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本文研究 Zr1-x Tix(Ni0 .6Mn0 .3 V0 .1Cr0 .0 5 ) 2 (x=0 ,0 .1 ,0 .2 ,0 .3 ,0 .4 ,0 .5)系 Laves相储氢电极合金的气态 P-C-T性能、晶体结构及电化学性能。XRD分析表明 ,Ti合金化使 Zr基储氢合金主相从 C1 5相转变为 C1 4相。当 x>0 .2时 ,第二相 Zr7Ni10 相消失 ,并出现 Ti Ni相。 Ti合金化使 Zr基储氢合金中 C1 5相和 C1 4相的晶格常数线性递减。气态 P-C-T测试表明 ,Ti合金化从 x=0增加至 x=0 .5时合金的吸放氢平台压力升高约 1 0倍 ,但降低了储氢合金的最大储氢容量。电化学测试表明 ,Ti合金化有利于改善 Zr基储氢合金的活化性能 ,这与 Ti在 KOH溶液中易于溶解有关 ,但过高的 Ti含量降低了合金电极的循环稳定性。Zr1-x Tix(Ni0 .6Mn0 .3 V0 .1Cr0 .0 5 ) 2 合金的电化学容量和高倍率放电性能均随合金中 Ti含量的增加先上升后下降 ,这与合金的相结构组成有很大关系。
In this paper, we study the hydrogen storage of Laves phase of Zr1-x Tix (Ni0.6Mn0.3V0.1Cr0.0.5) 2 (x = 0,0.1,0.2,0.3,0.4,0.5) Gaseous PCT Properties, Crystal Structure and Electrochemical Properties of Electrode Alloys. XRD analysis showed that Ti alloying changed the main phase of Zr-based hydrogen storage alloy from C1 5 phase to C1 4 phase. When x> 0 .2, the second phase Zr7Ni10 phase disappears, and Ti Ni phase appears. Ti alloying linearly decreases the lattice constants of C1 5 phase and C1 4 phase in Zr-based hydrogen storage alloys. The gaseous P-C-T test showed that the Ti-alloyed alloy increased the pressure of hydrogen absorption and desorption platform about 10 times from x = 0 to x = 0.5, but decreased the maximum hydrogen storage capacity of the hydrogen storage alloy. Electrochemical tests show that Ti alloying is helpful to improve the activation performance of Zr-based hydrogen storage alloys, which is related to the easy dissolution of Ti in KOH solution. However, too high Ti content reduces the cycle stability of the alloy electrode. The electrochemical capacity and high-rate discharge performance of Zr1-xTix (Ni0.6Mn0.3V0.1Cr0.0.5) 2 alloy firstly increase and then decrease with the increase of Ti content in the alloy, which is in agreement with the phase composition of the alloy Big relationship.