Mg/Mg_(1.8)La_(0.2)Ni纳米复合材料的吸放氢性能研究  

Hydriding and Dehydriding Properties of Mg/Mg_(1.8)La_(0.2)Ni Nanocomposites

作　　者：孙洪亮[1] 张燕燕[1] 张海昌[1] 杨化滨[1] 周作祥[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《电化学》2007年第2期132-135,共4页Journal of Electrochemistry

基　　金：国家"863"计划资助项目(2003AA515022)资助

摘　　要：应用高能球磨法制备Mg-x%Mg1.8La0.2Ni(x=10、20和30)纳米复合储氢材料.X射线衍射(XRD)、透射电镜(TEM)和选区电子衍射(SAED)测试表明,该复合材料具有纳米晶和非晶态混合结构的性质,吸氢温度降低,较好的吸放氢动力学性能,在423K,2.5MPa氢压的条件下,50s内即可达到最大吸氢量.Mg-x % Mg1.8La0.2 Ni （x = 10,20 and 30） nanocomposites have been synthesized by high-energy ball milling method. Results of the X-ray diffraction （ XRD）, transmission electron microscopy （TEM） and selected area electron diffraction （SAED） tests were showed that each composite had a nanocrystalline/amorphous structure, which was beneficial for the improvement of the hydriding and dehydriding properties of Mg. The hydrogen absorption temperature decreased and the hydrogen sorption kinetics were improved. Under the conditions of 423 K and the hydrogen pressure of 2.5MPa, each composite could reach the maximum hydriding capacity within 50 S.

关 键 词：燃料电池 镁基合金 复合储氢材料 高能球磨 

分 类 号：TB383.1[一般工业技术—材料科学与工程]