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用机械合金化法合成了Mg0·9Ti0·1Ni0·9X0·1(X=Mn,Zn,Co,Fe)系列合金.X射线衍射(XRD)结构分析表明,用X部分替代Ni后,促进了Mg0·9Ti0·1Ni合金的非晶化过程.用Co和Fe部分替代Ni提高了合金的放电容量,但却降低了合金的循环稳定性.用Zn和Mn部分替代Ni提高了合金电极的循环寿命,尤其是Mg0·9Ti0·1Ni0·9Zn0·1合金电极经10个充放电循环后,其放电容量仍可达到313·8mA·h/g.对添加Co后的合金进行p-c-T测试发现,Mg0·9Ti0·1Ni0·9Co0·1合金的吸放氢容量明显比Mg0·9Ti0·1Ni合金高,这与电化学所测到的结果一致.
The alloy Mg0.9Ti0.1Ni0.9X0.1 (X = Mn, Zn, Co, Fe) was synthesized by mechanical alloying.The structure of the alloy was characterized by X-ray diffraction (XRD) · Amorphous process of 9Ti0.1Ni alloy.Co and Fe partially replace Ni to improve the discharge capacity of the alloy, but reduce the cycle stability of the alloy.With Zn and Mn partially replace Ni to improve the cycle life of the alloy electrode, In particular, the discharge capacity of the Mg0.9Ti0.1Ni0.9Zn0.1 alloy electrode can reach 313.8mAh / g after 10 cycles of charge-discharge cycles.The results of pcT test for the alloy after addition of Co show that Mg0.9Ti0.1 The capacity of hydrogen storage and desorption of 1Ni0.9Co0.1 alloy is obviously higher than that of Mg0.9Ti0.1Ni alloy, which is in agreement with the result of electrochemistry.