掺杂对氢化燃烧合成镁基储氢合金性能的影响

The Effect of Doping Agent on Synthesis Magnesium Nickel Hydrogen Storage Alloys

借助XRD、SEM和自制放氢量的测试装置研究了掺杂对氢化燃烧合成镁镍储氢合金性能的影响。结果表明：三种掺杂中以掺富铈镧系金属产生的镁镍氢化物最多,掺铜产生镁镍氢化物的晶格畸变最为明显。晶胞分析显示Mg_2NiH_4的晶胞参数都有一定的变化。300℃、0．1 MPa下放氢速率的测量显示,掺杂降低了放氢温度,放氢速率一般为6～10 min。掺铜放氢量为2．68％,掺钛放氢量为2．35％,掺富铈镧系金属放氢量为3．10％,掺钛、掺富铈镧系金属活化可适当提高吸放氢量。

The effect of doping agent on synthesis magnesium nickel hydrogen storage alloys through XRD, SEM and measure equipment of dehydriding velocity and dehydriding content are studied. The results show that magnesium nickel hydride is most produced by doping rich Ce lanthanum system alloy. Magnesium nickel hydride＇s crystal lattice aberrance doped Cu was the most evident. Crystal analysis indicated Mg2NiH4 crystal parameter had been changed. Dehydriding temperature would descend after doping element and dehydriding velocity was 6-10 min. Dehydriding capacity doped Cu, Ti, rich Ce lanthanum system alloy is 2.63 %, 2.35 % and 3.10 % respectively at 300℃, 0.1 MPa. Activation could improve hydriding and dehydriding content to doping Ti and rich Ce lanthanum system alloy.