| 保压时间对储氢合金电极电化学性能的影响 |
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| 引用本文： | 田晓,刘向东,姚占全,海山.保压时间对储氢合金电极电化学性能的影响[J].稀有金属材料与工程,2012,41(5). |
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| 作者姓名： | 田晓 刘向东 姚占全 海山 |
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| 作者单位： | 内蒙古师范大学物理与电子信息学院功能材料物理与化学自治区重点实验室,内蒙古工业大学材料科学与工程学院,内蒙古农业大学水利与土木建筑工程学院,内蒙古师范大学 物理与电子信息学院 功能材料物理与化学自治区重点实验室 |
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| 基金项目： | 内蒙古自治区自然科学基金资助（项目号2010MS0804）；内蒙古师范大学科研基金资助（项目号ZRYB09007） |
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| 摘 要： | 在不同保压时间下制备了Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3储氢合金电极，研究了保压时间对合金电极的活化性能、最大放电容量、放电特性和循环稳定性的影响规律和机制。结果表明，保压时间对合金电极的活化性能基本无影响，而合金电极的其他电化学性能随着保压时间的增大均呈现出先变好后变坏的变化规律，保压时间为15min时，合金展示了最佳的综合电化学性能，电化学性能的改善主要归因于合金电极的电荷转移速度加速和内阻减小。
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| 关 键 词： | 储氢合金 储氢电极 保压时间 电化学性能 |
| 收稿时间： | 5/8/2011 8:23:42 AM |
| 修稿时间： | 5/8/2011 8:23:42 AM |
Effects of the pressure-holding time on the electrochemical properties of Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 metal hydride electrodes |
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| TianXiao,Liu Xiangdong,Yao Zhanquan and Hai shan.Effects of the pressure-holding time on the electrochemical properties of Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 metal hydride electrodes[J].Rare Metal Materials and Engineering,2012,41(5). |
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| Authors: | TianXiao Liu Xiangdong Yao Zhanquan and Hai shan |
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| Affiliation: | Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, School of Physics and Electronic Information, Inner Mongolia Normal University,School of Materials Science and Engineering, Inner Mongolia University of Technology,School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University,Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, School of Physics and Electronic Information, Inner Mongolia Normal University |
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| Abstract: | The Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 metal hydride electrodes were prepared at a pressure-holding time of t (t=10, 15, 20 and 25 minutes). The effects of the pressure-holding time on the activation performance, maximum discharge capacity, discharge potential characteristic and cycle stability of the electrode were investigated. The mechanism of the effects of the pressure-holding time on the electrochemical properties of metal hydride electrodes was also discussed in detail. The results show that the other electrochemical properties of the electrodes improve firstly and then degenerate with increasing pressure-holding time but to have no effect on the activation performance. The electrode at pressure-holding time of 15 min exhibits the best electrochemical properties. The improvements of the electrochemical properties are attributed to the increase of the charge-transfer reaction rate on the alloy and the decrease of the internal resistance of the electrodes. |
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| Keywords: | Hydrogen storage alloy Metal hydride electrode Pressure-holding time Electrochemical properties |
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