Patent ID: 9533889
Date: 2017-01-03
CPC Classifications: B82Y,C01B,C01P,C30B,Y10S,Y10T

Claim:
1. A unitary graphene oxide layer or graphene oxide single crystal containing closely packed and chemically bonded parallel graphene oxide planes having an inter plane spacing of 0.335 to 0.40 nm, a thickness greater than 10 nm, an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 W/mK, and a physical density greater than 1.8 g/cm3, and an oxygen content of 0.01% to 10% by weight, which unitary graphene oxide layer or graphene oxide single crystal is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C., wherein an average mis-orientation angle between two graphene oxide planes is less than 10 degrees.