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用机械合金化法成功制备出MgNi和TiNi0.5Mn0.5合金,并将不同质量的TiNi0.5Mn0.5与MgNi合金球磨复合10 h制备MgNi-x%TiNi0.5Mn0.5(x=10,30,50)合金.XRD结果表明球磨后几种合金均为非晶体,TiNi0.5Mn0.5均匀分散到MgNi合金主相中;充放电结果表明MgNi-TiNi0.5Mn0.5复合合金的初始容量比纯MgNi合金(443.12 mAh/g)低,MgNi-10%TiNi0.5Mn0.5首次放电容量是394.46 mAh/g,但循环寿命有较大的改善,50次循环后容量保持在232.57 mAh/g,保持率达59%;动电位扫描结果表明复合后合金电极抗腐蚀能力提高;循环伏安法和电化学阻抗谱法研究结果表明:复合后电极表面的电化学催化性能增强,H原子在合金电极内部的扩散阻抗减小.
MgNi and TiNi0.5Mn0.5 alloys were successfully prepared by mechanical alloying method and MgNi-x% TiNi0.5Mn0.5 (x = 10, 30, 30) was prepared by ball milling with different mass of TiNi0.5Mn0.5 and MgNi alloy for 10 h. , 50) XRD results show that after milling all the several alloys are amorphous, TiNi0.5Mn0.5 uniformly dispersed into the main phase of MgNi alloy; charge and discharge results show that the initial capacity of MgNi-TiNi0.5Mn0.5 composite alloy than the pure The initial discharge capacity of MgNi-10% TiNi0.5Mn0.5 is 394.46 mAh / g, but the cycle life is greatly improved. The capacity remains at 232.57 mAh / g after 50 cycles The results of cyclic voltammetry and electrochemical impedance spectroscopy showed that the electrochemical catalytic performance of the composite electrode surface was enhanced, and the H atom in the alloy electrode The diffusion resistance decreases.