Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors
Name
s42004-018-0017-z.pdf
Description
Published version
Size
2.41 MB
Format
Adobe PDF
Checksum (MD5)
ba9a39f37fbec3cbf49e726316f644ae
Author(s)
Terrones, Mauricio
Date Issued
April 2018
Journal
Communications Chemistry
Publisher
Springer Nature
Citation
Gong, W., et al., "Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors." Communications Chemistry 1 (2018): no. 16 doi: 10.1038/s42004-018-0017-z ©2018 Author(s)
Version
Final published version
Abstract
Manganese oxide (MnO [subscript]2) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO [subscript]2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO [subcript]2. In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO [subscript]2); the thickness of the CNT/MnO [subscript]2 hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm−1. When assembling symmetric devices featuring Ni/CNT/MnO [subscript]2 coaxial electrodes as cathode and anode together with a 1.0 M Na [subscript]2 SO [subscript]4 aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm−1. These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1038/S42004-018-0017-Z
