High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes

Byungwoo Kim, Haegeun Chung, Woong Kim

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

We demonstrate the high performance of supercapacitors fabricated with vertically aligned carbon nanotubes and nonaqueous electrolytes such as ionic liquids and conventional organic electrolytes. Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg 1, 987kWkg 1 and 27Whkg 1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg 1) and energy density (53Whkg 1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.

Original languageEnglish
Article number155401
JournalNanotechnology
Volume23
Issue number15
DOIs
Publication statusPublished - 2012 Apr 20

Fingerprint

Carbon Nanotubes
Ionic Liquids
Electrolytes
Carbon nanotubes
Ionic liquids
Capacitance
Electrochemical oxidation
Ion Transport
Relaxation time
Energy storage
Ions
Equipment and Supplies
Supercapacitor
Electric potential

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes. / Kim, Byungwoo; Chung, Haegeun; Kim, Woong.

In: Nanotechnology, Vol. 23, No. 15, 155401, 20.04.2012.

Research output: Contribution to journalArticle

@article{e2a124b46f494f10a07cfb25982fc699,
title = "High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes",
abstract = "We demonstrate the high performance of supercapacitors fabricated with vertically aligned carbon nanotubes and nonaqueous electrolytes such as ionic liquids and conventional organic electrolytes. Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg 1, 987kWkg 1 and 27Whkg 1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg 1) and energy density (53Whkg 1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.",
author = "Byungwoo Kim and Haegeun Chung and Woong Kim",
year = "2012",
month = "4",
day = "20",
doi = "10.1088/0957-4484/23/15/155401",
language = "English",
volume = "23",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "15",

}

TY - JOUR

T1 - High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes

AU - Kim, Byungwoo

AU - Chung, Haegeun

AU - Kim, Woong

PY - 2012/4/20

Y1 - 2012/4/20

N2 - We demonstrate the high performance of supercapacitors fabricated with vertically aligned carbon nanotubes and nonaqueous electrolytes such as ionic liquids and conventional organic electrolytes. Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg 1, 987kWkg 1 and 27Whkg 1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg 1) and energy density (53Whkg 1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.

AB - We demonstrate the high performance of supercapacitors fabricated with vertically aligned carbon nanotubes and nonaqueous electrolytes such as ionic liquids and conventional organic electrolytes. Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg 1, 987kWkg 1 and 27Whkg 1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg 1) and energy density (53Whkg 1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.

UR - http://www.scopus.com/inward/record.url?scp=84859175911&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859175911&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/23/15/155401

DO - 10.1088/0957-4484/23/15/155401

M3 - Article

VL - 23

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 15

M1 - 155401

ER -