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The hydrogen sorption kinetics of MgH2‒VO2(B) composites synthesised by mechanical milling have been studied. The microstructural properties of composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, Scanning electron microscopy (SEM), Particle size analysis (PSD), while sorption behaviour was followed by differential scanning calorimetry (DSC) and Sievert measurements. Results have shown that although desorption temperature reduction is moderate; there is a substantial improvement in hydrogen sorption kinetics. The complete desorption of pure MgH2 at elevated temperature takes place in more than 30 min while the composite fully desorbs in less than 2 min even at lower temperatures. It has been shown that the metastable γ–MgH2 phase and the point defects have a decisive role in desorption process only in the first sorption cycle, while the second and the …
Publication date: 
1 Mar 2016

Sanja Milošević, Sandra Kurko, Luca Pasquini, Ljiljana Matović, Radojka Vujasin, Nikola Novaković, Jasmina Grbović Novaković

Biblio References: 
Volume: 307 Pages: 481-488
Journal of Power Sources