A_2B_7型La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x(x=0-0.3)合金相结构及电化学性能
许剑轶1; 闫汝煦2; 王大辉1; 罗永春1; 徐广胜1; 康龙2
2007
Source Publication稀有金属材料与工程
ISSN1002-185X
Volume36Issue:2Pages:349-353
Abstract采用感应熔炼方法制备了A_2B_7型La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x(x=0,0.02,0.06 0.1,0.3)四元贮氢合金,系统研究了Al元素部分替代Ni对A2B7型La_(0.75)Mg_(0.25)Ni_(3.5)合金相结构及电化学性能的影响。X射线衍射(XRD)分析表明:La_(0.75)Mg_(0.25)Ni_(3.5)由单一La_2Ni_7相组成:Al元素加入后,开始出现CaCu_5型LaNi_5相,当x=0.3时,LaNis相成为合金的主相。Rietveld分析表明:随着Al含量的增加,LaNi_5相逐渐增多,Al的加入利于CaCu_5型LaNi_5相的形成。电化学测试表明:Al替代Ni对A2B7型合金La_(0.75)Mg_(0.25)Ni_(3.5)电极活化性能影响不大:而最大放电容量随Al在La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x,合金中替代量的增加而减小。当放电电流密度为1600mA/g时,合金的倍率放电性能由68.8%(x=0)增加到81.16%(x=0.1)然后减小到65.67%(x=0.3)。此外,La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x合金电极循环稳定性先增加而后下降。x=0.06时合金电极容量保持率最大(S100=85.21.%)。
KeywordA2B7型贮氢合金 Al替代 晶体结构 电化学性能
Indexed ByCSCD
Language中文
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMETALLURGY METALLURGICAL ENGINEERING
CSCD IDCSCD:2759501
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/75968
Collection材料科学与工程学院
Affiliation1.兰州理工大学, 兰州, 甘肃 730050, 中国
2.甘肃省有色金属新材料国家重点实验, 甘肃省有色金属新材料国家重点实验室室, 兰州, 甘肃 730050, 中国
First Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
许剑轶,闫汝煦,王大辉,等. A_2B_7型La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x(x=0-0.3)合金相结构及电化学性能[J]. 稀有金属材料与工程,2007,36(2):349-353.
APA 许剑轶,闫汝煦,王大辉,罗永春,徐广胜,&康龙.(2007).A_2B_7型La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x(x=0-0.3)合金相结构及电化学性能.稀有金属材料与工程,36(2),349-353.
MLA 许剑轶,et al."A_2B_7型La_(0.75)Mg_(0.25)Ni_(3.5-x)Al_x(x=0-0.3)合金相结构及电化学性能".稀有金属材料与工程 36.2(2007):349-353.
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