B、SG及MG的添加对Mg-Al合金储氢性能的影响

doi:10.11901/1005.3093.2016.739

材料研究学报

2017, Vol. 31

Issue (12): 931-938 DOI: 10.11901/1005.3093.2016.739

研究论文

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B、SG及MG的添加对Mg-Al合金储氢性能的影响

黄显吞(

), 卿培林, 石伟和

百色学院材料科学与工程学院百色 533000

Influence of Boron, Single-layer Graphene and Multi-layer Graphene on Hydrogen Storage Property of Mg-Al Alloy

Xiantun HUANG(

), Peilin QING, Weihe SHI

Department of Materials Science and Engineering, Baise College, Baise 533000, China

引用本文:

黄显吞, 卿培林, 石伟和. B、SG及MG的添加对Mg-Al合金储氢性能的影响[J]. 材料研究学报, 2017, 31(12): 931-938.
Xiantun HUANG, Peilin QING, Weihe SHI. Influence of Boron, Single-layer Graphene and Multi-layer Graphene on Hydrogen Storage Property of Mg-Al Alloy[J]. Chinese Journal of Materials Research, 2017, 31(12): 931-938.

全文: PDF(2843 KB) HTML

摘要:

在氩气保护下,采用机械合金化制备Mg-Al合金,并研究二维结构材料B、SG及MG的添加对Mg-Al合金储氢性能的影响。试验结果显示,合金材料主要由Mg₁₇Al₁₂相组成,在碳素材料的催化作用下,Mg-Al合金的综合储氢性能得到明显提高。Mg-Al合金的初始放氢温度为575 K,添加SG或MG后合金材料的初始放氢温度分别降低了64 K和82 K,脱氢峰值温度也分别降低了76 K和74 K,而Mg-Al合金材料放氢过程的表观活化能则从328.9 kJ/mol分别下降到231.5 kJ/mol和211.9 kJ/mol。

关键词 ：金属材料, Mg-Al合金, 机械合金化, 碳素材料, 储氢性能

Abstract：

Mg-Al alloy was prepared via mechanical alloying under hydrogen atmosphere protection, and then the influence of doping substance such as: boron (B), single-layer graphene (SG) and multi-layer graphene (MG) (in 5%, mass fraction) respectively on the hydrogen storage property of Mg-Al alloy was investigated systematically. The results show that the prepared alloy is mainly composed of Mg₁₇Al₁₂, while the hydrogen storage performance for the Mg-Al alloy is improved obviously by doping graphene SG and MG respectively. The initial desorption temperature for Mg-Al-5 (SG and MG) alloy is 64 K and 82 K lower than that of the plain Mg-Al alloy (575 K), and correspondingly their dehydrogenation peak temperature was 76 K and 74 K lower. Besides, with the incorporation of SG and MG, the apparent activation energy of the Mg-Al alloy decreases from 328.9 kJ/mol to 231.5 kJ/mol and 289.4 kJ/mol respectively.

Key words： metallic materials Mg-Al alloy mechanical alloying carbon materials hydrogen storage property

收稿日期: 2016-12-20

ZTFLH:

TG139

基金资助:广西自然科学基金(2014GXNSFAA118346),广西高校重点学科:材料物理与化学(百色学院)[KS16ZD06]

作者简介:

作者简介黄显吞,男,1969年生,硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.739 或 https://www.cjmr.org/CN/Y2017/V31/I12/931

图1 Mg-Al-x(x=0, B, SG, MG)合金样品球磨50 h后的SEM图

图2 Mg-Al-x(x=0, B, SG, MG)合金样品球磨及吸/放氢后的XRD图

图3 Mg-Al-x(x=0, B, SG, MG)合金材料变温吸/放氢曲线

图4 Mg-Al-x(x=0, B, SG, MG)合金材料在573 K温度下的吸/放氢动力学曲线

图5 Mg-Al-MG合金材料在523 K、573 K以及623 K温度下的吸氢动力学曲线

图6 Mg-Al-MG合金材料在吸氢过程的ln[-ln(1-α)]和lnt关系曲线

图7 Mg-Al-MG合金材料在吸氢过程的(1000/RT)-lnk曲线

图8 Mg-Al-x(x=0, B, SG, MG)合金材料的DTA曲线

图9 Mg-Al-x(x=0, B, SG, MG)合金材料Kissinger方程曲线

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