The Influence of Chemical Modification by Silver on Hydrogen Storage Properties of Nanocrystalline Ti2Ni Alloy

摘要

In this study mechanical alloying process with subsequent annealing at 750 degrees C for 0.5 h were used to produce Ti2Ni-based nanocrystalline alloys and composite. To improve electrochemical properties, Ti-Ni-based alloy was chemically modified by 5 wt% of silver powder. X-ray diffraction analyses showed formation of nanocrystalline Ti2Ni main phase. Electrochemical studies revealed a positive effect of chemical modification by silver on Ti2Ni alloy. All synthesized materials were used as negative electrodes for Ni-MHz batteries. The highest discharge capacity equaled 303 mAh/g, at 40 mA/g discharge current. All electrochemical measurements were done in 6 M KOH solution.