Abstract
Ti 44Zr 32Ni 22Cu 2 and Ti 41Zr 29Ni 28Cu 2 alloys were prepared by the melt-spinning method. The phase structure was analyzed by X-ray diffraction, and the electrochemical performances of the melt-spun alloys were investigated. The results indicated that the Ti 44Zr 32Ni 22Cu 2 alloy was composed of the icosahedral quasicrystals and amorphous phases, and the Ti 41Zr 29Ni 28Cu 2 alloy comprised icosahedral quasicrystals, amorphous, and Laves phases. The maximum discharge capacity was 141 mAh/g for the Ti 44Zr 32Ni 22Cu 2 alloy and 181 mAh/g for the Ti 41Zr 29Ni 28Cu 2 alloy, respectively. The Ti 41Zr 29Ni 28Cu 2 alloy also showed a better high-rate dischargeability and cycling stability. The better electrochemical properties should be ascribed to the high content of Ni, which was beneficial to the electrochemical kinetic properties and made the alloy more resistant to oxidation, as well as to the Laves phase in the Ti 41Zr 29Ni 28Cu 2 alloy, which could work as the electro-catalyst and the micro-current collector.
Published Version
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