高酸化物イオン伝導性セリア系固体電解質

Japanese Patent JP3598344

B2

PROBLEM TO BE SOLVED: To introduce an oxygen deficiency and to simultaneously improve oxide ion conductivity and reduction resistance by specifying the composition of a fluorite type ceria compound consisting of La, Sr, Ba, Ce and O and providing a specified effective index. SOLUTION: This high oxide ion conductive ceria-base solid electrolyte comprises a fluorite type ceria compound of the formula (La1-xMx)yCe1-yO2-z (wherein M is Sr or Ba, 1<=x<=0.5, 0.10.925 to <1.20 represented by the equation (effective index)=(Rd/Rce)*(Rc/Ro), wherein the symbol * shows integration, Rd=RM*x+RLa*(1-x), Rc=Rd*y+Rce*(1-y), Ro=1.4*(1-z), Rce=0.97, RLa is 1.18 which is the ionic radius of La, RM is the average ionic radius of Sr and Ba and 1.187<=Rd<=1.30 Å.

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Toshiyuki Mori
Takayasu Ikegami

JP29462098A

December 08, 2004

September 30, 1998

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National Institute for Materials Science

C01F17/00; C04B35/50; H01B1/06; H01M8/02; (IPC1-7): H01B1/06; C01F17/00; C04B35/50; H01M8/02

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