Invention Grant
- Patent Title: Method to make conductive hydrophilic fuel cell elements
- Patent Title (中): 制造导电亲水性燃料电池元件的方法
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Application No.: US11068489Application Date: 2005-02-28
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Publication No.: US08029943B2Publication Date: 2011-10-04
- Inventor: Gayatri Vyas , Thomas A. Trabold , Stephen William Gaarenstroom
- Applicant: Gayatri Vyas , Thomas A. Trabold , Stephen William Gaarenstroom
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Miller IP Group, PLC
- Agent John A. Miller
- Main IPC: H01M8/04
- IPC: H01M8/04 ; H01M4/66

Abstract:
A flow field plate for a fuel cell that has one or more outer layers that makes the plate more conductive and hydrophilic. In one embodiment, the coating is co-deposited as combination of a conductive material and a metal oxide coating. A suitable conductive material is gold and suitable metal oxides include SiO2, HfO2, ZrO2, Al2O3, SnO2, Ta2O5, Nb2O5, MoO2, IrO2, RuO2 and mixtures thereof. The conductive material and metal oxide can also be deposited as two separate layers, where the metal oxide is the outer layer. According to another embodiment, a metal layer is deposited on the plate with nanopores that provide the hydrophilicity. Also, doping ions can be added to the metal oxide to provide low fluoride solubility of the coating to control the rate that hydrofluoric acid etches away the oxide layer.
Public/Granted literature
- US20060194095A1 Method to make conductive hydrophilic fuel cell elements Public/Granted day:2006-08-31
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