节点文献
原位析出Li3Bi对Li-Mg-N-H体系放氢动力学性能的影响
In situ formation of Li3Bi and its improvement on the dehydrogenation kinetic property of Li-Mg-N-H system
【摘要】 基于对Li-Mg-N-H体系放氢动力学机理的研究发现,其放氢过程的速率控制步骤是Li+、H+或H-的扩散。在实验中,原位析出的Li3Bi相增加了Li-Mg-N-H体系放氢过程中Li+离子的扩散速率,进而使得该体系在200℃下放氢量(质量分数)从4.37%增加到4.55%,达到90%放氢量的放氢时间从298min缩短到11min。
【Abstract】 Based on the understanding of dehydrogenation and hydrogenation reaction mechanism,the origin of kinetic barrier of the Li-Mg-N-H system is the mobility.In the experiment,the formation of Li3 Bi phase increases the diffusion rate of Li+.The dehydrogenation capacity(mass fraction)is increased from 4.37%to 4.55%and the time required for 90% dehydrogenation is reduced from 298 min to around 11 min for the sample with 10% Bi(mass fraction)measured at 200 ℃.
【关键词】 储氢材料;
Li-Mg-N-H Li3Bi;
放氢;
【Key words】 hydrogen storage material; Li-Mg-N-H Li3Bi; hydrogen desorption;
【Key words】 hydrogen storage material; Li-Mg-N-H Li3Bi; hydrogen desorption;
【基金】 国家重点基础研究发展(973)计划(2010CB631305)
- 【文献出处】 金属功能材料 ,Metallic Functional Materials , 编辑部邮箱 ,2015年05期
- 【分类号】TB34
- 【被引频次】1
- 【下载频次】90