Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems
The K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped and K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped MgH<sub>2</sub> hydrogen storage composite systems were prepared by...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2016-11-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.11.017 |
| _version_ | 1797966309530533888 |
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| author | ZHANG Jian TANG Wang SHAO Lei YU Xiao-feng LONG Chun-guang CHEN Jian |
| author_facet | ZHANG Jian TANG Wang SHAO Lei YU Xiao-feng LONG Chun-guang CHEN Jian |
| author_sort | ZHANG Jian |
| collection | DOAJ |
| description | The K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped and K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped MgH<sub>2</sub> hydrogen storage composite systems were prepared by mechanical milling method. The microstructures and dehydrogenation properties of the prepared samples were characterized by some testing methods such as X-ray diffraction (XRD), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that the K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker not only plays the roles in refining the MgH<sub>2</sub> crystalline grain, but also inhibit the agglomeration of MgH<sub>2</sub> particles in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped system, which results in the decreased dehydrogenation temperature of MgH<sub>2</sub> matrix. When the mass ratio of K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> to MgH<sub>2</sub> is 3:7, the improvement effect on dehydrogenation properties of MgH<sub>2</sub> is the most remarkable. As compared with pure ball-milled MgH<sub>2</sub>, the dehydrogenation temperature of MgH<sub>2</sub> in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped system is decreased by nearly 75℃. For K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped<sup>s</sup>ystem, the dehydrogenation temperature of MgH<sub>2</sub> matrix is further decreased compared to K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped one due to the dual effects of refined MgH<sub>2</sub> crystalline grain by K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and destabilized MgH<sub>2</sub> lattice by Ni solution. As compared with pure ball-milled MgH<sub>2</sub>, the dehydrogenation temperature of MgH<sub>2</sub> in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped system is decreased by nearly 87℃. |
| first_indexed | 2024-04-11T02:13:31Z |
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| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:13:31Z |
| publishDate | 2016-11-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-fdf2800f728e4be1a553ab54c8f4e3d42023-01-03T01:48:58ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812016-11-01441110110610.11868/j.issn.1001-4381.2016.11.01720161117Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite SystemsZHANG Jian0TANG Wang1SHAO Lei2YU Xiao-feng3LONG Chun-guang4CHEN Jian5College of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaKey Laboratory of Efficient and Clean Energy Utilization, Education Department of Hunan Province, Changsha 410114, ChinaThe K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped and K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped MgH<sub>2</sub> hydrogen storage composite systems were prepared by mechanical milling method. The microstructures and dehydrogenation properties of the prepared samples were characterized by some testing methods such as X-ray diffraction (XRD), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that the K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker not only plays the roles in refining the MgH<sub>2</sub> crystalline grain, but also inhibit the agglomeration of MgH<sub>2</sub> particles in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped system, which results in the decreased dehydrogenation temperature of MgH<sub>2</sub> matrix. When the mass ratio of K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> to MgH<sub>2</sub> is 3:7, the improvement effect on dehydrogenation properties of MgH<sub>2</sub> is the most remarkable. As compared with pure ball-milled MgH<sub>2</sub>, the dehydrogenation temperature of MgH<sub>2</sub> in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped system is decreased by nearly 75℃. For K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped<sup>s</sup>ystem, the dehydrogenation temperature of MgH<sub>2</sub> matrix is further decreased compared to K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker separate-doped one due to the dual effects of refined MgH<sub>2</sub> crystalline grain by K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and destabilized MgH<sub>2</sub> lattice by Ni solution. As compared with pure ball-milled MgH<sub>2</sub>, the dehydrogenation temperature of MgH<sub>2</sub> in K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker and Ni powder multi-doped system is decreased by nearly 87℃.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.11.017MgH<sub>2</sub>dopingK<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>Nidehydrogenation property |
| spellingShingle | ZHANG Jian TANG Wang SHAO Lei YU Xiao-feng LONG Chun-guang CHEN Jian Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems Cailiao gongcheng MgH<sub>2</sub> doping K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> Ni dehydrogenation property |
| title | Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems |
| title_full | Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems |
| title_fullStr | Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems |
| title_full_unstemmed | Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems |
| title_short | Microstructures and Dehydrogenation Properties of Ball-milled MgH<sub>2</sub>-K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>-Ni Composite Systems |
| title_sort | microstructures and dehydrogenation properties of ball milled mgh sub 2 sub k sub 2 sub ti sub 6 sub o sub 13 sub ni composite systems |
| topic | MgH<sub>2</sub> doping K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> Ni dehydrogenation property |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.11.017 |
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