摘要
以氢气作为保护气 ,用机械合金化的方法 ,将镁粉、镍粉和氯化铬制备成纳米复合物 ,实验证明它具有很好的储氢性能。氯化铬起到了提高吸放氢速度和降低放氢温度的作用。在添加CrCl3 的样品中 ,镁粉末在球磨过程中能完全吸氢 ,而没有添加CrCl3 的试样则很难完全吸氢。用机械合金化制备的Mg96Ni3 (CrCl3 ) 1纳米复合物在 16 0℃和 2MPa氢压条件下 ,在 6 5s内储氢容量达到 6 .0 % ,并能使放氢温度降低到 315℃ ,与不加CrCl3 的样品相比 ,放氢温度降低 15～ 2 0℃。
Effects of CrCl 3 on hydrogen storage properties of Mg Ni system were investigated. The nanocomposite of Mg Ni CrCl 3 was produced by mechanical milling under hydrogen pressure of 0.6?MPa. The nanocomposite has a remarkable kinetics of hydrogenation and dehydrogen, in which CrCl 3 plays a key role. It can promote kinetics behavior and decrease temperature of dehydriding. The sample containing CrCl 3 can completely absorb hydrogen in ball milling process. For example, the nanocomposite of Mg 96 Ni 3(CrCl 3) 1 can absorb 6.0% hydrogen in 65?s at 160?℃ under 2.0?MPa hydrogen pressure and decrease temperature of dehydriding about 15～20?℃ compared with that without CrCl 3.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第6期1031-1036,共6页
The Chinese Journal of Nonferrous Metals
