High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film
In this work, we report the fabrication of a new 3D graphene foam (GF)/carbon nanotube (CNT) hybrid film with high flexibility and robustness as the ideal support for deposition of large amounts of electrochemically active materials per unit area. To demonstrate the concept, we have deposited MnO2 a...
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sg-ntu-dr.10356-981132023-02-28T19:40:50Z High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film Liu, Jilei Zhang, Lili Wu, Hao Bin Lin, Jianyi Shen, Zexiang Lou, Xiong Wen David School of Chemical and Biomedical Engineering School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Organic chemistry::Carbanions In this work, we report the fabrication of a new 3D graphene foam (GF)/carbon nanotube (CNT) hybrid film with high flexibility and robustness as the ideal support for deposition of large amounts of electrochemically active materials per unit area. To demonstrate the concept, we have deposited MnO2 and polypyrrole (Ppy) on the GF/CNT films and successfully fabricated lightweight and flexible asymmetric supercapacitors (ASCs). These ASCs assembled from GF/CNT/MnO2 and GF/CNT/Ppy hybrid films with high loading of electroactive materials in an aqueous electrolyte are able to function with an output voltage of 1.6 V, and deliver high energy/power density (22.8 W h kg−1 at 860 W kg−1 and 2.7 kW kg−1 at 6.2 W h kg−1). The rate performance can be further improved with less loading of electroactive materials (10.3 kW kg−1 at 10.9 W h kg−1). The ASCs demonstrate remarkable cycling stability (capacitance retention of 90.2–83.5% after 10 000 cycles), which is among the best reported for ASCs with both electrodes made of non-carbon electroactive materials. Also the ASCs are able to perfectly retain their electrochemical performance at different bending angles. These ASCs demonstrate great potential as power sources for flexible and lightweight electronic devices. Accepted version 2015-08-27T07:54:19Z 2019-12-06T19:50:43Z 2015-08-27T07:54:19Z 2019-12-06T19:50:43Z 2014 2014 Journal Article Liu, J., Zhang, L., Wu, H. B., Lin, J., Shen, Z., & Lou, X. W. D. (2014). High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film. Energy & Environmental Science, 7(11), 3709-3719. https://hdl.handle.net/10356/98113 http://hdl.handle.net/10220/38532 10.1039/C4EE01475H en Energy & environmental science © 2014 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Energy & Environmental Science, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1039/C4EE01475H]. 29 p. application/pdf |
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DRNTU::Science::Chemistry::Organic chemistry::Carbanions Liu, Jilei Zhang, Lili Wu, Hao Bin Lin, Jianyi Shen, Zexiang Lou, Xiong Wen David High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
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In this work, we report the fabrication of a new 3D graphene foam (GF)/carbon nanotube (CNT) hybrid film with high flexibility and robustness as the ideal support for deposition of large amounts of electrochemically active materials per unit area. To demonstrate the concept, we have deposited MnO2 and polypyrrole (Ppy) on the GF/CNT films and successfully fabricated lightweight and flexible asymmetric supercapacitors (ASCs). These ASCs assembled from GF/CNT/MnO2 and GF/CNT/Ppy hybrid films with high loading of electroactive materials in an aqueous electrolyte are able to function with an output voltage of 1.6 V, and deliver high energy/power density (22.8 W h kg−1 at 860 W kg−1 and 2.7 kW kg−1 at 6.2 W h kg−1). The rate performance can be further improved with less loading of electroactive materials (10.3 kW kg−1 at 10.9 W h kg−1). The ASCs demonstrate remarkable cycling stability (capacitance retention of 90.2–83.5% after 10 000 cycles), which is among the best reported for ASCs with both electrodes made of non-carbon electroactive materials. Also the ASCs are able to perfectly retain their electrochemical performance at different bending angles. These ASCs demonstrate great potential as power sources for flexible and lightweight electronic devices. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Liu, Jilei Zhang, Lili Wu, Hao Bin Lin, Jianyi Shen, Zexiang Lou, Xiong Wen David |
format |
Article |
author |
Liu, Jilei Zhang, Lili Wu, Hao Bin Lin, Jianyi Shen, Zexiang Lou, Xiong Wen David |
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Liu, Jilei |
title |
High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
title_short |
High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
title_full |
High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
title_fullStr |
High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
title_full_unstemmed |
High-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
title_sort |
high-performance flexible asymmetric supercapacitors based on a new graphene foam/carbon nanotube hybrid film |
publishDate |
2015 |
url |
https://hdl.handle.net/10356/98113 http://hdl.handle.net/10220/38532 |
_version_ |
1759857372104228864 |