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| 新型固体电解质Ce5.2RE0.8MoO15-δ 的合成及电性质 | |
| 引用本文： | 周德凤,郭微,葛志敏,郝险峰,柴平,曹学强,邢献然,孟健.新型固体电解质Ce5.2RE0.8MoO15-δ 的合成及电性质[J].高等学校化学学报,2007,28(2):220-223. |
| 作者姓名： | 周德凤 郭微 葛志敏 郝险峰 柴平 曹学强 邢献然 孟健 |
| 作者单位： | 1. 中国科学院长春应用化学研究所稀土化学与物理重点实验室,长春,130022;长春工业大学生物工程学院,长春,130012 2. 长春工业大学生物工程学院,长春,130012 3. 中国科学院长春应用化学研究所稀土化学与物理重点实验室,长春,130022 4. 北京科技大学物理化学系,北京,100083 |
| 摘 要： | 采用溶胶-凝胶方法合成了系列新型氧化物Ce5.2RE0.8MoO15-δ(RE=Ce, Y, La, Sm, Gd, Dy, Ho, Er). 通过XRD, Raman和XPS等手段对氧化物的结构进行了表征, 采用交流阻抗谱测试其导电性能. 研究结果表明, RE3+的掺杂可增加氧离子的空位浓度, 改善母体电导率, 晶胞参数随RE3+半径的增大而增大. 掺杂离子Dy3+的半径(0.0908 nm) 与母体基质离子Ce4+的半径(0.0920 nm) 相近, 形成的掺杂氧化物晶格弹性应变最小, RE3+与氧空位间的缔合焓(ΔHA)最小, 因而氧化物Ce5.2Dy0.8MoO15-δ具有相对较高的电导率(7.02×10-3 S/cm)和较低的激活能(1.056 eV). |
| 关 键 词： | 固体电解质 电导率 溶胶-凝胶法 固体氧化物燃料电池 |
| 文章编号： | 0251-0790（2007）02-0220-04 |
| 收稿时间： | 2006-03-23 |
| 修稿时间： | 2006-03-23 |
Synthesis and Electrical Properties of New Solid State Electrolyte Materials Ce5.2RE0.8MoO15-δ |
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| ZHOU De-Feng,GUO Wei,GE Zhi-Min,HAO Xian-Feng,CAI Ping,CAO Xue-Qiang,XING Xian-Yan,MENG Jian.Synthesis and Electrical Properties of New Solid State Electrolyte Materials Ce5.2RE0.8MoO15-δ[J].Chemical Research In Chinese Universities,2007,28(2):220-223. | |
| Authors: | ZHOU De-Feng GUO Wei GE Zhi-Min HAO Xian-Feng CAI Ping CAO Xue-Qiang XING Xian-Yan MENG Jian |
| Institution: | Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;;School of Biological Engineering, Changchun University of Technology, Changchun 130012, China;;Department of Physical Chemistry, Beijing University of Scitnce &; Technology, Beijing 100083, China |
| Abstract: | A series of solid state electrolytes, Ce5.2RE0.8MoO15-δ(RE=Y, La, Sm, Gd, Dy, Ho, Er), were synthesized by sol-gel method. Their structures and electrical conductivities were characterized by X-ray Diffraction(XRD), Raman and X-ray Photoelectron Spectroscopy(XPS) and AC impedance spectroscopy, respectively. The results show that the concentrations of oxygen vacancy increased with increasing x and their conductivity were improved. And the cell parameters increase as the radius of RE3+ increases. Because the ionic radius of doped Dy3+(0.0908 nm) is closed to that of Ce4+(0.0920 nm), their oxide has minimal cell elastic straining between RE3+and oxygen vacancy, and the system has the least association enthalpy, thus the oxide Ce5.2RE0.8MoO15-δ exhibits a higher conductivity(7.02×10-3 S/cm) and lower activation energy(1.056 eV) compared to the other doped compounds. |
| Keywords: | Solid state electrolyte Conductivity Sol-gel method SOFCs |
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