V对贮氢合金微观结构和电化学性能的影响

Effects of V on Microstructure and Electrochemical Properties Hydrogen Storage Alloys

摘要:

为了开发AB5型稀土系低Co贮氢合金，研究了加V低Co贮氢合金M／Ni3．55Co0.3Mn0.4Al0．25Cu0．15Fe0.1Cr0.1Zn0.13Vx（x=0．02，0．05，0．08）V含量变化对放电容量、循环稳定性的影响机理。结果表明，加V低钴贮氢合金可以获得良好的综合电化学性能，但V的加入应严格控制。在本研究范围内，x=0．02的加V低钴贮氢合金具有最佳的综合电化学性能。

Abstract:

In order to develop the AB5-type hydrogen storage alloys with multi-component alloying elements, the alloys MlNi3.55Co0.3Mn0.4Al0.25Cu0.15Fe0.1Cr0.1Zn0.13Vx(x=0.02, 0.05, 0.08) were prepared, and their discharge capacity, cycle stability were tested and analyzed. The results show that the low-Co content hydrogen storage alloys with additive V has good electrochemical properties. It is found that the electrochemical properties of low-Co content hydrogen storage alloys with x=0.02 are better than those of the other alloys. The effect of V on the electrochemical properties is related to the change of the microstructures of the alloys.