Porous carbon nanotube/graphene composites for high-performance supercapacitors

Jing Li; Jie Tang; Jinshi Yuan; Kun Zhang; Xiaoliang Yu; Yige Sun; Han Zhang; Lu Chang Qin

doi:10.1016/j.cplett.2017.12.052

Porous carbon nanotube/graphene composites for high-performance supercapacitors

Jing Li
, Jie Tang
, Jinshi Yuan
, Kun Zhang
, Xiaoliang Yu
, Yige Sun
, Han Zhang
, Lu Chang Qin

Research output: Journal article publication › Journal article › Academic research › peer-review

42 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) are an effective spacer to prevent the re-stacking of graphene layers. However, the aggregation of CNTs always reduces the specific surface area of resulting CNT/graphene composites. Meanwhile, different pores always have different contributions to the specific capacitance. In this study, CNT/graphene composites with different porous structures are synthesized by co-reduction of oxidized CNTs and graphene oxide with different mixing ratios. With an optimized CNT content of 20%, the CNT/graphene composite shows 206 F g⁻¹ in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. It is found that pores larger than twice the size of electrolyte ions can make greater contributions to the specific capacitance.

Original language	English
Pages (from-to)	60-65
Number of pages	6
Journal	Chemical Physics Letters
Volume	693
DOIs	https://doi.org/10.1016/j.cplett.2017.12.052
Publication status	Published - Feb 2018
Externally published	Yes

Keywords

Carbon nanotube
Graphene
Pore structure
Supercapacitor

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

More information

10.1016/j.cplett.2017.12.052

Cite this

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title = "Porous carbon nanotube/graphene composites for high-performance supercapacitors",

abstract = "Carbon nanotubes (CNTs) are an effective spacer to prevent the re-stacking of graphene layers. However, the aggregation of CNTs always reduces the specific surface area of resulting CNT/graphene composites. Meanwhile, different pores always have different contributions to the specific capacitance. In this study, CNT/graphene composites with different porous structures are synthesized by co-reduction of oxidized CNTs and graphene oxide with different mixing ratios. With an optimized CNT content of 20\%, the CNT/graphene composite shows 206 F g−1 in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. It is found that pores larger than twice the size of electrolyte ions can make greater contributions to the specific capacitance.",

keywords = "Carbon nanotube, Graphene, Pore structure, Supercapacitor",

author = "Jing Li and Jie Tang and Jinshi Yuan and Kun Zhang and Xiaoliang Yu and Yige Sun and Han Zhang and Qin, \{Lu Chang\}",

note = "Funding Information: This work is financially supported by the JST ALCA program . A part of this work is supported by NIMS Microstructural Characterization Platform as a program of {\textquoteleft}Nanotechnology Platform{\textquoteright} of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan. Publisher Copyright: {\textcopyright} 2017 Elsevier B.V. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

year = "2018",

month = feb,

doi = "10.1016/j.cplett.2017.12.052",

language = "English",

volume = "693",

pages = "60--65",

journal = "Chemical Physics Letters",

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AU - Li, Jing

AU - Tang, Jie

AU - Yuan, Jinshi

AU - Zhang, Kun

AU - Yu, Xiaoliang

AU - Sun, Yige

AU - Zhang, Han

AU - Qin, Lu Chang

N1 - Funding Information: This work is financially supported by the JST ALCA program . A part of this work is supported by NIMS Microstructural Characterization Platform as a program of ‘Nanotechnology Platform’ of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan. Publisher Copyright: © 2017 Elsevier B.V. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2018/2

Y1 - 2018/2

N2 - Carbon nanotubes (CNTs) are an effective spacer to prevent the re-stacking of graphene layers. However, the aggregation of CNTs always reduces the specific surface area of resulting CNT/graphene composites. Meanwhile, different pores always have different contributions to the specific capacitance. In this study, CNT/graphene composites with different porous structures are synthesized by co-reduction of oxidized CNTs and graphene oxide with different mixing ratios. With an optimized CNT content of 20%, the CNT/graphene composite shows 206 F g−1 in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. It is found that pores larger than twice the size of electrolyte ions can make greater contributions to the specific capacitance.

AB - Carbon nanotubes (CNTs) are an effective spacer to prevent the re-stacking of graphene layers. However, the aggregation of CNTs always reduces the specific surface area of resulting CNT/graphene composites. Meanwhile, different pores always have different contributions to the specific capacitance. In this study, CNT/graphene composites with different porous structures are synthesized by co-reduction of oxidized CNTs and graphene oxide with different mixing ratios. With an optimized CNT content of 20%, the CNT/graphene composite shows 206 F g−1 in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. It is found that pores larger than twice the size of electrolyte ions can make greater contributions to the specific capacitance.

KW - Carbon nanotube

KW - Graphene

KW - Pore structure

KW - Supercapacitor

UR - https://www.scopus.com/pages/publications/85040200143

U2 - 10.1016/j.cplett.2017.12.052

DO - 10.1016/j.cplett.2017.12.052

M3 - Journal article

AN - SCOPUS:85040200143

SN - 0009-2614

VL - 693

SP - 60

EP - 65

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Porous carbon nanotube/graphene composites for high-performance supercapacitors

Abstract

Keywords

ASJC Scopus subject areas

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