| Relationship between lattice mismatch and ionic conduction of grain boundary in YSZ |
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| 作者姓名： | Fei Ye Chun Yu Yin Ding Rong Ou Toshiyuki Mori |
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| 基金项目： | support from Global Research Center for Environment;Energy based on Nanomaterials Science (GREEN);the National Natural Science Foundation of China (No. 51101146);supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education;the Fundamental Research Funds for the Central Universities (No. DUT13LAB20) |
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| 摘 要： | The grain boundary plays an important role in the electrical behaviors of solid oxide electrolytes for solid state fuel cells. To reveal the relationship between the structure and the ionic conductivity of grain boundary,the conductive properties of {1 1 1} and {1 1 0} twist grain boundaries in 8 mol% yttria-stabilized zirconia have been examined. These boundaries have a series of Σ values defined by the coincident site lattice model. It has been found that the activation energy of {1 1 1} twist grain boundary increases and then decreases with the Σ value,while that of the {1 1 0} boundary shows an opposite trend. It is suggested that the properties can reflect the balance of the effects of lattice mismatch on the diffusion ability of oxygen vacancies and the segregation of oxygen vacancies and Y3 tions. Therefore,the properties in polycrystalline electrolyte can be adjusted by controlling the grain boundary structures.
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| 关 键 词： | Yttria-stabilized zirconia Grain boundary Ionic conduction Mismatch |
| 收稿时间： | 26 September 2013 |
Relationship between lattice mismatch and ionic conduction
of grain boundary in YSZ |
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| Fei Ye,Chun Yu Yin,Ding Rong Ou,Toshiyuki Mori.Relationship between lattice mismatch and ionic conduction of grain boundary in YSZ[J].Progress in Natural Science,2014,24(1):83-86. |
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| Authors: | Fei Ye Chun Yu Yin Ding Rong Ou and Toshiyuki Mori |
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| Institution: | School of Materials Science and Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, China
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, 2 Linggong Road,
Dalian, Liaoning 116024, China;Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, 2 Linggong Road,
Dalian, Liaoning 116024, China;Laboratory of Fuel Cells, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China;Fuel Cell Materials Group, Battery Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan |
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| Abstract: | The grain boundary plays an important role in the electrical behaviors of solid oxide electrolytes for solid state fuel cells. To reveal the relationship between the structure and the ionic conductivity of grain boundary, the conductive properties of {1 1 1} and {1 1 0} twist grain boundaries in 8 mol% yttria-stabilized zirconia have been examined. These boundaries have a series of Σ values defined by the coincident site lattice model. It has been found that the activation energy of {1 1 1} twist grain boundary increases and then decreases with the Σ value, while that of the {1 1 0} boundary shows an opposite trend. It is suggested that the properties can reflect the balance of the effects of lattice mismatch on the diffusion ability of oxygen vacancies and the segregation of oxygen vacancies and Y3+ ions. Therefore, the properties in polycrystalline electrolyte can be adjusted by controlling the grain boundary structures. |
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| Keywords: | Yttria-stabilized zirconia Grain boundary Ionic conduction Mismatch |
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