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对比研究了烧结法和熔炼法制备的Ti3Ni2合金的储氢性能。结果显示,烧结合金具有多孔特性,有利于提高合金的电化学储氢性能。烧结合金的最大放电容量Cmax为305mAh/g,其值远高于熔炼合金的Cmax(242mAh/g)。另外,烧结合金在电化学动力学方面也优于熔炼合金,这主要是由于采用烧结法可以改善氢在Ti3Ni2合金中的扩散,从而使氢的扩散系数(D)从7.16×10-10cm2/s(熔炼合金)提高到3.2×10-9cm2/s(烧结合金)。
The hydrogen storage properties of Ti3Ni2 alloy prepared by sintering and melting methods were compared. The results show that the sintered alloy has porous characteristics, which is conducive to improve the electrochemical hydrogen storage properties of the alloy. The maximum discharge capacity Cmax of the sintered alloy is 305mAh / g, much higher than that of the smelting alloy (242mAh / g). In addition, the sintered alloy is also superior to the smelting alloy in terms of electrochemical kinetics, which is mainly due to the fact that the diffusion of hydrogen in the Ti3Ni2 alloy can be improved by the sintering method so that the hydrogen diffusion coefficient (D) increases from 7.16 × 10 -10 cm 2 / s (Smelting alloy) to 3.2 × 10 -9 cm 2 / s (sintered alloy).