The nanocrystalline and amorphous CeMg12+100wt%Ni+ywt%TiF3(Y=0, 3, 5) alloy samples were synthesized by ball milling technology. The infulence of TiF3 on microstructure and electrochemical properties of milling alloys were investigated. The electrochemical performance of prepared alloy samples was studied through discharge capacity, cycle stability and electrochemical kinetic, meantime. By using electrochemical PCT (pressure-concentration-isotherm) curves the change law of electrochemical performance of ball-milled alloys was further explained from the view of thermodynamics. The result showed that TiF3 was helpful for enhancing the nanocrytstalline and glass forming ability of milled CeMg12+100wt%Ni+ywt%TiF3(Y=0, 3, 5) hydrogen storage alloys, improving the electrochemical and kinetic properties. On the other hand, in milling process, addition of TiF3 reduced the hot stability of alloy hydride to some degree, accelerating the electrochemical dehydriding reaction.%用球磨法制备具有非晶纳米晶结构的CeMg12+100wt％Ni+Ywt％TiF3(Y=0、3、5)电极合金,研究在球磨过程中加入不同含量的TiF3对合金的微观结构及电化学性能影响.主要从电化学放电容量、循环稳定性以及电化学动力学方面对制备的合金电化学性能进行探讨,并运用电化学PCT(压力-组成-温度)法从热力学角度进一步研究制备合金电化学性能变化的内在原因.结果表明:TiF3有助于增强球磨CeMg12+ 100wt％Ni+Ywt％TiF3(Y=0、3、5)储氢合金玻璃化形成能力,改善合金的电化学与动力学性能.另外,球磨过程中加入TiF3可以在一定程度上降低合金氢化物的热稳定性,有利于电化学释氢反应的进行.
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