CONSTRUCTION AND OPERATION OF FUEL-CELLS BASED ON THE SOLID ELECTROLYTE BACEO3-GD
CONSTRUCTION AND OPERATION OF FUEL-CELLS BASED ON THE SOLID ELECTROLYTE BACEO3-GD
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DOI：
10.1016/0167-2738(91)90023-5
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发表时间：
1991-01-01
影响因子：
3.2
通讯作者：
MAHMOOD, MN
中科院分区：
文献类型：
--
作者：
BONANOS, N;ELLIS, B;MAHMOOD, MN
基于新型钙钛矿型固体电解质BaCeO_3：Gd(10mol%)，构建并运行了氢氧燃料电池，在600℃和800℃下分别可获得1.2~1.0V的开路电压。负载下，电流密度与电解液厚度成反比，在端电压为700 mV时，电流密度最大值分别为25 mA cm-2和105 mA cm-2，温度分别为600℃和800℃。基于该材料的燃料电池的电流-电压性能明显好于基于CeO_2-Gd_2O_3(20mol%)的可比电池。燃料电池在负载下工作1000h，性能没有下降，证明了BaCeO_3：Gd的稳定性。对废气中水分含量的测量表明，离子传输机制从600℃或更低的纯质子到900℃以上的以氧化物离子为主。该化合物被认为是运行在600至800℃温度范围内的燃料电池的良好候选固体电解质。
Based on a novel perovskite solid electrolyte, BaCeO3:Gd (10 mol%), hydrogen-oxygen fuel cells have been constructed and operated, giving open circuit voltages of 1.2 to 1.0 V at 600 and 800-degrees-C respectively. Under load, current densities varied inversely with electrolyte thickness, the highest values at a terminal voltage of 700 mV being 25 and 105 mA cm-2 at 600 and 800-degrees-C respectively. Fuel cells based on this material gave current-voltage performances significantly better than those of a comparable cell based on ceria-gadolinia (20 mol%). The stability of BaCeO3:Gd was demonstrated by operation of a fuel cell under load for 1000 h with no degradation of performance. Measurement of the water content of exhaust gases indicated that the ionic transport mechanism varied from purely protonic, at 600-degrees-C or below, to predominantly oxide ion above 900-degrees-C. The compound is judged to be a good candidate solid electrolyte for fuel cells operating in the temperature range 600 to 800-degrees-C.