Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 39, Issue 15, Pages 7859-7867Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.03.106
Keywords
Mesoporous carbon nanofiber; Nanostructured carbon; Hierarchical porosity; Electrochemical hydrogen storage
Categories
Funding
- NSERC (National Science and Engineering Research Council of Canada)
- Carbon Management Canada (CMC) [B222]
- Pacific Institute for Climate Solutions (PICS)
- National Basic Research Program of China (973 Program) [2013CB934001]
- National Natural Science Foundation of China [51074011, 51274017]
- National 863 Program of China [2011AA11A257]
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A colloidal silica incorporated porous anodic aluminum oxide (AAO) was utilized as a dual-template to prepare mesoporous carbon nanofibers (MCNFs). Such a strategy is simple because it takes advantage of commercially available materials (i.e., colloidal silica and AAO) and the templates can be removed in one step. The as-prepared MCNF shows a hierarchical nanostructure consisting of open macroporous channel connected with large mesopores and micropores. As a result of the large surface area and unique hierarchical nanoarchitecture which facilitates fast mass and electron transport, the MCNF reveals a discharge capacity of 679 mA h g(-1) at 25 mA g(-1). This value is significantly greater than that (i.e., 394 mA h g(-1)) observed for an ordered mesoporous carbon (OMC) with a similar specific surface area. Furthermore, at 3000 mA g(-1), the MCNF demonstrates a discharge capacity of 585 mA h g(-1), which is about twice that (i.e., 256 mA h g(-1)) of the OMC. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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