A potential material for hydrogen storage: a Li decorated graphitic-CN monolayer
A potential material for hydrogen storage: a Li decorated graphitic-CN monolayer
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一种潜在的储氢材料：Li修饰的石墨-CN单层
DOI：
10.1039/c8cp01145a
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发表时间：
2018-05-21
影响因子：
3.3
通讯作者：
Duan, Xiang-Mei
中科院分区：
文献类型：
--
作者：
Chen, Yong-Dao;Yu, Song;Duan, Xiang-Mei
Motivated by recent experimental developments of graphitic-CN (g-CN) sheets, we investigate the suitability of hydrogen storage on Li decorated g-CN via first-principles calculations. We find that the binding energies of Li atoms are very large, ranging from 2.70 to 4.73 eV, which are significantly higher than the cohesive energy of bulk Li. Lithium atoms therefore tend to form 2D rather than 3D patterns on g-CN, promoting reversible hydrogen adsorption and desorption. Remarkably, the average adsorption energy of H-2 molecules falls in the 0.14-0.23 eV range, and the Li decorated CN shows a high theoretical gravimetric density of 10.81 wt%, which is favorable for massive hydrogen storage. Our results suggest that the Li decorated CN could be a promising hydrogen storage material under realistic conditions.
