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In the last decade, pyrolyzed-carbon-based composites have attracted much attention for their applications in micro-supercapacitors. Although various methods have been investigated to improve the performance of pyrolyzed carbons, such as conductivity, energy storage density and cycling performance, effective methods for the integration and mass-production of pyrolyzed-carbon-based composites on a large scale are lacking. Here, we report the development of an optimized photolithographic technique for the fine micropatterning of photoresist/chitosan-coated carbon nanotube (CHIT-CNT) composite. After subsequent pyrolysis, the fabricated carbon/CHIT-CNT microelectrode-based micro-supercapacitor has a high capacitance (6.09 mF·cm–2) and energy density (4.5 mWh·cm–3) at a scan rate of 10 mV·s–1. Additionally, the micro-supercapacitor has a remarkable long-term cyclability, with 99.9% capacitance retention after 10, 000 cyclic voltammetry cycles. This design and microfabrication process allow the application of carbon microelectromechanical system (C-MEMS)-based micro-supercapacitors due to their high potential for enhancing the mechanical and electrochemical performance of micro-supercapacitors.


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Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors

Show Author's information Yanjuan Yang1Liang He1( )Chunjuan Tang1,2Ping Hu1Xufeng Hong1Mengyu Yan1Yixiao Dong1Xiaocong Tian1Qiulong Wei1Liqiang Mai1( )
State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan430070China
Department of Mathematics and PhysicsLuoyang Institute of Science and TechnologyLuoyang471023China

Abstract

In the last decade, pyrolyzed-carbon-based composites have attracted much attention for their applications in micro-supercapacitors. Although various methods have been investigated to improve the performance of pyrolyzed carbons, such as conductivity, energy storage density and cycling performance, effective methods for the integration and mass-production of pyrolyzed-carbon-based composites on a large scale are lacking. Here, we report the development of an optimized photolithographic technique for the fine micropatterning of photoresist/chitosan-coated carbon nanotube (CHIT-CNT) composite. After subsequent pyrolysis, the fabricated carbon/CHIT-CNT microelectrode-based micro-supercapacitor has a high capacitance (6.09 mF·cm–2) and energy density (4.5 mWh·cm–3) at a scan rate of 10 mV·s–1. Additionally, the micro-supercapacitor has a remarkable long-term cyclability, with 99.9% capacitance retention after 10, 000 cyclic voltammetry cycles. This design and microfabrication process allow the application of carbon microelectromechanical system (C-MEMS)-based micro-supercapacitors due to their high potential for enhancing the mechanical and electrochemical performance of micro-supercapacitors.

Keywords: pyrolysis, carbon nanotubes, supercapacitors, photolithography, microelectromechanical system (MEMS)

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Publication history
Copyright
Acknowledgements

Publication history

Received: 17 February 2016
Revised: 03 May 2016
Accepted: 06 May 2016
Published: 23 June 2016
Issue date: August 2016

Copyright

© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2013CB934103), the National Natural Science Fund for Distinguished Young Scholars (No. 51425204), the National Natural Science Foundation of China (Nos. 51521001 and 51502227), the China Postdoctoral Science Foundation (No. 2015T80845), and the Fundamental Research Funds for the Central Universities (WUT: Nos. 2014-Ⅳ-062, 2014-Ⅳ-147, 2014-YB-002, and 2016Ⅲ005).

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