Abstract This study mainly analyzed the effect of CeO 2 on the hydrogen release capacity of LiAlH 4 by PCT (Pressure-Composition-Temperature) device and SEM (Scanning Electron Microscope) analysis method. The results show that with CeO 2 doping shortens markedly the time of hydrogen release of LiAlH 4 . Among all samples, the dehydrogenation time of the sample doped with 2 mol% CeO 2 is the earliest. The study on the amount of hydrogen release finds that the sample doped with 1 mol% CeO 2 presents the largest dehydrogenation amount. And with the increase of the doping amount from 1 mol% to 5 mol%, the total hydrogen release amount of the samples presents a decrease trend. Furthermore, the study on microstructures show that doping with CeO 2 does not cause any obvious change of the microstructure of LiAlH 4 , and all samples show a kind of flocculent structure.