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Citation: QIU Li-Gan, MA Gui-Lin, LU Xin-Hua. The Ionic Conductivity and the Fuel Cell Performance of Ba_0.98Ce_0.8Eu_0.2O_3-α Solid Electrolyte[J]. Chinese Journal of Applied Chemistry, ;2003, 20(10): 936-941. shu

The Ionic Conductivity and the Fuel Cell Performance of Ba_0.98Ce_0.8Eu_0.2O_3-α Solid Electrolyte

QIU Li-Gan ^a,c ,
MA Gui-Lin ^b,, ,
LU Xin-Hua ^b

1.
a Department of Chemistry, Yancheng Teachers College, Yancheng;
2.
b Faculty of Chemistry and Chemical Engineering, Suzhou Univeristy, Suzhou 215006;
3.
c Faculty of Material Engineering, Suzhou University, Suzhou

Corresponding author: MA Gui-Lin,
Received Date: 22 January 2003
Available Online: 29 April 2003
Fund Project: 国家自然科学基金资助项目(20171034) (20171034)江苏省教育厅自然科学指导性课题(01KJD150003) (01KJD150003)

Ba_0.98Ce_0.8Eu_0.2O_3-α solid electrolyte with nonstoichiometric composition has been synthesized by high temperature solid-state reaction. The crystal structure was determined by X-ray diffractometry. Its proton and oxide-ion conduction were investigated in the temperature range of 600~1 000℃ by means of gas concentration cells and electrochemical hydrogen permeation(hydrogen pumping), respectively. Its fuel cell performances were investigated and compared with those of BaCe_0.8Eu_0.2O_3-α solid electrolyte with stoichiometric composition. The experimental results indicate that the sample was a single-phase structure of perovskite-type orthorhombic system. They both have good proton conductivity, and Ba_0.98Ce_0.8Eu_0.2O_3-α has higher proton transport numbers in the temperature range of 600~1 000℃ under hydrogen atmosphere. Both of the samples are a mixed conductor of oxide-ion and electron hole with an almost the same oxide-ion transport number under oxygen atmosphere; Ba_0.98Ce_0.8Eu_0.2O_3-α has higher mixed ionic transport numbers under fuel cell condition.
- Ba_0.98Ce_0.8Eu_0.2O_3-α,
- BaCe_0.8Eu_0.2O_3-α,
- nonstoichiometry,
- gas concentration cell,
- fuel cell
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The Ionic Conductivity and the Fuel Cell Performance of Ba_0.98Ce_0.8Eu_0.2O_3-α Solid Electrolyte