Oxide-ion conductors for fuel cells

• Autorzy: Krok F. , Abrahams I. , Wrobel W. , Kozanecka-Szmigiel A. , Dygas J.R.
• Konferencja: IX National Conference on Fast Ion Conductors , Wrocław-Borowice , 9-12 December 2004
• Języki publikacji: EN

Abstrakty

EN

The principal materials used in the construction of solid oxide fuel cells (SOFCs) are discussed. Some of the problems encountered with high temperature fuel cells (HT-SOFCs) might be overcome by lowering the operating temperature to 500-700 °C, through the development of suitable materials for intermediate temperature fuel cells IT-SOFCs. Candidate electrolyte materials are discussed, including cerium gallium oxide, lanthanum strontium gallium magnesium oxide, and electrolytes based on doped bismuth oxide. While high ionic conductivities can readily be achieved in these materials at intermediate temperatures, stability in reducing atmosphere is still a problem. This might be overcome by careful chemical design of electrolytes containing stabilising dopants. Two zirconia-doped bismuthate systems are discussed in this respect. In both cases, the obtained materials exhibit different structures - one is Bi3Nb1-xZrxO7-x/2 of the ?-Bi2O3 type, and the other, Bi4V2-2xZrxO11-x, has a layered structure of the Aurivillius type.

Słowa kluczowe

EN

fuel cells; solid electrolyte; bismuth oxide

PL

ogniwa paliwowe; tlenek bizmutu; elektrolit stały

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 1
• Strony: 13--22
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Krok F.

autor

Abrahams I.

autor

Wrobel W.

autor

Kozanecka-Szmigiel A.

autor

Dygas J.R.

• Faculty of Physics, Warsaw University of Technology, ul. Koszykowa 75, 00-662, Warsaw,

Bibliografia

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