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More efficient lithium-ion batteries could be produced more cheaply by harnessing the high pressures generated during the manufacturing process.
This paper explains the effect of structural behaviour and electrical properties of cubic NaZn13-type La(FeSi)13 compounds annealed at different high temperatures from 1000ºC to 1200ºC. The Raman spectroscopy measurement revealed a different level of coexistence of La(FeSi)13-type phase and α-Fe in 1000ºC, 1100ºC and 1200ºC annealed samples. The different level coexistence of the phases suggested that the samples show a significant phase change with different annealing temperature. This finding has also supported by impedance analyzer measurement, where the pattern shows that the 1000ºC...
Since the discovery of magnetocaloric effect (MCE), numbers of method in producing magnetocaloric materials has been studied. Among those methods, ball milling has been shown as a very versatile technique with several advantages compared to other preparation methods. In this work, the effect of ball milling preparation technique on the phase structural behaviour and electrical properties of MnCoGe alloys has been analysed. The changes in the structural behaviour have been studied by X-ray powder diffraction (XRD) and Raman Spectroscopy. The results suggest that the samples show significant str...
Abstract Here, we demonstrate a quasi-solid-state template strategy to synthesis highly dispersed supported metal catalysts on nitrogen-doped carbon (M-N-C) with a large fraction of single atom Ni species, in which dispersion of metal precursor, evaporation of solvent and downsizing of templates can be simultaneously achieved during the one-step ball-milling process. The incorporation of such nickel-based catalysts into MgH greatly improved the kinetics with the reduced activation energy of 87.2 ± 5.4 kJ mol (156.5 ± 3.2 kJ mol for blank). The versatility of this method is confirmed by t...