Title:
FUEL CELL
Document Type and Number:
WIPO Patent Application WO/2017/006943
Kind Code:
A1
Abstract:
A fuel cell (10) is provided with a fuel electrode (20), an air electrode (50), and a solid electrolyte layer (30) disposed between the fuel electrode (20) and the air electrode (50). The air electrode (50) contains as a main component a Perovskite-type oxide including La and Sr at the A site, the Perovskite-type oxide being expressed by general formula ABO3. The air electrode (50) has a first surface (50S) on the opposite side from the solid electrolyte layer (30). A first ratio (R1) of the Sr concentration to the La concentration detected using X-ray photoelectron spectroscopic analysis on the first surface (50S) is no more than four times a second ratio (R2) of the Sr concentration to the La concentration detected using X-ray photoelectron spectroscopic analysis on an exposed surface (51S) that was exposed by performing a surface treatment on the first surface (50S). The exposed surface (51S) is in a position within 5 nm of the first surface (50S) in the thickness direction.
Inventors:
FUJISAKI SHINJI (JP)
YAMAMURA YOSHIHIKO (JP)
RYU TAKASHI (JP)
OHMORI MAKOTO (JP)
YAMAMURA YOSHIHIKO (JP)
RYU TAKASHI (JP)
OHMORI MAKOTO (JP)
Application Number:
PCT/JP2016/069942
Publication Date:
January 12, 2017
Filing Date:
July 05, 2016
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
H01M4/86; H01M4/90; H01M8/12
Foreign References:
| JP2013191569A | 2013-09-26 | |||
| JP2014135271A | 2014-07-24 |
Other References:
DONGJO OH ET AL.: "Mechanism of La0.6Sr0.4Co0.2Fe0.8O3 cathode degradation", J.MATERIALS RESEARCH SOCIETY, vol. 27, no. 15, 14 August 2012 (2012-08-14), pages 1992 - 1999, XP055345877
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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