Improved hydrogen desorption properties of magnesium hydride with TiFe0.8Mn0.2, graphite and iron addition |
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| Affiliation: | 1. Department of Solid Material, University of Science, Unjong District, Pyongyang, DPR Korea;2. Department of Computational Material, Institute of Physics, Unjong District, Pyongyang, DPR Korea;3. Department of Theory Physics, Kim Il Song University, Daesong District, Pyongyang, DPR Korea;1. Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia;2. National University of Science and Technology «MISIS», Moscow, 119049, Russia;3. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, 8700, Austria;1. Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2-2-9 Machiikedai, Koriyama, 963-0298, Japan;2. Institute of Technology, Shimizu Corporation, 3-4-17, Etchujima, Koto-ku, Tokyo 135-8530, Japan;1. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;2. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;1. Research Center for New Energy Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. North University of China, Taiyuan 030051, PR China;1. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, PR China;2. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, PR China |
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| Abstract: | The high dehydrogenation temperature of magnesium-based hydride (MgH2) is still a challenge as a potential hydrogen storage material in automobile applications. To improve the hydrogen desorption properties of MgH2; we selected TiFe0.8Mn0.2, graphite and Fe as additives. We prepared the Mg–graphite, Mg–TiFe0.8Mn0.2–Fe, Mg–TiFe0.8Mn0.2–graphite, Mg–Fe–graphite and Mg–TiFe0.8Mn0.2–Fe–graphite composites with high-energy ball milling under argon atmosphere. We investigated the effects of graphite and Fe addition to the desorption mechanism of TiFe0.8Mn0.2 using X-ray diffractometer (XRD), scanning electron microscope, differential scanning calorimeter and pressure-composition-temperature measurements using Sievert apparatus. We observed MgH2 in Mg–TiFe0.8Mn0.2–graphite, Mg–Fe–graphite and Mg–TiFe0.8Mn0.2–Fe–graphite with XRD analyses after hydrogenation at 200 °C under a hydrogen pressure of 2.5–2.6 MPa. As compared to pure milled MgH2 powder, we found that the dehydrogenation peak temperatures are decreased by 90, 160 and 165 °Cfor Mg–TiFe0.8Mn0.2–graphite, Mg–Fe–graphite, and Mg–TiFe0.8Mn0.2–Fe–graphite composites, respectively. The co-addition of TiFe0.8Mn0.2, graphite, and Fe exhibit the synergistic effects in improving the hydrogen desorption properties of MgH2. |
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| Keywords: | Hydrogen storage Ball milling Magnesium Titanium-iron-manganese alloy Iron Graphite |
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