| 新型镁基储氢合金的合成及电化学性能的研究 |
| |
| 引用本文： | 袁华堂,李秋荻,王一菁,宋赫男,冯艳.新型镁基储氢合金的合成及电化学性能的研究[J].高等学校化学学报,2002,23(4):517-520. |
| |
| 作者姓名： | 袁华堂 李秋荻 王一菁 宋赫男 冯艳 |
| |
| 作者单位： | 南开大学新能源材料化学研究所, 天津 300071 |
| |
| 基金项目： | 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． |
| |
| 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 |
| 文章编号： | 0251-0790(2002)04-0517-04 |
| 收稿时间： | 2001-08-20 |
Preparation and Electrochemical Characteristics of a New Type Mg-based Hydrogen Storage Alloys |
| |
| YUAN Hua-Tang,LI Qiu-Di,WANG Yi-Jing,SONG He-Nan,FENG Yan.Preparation and Electrochemical Characteristics of a New Type Mg-based Hydrogen Storage Alloys[J].Chemical Research In Chinese Universities,2002,23(4):517-520. |
| |
| Authors: | YUAN Hua-Tang LI Qiu-Di WANG Yi-Jing SONG He-Nan FENG Yan |
| |
| Institution: | Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China |
| |
| 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. A new 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 V addition and reaches the highest capacity of 333 mA.h.g-1 (50 mA.g-1:, -0. 5 V vs. Hg/HgO) without any treatment. The improvement of cycle life was ascribed to the partial substitution of Al for Mg in the alloy. |
| |
| Keywords: | Mg-based hydrogen storage alloys Electrode Electrochemical properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《高等学校化学学报》浏览原始摘要信息 |
| 点击此处可从《高等学校化学学报》下载免费的PDF全文 |
|
