Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities
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Author(s)
Mao, Xianwen
Yang, XiaoQing
Wu, Jie
Tian, Wenda
Rutledge, Gregory C
Hatton, Trevor Alan
Date Issued
July 2015
Journal
Chemistry of Materials
Publisher
American Chemical Society (ACS)
Citation
Mao, Xianwen; Yang, Xiaoqing; Wu, Jie et al. “Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities.” Chemistry of Materials 27, 13 (July 2015): 4574–4585 © 2015 American Chemical Society
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Author's final manuscript
Abstract
We report the systematic structural manipulation of turbostratic electrospun carbon nanofibers (ECNFs) using a microwave-assisted oxidation process, which is extremely rapid and highly controllable and affords controlled variation of the capacitive energy storage capabilities of ECNFs. We find a nonmonotonic relationship between the oxidation degree of ECNFs and their electrocapacitive performance and present a detailed study on the electronic and crystalline structures of ECNFs to elucidate the origin of this nonmonotonic relation. The ECNFs with an optimized oxidation level show ultrahigh capacitances at high operation rates, exceptional cycling performance, and an excellent energy–power combination. We have identified three key factors required for optimal energy storage performance for turbostratic carbon systems: (i) an abundance of surface oxides, (ii) microstructural integrity, and (iii) an appropriate interlayer spacing.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1021/acs.chemmater.5b00854
