Air electrode bodies for solid oxide fuel cells, a process for t

Details Air electrode bodies for solid oxide fuel cells, a process for t Air electrode bodies for solid oxide fuel cells, a process for t

1993-07-09

1995-09-26

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 40, 264 44, 264104, H01M 488

Patent

active

054533309

ABSTRACT:
An air electrode body for a solid oxide fuel cell, which is composed of a perovskite-type structure having a chemical composition of (La.sub.1-x A.sub.x).sub.1-y MnO.sub.3 wherein 0<x.ltoreq.0.5, 0<y.ltoreq.0.2, and A is at least one metal selected from strontium, calcium, manganese, barium, yttrium, cerium and ytterbium. The air electrode body has a porosity of 15 to 40% and an average pore diameter of 1-5 .mu.m. A process for producing the air electrode body, includes the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, a metal A or a compound of the metal A wherein A is at least one kind of metals selected from the group of strontium, calcium, manganese, barium, yttrium, cerium and ytterbium; calcining the resulting mixture at a temperature from 1,300.degree. C. to 1600.degree. C. to synthesize (La.sub.1-x A.sub.x).sub.1-y MnO.sub.3 ; grinding the synthesized material to a powder having an average particle diameter of 3 to 15 .mu.m; adding at least an organic binder, water and 2 to 12 parts by weight of a pore-forming agent to 100 parts by weight of the resulting powder and kneading the resulting mixture; molding the kneaded material; drying the molding; and then firing the molding at a temperature not higher than the calcining temperature.

REFERENCES:
patent: 3549423 (1970-12-01), Grubb et al.
patent: 3845181 (1974-10-01), Ravault
patent: 5106706 (1992-04-01), Singh et al.
patent: 5227102 (1993-07-01), Yamada
patent: 5266419 (1993-11-01), Yamada
Extended Abstracts, vol. 93, No. 1, 16 May 1993, Princeton, New Jersey, US, pp. 1673-1674 G. Stochniol et al., "Extended Investigations of the Reaction of Lay-xSrxMnO3 with YSZ".
Comm. Eur. Communities; Solid Oxide Fuel Cells 2-5 Jul. 1991, Greece--EUR 13564, pp. 673-680, H. Kaneko et al., "Reaction of La1-xCaxMnO3 Cathode with YSZ and its Influence on the Electrode Characteristics".
Patent Abstracts of Japan, vol. 16, No. 431 (C-983) 9 Sep. 1992 & JP-A-04 149 023 (Central Res Inst Of Electric Power Ind) 22 May 1992.
"A comprehensive engineering for energies", 13-2, 1990, pp. 52-68.
"Stability of Perovskite Oxide Electrode with Stabilized Zirconia", Yamamoto et al., Dept. of Chemistry, Faculty of Engineering, Mie University, 1989, pp.87-92.

Affiliated with

Also associated with

Rating

Air electrode bodies for solid oxide fuel cells, a process for t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air electrode bodies for solid oxide fuel cells, a process for t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air electrode bodies for solid oxide fuel cells, a process for t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1551329