CATHODE MATERIAL FOR A HIGH-TEMPERATURE FUEL CELL (SOFC) AND A CATHODE THAT CAN BE PRODUCED THEREFROM

Title:

CATHODE MATERIAL FOR A HIGH-TEMPERATURE FUEL CELL (SOFC) AND A CATHODE THAT CAN BE PRODUCED THEREFROM

Document Type and Number:

WIPO Patent Application WO2005045979

Kind Code:

A3

Abstract:

The invention relates to a cathode material, particularly for use in a high-temperature fuel cell, comprising substoichiometric Ln_1-x-yM_yFe_1-zC_zO_3-d, with 0.02 = x = 0.05, 0.1 = y = 0.6, 0.1 = z = 0.3, 0 = d = 0.25 and with Ln = lanthanides, M = strontium or calcium and C = cobalt or copper. By using a particular production method, in which this cathode material having a specified grain size is used, and in which a (Ce, Gd)O_2-d-intermediate layer is advantageously formed between the cathode and electrolyte, a cathode is obtained that, when used in a high-temperature fuel cell, can achieve a power greater than 1 W/cm² already at 750 °C and a cell voltage of 0.7 V.

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Inventors:

BUCHKREMER HANS PETER (DE)
TIETZ FRANK (DE)
MAI ANDREAS (DE)
STOEVER DETLEV (DE)

Application Number:

PCT/DE2004/002443

Publication Date:

June 22, 2006

Filing Date:

November 04, 2004

Export Citation:

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Assignee:

FORSCHUNGSZENTRUM JUELICH GMBH (DE)
BUCHKREMER HANS PETER (DE)
TIETZ FRANK (DE)
MAI ANDREAS (DE)
STOEVER DETLEV (DE)

International Classes:

H01M8/12; H01M4/88; H01M4/86

Domestic Patent References:

WO2004100284A2

2004-11-18

Foreign References:

US20020048699A1	2002-04-25
US20020177031A1	2002-11-28

Other References:

J.W. STEVENSON, T.R. ARMSTRONG, R.D. CARNEIM, L.R. PEDERSON, AND W.J. WEBER: "Electrochemical Properties of Mixed Conducting Perovskites La(1-x)M(x) Co(1-y)Fe(y) O(3-delta) (M= Sr, Ba, Ca)", J. ELECTROCHEM. SOC., vol. 143, no. 9, September 1996 (1996-09-01), pages 2722 - 2729, XP002377201

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