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中温固体氧化物燃料电池阴极Pr_(0.6-z)Sr_(0.4)Co_(0.8)Fe_(0.2)0_(3-δ)性能研究

Characterization of Pr_(0.6-z)Sr_(0.4)Co_(0.8)Fe_(0.2)0_(3-δ)-SDC cathode materials for intermediate temperature solid oxide fuel cells
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摘要 采用溶胶-凝胶法合成固体氧化物燃料电池阴极系粉体Pr0.6-zSr0.4Co0.8Fe0.203-δ(PSCF)(z=0,0.02,0.05).使用X射线衍射(XRD)对其相结构与形貌进行了分析,结果表明,900℃焙烧后的阴极粉体Pr0.6-zSr0.4Co0.8Fe0.203-δ(z=0,0.02,0.05)为单一的钙钛矿结构.用交流阻抗法测定了PSCF-Ce0.8Sm0.2O1.9(SDC)体系的阻抗谱,得到1 000℃烧结的阴极体系对称电池在测试温度为750℃时z=0,z=0.02,z=0.05的极化电阻分别为0.041,0.040,0.034Ωcm-2.采用直流四电极法测试以电解质(SDC)为支撑体,以湿氢气作燃料的单电池(NiO-SDC/SDC/PSCF-SDC),测试温度为800℃时z=0,z=0.02,z=0.05的最高功率密度分别为527,561,555 mW/cm2. Cathode materials consisting ofPr0.6-Z Sr0.4 Co0.8 Fe0.2O3-δ （z = 0,0.02,0.05 ） were prepared by the solgel process for intermediate-temperature solid-oxide fuel cell.Pr0.6-Z Sr0.4Co0.8Fe0.2O3-δ （z = 0,0. 02,0. 05 ,0.1 ） had an perovskite structure after sintering at 9000C for 6h. Using impedance spectra, the area specific resistance （ASR） value of Pr0.6 Sr0.4Co0.8Fe0.2O3-δ-SDC on SDC electrolyte sintered at 1 000 ℃ was obtained. The ASR value of Pr0.6 Sr0.4Co0.8Fe0.2O3-δ-SDC tested at 750 ℃ is 0. O41 Ωcm^-2, higher than that of Pr0.58Sr0.4Co0.8Fe0.2O3-δ-SDC and Pr0.55Sr0.4C0.8 Fe0.2O3-δ-SDC, with the ASR value of O. 040 Ωcm^-2 and 0. 034Ωcm^-2 at the same temperature. By means of four-terminal configuration method, the peak density of Pr0.6-x Sr0.4 Co0.8 Fe0.2O3 - δ （ z = 0,0.02,0.05 ） single cells （NiO-SDC/SDC/PSCF-SDC） feed with humidified hydrogen delivered tested at 800 ℃, is 527 mW/cm^2 ,561mW/cm^2, and 555 mW/cm^2, respectively.
作者 张玢 安雷 赵文广 安胜利
机构地区 内蒙古科技大学材料与冶金学院
出处 《内蒙古科技大学学报》 CAS 2012年第1期21-26,共6页 Journal of Inner Mongolia University of Science and Technology
基金 国家自然科学基金资助项目(50872049) 内蒙古自然科学基金资助项目(2010zd04)
关键词 阴极材料 A位缺位 极化电阻 功率曲线 cathode material, A-site deficient, polarization resistance, curves of power density
分类号 TM911.4 [电气工程—电力电子与电力传动]
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参考文献15

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内蒙古科技大学学报
2012年 第1期

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