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The enhanced hydrogen storage capacity of carbon fibers: The effect of hollow porous structure and surface modification

Title
The enhanced hydrogen storage capacity of carbon fibers: The effect of hollow porous structure and surface modification
Authors
Hwang, Sung-HoKim, Young KwangSeo, Hye-JinJeong, Soon MoonKim. JongwonLim, Sang Kyoo
DGIST Authors
Hwang, Sung-Ho; Kim, Young Kwang; Seo, Hye-Jin; Jeong, Soon Moon; Kim. Jongwon; Lim, Sang Kyoo
Issue Date
2021-07
Citation
Nanomaterials, 11(7), 1830
Type
Article
Author Keywords
Carbon fiberHydrogen storageMicroporositySurface modification
ISSN
2079-4991
Abstract
In this study, highly porous carbon fiber was prepared for hydrogen storage. Porous carbon fiber (PCF) and activated porous carbon fiber (APCF) were derived by carbonization and chemical activation after selectively removing polyvinyl alcohol from a bi-component fiber composed of polyvinyl alcohol and polyacrylonitrile (PAN). The chemical activation created more pores on the surface of the PCF, and consequently, highly porous APCF was obtained with an improved BET surface area (3058 m2 g−1) and micropore volume (1.18 cm3 g−1) compare to those of the carbon fiber, which was prepared by calcination of monocomponent PAN. APCF was revealed to be very efficient for hydrogen storage, its hydrogen capacity of 5.14 wt% at 77 K and 10 MPa. Such hydrogen storage capacity is much higher than that of activated carbon fibers reported previously. To further enhance hydrogen storage capacity, catalytic Pd nanoparticles were deposited on the surface of the APCF. The Pd-deposited APCF exhibits a high hydrogen storage capacity of 5.45 wt% at 77 K and 10 MPa. The results demonstrate the potential of Pd-deposited APCF for efficient hydrogen storage. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/15370
DOI
10.3390/nano11071830
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Related Researcher
Files:
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Collection:
Division of Energy Technology1. Journal Articles


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