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Ionic Conduction and Fuel Cell Performance of Ba0.98Ce0.8Tm0.2O3-α Ceramic
仇立干*,王茂元
Author NameAffiliationE-mail
仇立干* School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng 224051, China wmyqlg_64@hotmail.com 
王茂元 School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng 224051, China  
Abstract:
The perovskite-type oxide solid solution Ba0.98Ce0.8Tm0.2O3-α was prepared by high tem-perature solid-state reaction and its single phase character was confirmed by X-ray diffrac-tion. The conduction property of the sample was investigated by alternating current impedance spectroscopy and gas concentration cell methods under different gases atmo-spheres in the temperature range of 500-900 oC. The performance of the hydrogen-air fuel cell using the sample as solid electrolyte was measured. In wet hydrogen, the sample is a pure protonic conductor with the protonic transport number of 1 in the range of 500-600 oC, a mixed conductor of proton and electron with the protonic transport number of 0.945-0.933 above 600 oC. In wet air, the sample is a mixed conductor of proton, oxide ion, and elec-tronic hole. The protonic transport numbers are 0.010-0.021, and the oxide ionic transport numbers are 0.471-0.382. In hydrogen-air fuel cell, the sample is a mixed conductor of proton, oxide ion and electron, the ionic transport numbers are 0.942-0.885. The fuel cell using Ba0.98Ce0.8Tm0.2O3-α as solid electrolyte can work stably. At 900 oC, the maximum power output density is 110.2 mW/cm2, which is higher than that of our previous cell using Ba0.98Ce0.8Tm0.2O3-α (x≤1, RE=Y, Eu, Ho) as solid electrolyte.
Key words:  Ba0.98Ce0.8Tm0.2O3-α, Ionic conduction, Gas concentration cell, Alternating current impedance, Fuel cell
FundProject:
Ba0.98Ce0.8Tm0.2O3-α的离子导电性及其燃料电池性能
Li-gan Qiu*,Mao-yuan Wang
摘要:
用高温固相反应法制备了Ba0.98Ce0.8Tm0.2O3-α钙钛矿型氧化物固溶体,粉末X射线衍射表明该固溶体为单相. 用交流阻抗谱技术和气体浓差电池方法研究了样品在500~900 oC、不同气体气氛中的导电性,以及该样品为固体电解质的氢-空气燃料电池性能. 该电池能稳定地工作,在900 oC时,电池的最大功率密度为110.2 mW/cm2,高于以BaxCe0.8RE0.2O3- (x≤1, RE=Y, Eu, Ho)为固体电解质的氢-空气燃料电池的功率密度
关键词:  Ba0.98Ce0.8Tm0.2O3-α,离子导电性,气体浓差电池,交流阻抗谱,燃料电池
DOI:10.1088/1674-0068/23/06/707-712
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