Research Progress and Development Trends of Magnesium-Based (or Magnesium-Containing) Hydrogen Storage Materials
Magnesium-based (or magnesium-containing) materials are the promising solid hydrogen storage mediums due to the high gravimetric and volumetric hydrogen storage density. However,the high operation temperature,slow kinetics,and capacity decay severely limit their practical application. Based on the differences in chemical bonding,magnesium-based (or magnesium-containing) storage materials are divided into alloys and coordination compounds. Over the past dec-ades,much research has been undertaken to address the above mentioned issues through adjusting composition/structure,doping catalyst,micro-nanosizing and combing with other hydrides,resulting in significant improvements in kinetics rather than thermodynamics. Therefore,extra elec-tric heating is still required to facilitate hydrogenation/dehy-drogenation,which causes the low energy efficiency. Re-cent research focused on non-electrical heating energy,such as solar energy and waste heat,either directly or indirectly,providing new possibilities for the practical application of magnesium-based (or magnesium-containing) hydrogen storage ma-terials. This paper reviews the development of magnesium-based (or magnesium-containing) hydrogen storage materials and the milestones at each stage. Furthermore,the research direction is analyzed and discussed.
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