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Title:
TITANIUM OR TITANIUM ALLOY FOR FUEL CELL SEPARATOR HAVING IMPROVED CONTACT CONDUCTIVITY WITH CARBON AND DURABILITY, FUEL CELL SEPARATOR USING SAME, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/021298
Kind Code:
A1
Abstract:
Provided is a titanium or titanium alloy for a solid polymer-type fuel cell separator having excellent contact resistance with carbon and durability. A titanium or titanium alloy oxide having a film formed by stabilization after passivation treatment on a titanium or titanium alloy substrate and, dispersed through this oxide film, particles having a major axis of 1 to 100 nm formed from one, two, or more conductors selected from carbides, nitrides, carbonitrides, and borides of tantalum, titanium, vanadium, zirconium and chromium is characterized in that the contact resistivity with carbon paper is 20 mΩ·cm2 or less at a surface pressure of 10 kgf/cm2 both before and after forced degradation tests involving immersion for four days in an aqueous sulfuric acid solution at 80ºC brought to a pH of 4.

Inventors:
KIHIRA HIROSHI (JP)
YOSIDA YUUICHI (JP)
KAGAWA TAKU (JP)
NISHIMOTO TAKUMI (JP)
TANAKA KOKI (JP)
KIMURA MASAO (JP)
TOKUNO KIYONORI (JP)
TAKAHASHI KAZUHIRO (JP)
DOMOTO TAKASHI (JP)
Application Number:
PCT/JP2013/070550
Publication Date:
February 06, 2014
Filing Date:
July 30, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
H01M8/02; C23C22/24; C23C26/00; C23C28/04; C25D11/26; H01M8/10
Domestic Patent References:
WO2010038544A12010-04-08
WO2011016465A12011-02-10
WO2007145377A12007-12-21
Foreign References:
JPH11162479A1999-06-18
JP2010129458A2010-06-10
JP2009170116A2009-07-30
JP2000328200A2000-11-28
JP2004273370A2004-09-30
JP2007131947A2007-05-31
JP2007005084A2007-01-11
JP2006140095A2006-06-01
JP2007234244A2007-09-13
JP2010097840A2010-04-30
JP2010129458A2010-06-10
JP2010248572A2010-11-04
JP2012028045A2012-02-09
JP2012028046A2012-02-09
JP2012043775A2012-03-01
JP2012028047A2012-02-09
JP2011077018A2011-04-14
Other References:
See also references of EP 2882019A4
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
Yoshiaki Kameya (JP)
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