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This paper describes the effects of treating the alloy powder of an electrode with 6 M KOH solution containing y M KBH 4 (y=0.0, 0.005, 0.01, 0.02 and 0.03) on the kinetic properties of the electrode, including high rate dischargeablilty HRD, exchange current density I 0 , symmetry factor β, limiting current density I L , diffusion coefficient of hydrogen in the α-phase D α , and electrochemical polarization η e and concentration polarization η c . The results show that the kinetic parameters HRD, I 0 , I L and D α increase markedly with the increase in the concentration of KBH 4 , the η e and η c decrease rapidly with increasing concentration of KBH 4 , but the symmetry factor β does not change.
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