Microstructure and Electrode Characteristics of Ti-V-Cu-Cr-Ni Metal Hydride Electrode Alloy

Yu Qing Qiao; Min Shou Zhao; Li Min Wang

doi:10.4028/www.scientific.net/AMR.512-515.1933

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Microstructure and Electrode Characteristics of Ti-V-Cu-Cr-Ni Metal Hydride Electrode Alloy
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 512-515Microstructure and Electrode Characteristics of...

Microstructure and Electrode Characteristics of Ti-V-Cu-Cr-Ni Metal Hydride Electrode Alloy

Abstract:

Microstructure and electrode characteristics of Ti-V-Cu-Cr-Ni metal hydride electrode alloy have been investigated by XRD, FESEM-EDS and EIS measurements. The result shows that the alloy is mainly composed of V-based solid solution phase with body-centered-cubic structure and TiNi-based secondary phase. The discharge capacity increases with increasing temperature in a wider temperature region from 303 K to 343 K. The result of electrochemical impedance spectrometry indicates that the charge transfer resistance decreases with increasing temperature, while the exchange current density in the bulk of the alloy increase with increasing temperature.