US 10,766,773 B2 · Graphite sheet having excellent thermal conductivity and method for preparing the same

Abstract

The present invention provides a method for preparing a high-performance graphite sheet by imidizing a polyamic acid resulting from a reaction of dianhydride monomer(s) and diamine monomer(s) to obtain a polyimide film; and carbonizing and/or graphitizing the polyimide film to obtain a high-performance graphite sheet, where the polyimide film contains 2 or more fillers having different average particle diameters, and the thermal conductivity of the graphite sheet is at least 1,400 W/m·K. Further, the present invention provides a graphite sheet obtained by the above method.

Claims9

Dependent claims

A method for preparing a high-performance graphite sheet, comprising:

providing a polyimide film containing a first filler having an average particle diameter of 2.0 μm to 2.5 μm, and a second filler having an average particle diameter of 1.0 μm to 1.6 μm;
and
carbonizing and graphitizing the polyimide film to obtain the graphite sheet,
wherein the thermal conductivity of the graphite sheet is at least 1,400 W/m·K.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/858,604Filed 29 Dec 2017

Priority

KR 10-2017-014991610 Nov 2017

Published

US 2019/0144286 A116 May 2019

Granted

8 Sep 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

C01B 32/205
Graphite: preparation
C07C 233/00
Carboxylic acid amides
C01B 2204/04
Structure or properties of graphene: specific amount of layers or specific thickness
C01B 2204/24
Graphene characterized by its properties: thermal properties

Graphite sheet having excellent thermal conductivity and method for preparing the same

Life of this patent

Graphite sheet having excellent thermal conductivity and method for preparing the same

Life of this patent

Abstract

Claims9