Electrochemical behavior of GNP/CNT porous composite for supercapacitor

[Display omitted] •CNT/Graphene composite with porous and interconnected spherical morphologies.•Structural and electrochemical characterization of all the graphene composite.•Graphene with 1.0 wt% CNT showed a Csp of 143 Fg−1 with 93% cyclic stability. Herein, we systematically demonstrate the syne...

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Published inChemical physics letters Vol. 827; p. 140695
Main Authors Pandit, Niranjan, Singh, Pushpender, Prasad, Suraj, Kumar Keshri, Anup, Czagany, Mate, Hompoth, Szabolcs, Gacsi, Zoltan, Baumli, Peter
Format Journal Article
LanguageEnglish
Published Elsevier B.V 16.09.2023
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Abstract [Display omitted] •CNT/Graphene composite with porous and interconnected spherical morphologies.•Structural and electrochemical characterization of all the graphene composite.•Graphene with 1.0 wt% CNT showed a Csp of 143 Fg−1 with 93% cyclic stability. Herein, we systematically demonstrate the synergistic behavior of GNP/CNT composite as an electrode material. Uniform dispersion of CNTs effectively inhibits the restacking of GNP sheets, resulting in enhanced specific surface area, porosity, and conductivity. Moreover, CNT intercalation provides a porous and interconnected network for electrolyte ion transportation. As a result, GNP composite having 1.0 wt% multi-walled carbon nanotube (MWCNTs) shows specific capacitance up to 143 Fg−1 at 5 mVs−1, an improvement of 150% compared to pristine GNPs. The improved electrochemical performance implies that the proposed composite electrode is a promising candidate for supercapacitor application.
AbstractList [Display omitted] •CNT/Graphene composite with porous and interconnected spherical morphologies.•Structural and electrochemical characterization of all the graphene composite.•Graphene with 1.0 wt% CNT showed a Csp of 143 Fg−1 with 93% cyclic stability. Herein, we systematically demonstrate the synergistic behavior of GNP/CNT composite as an electrode material. Uniform dispersion of CNTs effectively inhibits the restacking of GNP sheets, resulting in enhanced specific surface area, porosity, and conductivity. Moreover, CNT intercalation provides a porous and interconnected network for electrolyte ion transportation. As a result, GNP composite having 1.0 wt% multi-walled carbon nanotube (MWCNTs) shows specific capacitance up to 143 Fg−1 at 5 mVs−1, an improvement of 150% compared to pristine GNPs. The improved electrochemical performance implies that the proposed composite electrode is a promising candidate for supercapacitor application.
ArticleNumber 140695
Author Singh, Pushpender
Kumar Keshri, Anup
Pandit, Niranjan
Prasad, Suraj
Baumli, Peter
Hompoth, Szabolcs
Gacsi, Zoltan
Czagany, Mate
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Keywords Carbon nanotube
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Graphene Nanoplatelets
Porous composite
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SubjectTerms Carbon nanotube
Graphene Nanoplatelets
Porous composite
Supercapacitor
Title Electrochemical behavior of GNP/CNT porous composite for supercapacitor
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