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나노 구조 물리 연구단
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Room-temperature hydrogen storage via two-dimensional potential well in mesoporous graphene oxide

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Title
Room-temperature hydrogen storage via two-dimensional potential well in mesoporous graphene oxide
Author(s)
Tae Hyung Kim; Bae J.; Tae Hoon Lee; Hwang J.; Jung J.H.; Kim D.K.; Lee J.S.; Kim D.O.; Young Hee Lee; Ihm J.
Publication Date
2016-09
Journal
NANO ENERGY, v.27, no., pp.402 - 411
Publisher
Elsevier BV
Abstract
Hydrogen is an excellent energy carrier free of carbon dioxide emission, but safe and efficient storage of hydrogen has been a bottleneck for the commercial use of hydrogen as a fuel. Here, we present a strategy based on simple thermodynamic principles that the density of a gas residing in a potential well increases exponentially relative to the ambient gas by the corresponding Boltzmann factor. This mechanism allows for enormously enhanced H2 storage in the form of delocalized gas permeating throughout the void space of a material, in contrast to conventional storage localized to specific adsorption sites. We create mesoporous graphene oxide that provides a two-dimensional potential well and efficient hydrogen diffusion pathways. The gravimetric storage density measured with quartz-crystal microbalance reaches 4.65 wt% reproducibly at a modest pressure of 40 atm at room temperature. Our work demonstrates the attainability of the long-standing goal of room-temperature hydrogen storage. © 2016 Elsevier Lt
URI
https://pr.ibs.re.kr/handle/8788114/2789
ISSN
2211-2855
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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