Mg+10%Ni_2P储氢材料的相结构和吸放氢性能  

Phase-structure and Hydrogen Storage Behaviors of Mg+10% Ni_2P Composite Prepared by Reactive Ball-Milling

作　　者：彭书科[1] 肖学章[1] 杭州明[1] 吴凡[1] 李长旭[1] 李寿权[1] 陈立新[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2011年第8期1387-1391,共5页Rare Metal Materials and Engineering

基　　金：国家高技术研究与发展计划(2006AA05Z144);教育部新世纪优秀人才支持计划(NCET-07-0741);浙江省重大科技专项(2006C11233)

摘　　要：采用反应球磨法制备了Mg+10%Ni2P(质量分数,下同)新型复合物,对比研究了球磨复合物和球磨纯镁的相结构与储氢性能。研究表明:在纯Mg中添加10%的Ni2P进行复合球磨,可以明显提高其吸/放氢性能。此外,添加Ni2P球磨明显地改善了镁的循环放氢性能。复合物的晶粒尺寸随着球磨时间的增加而减小;添加Ni2P能有效地抑制Mg/MgH2在吸/放氢过程中产生团聚;在Mg中添加Ni2P球磨能降低体系的放氢反应温度。Mg＋10%Ni2P composite （mass fraction,similarly hereinafter） and pure magnesium samples were prepared by reactive ball-milling under hydrogen atmosphere,and their phase-structure and hydrogen storage behavior were investigated systemically.The results show that the hydrogen absorption/desorption kinetics of pure Mg are markedly improved by adding 10% Ni2P.Furthermore,the catalytically enhanced kinetic property is found to persist in the de-/hydrogenation cycles.The size of crystal grains of the composite is reduced by prolonging the ball-milling time.Ni2P is effective in inhibiting the aggregation of Mg during the de-/hydrogenation processes.The doping of Ni2P can lower the dehydriding temperatures of the hydriding Mg-Ni2P composites.

关 键 词：Mg基储氢材料 NI2P 反应球磨 相结构 储氢性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程] TG146.32[金属学及工艺—合金]