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主要通过PCT设备研究了掺杂Y2O3的LiAlH4试样的放氢性能。结果显示,随着Y2O3掺杂量的增加,LiAlH4的放氢量增加,然而,当掺杂量达到某一值时,LiAlH4的放氢量随着掺杂量的增加而降低。和LiAlH4原样相比,掺杂Y2O3的试样初始放氢时间提前。此外,关于Y2O3对LiAlH4放氢速率影响的研究还发现,所有掺杂试样的放氢速率都比未掺杂原样的放氢速率快。并且所有掺杂试样的放氢速率的变化趋势都是相似的,即:随着时间的延长,放氢速率快速增大之后逐步降低。
The desorption performance of Li2O3-doped LiAlH4 samples was mainly studied by PCT equipment. The results show that with the increase of Y2O3 doping amount, the amount of hydrogen desorption of LiAlH4 increases. However, when the doping amount reaches a certain value, the desorption capacity of LiAlH4 decreases with the doping amount. Compared with the original sample of LiAlH4, the initial doping time of Y2O3-doped sample was earlier. In addition, the study on the effect of Y2O3 on the rate of hydrogen evolution in LiAlH4 also found that the rate of hydrogen evolution was faster in all the doped samples than in the un-doped one. And the trend of hydrogen release rates of all the doped samples are similar, that is: with the extension of time, the hydrogen release rate increases rapidly and then gradually decreases.