TiFe_(0.9-x)Ni_xZr_(0.1)Mn_(0.2)(x=0.1,0.2,0.3,0.4)合金的贮氢性能研究  

Investigation on hydrogen storage properties of TiFe_(0.9-x)Ni_xZr_(0.1)Mn_(0.2)(x=0.1,0.2,0.3,0.4)alloys

作　　者：蓝志强[1,2] 李泽超[1,2] 高召习[1,2] 熊凯[1,2] 蒋卫卿[1,2] 

机构地区：[1]广西大学有色金属及材料加工新技术教育部重点实验室,广西南宁530004 [2]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2010年第5期835-840,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50861003);广西自然科学基金资助项目(桂科自0728028);广西大学科研项目(X081056);广西大学有色金属及材料加工新技术教育部重点实验室开放基金资助项目(GXKFJ-04);广西教育厅项目(2009MS07)

摘　　要：采用高频感应熔炼法制备TiFe0.9-xNixZr0.1Mn0.2（x=0.1,0.2,0.3,0.4）合金,系统地研究Ni部分取代Fe对TiFe0.9-xNixZr0.1Mn0.2（x=0.1,0.2,0.3,0.4）合金相组成与贮氢性能的影响。XRD分析结果表明：合金主要由NiTi,FeTi和（Fe,Ni）相组成,在x=0.1~0.2时,有少量的FeZr2相,随着Ni含量的增加,FeZr2相消失,同时有TiMn2相产生。压强—成分—温度（PCT）测试结果表明,TiFe0.6Ni0.3Zr0.1Mn0.2合金的贮氢量最高,其吸氢量为1.46 wt%。电化学测试结果显示,合金电极放电容量随着Ni含量的增加而增大,TiFe0.8Ni0.1Zr0.1Mn0.2合金的放电容量为34 mAh/g,而TiFe0.5Ni0.4Zr0.1Mn0.2合金电极的放电容量则达156 mAh/g。Hydrogen storage alloys TiFe0.9-xNixZr0.1Mn0.2（x=0.1,0.2,0.3,0.4）were prepared by induction melting under argon atmosphere,the effects of Ni substitution for Fe on the hydrogen storage and electrochemical properties were investigated systematically by pressure-composition-temperature（P-C-T）and electrochemical measurements.X-ray diffraction（XRD）results showed that all the alloys mainly consist of NiTi,FeTi and（Fe,Ni） phases.There were some FeZr2 phase in the alloys when x=0.1~0.2 and it disappeared while a new phase of TiMn2 generated with the increasing of Ni content.The pressure-composition-temperature（PCT） testing results show that TiFe0.6Ni0.3Zr0.1Mn0.2 alloy has the best hydrogen storage capacity and the maximum amount of absorbed hydrogen was measured to be about 1.46 wt%;it was also found that the electrochemical capacity increases with the increase of Ni content.And the discharge capacity of TiFe0.8Ni0.1Zr0.1Mn0.2 alloy electrode was 34 mAh/g while that of the TiFe0.5Ni0.4Zr0.1Mn0.2 sample was 156 mAh/g.

关 键 词：TIFE合金 贮氢性能 电化学容量 

分 类 号：TG139.7[一般工业技术—材料科学与工程]