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| 纳米晶与非晶Mm(NiCoMnAl)_5结构及氢扩散系数研究 | |
| 引用本文： | 肖勇,刘应亮,袁定胜,肖方明,唐仁衡,王英.纳米晶与非晶Mm(NiCoMnAl)_5结构及氢扩散系数研究[J].暨南大学学报,2009,30(1). |
| 作者姓名： | 肖勇 刘应亮 袁定胜 肖方明 唐仁衡 王英 |
| 作者单位： | 1. 广东省金属材料公共实验室,广东,广州,510651;暨南大学化学系,广东,广州,510632 2. 暨南大学化学系,广东,广州,510632 3. 广东省金属材料公共实验室,广东,广州,510651 |
| 基金项目： | 广东省金属材料公共实验室开放课题 |
| 摘 要： | 通过循环伏安法测定了纳米晶态与非晶态Mm(NiCoMnAl),贮氢合金电极中的氢扩散系数,并利用XRD、TEM和SAED对贮氢合金进行了结构表征.结果表明:纳米晶合金比非晶合金具有更高的结晶度和细小的晶粒尺寸,大量的晶界为氢原子提供了良好的扩散通道,有利于氢在合金中的扩散,提高了合金电极中氢的扩散系数. |
| 关 键 词： | 纳米晶态 贮氢合金 氢扩散系数 循环伏安法 |
Determination of the hydrogen diffusion coefficient in nanocrystalline and non-crystalline Mm(NiCoMnAl)_5 by cyclic voltammetry |
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| XIAO Yong,LIU Ying-liang,YUAN Ding-sheng,XIAO Fang-ming,TANG Ren-heng,WANG Ying.Determination of the hydrogen diffusion coefficient in nanocrystalline and non-crystalline Mm(NiCoMnAl)_5 by cyclic voltammetry[J].Journal of Jinan University(Natural Science & Medicine Edition),2009,30(1). | |
| Authors: | XIAO Yong LIU Ying-liang YUAN Ding-sheng XIAO Fang-ming TANG Ren-heng WANG Ying |
| Institution: | 1.Public Laboratory of Guangdong Province for Metallic Materials;Guangzhou 510651;China;2.Department of Chemistry;Jinan University;Guangzhou 510632;China |
| Abstract: | Cyclic voltammetry was used to determine the hydrogen diffusion coefficient in the electrode with nanocrystalline and non-crystalline rare earth hydrogen storage alloy.The XRD,TEM and SAED were used to character for the structure of the hydrogen storage alloy.The results show that the nanocrystalline has high degree of crystallinity and small crystal particle size,a large number of grain boundary provide a good spread channel for hydrogen atoms,the ability of hydrogen diffusion is improved and the diffusion... |
| Keywords: | nanocrystalline hydrogen storage alloy hydrogen diffusion coefficient cyclic voltammetry |
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