Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities
Author(s)
Mao, Xianwen; Yang, XiaoQing; Wu, Jie; Tian, Wenda; Rutledge, Gregory C; Hatton, Trevor Alan; ... Show more Show less
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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.
Date issued
2015-07Department
Massachusetts Institute of Technology. Department of Chemical Engineering; Massachusetts Institute of Technology. Department of ChemistryJournal
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
Version: Author's final manuscript
ISSN
0897-4756
1520-5002