Author/Authors :
Kou، نويسنده , , Huaqin and Sang، نويسنده , , Ge and Zhou، نويسنده , , Yuanlin and Wang، نويسنده , , Xiaoying and Huang، نويسنده , , Zhiyong and Luo، نويسنده , , Wenhua and Chen، نويسنده , , Lixin and Xiao، نويسنده , , Xuezhang and Yang، نويسنده , , Guiying and Hu، نويسنده , , Changwen، نويسنده ,
Abstract :
In this work, the hydriding–dehydriding properties of the LiBH4–NbF5 mixtures were investigated. It was found that the dehydrogenation and reversibility properties of LiBH4 were significantly improved by NbF5. Temperature-programed dehydrogenation (TPD) showed that 5LiBH4–NbF5 sample started releasing hydrogen from as low as 60 °C, and 4 wt.% hydrogen could be obtained below 255 °C. Meanwhile, ∼7 wt.% H2 could be reached at 400 °C in 20LiBH4–NbF5 sample, whereas pristine LiBH4 only released ∼0.7 wt.% H2. In addition, reversibility measurement demonstrated that over 4.4 wt.% H2 could still be released even during the fifth dehydrogenation in 20LiBH4–NbF5 sample. The experimental results suggested that a new borohydride possibly formed during ball milling the LiBH4–NbF5 mixtures might be the source of the active effect of NbF5 on LiBH4.
Keywords :
Hydrogen storage , LiBH4 , NbF5 , Dehydrogenation , reversibility
