Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications

Zhamu, Aruna; Shi, Jinjun; Guo, Jiusheng; Jang, Bor Z

Title: Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications

Patent · Tue May 20 00:00:00 EDT 2014

OSTI ID:1132265

Zhamu, Aruna; Shi, Jinjun; Guo, Jiusheng; Jang, Bor Z

An electrically conductive laminate composition for fuel cell flow field plate or bipolar plate applications. The laminate composition comprises at least a thin metal sheet having two opposed exterior surfaces and a first exfoliated graphite composite sheet bonded to the first of the two exterior surfaces of the metal sheet wherein the exfoliated graphite composite sheet comprises: (a) expanded or exfoliated graphite and (b) a binder or matrix material to bond the expanded graphite for forming a cohered sheet, wherein the binder or matrix material is between 3% and 60% by weight based on the total weight of the first exfoliated graphite composite sheet. Preferably, the first exfoliated graphite composite sheet further comprises particles of non-expandable graphite or carbon in the amount of between 3% and 60% by weight based on the total weight of the non-expandable particles and the expanded graphite. Further preferably, the laminate comprises a second exfoliated graphite composite sheet bonded to the second surface of the metal sheet to form a three-layer laminate. Surface flow channels and other desired geometric features can be built onto the exterior surfaces of the laminate to form a flow field plate or bipolar plate. The resulting laminate has an exceptionally high thickness-direction conductivity and excellent resistance to gas permeation.

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Research Organization:: Nanotek Instruments, Inc., Dayton, OH (United States)

Sponsoring Organization:: USDOE

Assignee:: Nanotek Instruments, Inc. (Dayton, OH)

Patent Number(s):: 8,728,679

Application Number:: 11/807,379

OSTI ID:: 1132265

Resource Relation:: Patent File Date: 2007 May 29

Country of Publication:: United States

Language:: English

References (24)

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