High Monolayer Yield Graphene and Methods for Making the Same
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United States of America Patent
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Nov 3, 2016
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Apr 29, 2015
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Apr 29, 2015
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Abstract
A method of making graphene powders by electrochemical exfoliating graphite contains steps of: A. Fabricating a plurality of graphene rods and B. Electrochemical exfoliating the plurality of graphite rods. In step of A includes sub steps of: a1. Mixing vein graphite with polymer binder; a2. Compressing with a mould to prepare the plurality of graphite rods; and a3. Annealing at 500 C to graphitize remove the polymer binder from the plurality of graphite rods. In step of B. includes sub steps of: b1. Mounting electrodes on plural chips; b2. Adding electrolyte and applying 10V between the plurality of graphite rods and a conductive cathode on the plural chips for 1 hour; and b3. Filtering and repeatedly washing powders on the plurality of graphite rods with water and an organic solvent, and then drying the powders, thus producing graphene powders with preferably high monolayer yield.
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