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arXiv 0901.1944cond-mat.mes-hall
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金属化石墨烯的高容量储氢

High-capacity hydrogen storage by metallized graphene

C. Ataca, E. Akturk, S. Ciraci, H. Ustunel

摘要:

第一性原理平面波计算预测Li可以吸附在石墨烯上,在两侧形成均匀且稳定的覆盖。$2s$轨道的电子电荷的很大一部分被贡献给石墨烯,并由其扭曲的$π^*$带容纳.结果,半金属石墨烯和半导体石墨烯带变成了好的金属。甚至更值得注意的是,Li覆盖的石墨烯可以用作高容量储氢介质,其中每个吸附的Li吸收多达四个H $_2$分子,总计重量密度为12.8重量%。

英文摘要:

First-principles plane wave calculations predict that Li can be adsorbed on graphene forming a uniform and stable coverage on both sides. A significant part of the electronic charge of the Li-$2s$ orbital is donated to graphene and is accommodated by its distorted $π^*$-bands. As a result, semimetallic graphene and semiconducting graphene ribbons change into good metals. It is even more remarkable that Li covered graphene can serve as a high-capacity hydrogen storage medium with each adsorbed Li absorbing up to four H$_2$ molecules amounting to a gravimetric density of 12.8 wt%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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