快淬态无钴LaNi_xCu_(4.5-x)Mn_(0.3)Al_(0.2)型贮氢合金特性的研究  

Investigation on characteristics of Co-free hydrogen storage alloy LaNi_xCu_(4.5-x)Mn_(0.3)Al_(0.2) prepared by rapid quenching

作　　者：张四奇[1] 彭能[1] 

机构地区：[1]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117-120,共4页Materials Research and Application

摘　　要：采用快淬工艺制备了LaNixCu4.5-xMn0.3Al0.2无钴贮氢合金,同时对其充放电性能进行了研究.结果表明:快淬态合金为CaCu5型单一相结构;随着贮氢合金中铜含量的增加,贮氢合金的放电比容量和活化性能降低,合金的放电平台明显降低,但循环性能得到明显提高,当x=3.0时,合金的充放电综合性能较好;与铸锭工艺相比,快淬工艺所制备的合金的活化较慢,但放电比容量及循环性能得到提高.In this paper,the Co-free hydrogen storage alloy LaNixCu4.5-xMn0.3Al0.2 was prepared by rapid quenching, and charge-discharge properties of the alloy was investigated. The results showed that the alloy was CaCu5 single-phase structure; with the increase of copper content in the alloy, discharge capacity, the activation performance and discharge plateau of the alloy decreased, but its cycle performance improved significantly. When x=3.0, the overall charge-discharge performance of the alloy was better. Compared with the ingot process, the activation of the alloy prepared by rapid quenching was slower, but the discharge capacity and cycle performance were improved.

关 键 词：贮氢合金 无钴 金属氢化物电极 循环稳定性 

分 类 号：TG139.7[一般工业技术—材料科学与工程]