Research Article

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2016, 9(8): 2510–2519

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https://doi.org/10.1007/s12274-016-1137-3

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

Yanjuan Yang1, Liang He1 (*), Chunjuan Tang1,2, Ping Hu1, Xufeng Hong1, Mengyu Yan1, Yixiao Dong1, Xiaocong Tian1, Qiulong Wei1, and Liqiang Mai1 (*)

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1 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
2 Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, China

Keywords: photolithography,supercapacitors,pyrolysis,microelectromechanicalsystem (MEMS),carbon nanotubes
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  • Abstract
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In the last decade, pyrolyzed-carbon-based composites have attracted muchattention for their applications in micro-supercapacitors. Although variousmethods have been investigated to improve the performance of pyrolyzedcarbons, such as conductivity, energy storage density and cycling performance,effective methods for the integration and mass-production of pyrolyzed-carbonbasedcomposites on a large scale are lacking. Here, we report the developmentof an optimized photolithographic technique for the fine micropatterningof photoresist/chitosan-coated carbon nanotube (CHIT-CNT) composite. Aftersubsequent pyrolysis, the fabricated carbon/CHIT-CNT microelectrode-basedmicro-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-supercapacitorhas a remarkable long-term cyclability, with 99.9% capacitance retention after10,000 cyclic voltammetry cycles. This design and microfabrication process allowthe application of carbon microelectromechanical system (C-MEMS)-basedmicro-supercapacitors due to their high potential for enhancing the mechanicaland 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. Nano Res. 2016, 9(8): 2510–2519 https://doi.org/10.1007/s12274-016-1137-3

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