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Electrochemical Performance Improvement of AB5-type Metal Hydride Electrode by Adding KF in KOH Electrolyte
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Electrochemical Performance Improvement of AB5-type Metal Hydride Electrode by Adding KF in KOH Electrolyte
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project supported by GD-MOE Coordination; project of Industry Academic and Research (2008B090500274); Chengdu Key Technologies R&D program (10GGYB897GX-023)

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    研究了在6 mol/L KOH 電解液中添加不同濃度KF 對商用AB5-型貯氫合金的電化學(xué)性能的影響，研究發(fā)現(xiàn)合金的循環(huán)性能和循環(huán)后期的高倍率性能提高，通過XRD, SEM, SEI等分析表明，在電解液中添加KF生成的LaF3能顯著提高合金耐腐蝕的能力，同時阻止合金電極在循環(huán)過程中析氫過電位降低，提高合金的動力學(xué)性能

    Abstract:

    The influence of the added KF concentration in the 6 mol/L KOH electrolyte on the electrochemical performances of the commercial AB5-type hydrogen storage alloy was investigated. The cycle life and high-rate performance of the commercial AB5-type hydrogen storage alloy can be improved by adding KF to the electrolyte. The analyses of XRD, SEM and SEI show that the formation of LaF3 in KF-added electrode can obviously decrease the corrosion of the metal hydride electrode compared with that of the KF-free electrode which prevents the dropping of the hydrogen evolution reaction voltage of the electrode and results in the improvement of electrochemical dynamics of the electrode

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陳藝文,陳云貴,朱 丁,吳朝玲,晁棟梁. Electrochemical Performance Improvement of AB5-type Metal Hydride Electrode by Adding KF in KOH Electrolyte[J].稀有金屬材料與工程,2013,42(5):905~908.[Chen Yiwen, Chen Yungui, Zhu Ding, Wu Chaoling, Chao Dongliang. Electrochemical Performance Improvement of AB5-type Metal Hydride Electrode by Adding KF in KOH Electrolyte[J]. Rare Metal Materials and Engineering,2013,42(5):905~908.]
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  • 收稿日期:2012-05-25
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