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Title: Solid oxide fuel cells, and air electrode and electrical interconnection materials therefor

In one aspect of the invention, an air electrode material for a solid oxide fuel cell comprises Y.sub.1-a Q.sub.a MnO.sub.3, where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8. Preferably, "a" is from 0.4 to 0.7. In another aspect of the invention, an electrical interconnection material for a solid oxide fuel cell comprises Y.sub.1-b Ca.sub.b Cr.sub.1-c Al.sub.c O.sub.3, where "b" is from 0.1 to 0.6 and "c" is from 0 to 9.3. Preferably, "b" is from 0.3 to 0.5 and "c" is from 0.05 to 0.1. A composite solid oxide electrochemical fuel cell incorporating these materials comprises: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y, the air electrode comprising Y.sub.1-a Q.sub.a MnO.sub.3, where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8, the electrical interconnection comprising Y.sub.1-b Ca.sub.b Cr.sub.1-c Al.sub.c O.sub.3, where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttrium stabilized solid electrolyte comprising (1-d)ZrO.sub.2 -(d)Y.sub.2 O.sub.3 where "d" is from 0.06 to 0.5; and a solid fuelmore » electrode comprising X-ZrO.sub.2, where "X" is an elemental metal.« less
Authors:
 [1]
  1. (Richland, WA)
Publication Date:
OSTI Identifier:
868452
Report Number(s):
US 5143801
DOE Contract Number:
AC06-76RL01830
Resource Type:
Patent
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA
Country of Publication:
United States
Language:
English
Subject:
solid; oxide; fuel; cells; air; electrode; electrical; interconnection; materials; aspect; air; electrode; material; solid; oxide; fuel; cell; comprises; 1-a; mno; selected; consisting; sr; mixtures; preferably; aspect; electrical; interconnection; material; solid; oxide; fuel; cell; comprises; 1-b; 1-c; preferably; 05; composite; solid; oxide; electrochemical; fuel; cell; incorporating; materials; comprises; solid; oxide; air; electrode; adjacent; solid; oxide; electrical; interconnection; commonly; cation; air; electrode; comprising; 1-a; mno; selected; consisting; sr; mixtures; electrical; interconnection; comprising; 1-b; 1-c; yttrium; stabilized; solid; electrolyte; comprising; 1-d; zro; 06; solid; fuel; electrode; comprising; x-zro; elemental; metal; electrochemical fuel; cell incorporating; fuel cell; fuel cell; fuel cell; fuel cell; electrolyte comprising; electrical interconnection; electrical interconnection; electrical interconnection; electrical interconnection; solid fuel; oxide electrochemical; cell comprises; cell comprises; air electrode; air electrode; air electrode; air electrode; fuel cells; solid electrolyte; oxide fuel; oxide fuel; oxide fuel; solid oxide; solid oxide; solid oxide; solid oxide; solid oxide; solid oxide; electrode material; fuel electrode; interconnection material; interconnection material; electrode comprising; electrode comprising; elemental metal; materials comprises; composite solid; materials comprise; oxide electric; chemical fuel; interconnection materials; electrical interconnect; electrical interconnect; electrical interconnect; electrical interconnect /429/