Invention Grant
- Patent Title: Fuel cell separator plate surface treatment by laser ablation
- Patent Title (中): 燃料电池隔板通过激光烧蚀表面处理
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Application No.: US11760183Application Date: 2007-06-08
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Publication No.: US08835079B2Publication Date: 2014-09-16
- Inventor: David A Smiljanich , Reena L. Datta
- Applicant: David A Smiljanich , Reena L. Datta
- 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: Quinn Law Group, PLLC
- Main IPC: H01M8/00
- IPC: H01M8/00 ; H01M8/02

Abstract:
A composite separator plate for use in an electrochemical fuel cell as well as a method of forming same is disclosed. The plate may be formed of polymeric material and electrically conductive material having a non-conductive polymeric outer layer by compression molding, or alternately of a metallic material having an outer metal oxide layer. Contact regions of the plate surface are subsequently ablated with a laser to remove the outer layer of material from the plate. The removal of the outer layer reduces the contact resistance of the plate when used in an electrochemical fuel cell stack, while offering adequate strength and corrosion resistance for the fuel cell stack environment.
Public/Granted literature
- US20080305385A1 FUEL CELL SEPARATOR PLATE SURFACE TREATMENT BY LASER ABLATION Public/Granted day:2008-12-11
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