Li decorated 6,6,12-graphyne: A new star for hydrogen storage material

Jinlian Lu, Yanhua Guo, Yun Zhang, Juexian Cao

科研成果: 期刊稿件文章同行评审

49 引用 (Scopus)

摘要

Based on ab initio calculations, we investigated the hydrogen storage capacity of Li decorated 6,6,12-graphyne (Li@GY). Due to the unique sp hybridization in GY, Li atoms can strongly bind to carbon atoms to avoid the formation of Li clusters on the surface of GY. It is found that the hydrogen storage capacity of Li@GY is high up to 19.3 wt% with the average adsorption energy of -0.230 eV which lying in the ideal adsorption energy range for practical application of hydrogen economy. The density of states and charge density difference demonstrated that the adsorption mechanism mainly depended on the electrostatic field produced by the Li ions on GY. Moreover, the formation of super hydrogen molecules induced by the electrostatic field around Li ions can further enhance the hydrogen absorption energy. Our results indicated that Li decorated 6,6,12-graphyne would be a potential material for hydrogen storage.

源语言英语
页(从-至)17112-17117
页数6
期刊International Journal of Hydrogen Energy
39
30
DOI
出版状态已出版 - 13 10月 2014

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