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The phase structure and electrochemical properties of TiV 2.1 Ni 0.4 Zr 0.06 Cu 0.03 Cr 0.1  alloys as anode materials for nickel-metal-hydride batteries treated at different temperatures were investigated. The alloys mainly consist of a bcc (V,Ti)H 0.81  main phase and a network structure of hcp C14 laves phase, along the grain boundaries of the main phase. The lattice distortion is induced to a large extent for the sample treated at 1123 K. The electrochemical measurements indicate that the maximum discharge capacity of this sample is decreased, but improved cycling stability and high-rate dischargeability (HRD) are achieved. The deterioration behavior of the HRD for Ti-V-based alloys is discussed in the paper.

zeitschrift für physikalische chemie

The Effect of Heat Treatments and Degradation Behavior of High-Rate Dischargeability in Ti-V-based Alloys as Anode Materials for Nickel-Metal-Hydride Batteries