Study On The Hydrogen-storage Electrode Of The Ti-based Quasicrystalline Alloys

This thesis showed the summary of the discovery, development, performance and application of Ti-based quasicrystal. and then studied on the capability of electrochemical hydrogen storage as the negative electrode in Ni/MH batteries. The outcome indicated the discharge capability of Tij4Vo.6Ni up to360mAh/g at60℃based on milling and annealing disposal, and that the performance on self-discharge and high-rate discharge had improved. We added ZrV2into the quasicrystal materials. Ti1.4V0.6Ni, milling to compound. With the added amount of ZrV2. the electrochemical hydrogen storage capacity of the composite materials increased. The maximum discharge capacity of the complexes was up to670mAh/g when the added amount was40%. But its cycle stability was weakened. Moreover, we chose a V-based solid solution alloy. V18Ti15Zr18Ni29Cr5Co7Mn with better stability, to dope in Ti1.4V0.6Ni quasicrystals. The multi-phases materials showed better performance in the maximum discharge capacity, cycle stability and high-rate discharge.