退火对(La_(0.8)Nd_(0.2))_2Mg(Ni_(0.8-x)Co_(0.1)Mn_(0.1)Al_x)_9合金储氢性能的影响  

Effect of annealing treatment on hydrogen storage properties of (La_(0.8)Nd_(0.2))_2Mg(Ni_(0.8-x)Co_(0.1)Mn_(0.1)Al_x)_9 alloys

作　　者：黄显吞[1] 

机构地区：[1]百色学院物理与电信工程系,广西百色533000

出　　处：《金属热处理》2014年第2期15-18,共4页Heat Treatment of Metals

基　　金：广西自然科学基金(2011GXNSFA018034);广西高校特色专业及课程一体化建设项目(GXTSZY024)

摘　　要：（La0.8Nd0.2）2Mg（Ni0．8-xCo0.1Mn0.1Alx）9（x=0～0．15）系列合金经退火处理，合金电极具有较好的活化性能，经1～4次充放电循环就可达到最大放电容量，合金电极的最大放电容量Cmax得到提高，最大值为399．2mA·h／g（x=0）。并随着Al替代量的增加，合金电极的吸放氢平台压降低，而吸氢滞后增大。同时，退火处理能明显改善合金电极的循环稳定性，经60次充放电循环后，合金电极的容量保持率（S60）最大值为76．7％（x=0．1）。Annealing treatment was carried out on （La0.8Nd0.2 ）2Mg（Ni0.8-x Co0.1 Mn0.1Alx ）9 （X =0, 0.05, 0. 1, 0. 15） alloys. The results show that all the annealed （La0.8Nd0.2 ）2 Mg（Ni0.8-x Co0.1Mn0. 1Alx ）9 alloy electrodes have good activation performance, the maximum discharge capacity Cmax of all the annealed alloys is obtained by 1-4 cycles of charging and discharging, all of them are improved, and the maximum is 399.2 mA· h/g （x = 0）. With increasing the amount of AI substitution, the absorption and release hydrogen platform pressure of the alloys drops, but the hydrogen absorbing lag increases. At the same time, the annealing treatment can significantly improve the electrode cycle stability of all the alloys, the maximum of electrode capacity retention rate （S60） is 76. 7% （x =0. 1 ） when cycled sixty times of charging and discharging.

关 键 词：退火处理 储氢合金 电化学性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]