La-Mg-Ni系储氢合金储氢性能研究  

Hydrogen storage properties of La-Mg-Ni hydrogen storage alloys

作　　者：彭能[1,2] 苏玉长[1] 肖方明[2] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]广东省工业技术研究院(广州有色金属研究院),广东广州510650

出　　处：《材料研究与应用》2011年第2期121-124,共4页Materials Research and Application

摘　　要：采用快淬法制备了不同镁含量的La-Mg-Ni系储氢合金,并研究了La-Mg-Ni系储氢合金的储氢特性.结果表明,La-Mg-Ni系储氢合金主要由LaNi5和LaNi3两相组成;随着镁含量的增加,储氢合金的吸放氢平台压力降低,吸氢量提高;与化学计量比储氢合金相比,非化学计量比的储氢合金平台压力提高;在1173 K热处理4 h后,储氢合金具有较好的吸/放氢平台性能,其吸氢量可达1.59%.La-Mg-Ni hydrogen storage alloys with different Mg content were prepared by rapid quenching method and hydrogen storage properties of these alloys were investigated. XRD results showed that theses alloys were mainly composed of LaNi5 and LaNi3 ; with the increase of Mg content, the hydrogen absorption/desorption plateau pressure of the alloys lowered and their hydrogen absorption capacity increased; plateau pressure of the non-stoichiometric hydrogen storage alloys increased compared to the stoichiometric hydrogen storage alloy; after 4 hours of heat treatment at 1173 K, the hydrogen storage alloy had good absorption/desorption plateau performance with hydrogen absorption capacity up to 1.59% .

关 键 词：快淬法 La—Mg—Ni系储氢合金 储氢性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]