Patent ID: 9561955
Date: 2017-02-07
CPC Classifications: B82Y,H01B,Y10T

Claim:
1. A graphene composite thin film composition composed of nano graphene platelets (NGPs) that are dispersed in a polymer matrix of graphene oxide and bonded by a graphene oxide binder, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335 nm to 100 nm, and said NGPs occupy a weight fraction of 1% to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1%-40% by weight based on the total graphene oxide weight, occupies a weight fraction of 0.1% to 99% of the total composite weight, and wherein said composite contains NGPs that are chemically bonded together by graphene oxide molecules and said composite contains chemically merged graphene oxide molecules and forms a thin film that is essentially pore-free and has a physical density greater than 1.4 g/cm 3 and a thickness no greater than 1 mm, and said thin film has an in-plane thermal conductivity greater than 600 Wm −1 K −1 and an in-plane electrical conductivity greater than 2,000 S/cm.