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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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    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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[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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  • Received:May 25,2012
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