高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (4): 517.

• 研究论文 •    下一篇

新型镁基储氢合金的合成及电化学性能的研究

袁华堂, 李秋荻, 王一菁, 宋赫男, 冯艳   

  1. 南开大学新能源材料化学研究所, 天津 300071
  • 收稿日期:2001-08-20 出版日期:2002-04-24 发布日期:2002-04-24
  • 通讯作者: 袁华堂(1946年出生),男,教授,博士生导师,主要从事材料化学研究.
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G2000026405);"八六三"计划(批准号:2001AA515022)和天津市自然科学基金(批准号:013603211)资助.

Preparation and Electrochemical Characteristics ofa New Type Mg-based Hydrogen Storage Alloys

YUAN Hua-Tang, LI Qiu-Di, WANG Yi-Jing, SONG He-Nan, FENG Yan   

  1. Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-08-20 Online:2002-04-24 Published:2002-04-24

PDF (PC)

被引次数

44

摘要： 用扩散法成功地合成了Mg1.5Al0.5-xNiVx(x=0,0.1,0.2,0.3,0.4)系列合金。XRD结构分析表明,合金中出现一个新的物相,其化学式为Mg3AlNi2,属立方晶系,Fd3m空间群,新相具有很好的电化学性能。钒的添加使合金的容量进一步提高。未经任何预处理的Mg1.5Al0.3V0.2Ni合金的最大放电容量达到333mA·h·g-1(50mA·g-1,-0.5Vvs.Hg/HgO).Al对六方晶系Mg2Ni合金结构中Mg的部分取代对于延长合金的循环寿命有重要作用。

关键词: 镁基储氢合金, 电极, 电化学性质

Abstract: The Mg-based hydrogen storage alloys Mg1.5Al0.5-xNiVx(x= 0, 0.1, 0.2, 0.3,0.4) were successfully synthesized by means of a diffusion method (MD).The structure of these alloys were examined by X-ray diffraction.Anew phase was found in the alloys.Its chemical formula is Mg3AlNi2.Further studies reveal that the new phase has excellent electrochemical properties.The discharge capacity of Mg1.5Al0.5-xNiVx alloys increases owing to Vaddition and reaches the highest capacity of 333 mA·h·g-1 (50 mA·g-1, -0.5 Vvs.Hg/HgO) without any treatment.The improvement of cycle life was ascribed to the partial substitution of Al for Mg in the alloy.

Key words: Mg-based hydrogen storage alloys, Electrode, Electrochemical properties

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