Electrode properties and phase composition of Ti0.5Ni0.25Al0.25
hydrogen storage alloys and theoretical simulation
hydrogen storage alloys and theoretical simulation
(1. Institute of Electrochemical Power Sources, Soochow University, Suzhou 215006 China;
2. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China)
2. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: Ti0.5Al0.25Ni0.25 alloy prepared by vacuum induction melting was studied. The phase composition was analyzed with X-ray technique and EDS analysis, and its electrochemical properties were investigated at various temperatures. Electrochemical reaction kinetic parameters were also studied with proper electrochemical techniques. The influence of the secondary corrosion reaction on the anodic linear polarization measurement was also analyzed by theoretical simulation. The results show that, proper ball-milling with nickel powders is beneficial to electrochemical performance. The theoretical simulation proves that, the existence of the side reaction can disturb the measurement of electrochemical reaction kinetic parameters.
Key words: hydrogen storage alloy; electrochemical kinetics; metal hydride electrode; theoretical simulation