Effective thermal conductivity of dimagnesium iron hexahydride (Mg2FeH6) for heat storage applications

Abstract The transient plane source method was applied to measure the effective thermal conductivity in dimagnesium iron hexahydride (Mg 2 FeH 6 ) prepared a high-pressure synthesis of 50 temperature-driven de-/hydrogenation cycles. Temperature- and pressure-dependent measurements as-synthesized Mg powder have been performed. Measurements for as synthesized were carried out between 100 bar temperature range from °C 300 at 70 480 520 during cycle test. varied 0.39 W m −1 K , recorded hydrogen gas pressure, 0.54 measured pressure. increased with elevated pressure temperature. An evidence found that presence prevents sintering powder, resulting constant all accomplished advantage non-sintered material higher diffusion, which leads faster reaction time. For cycles °C, be around ~ 1.0 dehydrogenated state (70 bar/520 °C) 0.7 0.8 hydrogenated bar/480 °C).