Activation of hydrogen storage materials in the Li–Mg–N–H system: Effect on storage properties
Activation of hydrogen storage materials in the Li–Mg–N–H system: Effect on storage properties
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DOI：
10.1016/j.jallcom.2006.05.039
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发表时间：
2007-03
影响因子：
6.2
通讯作者：
Jun Yang;A. Sudik;C. Wolverton
中科院分区：
文献类型：
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作者：
Jun Yang;A. Sudik;C. Wolverton
我们研究了储氢反应的热力学、动力学和容量：Li2Mg(NH)2+2H2⇔Mg(NH2)2+2LiH。从 LiNH2 和 MgH2 开始，之前已经提出了两种不同的程序来激活样品以诱导可逆存储反应。我们在此阐明这两种活化程序对 Li-Mg-N-H 反应容量的影响。此外，我们还测量了该储氢系统的温度相关动力学吸收数据。最后，我们的实验证实了之前报道的形成焓 (ΔH)、氢容量和压力-成分-等温线 (PCI) 数据，并表明该系统代表了车载存储应用的动力学（但不是热力学）受限系统。
We investigate the thermodynamics, kinetics, and capacity of the hydrogen storage reaction: Li2Mg(NH)2+2H2⇔Mg(NH2)2+2LiH. Starting with LiNH2and MgH2, two distinct procedures have been previously proposed for activating samples to induce the reversible storage reaction. We clarify here the impact of these two activation procedures on the resulting capacity for the Li–Mg–N–H reaction. Additionally, we measure the temperature-dependent kinetic absorption data for this hydrogen storage system. Finally, our experiments confirm the previously reported formation enthalpy (ΔH), hydrogen capacity, and pressure–composition–isotherm (PCI) data, and suggest that this system represents a kinetically (but not thermodynamically) limited system for vehicular on-board storage applications.