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采用浸渍-还原法制备了LaNi4.8Sn0.2/CNTs和NdNi4.8Sn0.2/CNTs两种复合材料,在室温、1.0MPa氢压下,分别可获得2.96%和2.88%(质量分数)的储氢量.在相同条件下,该储氢值为MNi4.8Sn0.2(M=La,Nd)合金粒子储氢量的3倍,此结果可归因于合金粒子与纳米碳管(CNTs)之间的协同作用.XRD和TEM测试结果表明,合金粒子粒径在30nm左右且较均匀地分布在CNTs载体上.储放氢实验显示,两种复合材料有较好的储氢稳定性,经历100个吸放氢周期后,其储氢降低率小于6%;同时,材料的晶体结构没有发现明显的变化.
The composites of LaNi4.8Sn0.2 / CNTs and NdNi4.8Sn0.2 / CNTs were prepared by impregnation-reduction method. The composites of 2.96% and 2.88% (mass fraction) Hydrogen content. Under the same conditions, the hydrogen storage value is three times of the hydrogen storage capacity of the MNi4.8Sn0.2 (M = La, Nd) alloy particles, which can be attributed to the alloy particles and carbon nanotubes XRD and TEM results show that the size of the alloy particles is about 30nm and more evenly distributed on the CNTs carrier.The hydrogen storage experiments show that the two composite materials have good hydrogen storage stability, After a period of hydrogen absorption and desorption, the hydrogen reduction rate was less than 6%. At the same time, no obvious change was observed in the crystal structure of the material.