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Carbon Nanofiber Aerogel Converted from Bacterial Cellulose for Kilohertz AC-Supercapacitors

Published online by Cambridge University Press:  30 January 2018

Nazifah Islam ,
Md Nadim Ferdous Hoque ,
Yujiao Zu ,
Shu Wang  and
Zhaoyang Fan
Nazifah Islam
Affiliation:
Department of Electrical and Computer Engineering and Nano Tech Center, Texas Tech University, Lubbock, TX79409, U.S.A.
Md Nadim Ferdous Hoque
Affiliation:
Department of Electrical and Computer Engineering and Nano Tech Center, Texas Tech University, Lubbock, TX79409, U.S.A.
Yujiao Zu
Affiliation:
Department of Nutritional Sciences, Texas Tech University, Lubbock, TX79409, U.S.A.
Shu Wang
Affiliation:
Department of Nutritional Sciences, Texas Tech University, Lubbock, TX79409, U.S.A.
Zhaoyang Fan*
Affiliation:
Department of Electrical and Computer Engineering and Nano Tech Center, Texas Tech University, Lubbock, TX79409, U.S.A.
*
*(Email: zhaoyang.fan@ttu.edu)
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Abstract

Compact-size kilohertz (kHz) AC-supercapacitors are being pursued for ripple current filtering and pulsed energy storage. However, their development is limited by a small areal capacitance density due to very thin electrode used for meeting frequency requirement. In our work, crosslinked carbon nanofiber aerogel (CCNFA) was investigated as freestanding electrode for kHz AC-supercapacitors with an areal capacitance density as large as 4.5 mF cm-2 at 120 Hz, 5-10 times larger than most reports. The CCNFA was obtained in a rapid plasma carbonization process of bacterial cellulose. The fabrication route adopted here is simple and straightforward, and the produced CCNFA electrode was found to be very suitable for high-frequency AC-supercapacitors. The operating voltage range of CCNFA based AC-supercapacitors can be expanded to 3 V by utilizing an organic electrolyte. In addition to AC-Supercapacitor performance, the morphology and material properties of bacterial cellulose aerogel and CCNFA were also reported.

Keywords

aerogelnanostructureenergy storage
Type
Articles
Information
MRS Advances , Volume 3 , Issue 15-16: Nanomaterials , 2018 , pp. 855 - 860
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Copyright
Copyright © Materials Research Society 2018 

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References

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