Mg-20%(RE-Ni)(RE=La,Y,Mm)复合材料储放氢性能研究

中国稀土学报, 2008, 26(5): 624-628.

Mg-20%(RE-Ni)(RE=La,Y,Mm)复合材料储放氢性能研究

李志念 ^1, , 蒋利军 ^2, , 刘晓鹏 ^3, , 王树茂 ^4, , 李华玲 ^5, , 詹锋 ^6,

1.北京有色金属研究总院能源材料与技术研究所,北京100088

2.北京有色金属研究总院能源材料与技术研究所,北京100088

3.北京有色金属研究总院能源材料与技术研究所,北京100088

4.北京有色金属研究总院能源材料与技术研究所,北京100088

5.北京有色金属研究总院能源材料与技术研究所,北京100088

6.北京有色金属研究总院能源材料与技术研究所,北京100088

基金项目: 国家高技术研究发展计划(863计划)(2006AA05Z131和2006AA05Z144)

关键词： Mg基复合储氢材料 , 催化反应球磨 , 吸放氢动力学 , PCT曲线 , 稀土

Preparation and Hydrogen Storage Properties of Mg-20 % (RE-Ni) (RE = La, Y, Mm) Composites

通过磁悬浮熔炼和反应球磨相结合的方法成功制备出Mg-20wt%(RE-Ni)(RE=La,Y,Mm)复合储氢材料,主要研究了材料的物相结构和储放氢性能.结果表明.Mg-20wt%(RE-Ni)(RE=La,Y,Mm)复合储氢材料,具有相似的物相结构和吸放氢热力学性能,吸氢相均为MgH2和Mg2Ni,在同一温度下,合金只有一个放氢平台,表明两相具有良好的协同放氢效应.在复合体系中,Mg-20wt%(Y-Ni)具有最佳的综合储氢性能,表明Y具有最佳的催化效果,其在293 K,3.0 MPa H2,10 min的吸氢量和573 K,对0.1 MPa,15 min的放氢量可分别达到3.92%和4.75%,实现了室温快速大量吸氢和较温和条件下的快速放氢.

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