Abstract: La0.8-xCexMg0.2Ni3Co0.6 hydrogen storage alloy is prepared by medium frequency induction melting method.The phase composition,microstructure and electrochemical properties of the annealed La0.8-xCexMg0.2Ni3Co0.6 hydrogen storage alloy with different Ce substitution rates are studied.It is shown that main phases of La0.8-xCexMg0.2Ni3Co0.6 hydrogen storage alloy include (La,Mg)Ni3,(La,Mg)2Ni7 and LaNi5 phases.As x value rises from 0 to 0.20,both the maximum discharge capacity Cmax and corrosion current density(i) of the alloy decrease gradually,the cycle life of S100 charge-discharge increases gradually,the exchange current density I0 increases first and decreases then,the hydrogen diffusion coefficient D0 decreases gradually,and the high-rate discharge performance increases first and decreases then.The high-rate discharge performance of the alloy reaches the maximum when x=0.10.The high-rate discharge performance of the alloy is mainly determined by I0.
苏张磊, 李玮, 罗志敏. 汽车电池负极材料的制备与电化学性能研究[J]. 现代化工, 2022, 42(7): 141-146.
SU Zhang-lei, LI Wei, LUO Zhi-min. Preparation of anode materials for automotive batteries and research on their electrochemical properties. Modern Chemical Industry, 2022, 42(7): 141-146.
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