| Gd_(1-x)Sr_xCoO_(3-δ)和Gd_(0.8)Sr_(0.2)Co_(1-y)Fe_yO_(3-δ)系阴极材料的制备和性能 | |
| 王亚楠 ; 周和平 ; WANG Ya-Nan ; ZHOU He-Ping | |
| 2010-05-12 ; 2010-05-12 | |
| 关键词 | 甘氨酸-硝酸盐法 固体氧化物燃料电池 阴极材料 电导率 界面阻抗 glycine nitrate process solid oxide fuel cell cathode conductivity thermal expansion TM911.4 |
| 其他题名 | Preparation and Characterization of Gd_(1-x)Sr_xCoO_(3-δ) and Gd_(0.8)Sr_(0.2)Co_(1-y)Fe_yO_(3-δ) |
| 中文摘要 | 采用甘氨酸-硝酸盐(GNP)法合成了新型中温固体氧化物燃料电池(IT-SOFC)的阴极材料Gd1-xSrxCoO3-δ(x=0～0.5)和Gd0.8Sr0.2Co1-yFeyO3-δ(y=0～1),所合成的初始粉体在800℃下煅烧12h后均形成了钙钛矿结构的单相固溶体。研究发现,Gd0.8Sr0.2CoO3-δ(GSC)的电导率在600℃时达到了559S·cm-1,由Ce0.8Gd0.2O2-δ(GDC)电解质和GSC-25GDC材料组成的对称电极在600℃和700℃的界面阻抗分别为0.170Ω·cm2和0.064Ω·cm2,活化能仅为87.8kJ·mol-1,预示其可以作为ITSOFC较为理想的阴极备选材料;随着Fe3+离子含量的增加,Gd0.8Sr0.2Co1-yFeyO3-δ系列阴极材料的热膨胀系数显著降低,但其电导率也急速下降;此外,通过调整Gd0.8Sr0.2CoO3-δ与GDC的比例可以制备出热膨胀系数与GDC电解质匹配、性能良好的Gd0.8Sr0.2CoO3-δ/GDC复合阴极材料。; IT-SOFC cathode material of Gd1-xSrxCoO3-δ(x=0～0.5) and Gd0.8Sr0.2Co1-yFeyO3-δ(y=0～1) were synthesized by glycine-nitrate process(GNP) and the stable perovskite phase was formed completely after calcination at 800 ℃ for 12 hours.The results showed that the conductivity of Gd0.8Sr0.2CoO3-δ was 559 S·cm-1 at 600 ℃;the interfacial impedance at 600 ℃ and 700 ℃ of the symmetrical electrode composed of Ce0.8Gd0.2O2-δ(GDC) electrolyte and GSC-25GDC composite was 0.170 Ω·cm2 and 0.064 Ω·cm2,and the activation energy was only 87.8 kJ·mol-1,indicating that Gd0.8Sr0.2CoO3-δ could be an ideal IT-SOFC cathode material.With the addition of Fe3+,the thermal expansion and the conductivity of Gd0.8Sr0.2Co1-yFeyO3-δ reduce fast.In addition,Gd0.8Sr0.2CoO3-δ /GDC composite cathode with good performance and matched thermal expansion coefficient to GDC electrolyte can be prepared by adjusting the proportion of Gd0.8Sr0.2CoO3-δ and GDC. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/28919]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 王亚楠,周和平,WANG Ya-Nan,等. Gd_(1-x)Sr_xCoO_(3-δ)和Gd_(0.8)Sr_(0.2)Co_(1-y)Fe_yO_(3-δ)系阴极材料的制备和性能[J],2010, 2010. |
| APA | 王亚楠,周和平,WANG Ya-Nan,&ZHOU He-Ping.(2010).Gd_(1-x)Sr_xCoO_(3-δ)和Gd_(0.8)Sr_(0.2)Co_(1-y)Fe_yO_(3-δ)系阴极材料的制备和性能.. |
| MLA | 王亚楠,et al."Gd_(1-x)Sr_xCoO_(3-δ)和Gd_(0.8)Sr_(0.2)Co_(1-y)Fe_yO_(3-δ)系阴极材料的制备和性能".(2010). |
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