화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.13, No.6, 521-528, December, 2005
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Electrospun Polyacrylonitrile-Based Carbon Nanofibers and Their Hydrogen Storages
Dong-Kyu Kim, Sun Ho Park, Byung Chul Kim, Byung Doo Chin1, Seong Mu Jo1, †, and Dong Young Kim1
  • Division of Applied Chemical Engineering, Hanyang University, Seoul 133-791, Korea
  • 1Optoelectronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
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Electrospun polyacrylonitrile (PAN) nanofibers were carbonized with or without iron (III) acetylacetonate to induce catalytic graphitization within the range of 900-1,500 ℃, resulting in ultrafine carbon fibers with a diameter of about 90-300 nm. Their structural properties and morphologies were investigated. The carbon nanofibers (CNF) prepared without a catalyst showed amorphous structures and very low surface areas of 22-31 m2/g. The carbonization in the presence of the catalyst produced graphite nanofibers (GNF). The hydrogen storage capacities of these CNF and GNF materials were evaluated through the gravimetric method using magnetic suspension balance (MSB) at room temperature and 100 bar. The CNFs showed hydrogen storage capacities which increased in the range of 0.16-0.50 wt% with increasing carbonization temperature. The hydrogen storage capacities of the GNFs with low surface areas of 60-253 m2/g were 0.14-1.01 wt%. Micropore and mesopore, as calculated using the nitrogen gas adsorption-desorption isotherms, were not the effective pore for hydrogen storage.
Keywords:electrospun PAN nanofiber;carbon nanofiber;graphite nanofiber;hydrogen storage
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