Nanostructured hydrogen storage materials prepared by high-energy reactive ball milling of magnesium and ferrovanadium |
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| Affiliation: | 1. HySA Systems Competence Centre, South African Institute for Advanced Materials Chemistry (SAIAMC), University of the Western Cape, South Africa;2. Department of Chemistry, University of the Western Cape, South Africa;3. Institute for Energy Technology, Kjeller, Norway;1. School of Mechanical Engineering, University of Jinan, Jinan 250022, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;3. Department of Mechanical Engineering, Shandong Jiaotong University, Jinan 250022, China;1. Materials Research Simulation Laboratory, Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan;2. Department of Physics, Govt. College University, Faisalabad, 38000, Pakistan;3. Centre for Advanced Studies in Physics, Govt. College University, Lahore, 54000, Pakistan;1. School of Materials Science and Engineering and Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen 361024, China;2. School of Marine Engineering and Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering, Jimei University, Xiamen 361021, China;3. Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou 510632, China;1. Université de Lorraine, Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux (LEM3), UMR 7239, Ile du Saulcy, Metz F-57045, France;2. Université de Lorraine, Laboratory of Excellence on Design of Alloy Metals for Low-Mass Structures (DAMAS), Metz, France;3. Shanghai Engineering Research Center of Mg Materials and Applications & National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, PR China;1. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, 87317?51167, Iran;2. Faculty of Physics, University of Kashan, Kashan, 87317?51167, Iran;3. Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317?51167, Iran |
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| Abstract: | Hydrogen storage nanocomposites prepared by high energy reactive ball milling of magnesium and vanadium alloys in hydrogen (HRBM) are characterised by exceptionally fast hydrogenation rates and a significantly decreased hydride decomposition temperature. Replacement of vanadium in these materials with vanadium-rich Ferrovanadium (FeV, V80Fe20) is very cost efficient and is suggested as a durable way towards large scale applications of Mg-based hydrogen storage materials. The current work presents the results of the experimental study of Mg–(FeV) hydrogen storage nanocomposites prepared by HRBM of Mg powder and FeV (0–50 mol.%). The additives of FeV were shown to improve hydrogen sorption performance of Mg including facilitation of the hydrogenation during the HRBM and improvements of the dehydrogenation/re-hydrogenation kinetics. The improvements resemble the behaviour of pure vanadium metal, and the Mg–(FeV) nanocomposites exhibited a good stability of the hydrogen sorption performance during hydrogen absorption – desorption cycling at T = 350 °C caused by a stability of the cycling performance of the nanostructured FeV acting as a catalyst. Further improvement of the cycle stability including the increase of the reversible hydrogen storage capacity and acceleration of H2 absorption kinetics during the cycling was observed for the composites containing carbon additives (activated carbon, graphite or multi-walled carbon nanotubes; 5 wt%), with the best performance achieved for activated carbon. |
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| Keywords: | Magnesium hydride Hydrogen ball milling Ferrovanadium Carbon additives Kinetics Cycle stability |
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