Structure and hydrogen storage performance of LaNi_(4.25)Al_(0.75) alloy  

LaNi_(4.25)Al_(0.75)合金的结构与储氢性能(英文)

作　　者：曹大力[1] 陈德敏 刘艺[1] 马雷[1] 吕曼祺 杨柯 

机构地区：[1]沈阳化工学院材料科学与工程学院,沈阳110141 [2]中国科学研究院金属研究所,沈阳110016

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第3期517-522,共6页中国有色金属学报（英文版）

基　　金：Project (50276063) supported by the National Natural Science Foundation of China

摘　　要：Hydrogen storage properties of LaN4.25Al0.75 alloy were experimentally investigated by XRD, PC isotherm curves, hydrogen absorption kinetics curves, XPS and its particle diameter. The structure of unit cell of LaNi4.25Al0.75 alloy was deduced. The relationship between its structure and hydrogen storage performance of LaNi4.25Al0.75 alloy was analyzed. The results show that LaNi4.25Al0.75 alloy has rapid hydrogen absorption rate and good resistance to combustibility. It is also found that the function of the hydrogen absorption plateau pressure and temperature is ln peq=-4 820/T＋12.46, and the hydrogen absorption rate of the alloy decreases with increasing the temperature.采用XRD、吸氢PCT曲线、吸氢动力学曲线、XPS和粒径分析等测试方法,研究LaNi4.25Al0.75合金的结构和储氢性能;推导LaNi4.25Al0.75合金的四晶胞结构,分析LaNi4.25Al0.75合金的结构与性能的内在联系。结果表明:LaNi4.25Al0.75合金具有快速吸氢性能和较好的抗燃烧能力,其吸氢平台压和温度之间的函数关系式为lnpeq=-4820/T+12.46,合金的吸氢速率随着温度的升高而降低。

关 键 词：hydrogen storage alloy LaNi4.25Al0.75 microstructure resistance to combustibility 

分 类 号：TG139.7[一般工业技术—材料科学与工程]