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Title: In situ fabrication of Ni(OH){sub 2} nanofibers on polypyrrole-based carbon nanotubes for high-capacitance supercapacitors

Abstract

Highlights: ► Facile surface decoration approach to highly porous Ni(OH){sub 2}/CNT composites. ► Polypyrrole-based CNTs form three-dimensional electron-transport channels. ► A high capacitance of 1118 F g{sup −1} at 50 mA cm{sup −2} is delivered. ► Ni(OH){sub 2}/CNT composites exhibit high discharge capability. - Abstract: Large-scale nickel hydroxide–carbon [Ni(OH){sub 2}/CNT] networks with three-dimensional electron-transport channels are synthesized via a facile and general surface-decoration approach, using polypyrrole-derived CNTs as the support. Flexible Ni(OH){sub 2} nanofibers with a diameter of 5–10 nm and a length of 50–120 nm are intertwined and wrapped homogenously on carbon networks, leading to the formation of more complex networks. When used as supercapacitor electrodes, this designed architecture with large surface area, abundant pores and good electrical conductivity is very important in technology. It can promote the bulk accessibility of electrolyte OH{sup −} and diffusion rate within the redox phase. Consequently, an unusual specific capacitance of 1745 F g{sup −1} can be obtained for Ni(OH){sub 2}/CNT composite at 30 mA cm{sup −2}. Even at a high rate (50 mA cm{sup −2}), the composite can also deliver a specific capacitance as high as 1118 F g{sup −1}, exhibiting the potential application for supercapacitors.

Authors:
 [1];  [1];  [2];  [3]
  1. School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046 (China)
  2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049 (China)
  3. Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011 (China)
Publication Date:
OSTI Identifier:
22290413
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 48; Journal Issue: 3; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CAPACITIVE ENERGY STORAGE EQUIPMENT; CARBON NANOTUBES; ELECTRIC CONDUCTIVITY; ELECTROCHEMISTRY; ELECTROLYTES; FABRICATION; LENGTH; NICKEL HYDROXIDES; POROUS MATERIALS; SURFACE AREA; SURFACES; SYNTHESIS

Citation Formats

Fan, Jianzhang, Mi, Hongyu, Xu, Youlong, and Gao, Bo. In situ fabrication of Ni(OH){sub 2} nanofibers on polypyrrole-based carbon nanotubes for high-capacitance supercapacitors. United States: N. p., 2013. Web. doi:10.1016/J.MATERRESBULL.2012.12.040.
Fan, Jianzhang, Mi, Hongyu, Xu, Youlong, & Gao, Bo. In situ fabrication of Ni(OH){sub 2} nanofibers on polypyrrole-based carbon nanotubes for high-capacitance supercapacitors. United States. doi:10.1016/J.MATERRESBULL.2012.12.040.
Fan, Jianzhang, Mi, Hongyu, Xu, Youlong, and Gao, Bo. Fri . "In situ fabrication of Ni(OH){sub 2} nanofibers on polypyrrole-based carbon nanotubes for high-capacitance supercapacitors". United States. doi:10.1016/J.MATERRESBULL.2012.12.040.
@article{osti_22290413,
title = {In situ fabrication of Ni(OH){sub 2} nanofibers on polypyrrole-based carbon nanotubes for high-capacitance supercapacitors},
author = {Fan, Jianzhang and Mi, Hongyu and Xu, Youlong and Gao, Bo},
abstractNote = {Highlights: ► Facile surface decoration approach to highly porous Ni(OH){sub 2}/CNT composites. ► Polypyrrole-based CNTs form three-dimensional electron-transport channels. ► A high capacitance of 1118 F g{sup −1} at 50 mA cm{sup −2} is delivered. ► Ni(OH){sub 2}/CNT composites exhibit high discharge capability. - Abstract: Large-scale nickel hydroxide–carbon [Ni(OH){sub 2}/CNT] networks with three-dimensional electron-transport channels are synthesized via a facile and general surface-decoration approach, using polypyrrole-derived CNTs as the support. Flexible Ni(OH){sub 2} nanofibers with a diameter of 5–10 nm and a length of 50–120 nm are intertwined and wrapped homogenously on carbon networks, leading to the formation of more complex networks. When used as supercapacitor electrodes, this designed architecture with large surface area, abundant pores and good electrical conductivity is very important in technology. It can promote the bulk accessibility of electrolyte OH{sup −} and diffusion rate within the redox phase. Consequently, an unusual specific capacitance of 1745 F g{sup −1} can be obtained for Ni(OH){sub 2}/CNT composite at 30 mA cm{sup −2}. Even at a high rate (50 mA cm{sup −2}), the composite can also deliver a specific capacitance as high as 1118 F g{sup −1}, exhibiting the potential application for supercapacitors.},
doi = {10.1016/J.MATERRESBULL.2012.12.040},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 3,
volume = 48,
place = {United States},
year = {2013},
month = {3}
}