(La_(0.8)Nd_(0.2))_2Mg(Ni_(0.8-x)Co_(0.1)Mn_(0.1)Al_x)_9(x=0,0.05,0.1,0.15)合金储氢性能与电化学性能研究  

Research on Hydrogen Storage Properties and Electrochemical Performance of (La_(0.8)Nd_(0.2))_2Mg(Ni_(0.8-x)Co_(0.1)Mn_(0.1)Al_x)_9 (x=0,0.05,0.1,0.15) Alloys

作　　者：黄显吞[1] 

机构地区：[1]百色学院物理与电信工程系,广西百色533000

出　　处：《金属功能材料》2013年第4期6-10,共5页Metallic Functional Materials

基　　金：广西自然科学基金资助研究项目(2011GXNSFA018034);广西高校特色专业及课程一体化建设项目(GXTSZY024)

摘　　要：采用磁悬浮熔炼方法制备(La0.8Nd0.2)2Mg(Ni0.8-xCo0.1Mn0.1Alx)9(x=0,0.05,0.1,0.15)系列合金,系统研究了Al替代Ni对合金相结构、储氢性能及电化学性能的影响。XRD分析表明,铸态合金分别由LaNi5相及LaNi3相组成;P-C-T测试显示随着Al替代量的增加,在相同温度下,合金的最大吸氢量先增加后减少;电化学测试表明,随着x增加,合金电极的最大放电容量逐渐降低,最大放电容量由x=0时的347mA.h/g逐渐下降到x=0.15时的263mA.h/g。（La0.8Nd0.2）2Mg（Ni0.8.xCo0.1Mn0.1Alx）9（x=0,0.05,0.1,0.15）hydrogen storage alloys were prepared by used cold crucible maglev melting method. The alloy phase structure, hydrogen storage property and electrochemical performance in replace elements A1 with elements Ni was studied. X-ray diffraction（XRD） results show that the al- loy is mainly composition of LaNi5 phase and LaNi3 phase. The P-C-T testing show that the alloy hydrogen uptake of maximum first increase and reducing after increased in same temperature amount of Al replacement. The electro- chemical tests show that the alloy maximum electrode discharge capacity reduced gradually with the increasing x. Maximum discharge capacity for 347 mA ~ h/g（x=0） gradually decreases to 263 mA · h/g（x=0. 15）.

关 键 词：AB3型 储氢性能 循环稳定性 电化学性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]