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Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20)復(fù)合合金的相結(jié)構(gòu)對電化學(xué)性能的影響
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內(nèi)蒙古工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,內(nèi)蒙古工業(yè)大學(xué)材料科學(xué)與工程學(xué)院

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TG139+.7

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內(nèi)蒙古自然科學(xué)基金（2014MS0508）資助項(xiàng)目


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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School of Material Science and Engineering,Inner Mongolia University of Technology,School of Material Science and Engineering,Inner Mongolia University of Technology

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    摘要:

    采用XRD、SEM+EDS和電化學(xué)性能測試儀對復(fù)合合金Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20)的相結(jié)構(gòu)及其在323K下電化學(xué)性能進(jìn)行表征。結(jié)果表明，隨LaNi5的添加，合金由胞狀晶的BCC結(jié)構(gòu)的Ti-V-Cr基相和體心四方結(jié)構(gòu)的Cr-Ni-Ti-Fe為主相逐漸轉(zhuǎn)變?yōu)闃渲У腡i-V-Cr-Fe-Ni為主相的BCC單結(jié)構(gòu)。電化學(xué)性能顯示，隨x的變化，復(fù)合合金的活化及放電容量等呈規(guī)律性變化。x=5時(shí)，合金的活化和放電容量明顯改善，需9次活化且達(dá)到最大值360mAh/g，這是因?yàn)榘魻罹У男纬珊偷诙郈r-Ni-Ti-Fe相與Ti-V-Cr基主相獨(dú)特的協(xié)同作用。

    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.

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崔俊杰,劉向東. Ti1.8(VFe)CrNi0.2+xwt%LaNi5(x=0,5,10,20)復(fù)合合金的相結(jié)構(gòu)對電化學(xué)性能的影響[J].稀有金屬材料與工程,2018,47(6):1800~1805.[cuijunjie, 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.]
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  • 收稿日期:2016-12-15
  • 最后修改日期:2017-03-05
  • 錄用日期:2017-03-15
  • 在線發(fā)布日期: 2018-09-06
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