A new reversible Mg3Ag-H-2 system for hydrogen storage

作者：Si T Z; Zhang J B; Liu D M; Zhang Q A^*

来源：Journal of Alloys and Compounds, 2013, 581: 246-249.

DOI：10.1016/j.jallcom.2013.07.054

• Hydrogen storage
• Mg-based compound
• Thermodynamics
• Cyclic stability

For the first time, the compound Mg3Ag was employed as a medium for hydrogen storage. It has been demonstrated that the hydriding/dehydriding process of Mg3Ag is reversible through the reaction Mg-3-Ag + 2H(2) <-> 2MgH(2) + MgAg with obtaining altered thermodynamics. An enhanced cycling stability is also achieved by the capacity retention of 95% after 30 cycles, much higher than 70% for the pure Mg sample, which can be explained that the agglomeration and sintering of the resulting MgH2 are efficiently prevented by the formation of hard and brittle MgAg phase upon multi-cycling.

• 出版日期2013-12-25
• 单位安徽工业大学