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La1+xMg2-xNi9(x=0,0.5,1.0,1.5)合金的儲氫性能及電化學(xué)性能研究
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TG139.7

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國家自然科學(xué)基金(50561002);教育部科學(xué)技術(shù)研究重點項目(03104)和廣西大學(xué)科學(xué)技術(shù)研究重點項目(2004ZD04)


Hydrogen Storage Capacities and Electrochemical Performances of La1+xMg2-xNi9 (x=0, 0.5, 1.0, 1.5) Alloys
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    摘要:

    利用高頻熔煉方法制備了La1+xMg2-xNi9(x=0,0.5,1.0,1.5)系列合金,并對其進(jìn)行了XRD分析和儲氫容量及電化學(xué)性能測定。結(jié)果表明:隨著La含量增大,合金中LaNi5和(La,Mg)Ni3相轉(zhuǎn)變?yōu)長aNi3相,且Mg2Ni相出現(xiàn),晶胞體積也增大,合金的儲氫容量和電化學(xué)性能提高;當(dāng)x=1.5時,Mg2Ni相消失,合金的儲氫性能有所下降。當(dāng)x=1.0時,即La2MgNi9合金具有較好的儲氫容量及電化學(xué)容量。

    Abstract:

    The La1+xMg2-xNi9(x=0,0.5,1.0,1.5)alloys were prepared in high frequency induction furnace under Ar atmosphere.The compositions and phase structures of the prepared alloys were analyzed by XRD method,and their hydrogen storage capacities and electrochemical performances were investigated.The results show that with La content increasing,LaNi5 and(La,Mg)Ni3 phases are transferred to LaNi3 phase,Mg2Ni phase appears,the cell volume increases,and the hydrogen storage capacity and electrochemical performance are improved.While x=1.5,Mg2Ni phase disappears,the hydrogen storage properties of La2.5Mg0.5Ni9 alloy are impaired.The hydrogen storage capacity and electrochemical performance of La2MgNi9 alloy are better than those of the other three alloys.

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黃丹 鄭定山 肖榮軍 蔣衛(wèi)卿 郭進(jìn). La1+xMg2-xNi9(x=0,0.5,1.0,1.5)合金的儲氫性能及電化學(xué)性能研究[J].稀有金屬材料與工程,2006,35(12):1991~1994.[Huang Dan, Zheng Dingshan, Xiao Rongjun, Jiang Weiqing, Guo Jin. Hydrogen Storage Capacities and Electrochemical Performances of La1+xMg2-xNi9 (x=0, 0.5, 1.0, 1.5) Alloys[J]. Rare Metal Materials and Engineering,2006,35(12):1991~1994.]
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  • 收稿日期:2005-11-10
  • 最后修改日期:2006-01-23
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