Electrochemical and kinetic properties of Ti 41.5 Zr 41.5 Ni 17 quasicrystal and LiH composite materials

Abstract We report the effect of LiH on the discharge performance of electrodes which are consist of Ti 41.5 Zr 41.5 Ni 17 quasicrystal in this paper. The Ti 41.5 Zr 41.5 Ni 17 alloy ribbons are prepared by arc-melting and melt spinning technique subsequently. The final product of Ti 41.5 Zr 41.5 Ni 17 and LiH composite materials is produced by mechanical alloying (MA) for 20 min, and it is investigated by a three-electrode cell at room temperature. The maximum discharge capacity can achieve 146.6 mAh/g around for Ti 41.5 Zr 41.5 Ni 17 and LiH composite materials electrode at the first discharge process, which is higher than 96.5 mAh/g of Ti 41.5 Zr 41.5 Ni 17 quasicrystal at the third discharge process. High-rate dischargeability and cycling stability are improved by adding LiH, which may attribute to the reversible reaction of LiH that enhances the electrochemical reaction activity in the process of electrochemical reaction. The discharge process is also characterized by electrochemical impedance spectroscopy.