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崔俊杰,刘向东.Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20)复合合金的相结构对电化学性能的影响[J].稀有金属材料与工程(英文),2018,47(6):1800~1805.[cuijunjie and Liu Xiangdong.Influence of Phase Structure on electrochemical Properties of Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20) composite Alloy[J].Rare Metal Materials and Engineering,2018,47(6):1800~1805.]
Influence of Phase Structure on electrochemical Properties of Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20) composite Alloy
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Received:December 15, 2016  Revised:March 05, 2017
DOI:
Key words: Ti-V-based solid solution  composite alloy  phase structure  electrochemical properties
Foundation item:内蒙古自然科学基金(2014MS0508)资助项目
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cuijunjie and Liu Xiangdong  
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Abstract:
      XRD, SEM+EDS and electrochemical tester at 323K were adopted to measure phase structure and electrochemical properties of Ti1.8(VFe)CrNi0.2+x.wt%LaNi5 hydrogen storage composite. It has showed that main phase, which is BCC structure with alloy’s cellular crystal and Cr-Ni-Ti-Fe with BCT structure, transformed into Ti-V-Cr-Fe-Ni which is main phase of BCC structure with dentrite crystal. Electrochemical properties show that activity and discharge capacity and so on is changed regularly. When x is 5, activity and discharge capacity of the composite alloy is the best of all, which is active by 9 cycle time and the discharge capacity reach 360mAh/g. It can be certain that the formation of rod-like crystal and synergistic reaction between the second phase Cr-Ni-Ti-Fe phase and the main phase of BCC structure plays the most important role in ipproving the alloy’s electrochemical properties.