以单质钛粉和镍粉为原料,通过机械合金化的方法制备了非晶态Ti2Ni合金,采用扫描电镜分析、X射线衍射、差热分析、充放电测试及电位阶跃测试等方法系统研究了Ti2Ni合金粉体的结构变化以及合金电极的储氢性能.结果表明:随球磨时间的延长,粉体颗粒尺寸先增大后减小；球磨至30 h时,获得了非晶态的Ti2Ni,随后的球磨使非晶合金粉体的稳定性不断增大；球磨80 h所得到合金的储氢性能最好,最大放电容量达到147 mAh·g-1,循环30次后的容量保持率为92.5％,氢的扩散系数为2.18×10-11 cm2·s-1.
参考文献
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