is a powder mass of multiple porous graphene balls, wherein at least one of the porous graphene balls comprises multiple graphene sheets having a catalyst, in a form of nanoparticles or coating having a diameter or thickness from 0.3 nm to 10 nm, bonded to or supported by graphene sheet surfaces, wherein the porous graphene balls have a density from 0.01 to 1.7 g/cm3 (preferably and typically from 0.1 to 1.5 g/cm3), and a specific surface area from 50 to 3,000 m2/g (preferably and typically from 200 to 2,630 m2/g). A method of producing such porous graphene balls is provided as well. Also provided is a gas storage device containing the invented powder mass as a gas-absorbing, gas-adsorbing, gas-capturing, or gas-storing medium to store a gas species therein.
A powder mass of multiple porous graphene balls, wherein at least one of said porous graphene balls comprises multiple graphene sheets having a catalyst, in a form of nanoparticles or coating having a diameter or thickness from 0.3 nm to 10 nm, bonded to or supported by graphene sheet surfaces, wherein said porous graphene balls have a diameter from 100 nm to 100 μm, a physical density from 0.01 to 1.7 g/cm3, and a specific surface area from 50 to 3,000 m2/g and wherein said catalyst is in an amount from 0.01% to 50% by weight of the total graphene ball weight.
Dependencies are inferred from the claim text.