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- W3139604734 endingPage "159826" @default.
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- W3139604734 abstract "To elucidate the effect of Mg substitution on the electrochemical properties of LaY2Ni9 alloys and its thermodynamic mechanisms, the cyclic stability, maximum discharge capacity (MDC), microstructure evolution, hydrogen induced amorphization (HIA), pulverization, formation energy, and amorphization formation criteria of LaY2-xMgxNi9 (x = 0, 0.25, 0.50, 0.75, and 1.00) alloys are investigated. The calculated formation energy indicates that Mg substitution destabilizes LaY2Ni9 phases and is responsible for decrement of phase fraction of LaY2Ni9 phases. The consumption of LaY2Ni9 phase and the generation of (La, Y)2Ni7 phase improve the cyclic stability by inhibiting the pulverization but reduce the MDC of the alloys. The amorphization formation criterion demonstrates that Mg substitution inhibits the HIA as verified by transmission electron microscopy results, which benefits both the MDC and cyclic stability of the alloys. The LaY1.25Mg0.75Ni9 alloy exhibits good overall electrochemical properties with the MDC of 308.4 mAh/g and capacity retention after 100 cycles of 69.0%." @default.
- W3139604734 created "2021-04-13" @default.
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- W3139604734 date "2021-08-01" @default.
- W3139604734 modified "2023-09-26" @default.
- W3139604734 title "Inhibition mechanism of capacity degradation in Mg-substituted LaY2-Mg Ni9 hydrogen storage alloys" @default.
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- W3139604734 doi "https://doi.org/10.1016/j.jallcom.2021.159826" @default.
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