Unitary graphene matrix composites containing carbon or graphite fillers
First Claim
1. A unitary graphene matrix composite comprising:
- (a) A unitary graphene matrix containing closely packed and chemically bonded graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content of 0.001% to 10% by weight, which unitary graphene matrix is obtained from heat-treating a graphene oxide gel at a temperature higher than 100°
C. and contains no discrete graphene platelets derived from said graphene oxide gel; and
(b) A carbon or graphite filler phase selected from a carbon or graphite fiber, carbon or graphite nano-fiber, carbon nano-tube, carbon nano-rod, meso-phase carbon particle, meso-carbon micro-bead, exfoliated graphite flake with a thickness greater than 100 nm, exfoliated graphite or graphite worm, coke particle, needle coke, carbon black or acetylene black particle, activated carbon particle, or a combination thereof;
wherein said carbon or graphite filler phase occupies a weight fraction of 0.01% to 99% based on the total composite weight and said carbon or graphite filler phase is in a particulate, filamentary, or rod-like form dispersed in said unitary graphene matrix.
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Abstract
A unitary graphene matrix composite comprising: (a) a unitary graphene matrix containing an oxygen content of 0.001% to 10% by weight, obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C. and contains no discrete graphene platelets derived from the graphene oxide gel; (b) a carbon or graphite filler phase selected from carbon or graphite fiber, carbon or graphite nano-fiber, carbon nano-tube, carbon nano-rod, meso-phase carbon particle, meso-carbon micro-bead, exfoliated graphite flake with a thickness greater than 100 nm, exfoliated graphite or graphite worm, coke particle, needle coke, carbon black or acetylene black particle, activated carbon particle, or a combination thereof. The carbon or graphite filler phase is preferably in a particulate, filamentary, or rod-like form dispersed in and bonded by the unitary graphene matrix. This composite exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface hardness, and scratch resistance.
29 Citations
45 Claims
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1. A unitary graphene matrix composite comprising:
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(a) A unitary graphene matrix containing closely packed and chemically bonded graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content of 0.001% to 10% by weight, which unitary graphene matrix is obtained from heat-treating a graphene oxide gel at a temperature higher than 100°
C. and contains no discrete graphene platelets derived from said graphene oxide gel; and(b) A carbon or graphite filler phase selected from a carbon or graphite fiber, carbon or graphite nano-fiber, carbon nano-tube, carbon nano-rod, meso-phase carbon particle, meso-carbon micro-bead, exfoliated graphite flake with a thickness greater than 100 nm, exfoliated graphite or graphite worm, coke particle, needle coke, carbon black or acetylene black particle, activated carbon particle, or a combination thereof; wherein said carbon or graphite filler phase occupies a weight fraction of 0.01% to 99% based on the total composite weight and said carbon or graphite filler phase is in a particulate, filamentary, or rod-like form dispersed in said unitary graphene matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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33. A unitary graphene matrix composite comprising:
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(a) A unitary graphene matrix containing graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content less than 1% by weight, which unitary graphene matrix is obtained from heat-treating a graphene oxide gel at a temperature higher than 500°
C. and contains no discrete graphene platelets derived from said graphene oxide gel;(b) A carbon or graphite filler phase selected from a carbon or graphite fiber, carbon or graphite nano-fiber, carbon nano-tube, carbon nano-rod, meso-phase carbon particle, meso-carbon micro-bead, exfoliated graphite flake with a thickness greater than 100 nm, exfoliated graphite or graphite worm, coke particle, needle coke, carbon black or acetylene black particle, activated carbon particle, or a combination thereof; wherein said carbon or graphite filler phase occupies a weight fraction from 1% to 90% based on the total composite weight and said carbon or graphite filler phase is in a particulate, filamentary, or rod-like form dispersed in said unitary graphene matrix which forms a continuous phase.
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Specification