- Patent Title: Titanium material or titanium alloy material for fuel cell separator having high contact conductivity with carbon and high durability, fuel cell separator including the same, and fuel cell
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Application No.: US14646678Application Date: 2014-01-31
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Publication No.: US09947942B2Publication Date: 2018-04-17
- Inventor: Kazuhiro Takahashi , Taku Kagawa , Hiroshi Kihira , Kiyonori Tokuno , Takumi Nishimoto , Koki Tanaka
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-018976 20130201
- International Application: PCT/JP2014/052274 WO 20140131
- International Announcement: WO2014/119734 WO 20140807
- Main IPC: H01M2/08
- IPC: H01M2/08 ; H01M8/0208 ; C23C8/10 ; C22C14/00 ; H01M8/0206 ; H01M8/0247 ; H01M8/1018
Abstract:
A titanium or titanium alloy material for a fuel cell separator has a surface shape in which a plurality of projections are distributed, and a titanium oxide film on a surface of the projections. Fine projections are assumed to increase the contact conductivity remarkably. By increasing contact conductivity with carbon and durability of a titanium or titanium alloy material for a fuel cell separator, the lifetime of a fuel cell may be increased. The material has high usability in the cell manufacturing industry.
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