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研究了球磨添加CeO2对La2Mg17-50%(质量分数,下同)Ni复合合金的相结构和储氢性能的影响,并对合金的形貌和吸放氢性能进行了检测.XRD结果表明,球磨加入CeO2后,在La2Mg17-50% Ni合金中除了Mg2Ni和Ni相外,产生CeMg12相.SEM形貌图清晰地看见CeO2附在La2Mg17-50%Ni合金表面上呈白色小颗粒.吸氢动力学性能表明,加入CeO2后,使La2Mg17-50% Ni合金的最大吸氢量从3.298%增加到3.594%.添加CeO2后合金的最佳饱和吸氢温度降为200℃(3 MPa),且吸氢动力学性能提高至1 min内的吸氢量达到3.382%,是其最大吸氢量的94%.然而,CeO2在放氢过程中的积极作用并不明显.

参考文献

[1] LIU Jing,LI Qian.Hydriding/dehydriding behaviors of La2Mg17-10 wt.%Ni composite prepared by mechanical milling[J].稀土学报(英文版),2013(01):73-78.
[2] 李琳,范燕平,刘宝忠,刘宝林.La0.8Mg0.2(Ni2.7Co0.6Al0.1Mn0.1)x贮氢合金的电化学性能分析[J].稀土,2012(03):45-49.
[3] Wei Wang;Changpin Chen;Lixin Chen .Change in structure and hydrogen storage properties of La_2Mg_(16)Ni alloy after modification by mechanical grinding in tetrahydrofuran[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):175-179.
[4] Hongzhong Chi;Changpin Chen;Lixin Chen;Yue An;Qidong Wang .Hydriding/dehydriding properties of La_2Mg_(16)Ni alloy prepared by mechanical ball milling in benzene and under argon[J].International journal of hydrogen energy,2004(7):737-741.
[5] Linhui Gao;Changpin Chen;Lixin Chen .Hydrogen storage properties of La_(1.8)Ca_(0.2)Mg_(14)Ni_3 alloy prepared by ball milling in different milling environments[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):338-341.
[6] LI Xia,ZHAO Dongliang,ZHANG Yanghuan,XU Jianyi,ZHANG Guofang,ZHANG Yin.Hydrogen storage properties of mechanically milled La2Mg17-x wt.%Ni(x=0, 50, 100, 150 and 200) composites[J].稀土学报(英文版),2013(07):694-700.
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