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首页> 外文会议>7th international green energy conference amp; 1st DNL conference on clean energy >PREPARATION AND HYDROGEN STORAGE KINETICS OF NANOCRYSTALLINE AND AMORPHOUS MG20NI8M2 (M=CO, NI) ALLOYS
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PREPARATION AND HYDROGEN STORAGE KINETICS OF NANOCRYSTALLINE AND AMORPHOUS MG20NI8M2 (M=CO, NI) ALLOYS

机译：纳米晶和非晶态MG20NI8M2（M = CO，NI）合金的制备及储氢动力学

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摘要

In order to obtain a nanocrystalline and amorphous structure in the Mg2Ni-type alloy, the melt spinning technology has been used to prepare the Mg20Ni8M2 (M=Co, Cu) hydrogen storage alloys. The microstructures of the alloys were characterized by XRD, SEM and HRTEM. The effects of the melt spinning on the gaseous and electrochemical hydrogen storage kinetics of the alloys were investigated. The results indicate that the as-spun (M=Co) alloys display a nanocrystalline and amorphous structure as spinning rate grows to 20 m/s, while the as-spun (M=Cu) alloys hold an entire nanocrystalline structure even if a limited spinning rate is applied, suggesting that the substitution of Co for Ni facilitates the glass formation in the Mg2Ni-type alloy. The melt spinning remarkably ameliorates the gaseous hydriding and dehydriding kinetics of the alloys. As the spinning rate is raised from 0 (As-cast was defined as the spinning rate of 0 m/s) to 30 m/s, the hydrogen absorption saturation ratio ( ), a ratio of the hydrogen absorption capacity in 5 min to the saturated hydrogen absorption capacity, are enhanced from 80.43% to 94.38% for the (M=Co) alloy and from 56.72% to 92.74% for the (M=Cu) alloy. The hydrogen desorption ratio ( ), a ratio of the hydrogen desorption capacity in 20 min to the saturated hydrogen absorption capacity of the alloy, are increased from 24.52% to 51.67% for the (M=Co) alloy and from14.89% to 40.37% for the (M=Cu) alloy. Furthermore, the high rate discharge ability (HRD), the limiting current density (IL) and the hydrogen diffusion coefficient (D) of the alloys notably mount up with the growing of the spinning rate.
机译：为了在Mg2Ni型合金中获得纳米晶和非晶态结构，已使用熔体纺丝技术制备Mg20Ni8M2（M = Co，Cu）储氢合金。用XRD，SEM和HRTEM对合金的微观结构进行了表征。研究了熔体纺丝对合金的气态和电化学储氢动力学的影响。结果表明，随着纺丝速度提高到20 m / s，初生（M = Co）合金显示出纳米晶体和非晶态结构，而即使有限，初生（M = Cu）合金仍具有完整的纳米晶体结构。应用旋转速率，表明用Co代替Ni有助于Mg2Ni型合金中的玻璃形成。熔体纺丝显着改善了合金的气态氢化和脱水动力学。随着纺丝速率从0（铸态定义为0 m / s的纺丝速率）提高到30 m / s，氢吸收饱和比（），5分钟内氢吸收能力与（M = Co）合金的饱和氢吸收能力从80.43％提高到94.38％，（M = Cu）合金的饱和氢吸收能力从56.72％提高到92.74％。氢的脱附率（）（20分钟内的氢脱附能力与合金的饱和氢吸收能力之比）对于（M = Co）合金从24.52％增加到51.67％，从14.89％增加到40.37 （M ＝ Cu）合金的％。此外，随着旋转速度的提高，合金的高倍率放电能力（HRD），极限电流密度（IL）和氢扩散系数（D）显着增加。

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  • 会议地点 Dalian(CN)
  • 作者

    Yang-huan Zhang; Zhong-hui Hou; Guo-fang Zhang; Xiao-gang Liu; Le-le Chen; Dong-liang Zhao;

  • 作者单位

    Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081,China Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010,China;

    ElectedState Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010,China;

    Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081,China Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010,China;

    Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081,China Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010,China;

    Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081,China Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010,China;

    Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081,China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 清洁能源（无污染能源）的研究;
  • 关键词

    Mg2Ni-type alloy; Nanocrystalline and amorphous; Preparation; Hydrogen storage kinetics;

    机译：Mg2Ni型合金；纳米晶体和无定形；制备;储氢动力学;

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