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La0.65Mg0.35Nix (x =3.0~3.5)储氢合金电极自放电性能研究
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国际科技合作项目(2006DFB52550);国家自然科学基金项目(20363001)


Investigation on the Self-Discharge Property of La0.65Mg0.35Nix (x = 3.0~3.5) Hydrogen Storage Alloy Electrodes
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    摘要:

    系统地研究了La0.65Mg0.35Nix (x=3.0~3.5)储氢合金电极的自放电性能。结果表明,随着Ni含量的增加,合金电极最大放电容量从350.6 mAh·g-1 (x=3.0)增加到351.2 mAh·g-1 (x=3.1),然后减小到244.1 mAh·g-1 (x=3.5)。72 h自放电的容量保持率从77.7% (x=3.0)增加到79.5% (x = 3.1),然后又降低到63.5% (x=3.5)。说明适中的Ni含量有利于降低合金电极的自放电率。通过测量合金电极的P-C-T曲线和合金的腐蚀曲线分析了合金电极自放电性能的变化规律。

    Abstract:

    The self-discharge property of La0.65Mg0.35Nix (x=3.0~3.5) hydrogen storage alloy electrodes was studied systematically. The results show that with the Ni content increasing, the maximum discharge capacity of the alloy electrodes increases from 350.6 mAh·g-1 (x=3.0) to 351.2 mAh·g-1 (x=3.1) and then decreases to 244.1 mAh·g-1 (x=3.5). Moreover, the capacity retention rate of 72 h self-discharge increases from 77.7% (x=3.0) to 79.5% (x=3.1), and then decreases to 63.5% (x=3.5), which indicates that the self-discharge property of the alloy electrodes is improved by the appropriate Ni content. The variety of the self-discharge property of the alloy electrodes with x value was analyzed by testing the electrochemical pressure-component-temperature (P-C-T) curves and corrosion curves of the alloy electrodes.

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盛 丹,春 林,孔繁清,熊 玮,闫慧忠. La0.65Mg0.35Nix (x =3.0~3.5)储氢合金电极自放电性能研究[J].稀有金属材料与工程,2011,40(8):1442~1445.[Sheng Dan, Chun Lin, Kong Fanqing, Xiong Wei, Yan Huizhong. Investigation on the Self-Discharge Property of La0.65Mg0.35Nix (x = 3.0~3.5) Hydrogen Storage Alloy Electrodes[J]. Rare Metal Materials and Engineering,2011,40(8):1442~1445.]
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  • 收稿日期:2010-08-29
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