Properties of hydrogen storage alloy Mg2−xAgxNi (x=0.05, 0.1, 0.5) by hydriding combustion synthesis

摘要: Abstract Mg 2− x Ag Ni ( =0.05, 0.1, 0.5) prepared by hydriding combustion synthesis were investigated means of pressure–composition isotherms, X-ray diffraction and scanning electron microscopy. The results showed that the maximum hydrogen absorption capacity 1.95 0.05 is 3.49 mass% 1.9 0.1 3.43 at 553 K, just after without any activation; their desorption capacities are 3.31 3.18 mass%, respectively. XRD explain it reasonable to add a little in 2 kinetics 0.1) storage alloy can be improved. relationships between equilibrium plateau pressure temperature for log P (0.1 MPa)=−2827/ T +5.677 (523 K ≤ 573 K) MPa)=−3581/ +6.818 dehydriding. That MPa)=−2725/ +5.354 MPa)=−3444/ +6.538