纳米晶和非晶Mg20-xLaxNi10(x=0-6)贮氢合金的贮氢行为(英文)

被引:3
作者
张羊换 [1 ,2 ]
李保卫 [2 ]
任慧平 [2 ]
郭世海 [1 ]
祁焱 [1 ]
王新林 [1 ]
机构
[1] 钢铁研究总院
[2] 内蒙古科技大学
关键词
Mg2Ni型贮氢合金; 快淬; 结构; 贮氢行为;
D O I
暂无
中图分类号
TG139.7 [];
学科分类号
080502 ;
摘要
用快淬技术制备了Mg2Ni型贮氢合金,合金的名义成分为Mg20-xLaxNi10(x=0,2,4,6)。用XRD、SEM、HRTEM分析了合金的微观结构。发现不含La的快淬合金中没有非晶相,但含La快淬合金中显示以非晶相为主。当La含量x≤2时,铸态合金的主相为Mg2Ni相,但随着La含量的进一步增加,铸态合金的主相改变为(La,Mg)Ni3+LaMg3相。应用Sieverts设备研究了铸态及快淬态合金的吸放氢量及动力学,结果表明,x=2的合金吸放氢量及动力学随淬速的增加而增加,但对于x=6的合金,结果是相反的。电化学测试结果表明,x=2合金的放电容量随淬速的增加而增加,而对于x=6合金,结果也是相反的。快淬显著地提高了x=2,6合金的循环稳定性。
引用
收藏
页码:1317 / 1322
页数:6
相关论文
共 13 条
[1]  
Mechanism of rapid degradation of nanostructured Mg2Ni hydrogen storage alloy electrode synthesized by mechanical alloying and the effect of mechanically coating with nickel. Goo Nom Hoom,Woo Jung Hoon,Lee Kyung Sub. Journal of Alloys and Compounds . 1999
[2]  
Improvement of the MgH2 formation-decomposition reaction: kinetic study of the CeMg11 Ni system. Hammioui M E,Belkbir L,Gerard N. Zeitschrift fur Physikalische Chemie . 1992
[3]  
Electrochemical characteristics of a homogeneous amorphous alloy prepared by ball-milling Mg 2 Ni with Ni. Nohara S,Fujita N,Zhang S G,et al. Journal of Alloys and Compounds . 1998
[4]  
Thermal stabilities and discharge capacities of melt-spun Mg-Ni-based amorphous alloys. Yamaura S,Kim H,Kimura H,et al. Journal of Alloys and Compounds . 2002
[5]  
Teresiak A,Gebert A,Savyak M et al. Journal of Alloys and Compounds . 2005
[6]  
Investigation on structures and electrochemical performances of the as-cast and quenched La0.7Mg0.3Co0.45Ni2.55-xFex (x=0-0.4)electrode alloys. ZHANG Y H,LI B W,REN H P,CAI Y,DONG X P,WANG X L. International Journal of Hydrogen Energy . 2007
[7]  
Liu Y N,Zhang X J. Journal of Alloys and Compounds . 1998
[8]  
Liu F J,,Suda S. Journal of Alloys and Compounds . 1995
[9]  
Mechanisms for fracture and fatigue-crack propagation in a bulk metallic glass. KIMURA H,MASUMOTO T. Scripta Metallurgica . 1975
[10]  
An electrochemical investigation of mechanical alloying of MgNi-based hydrogen storage alloys. Jian-Jun Jiang,Michael Gasik. Journal of Power Sources . 2000