论文信息 - MICROSTRUCTURE AND ELECTROCHEMICAL PERFORMANCE OF LaMgAlMnCoSnNi ALLOYS ALLOYS FOR NICKEL

MICROSTRUCTURE AND ELECTROCHEMICAL PERFORMANCE OF LaMgAlMnCoSnNi ALLOYS ALLOYS FOR NICKEL – METAL HYDRIDE BATTERIES

The effects of substitution of Sn for Co on the microstructure and electrochemical discharge capacity of La0.7Mg0.3Al0.3Mn0.4Co0.5-xSnxNi3.8 (x = 0.0, 0.2 and 0.5) alloys were investigated. Microstructure and phase composition of samples were investigated employing scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that all of alloys are mainly composed of LaNi5 and MgNi2 phases, but when increasing the content of Sn in alloys the LaNiSn phase appears. The electrochemical discharge capacity were investigated by charging and discharging the negative electrode alloys. Tests indicated that the maximum discharge capacity decrease from 337.1 mAh/g (x = 0.0) to 249.8 mAh/g (x = 0.5).

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