High-Density Hydrogen Storage in a 2D-Matrix from Graphene Nanoblisters: A Prospective Nanomaterial for Environmentally Friendly Technologies

In this paper, the atomic structure and mechanical stability of a new structural graphene modification—a 2D matrix of nanoscale cells in the form of a few-layer graphene substrate and nanoblister of a graphene monolayer—were studied for the first time. It is shown that such matrices are mechanically...

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Bibliographic Details
Published in:Crystals (Basel) 2018-04, Vol.8 (4), p.161
Main Authors: Slepchenkov, Michael, Barkov, Pavel, Glukhova, Olga
Format: Article
Language:English
Subjects:
2D matrix
Adhesives
Atomic structure
Bond strength
Carbon
Chemical bonds
Crystal defects
Defects
Density
Energy
External pressure
Graphene
graphene nanoblister
Hydrogen
Hydrogen storage
local stress field
Mechanical properties
mechanical stability
Nanomaterials
Stress distribution
Structural stability
Substrates
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Summary:In this paper, the atomic structure and mechanical stability of a new structural graphene modification—a 2D matrix of nanoscale cells in the form of a few-layer graphene substrate and nanoblister of a graphene monolayer—were studied for the first time. It is shown that such matrices are mechanically stable and are promising for environmentally friendly technologies. The calculated local atomic stress fields demonstrate that the atomic framework is not destroyed, even in the presence of defects in the atomic network of graphene nanoblister (Stone-Wales defect, double vacancies defect, ad-dimmer defect, and their combination). However, it was established that the presence of one or more SW defects leads to the appearance of critical stresses. These critical stresses can induce local bond breaking in the atomic network with an increase in temperature or external pressure. It was found that graphene nanoblister can store molecular hydrogen with a maximum density of 6.6 wt % for 1158 m2/g at 77 K under normal pressure.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst8040161