中国稀土学报(英文版)
中國稀土學報(英文版)
중국희토학보(영문판)
JOURNAL OF RARE EARTHS
2001年
1期
29-33
,共5页
王志兴%李新海%陈启元%郭华军%彭文杰%郭炳昆
王誌興%李新海%陳啟元%郭華軍%彭文傑%郭炳昆
왕지흥%리신해%진계원%곽화군%팽문걸%곽병곤
The effects of some substituting elements on the specific discharge capacity, activation and cycling life of AB5 non-stoichiometric hydrogen absorbing alloys were studied electrochemically. Results show that the characteristics of hydrogen absorbing alloys under low current density are greatly improved through the substitution of Ni by Sn, Co, and Mn. Three hydrogen storage alloys, i.e., La(NiSn)5.14, La(NiSnCo)5.12 and La(NiSnMn)5.12 have the higher specific capacity and easy activation. However, Al in the alloy shows the opposite effect on the electrochemical properties. Under high current density, the discharge capacity and potential of La(NiSn)5.14 is superior to La(NiSnCo)5.12 and La(NiSnMn)5.12, but the cycling life of La(NiSn)5.14 is very short. The addition of Mn, Co and Al to the alloys improves the cycling characteristics. In all these alloys, La(NiSnCo)5.12 is considered as an ideal hydrogen storage alloy.
