低钴稀土系贮氢合金的研究

通过在稀土系贮氢合金中添加不同含量的Fe或Cu元素,部分替代合金中Co的方法,研究低钴贮氢合金电化学性能上的差异.结果表明:由于合金组成和化学计量比的不同,同样是添加了Fe或Cu的合金在电化学性能上表现不同,但总体说,含Cu低钴贮氢合金容量和倍率放电性能较好,含Fe低钴贮氢合金有较好的循环稳定性,过化学计量比的合金循环稳定性要好于欠化学计量比的合金.

Studies on low Co rare earth-based hydrogen storage alloys

through adding different content of Fe or Cu into rare earth - based hydrogen storage alloy to partly substitute for Co in it, the difference of electrochemical properties in low Co hydrogen storage alloys is studied in this paper. The results show that owing to the difference of alloys stoichiometric composition, the electrochemical properties of alloys added with Fe or Cu are also different. Generally speaking, discharging capacity and rate capacity of the Cu - contained low Co hydrogen storage alloy is good. The Fe - contained low Co hydrogen storage alloy shows good cycling stability. Cycling stability with exceeding - stoichiometric is better than that with lacking - stoichiometric.