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阳极负载型H_2S中温固体氧化物燃料电池电输出性能
作者:谭文轶 钟秦  
单位:南京理工大学化工学院环境工程系 南京理工大学化工学院环境工程系 南京210094 南京210094 
关键词:中温  阳极负载  固体氧化物燃料电池  硫化氢  电化学性能 
分类号:TM911.4
出版年,卷(期):页码:2006,34(8):970-974
DOI:
摘要:
以NiO-(CeO2)1-2x(Sm2O3)x固体氧化物燃料电池(solidoxidefuelcell,SOFC)的阳极负载,采用甘氨酸-硝酸盐燃烧法制备(CeO2)0.8(Sm2O3)0.1固体电解质前驱体粉末并流延成膜。在中温(650~850℃),分别测定了H2S-AirSOFC的电输出性能随H2S流速r(H2S)、运行温度的变化情况。实验结果表明:SOFC的开路电压随r(H2S)的增大而呈指数关系增大。电流密度-电压(电功率密度)曲线显示:SOFC电输出性能随r(H2S)的增大而改善;但当r(H2S)=80mL/min时,在高电流密度区间输出电压出现明显的下降,这是由于流速增大产生的浓差极化和阳极Ni受H2S腐蚀导致的结果。温度对极化曲线影响表明,SOFC电输出性能随温度的升高而改善,但基于(CeO2)0.8(Sm2O3)0.1离子-电子混合导电等原因,单体电池开路电压受温度影响比较复杂。
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A glycine-nitrate combustion process was adopted to prepare samaria doped ceria [(CeO2)1-2x(Sm2O3)x,SDC] electrolyte on NiO-SDC anode substrate.The electrochemical performance of H2S-Air solid oxide fuel cells (SOFCs) was characterized at different intermediate temperatures and H2S flow rates,r(H2S).The results demonstrate that the open circuit voltage (OCV) of SOFCs in-creases exponentially with the H2S flow rate,and the electrochemical performance is improved at higher flow rates except r(H2S)=80 mL/min.The descent of voltage at r(H2S)=80 mL/min appears in the higher current density range,which can be attributed to the con-centrated polarization and the fact that Ni particles in anodes are corrupted by H2S.The influence of temperature on OCV seems complicated,although the polarization curve of H2S-Air SOFC based on ceria electrolyte is improved at elevated temperatures.
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基金项目:
国家自然科学基金(50478069)资助;; 江苏省精细化工重点实验室资助(KF0401)
作者简介:
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参考文献:
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