ELECTRODE OF SOLID ELECTROLYTE FUEL CELL AND MANUFACTURE THEREOF

• Main Authors: MATSUSHIMA TOSHIO, ARAKAWA MASAYASU, OORUI HIMEKO, KATO NAOKI
• Format: Patent
• Language: English
• Published: 10.08.1999
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PROBLEM TO BE SOLVED: To provide an electrode by using a fuel electrode powder having a large quantity of three-phase interfaces and high electron conductivity, and containing an electrode active metal hard to be sintered and to provide a method for manufacturing the electrode. SOLUTION: The oxide powder 2 bears a fine particle of a metal with smaller particle diameter than that of the oxide powder 2 or a fine particle 1 of the oxide of this metal on the surface. This electrode has structure produced by mixing the oxide powder bearing a fine particle of the metal or a fine particle 1 of the oxide of this metal on the surface with a metal powder or an oxide powder 3 of the metal having approximately same particle diameter as that of the oxide powder 2 and dispersing the mixture. Consequently, the metal fine particle is highly dispersed on the surface of the oxide powder 2 and the three-phase interface surface area is significantly increased and voltage decrease following the electrode reaction is suppressed and an electrode having excellent output properties can be provided. Moreover, since the metal fine particle is held in the oxide powder 2, respective metal particles are hardly sintered with one another and an electrode having excellent and durable stability and scarcely deteriorated with the lapse of time can be obtained. Further, due to the existence of the metal powder which the oxide powder 2 does not hold, high electron conductivity is provided.