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首页> 外文期刊>RSC Advances >Enhanced hydrogen storage properties of 1.1MgH(2)-2LiNH(2)-0.1LiBH(4) system with LaNi5-based alloy hydrides addition
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Enhanced hydrogen storage properties of 1.1MgH(2)-2LiNH(2)-0.1LiBH(4) system with LaNi5-based alloy hydrides addition

机译：增强氢气储存性能为1.1mg（2）-2LLIBH（2）-0.1Libh（4）系统，具有LANI5基合金氢化物的加入

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摘要

Significant improvements in the hydrogen sorption properties of the Li-Mg-N-H system have been achieved by adding a small amount of LiBH4. Herein, the hydrogen storage properties of the 1.1MgH(2)-2LiNH(2)-0.1LiBH(4) system are further enhanced by addition of LaNi5-based (LaNi3.8Al0.75Mn0.45, LaNi4.5Mn0.5, LaNi4Co) alloy hydrides. The refinement of the Li-Mg-B-N-H particles and the metathesis reaction are facilitated by adding LaNi5-based alloy hydrides during the ball milling process. The addition of LaNi5-based alloy hydrides can enhance the hydrogen sorption kinetics, reduce the dehydrogenation temperature and promote a more thorough dehydrogenation of the Li-Mg-B-N-H system. The LaNi5-based alloy hydrides are involved in hydrogen de/hydrogenation reaction. Among the three alloys, LaNi4.5Mn0.5 makes the most obvious improvement on the reaction kinetics, and the dehydrogenation peak temperature is reduced by 12 degrees C, while the activation energy is reduced by 11% with 10 wt% LaNi4.5Mn0.5 addition. The weakening of the N-H bond and the homogeneous distribution of the LaNi5-based alloy hydrides in the Li-Mg-B-N-H composite have important roles in the reduction of the desorption barrier and the kinetics enhancement.
机译：通过加入少量LiBH4，已经实现了Li-Mg-N-H系统的氢吸收性能的显着改善。在此，通过添加基于LANI5（LANI3.8AL0.75MN0.45，LANI4.5MN0.5，LANI4CO，进一步增强了1.1mGH（2）-2勒米（2）-0.1丙杆（4）系统的储氢性能。 ）合金氢化物。通过在球磨过程中加入Lani5基合金氢化物，促进了Li-Mg-B-N-H颗粒的细化和复分解反应。加入Lani5基合金氢化物可以增强氢吸入动力学，降低脱氢温度并促进Li-Mg-B-N-H系统的更彻底的脱氢。 Lani5基合金氢化物参与氢DE /氢化反应。在三种合金中，LANI4.5MN0.5对反应动力学进行了最明显的改善，脱氢峰值温度降低12℃，而活化能量减少11％，10wt％lani4.5mn0.5减少11％添加。 N-H键的弱化和Lani5基合金氢化物在Li-Mg-B-N-H复合材料中的均匀分布在解吸屏障和动力学增强中具有重要作用。

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  • 来源
    《RSC Advances》 |2018年第71期|共8页
  • 作者

    Zhao Wang; Wu Yuanfang; Li Ping; Jiang Lijun; Qu Xuanhui;

  • 作者单位

    Univ Sci &

    Technol Beijing Inst Adv Mat &

    Technol Beijing 100083 Peoples R China;

    GRIMAT Engn Inst Co Ltd Inst Energy Mat &

    Technol Beijing 101407 Peoples R China;

    Univ Sci &

    Technol Beijing Inst Adv Mat &

    Technol Beijing 100083 Peoples R China;

    GRIMAT Engn Inst Co Ltd Inst Energy Mat &

    Technol Beijing 101407 Peoples R China;

    Univ Sci &

    Technol Beijing Inst Adv Mat &

    Technol Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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