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本文对LaNi_5的制备工艺条件与贮氢性能的关系进行了研究。测得在通常条件下每克分子LaNi_5最高贮氢量可达6.74克原子,在77K时达6.85克原子。着重探讨了材料组成与贮氢性能的关系,不同组成对压力组成等温线的影响,对解吸平衡压的稳定性的影响。测定了各温度下氢化物的压力组成等温线,计算了氢化物的反应焓变△H和熵变△S,对LaNi_5氢化物的吸氢、放氢速度也进行了测定。并对LaNi_5贮氘的性能进行了测定。
In this paper, LaNi_5 preparation process conditions and the relationship between hydrogen storage properties were studied. Measured under normal conditions LaNi_5 maximum storage capacity of up to 6.74 grams of atoms, up to 6.85 grams at 77K atoms. The relationship between material composition and hydrogen storage properties, the effect of different compositions on the pressure composition isotherms, and the effect on the stability of desorption equilibrium pressure are discussed. The pressure isotherms of hydrides at various temperatures were measured. The enthalpy change △ H and entropy change △ S of the hydrides were calculated. The hydrogen absorption rate and hydrogen evolution rate of LaNi_5 hydride were also measured. The performance of LaNi_5 deuterium storage was tested.