Patent ID: 8916239
Filing Date: 2014-12-23
Classification: B05D,C01B,Y10T

Abstract:
1. A method for preparing a flexible graphite sheet, comprising steps of: coating an augmenting solution on a first film to form a composite structure, wherein the augmenting solution is selected from the group consisting of polyimide solution and graphene, wherein the first film is a polyimide film, a carbonized polyimide film, or a pyrolytic graphite film; and performing a heating process on the composite structure such that the augmenting solution and the first film form a flexible graphite sheet, wherein the thermal conducting cross-section of the flexible graphite sheet is larger than the thermal conducting cross-section of the first film, and the thermal conductivity of the flexible graphite sheet is in a range from 1200 to 6000 W/m° C., wherein the heating process is performed in a stepwise manner, with a first increment rate not larger than 2° C./min from room temperature to 1000° C. and a second increment rate not larger than 10° C./min from 1000° C. to 2800° C.