Effect of La on the crystalline and electrochemical properties of Ti-Zr-Ni melt-spun alloys

Abstract

Ti 45 Zr 30 Ni 25 and Ti 45 Zr 30 Ni 25 La alloys were prepared by melt-spinning, and the phase structure and electrochemical performances of the melt-spun alloys were investigated. The results showed that the Ti 45 Zr 30 Ni 25 alloy was composed of the quasicrystalline phase, amorphous phase and Laves phase. The Ti 45 Zr 30 Ni 25 La alloy contained quasicrystalline and amorphous phases. The maximum discharge capacity was 111 mAh/g for the Ti 45 Zr 30 Ni 25 alloy electrode, and 124 mAh/g for the Ti 45 Zr 30 Ni 25 La alloy electrode. The Ti 45 Zr 30 Ni 25 La alloy electrode exhibited a better high-rate dischargeability and cycling stability than the Ti 45 Zr 30 Ni 25 alloy electrode. The improvement of electrochemical properties was mainly ascribed to the increase in the amorphous phase due to the addition of La.