Invention Grant
US08728679B2 Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications
有权
用于燃料电池流场板或双极板应用的层压剥离石墨复合金属组合物
- Patent Title: Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications
- Patent Title (中): 用于燃料电池流场板或双极板应用的层压剥离石墨复合金属组合物
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Application No.: US11807379Application Date: 2007-05-29
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Publication No.: US08728679B2Publication Date: 2014-05-20
- Inventor: Aruna Zhamu , Jinjun Shi , Jiusheng Guo , Bor Z. Jang
- Applicant: Aruna Zhamu , Jinjun Shi , Jiusheng Guo , Bor Z. Jang
- Applicant Address: US OH Dayton
- Assignee: Nanotek Instruments, Inc.
- Current Assignee: Nanotek Instruments, Inc.
- Current Assignee Address: US OH Dayton
- Agency: Thompson Hine LLP
- Agent Mark Levy
- Main IPC: H01M8/24
- IPC: H01M8/24 ; B32B7/02

Abstract:
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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