Method for preparing composite flexible graphite material
AssigneeAdvanced Energy Technology Inc.
InventorsRobert Angelo Mercuri, Jeremy Klug, Matthew George Getz, Thomas William Weber
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Abstract
An improved method enables preparation of articles for a variety of applications, including embossing or otherwise shaping to form a variety of articles. A plurality of thin, preferably resin-impregnated, flexible graphite sheets are arranged to form zones in a composite material having a graded density or other characteristic. Variation of properties between zones in the stock material formed is useful for achieving a desired set of properties in the formation of articles such as those useful in electrochemical fuel cells and double-layer capacitors.
Claims7
A material useful as a substrate for an embossed graphite article, the material comprising a composite of a plurality of graphite sheets which comprise compressed particles of exfoliated graphite, wherein at least one graphite sheet of said plurality has a density that differs by more than 5% from the density of a second graphite sheet of said plurality, the density of said one graphite sheet comprising between 0.1 g/cc up to 1.3 g/cc and the density of said second graphite sheet comprising at least 1.4 g/cc to no more than 1.8 g/cc, and further wherein said one graphite sheet comprises a top layer of said composite and said second graphite sheet comprises a bottom layer of said composite.
Dependencies are inferred from the claim text.