贮氢合金动力学测试方法的研究

Behavior Determination for Hydrogen Storage Alloys by Means of Kinetics

通过对贮氢合金动力学主要研究内容的分析，研究探讨了在等容差压法热力学测试装置上进行等温等压的吸放氢动力学曲线的测定。用该装置直接进行测定，只能得到压力变化的动力学曲线，为解决等压问题，采用了在不同初始氢压下进行多条吸氢曲线的测试、计算并绘出某一恒定氢压下吸氢量与吸氢速度的关系曲线，进而利用数值积分公式计算并绘出吸氢量与时间关系动力学曲线。通过ＬａＮｉ＿５合金动力学曲线的测定，证明了该合金的良好动力学性能和测定方法的可信性。

Determination of isothermal and isobaric kinetic curves of hydrogen absorptionand desorption on measuring apparatus with isochoric and variable-pressure features is inves-tigated and discussed after the major topics of the kinetics of hydrogen storage alloys beinganalysed.Derict measurement on such apparatus can give kinetic curves under variable pres-sure only.In order to obtain the isobariccurres,a largeamount of obsorption curves is mea-sured under various initial pressure of hydrogen,the relationship curve of absorption amountand absorption rate under specific constant pressure is calculated and plotted,and the kineticcurve of the absorption amount with the time is further figured out and plotted by means ofnumeric integration.Determination of kinetic curve for alloy LaNi_5 is conducted using abovementioned method and it is shown that this alloy possesses a fine kinetic behavior and in thesame time,this method is proved to be a reliabe one.