High-temperature electrochemical performance and phase composition of Ti_0.7Zr_0.5V_0.2Mn_1.8-xNi_x hydrogen storage electrode alloys

来源期刊：中国有色金属学报(英文版)2001年第3期

论文作者：徐艳辉 陈长聘 李寿权 应窕 王启东

文章页码：350 - 352

Key words：hydrogen storage electrode alloys； high temperature electrochemical performance； phase composition

Abstract: The rapid development of electric vehicles demands the development of high performance nickel-metal hydride battery that is able to endure high temperature. The discharge properties of Ti_0.7Zr_0.5V_0.2Mn_1.8-xNi_x(x =0.4, 0.8,1.1,1.4,1.7)hydrogen storage alloys was investigated and its phase composition was analyzed using X-ray diffraction. The results show that the cycling life was improved as the content of nickel increases. When x =0.4,0.8,1.1 and 1.4, the main phase is MgZn₂ type C14 Laves phase and the second one is cubic TiNi phase. When x=1.7, the Laves phase structure disappears. EDAS analysis shows that the increase of nickel content is effective in suppressing the dissolution of vanadium component in alloys.