Structures and properties of La-Mg-Ni system hydrogen storage alloys

摘要：

The double-roller rapid quenching technology was successfully used to prepare La-Mg-Ni system hydrogen storage alloys.The effects of magnesium content and heat-treatment process on the alloys properties were studied.When the alloy with 1.09％(mass fraction) Mg is heat treated at 900 ℃ for 4 h ,its discharge capacity is more than 380 mA·h/g at 0.2C,and the cyclic life is beyond 500 counts at 2C.By XRD and PCI analyzing,the results show that the alloys are composed of LaNi5 and LaNi3 phase.The hydrogen absorption/desorption pressure of the alloy increases,so does the slope of plateau,and the plateau becomes broad first and narrow again as Mg content increases.This method is simple to be suitable for production on a large scale.

关键词： La-Mg-Ni hydrogen storage alloy structures properties double-roller rapid quenching

作者: XIAO Fang-ming WANG Ying TANG Ren-heng LU Qi-yun PENG Neng

作者单位: Research Institute of Rare Metal,Guangzhou Research Institute of Non-ferrous Metals,Guangzhou 510651,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）