Effect of the temperature on electrode performance of the as cast La0.7Mg0.3(NiMnCo)3.5 alloy

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• 作者：P. Lv ; Z.-M. Wang ; J.-Q. Deng
• 关键词：hydrogen storage alloy ; electrode performance ; cyclic stability ; self ; discharge ; high ; rate discharge
• 刊名：Russian Journal of Electrochemistry
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：51
• 期：7
• 页码：638-644
• 全文大小：1,182 KB
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• 作者单位：P. Lv (1)
  Z.-M. Wang (1)
  J.-Q. Deng (1)
  
  1. School of Materials Science & Engineering, Guilin University of Electronic Technology, No. 1, Jinji Road, Guilin, 541004, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3342

文摘

A series of experiments were performed to investigate the effect of the temperature on electrode performance of the as-cast La0.7Mg0.3(NiMnCo)3.5 alloy. XRD and SEM show that La0.7Mg0.3(NiMnCo)3.5 alloy has LaNi5 and La2Ni7 phase. The activation curves show that the as-cast La0.7Mg0.3(NiMnCo)3.5 alloy electrode can be activated in three times and the maximum discharge capacity is 358.74 mA h/g at 273 K. With increasing the temperature, the cyclic stability of the alloy electrode decreases obviously. And the capacity retention decreases from 96.14 to 63.53% when the temperature increases from 238 to 303 K. It also can be seen that the as-cast La0.7Mg0.3(NiMnCo)3.5 alloy electrode has the best self-discharge ability at 238 K and the best high-rate discharge ability at 273 K.