Microstructure and Electrochemical Hydrogen Storage Characteristics of CeMg_(12)+100wt%Ni +Ywt%TiF_3(Y=0,3,5) Alloys Prepared by Ball Milling

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–concentrationisotherm) 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.