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The hydrogenation properties of La2Ni9CoAlx (x = 0.2, 0.3 and 0.4) non-stoichiometric alloys, in terms of their discharge capacity, the H2O/H2 exchange current density, hydrogen diffusivity and high rate dischargeability have been studied. The electrochemical tests have been carried out using chronopotentiometric and chronoamperometric methods. Electrochemical hydrogenation experiments at –185/+185...
The accuracy of determination of major parameters characterizing the composite, LaNi4.5Co0.5-based, hydride electrode (containing 0.03 g of active material) has been evaluated on the basis of 6 repetitions of 10-cycle charge/discharge curves. Relative error of discharge capacity decreases a little with electrode cycling and attains values on the level of 6% after 10 cycles. The exchange current density...
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