Highly conductive graphitic films
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United States of America Patent
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May 1, 2018
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N/A
app pub date -
Jun 1, 2016
filing date -
Mar 20, 2014
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Abstract
A flexible graphene platelet-filled composite film comprising a carbon or graphitic matrix and 1% to 99% weight fraction of graphene platelets dispersed in the matrix, wherein the graphene platelets are aligned along planar directions of said film and are selected from pristine graphene, oxidized graphene, reduced graphene oxide, fluorinated graphene, hydrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof, and wherein the carbon or graphitic matrix is obtained by carbonizing a carbon precursor polymer at a carbonization temperature of at least 300° C. or by carbonizing and graphitizing the carbon precursor polymer at a final graphitization temperature higher than 1,500° C., and the graphitic matrix comprises graphene layers that are substantially oriented parallel to one another with an inclination angle between two graphene layers less than 5 degrees. The film is thermally and electrically conductive, and can be used to dissipate heat in an electronic device or device housing.
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