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首页> 外文期刊>Electrochimica Acta >Study on phase structure and electrochemical properties of Ml{sub}(1-x)Mg{sub}xNi{sub}2.80Co{sub}0.50Mn{sub}0.10Al{sub}0.10 (x = 0.08, 0.12, 0.20, 0.24, 0.28) hydrogen storage alloys
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Study on phase structure and electrochemical properties of Ml{sub}(1-x)Mg{sub}xNi{sub}2.80Co{sub}0.50Mn{sub}0.10Al{sub}0.10 (x = 0.08, 0.12, 0.20, 0.24, 0.28) hydrogen storage alloys

机译：Ml {sub}（1-x）Mg {sub} xNi {sub} 2.80Co {sub} 0.50Mn {sub} 0.10Al {sub} 0.10的相结构和电化学性能的研究（x = 0.08，0.12，0.20， 0.24、0.28）储氢合金

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摘要

Phase structure and electrochemical properties of the Ml{sub}(1-x)Mg{sub}xNi{sub}2.80Co{sub}0.50Mn{sub}0.10Al{sub}0.10(x = 0.08, 0.12, 0.20, 0.24, 0.28) (Ml = La-rich mixed lanthanide) alloys were studied. X-ray diffraction (XRD) analysis and Rietveld refinement show that the alloys consist mainly of LaNi{sub}5 and (La,Mg)Ni{sub}3 phase. Due to variation in phases of the alloys, the maximum discharge capacity, the high rate dischargeability (HRD), and the low temperature dischargeability increase first and then decrease. The maximum discharge capacity increases from 322mAh g{sup}(-1) (x=0.08) to 375mAh g{sup}(-1) (x = 0.12), and then decreases to 351mAh g{sup}(-1) (x=0.28) with increasing x. As the case of x = 0.20, HRD at 1200mA g{sup}(-1) and discharge capacity at 233 K reaches 41.7% and 256 mAh g{sup}(-1), respectively. The cycling stability is improved by substituting La with Ml and B-site multi-alloying, and the capacity retention of Ml{sub}0.72Mg{sub}0.28Ni{sub}2.80Co{sub}0.50Mn{sub}0.10Al{sub}0.10 at the 200th cycle is 71%.
机译：Ml {sub}（1-x）Mg {sub} xNi {sub} 2.80Co {sub} 0.50Mn {sub} 0.10Al {sub} 0.10（x = 0.08，0.12，0.20，0.24）的相结构和电化学性能，0.28）（M1 ＝富La的混合镧系元素）合金被研究。 X射线衍射（XRD）分析和Rietveld精炼表明，合金主要由LaNi {sub} 5和（La，Mg）Ni {sub} 3相组成。由于合金相的变化，最大放电容量，高倍率放电率（HRD）和低温放电率先升高然后降低。最大放电容量从322mAh g {sup}（-1）（x = 0.08）增加到375mAh g {sup}（-1）（x = 0.12），然后降至351mAh g {sup}（-1）（ x = 0.28）随着x的增加。在x = 0.20的情况下，在1200mA g {sup}（-1）时的HRD和在233 K下的放电容量分别达到41.7％和256 mAh g {sup}（-1）。通过用M1和B位多合金取代La可以改善循环稳定性，并保持Ml {sub} 0.72Mg {sub} 0.28Ni {sub} 2.80Co {sub} 0.50Mn {sub} 0.10Al { sub}在第200个周期的0.10为71％。

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