纳米Ni粉和LaNi5添加量对Ti1.8(VFe)CrNi0.2储氢合金组织结构与电化学活化性能的影响  

Effects of Nano-Nickel Powder and LaNi5 Addition on Microstructure and Electrochemical Activity of Hydrogen Storage Alloy Ti1.8(VFe)CrNi0.2

作　　者：崔俊杰 刘向东[1,2] CUI Jun-jie;LIU Xiang-dong(College of Materials Science and Engineering,Inner Mongolian University of Technology,Hohhot,Inner Mongolia 010051,China;Inner Mongolian Key Laboratory of Materials Formation and Control Engineering,Hohhot,Inner Mongolia 010051,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]内蒙古自治区高校材料成型及控制工程重点实验室,内蒙古呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2020年第4期256-264,共9页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自然科学基金项目(2019LH05027)。

摘　　要：通过球磨法分别制备了Ti1.8(VFe)CrNi0.2+xwt%Ni(x=25,50,100)和Ti1.8(VFe)CrNi0.2+5wt%Ni+ywt.%LaNi5(y=5,10)复合材料,并研究了纳米Ni粉和LaNi5合金对Ti1.8(VFe)CrNi0.2合金微观组织、活性和放电容量的影响.结果表明,在Ti1.8(VFe)CrNi0.2+50wt%Ni+5wt%LaNi5复合材料中,在首次循环后比容量达到384mAh/g,高于Ti1.8(VFe)CrNi0.2+5wt%Ni复合材料的316mAh/g,证实了纳米Ni粉对该合金首次活化的重要作用,而LaNi5则抑制了非晶相生成,显著提高了比容量,表明了添加复合纳米Ni粉和LaNi5是改善Ti1.8(VFe)CrNi0.2合金活化和放电容量的有效方法.The composites containing Ti1.8(VFe)CrNi0.2+xwt%Ni(x=25,50,100)and Ti1.8(VFe)CrNi0.2+5wt%Ni+ywt.%LaNi5(y=5,10)were prepared by the ball-milling method and the effects of the increasing nano nickel content and LaNi5content on the microstructure,activity and discharge capacity were investigated.The results indicate that there exhibits the maximum discharge capacity of 384 mAh/g on the first cycle in the Ti1.8(VFe)CrNi0.2+50wt%Ni+5wt%LaNi5 composite,which is larger than the maximum discharge capacity of 316mAh/g of the Ti1.8(VFe)CrNi0.2+50wt.%Ni composite.This suggests that nano-nickel powder plays a vital importance for the first cycle activity whereas the inhibition of amorphous phase is achieved by the addition of LaNi5,leading to the notable improvement of discharge capacity.The findings suggest that the activity and discharge capacity of Ti1.8(VFe)CrNi0.2 alloy can be effectively improved by adding nano-nickel powder and LaNi5 simultaneously.

关 键 词：Ti-(VFe)-Cr基合金 活性 纳米Ni粉 LANI5 

分 类 号：TG139.7[一般工业技术—材料科学与工程]