Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation

Amrita De Adhikari, Santosh K. Tiwari, SungKyu Ha, Ganesh Chandra Nayak

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Titania decorated RGO/CNT hybrid electrode material was prepared for supercapacitor (SCs) application through facile hydrothermal approach. Combined act of 1D CNTs and 2D RGO assists the uniform in-situ growth of titania towards high surface area mesoporous self-assembled interconnected morphology which is confirmed from FESEM and BET surface area analysis. This interconnected porous network like structure can efficiently allow the better mass transport and decreased contact resistance towards high electrochemical utilization. Electrochemical measurements revealed the superior performance of hybrid nanocomposite comprising of titania/RGO/CNT (TG 1 C 1 ) which exhibited maximum specific capacitance around 477 F/g at current density 1 A/g. However, this capacitance value was further enhanced up to 537 F/g after 1 hour of UV light irradiation. This enhancement could be ascribed to photo-catalytic effect of TiO 2 and corresponding genesis of photo-excited electrons on TiO 2 surface which further channelized through interconnected RGO and CNT morphology and hence results in improved specific capacitance. These observations were in good agreement with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The hybrid nanocomposite also showed satisfying energy density and power density. It was also found that prepared hybrid nanocomposites were stable up to 2000 cycles with maximum specific capacitance retention of 92% of initial value.

Original languageEnglish
Pages (from-to)421-428
Number of pages8
JournalVacuum
Volume160
DOIs
StatePublished - 2019 Feb 1

Fingerprint

Nanocomposites
nanocomposites
Capacitance
capacitance
carbon nanotubes
Irradiation
irradiation
Titanium
titanium
Titania
electrochemical capacitors
Contact resistance
electrode materials
contact resistance
Electrochemical impedance spectroscopy
Ultraviolet radiation
Cyclic voltammetry
radiant flux density
Current density
Mass transfer

Keywords

  • Energy storage
  • RGO-CNT hybrid
  • Specific capacitance
  • Titania

Cite this

De Adhikari, Amrita ; Tiwari, Santosh K. ; Ha, SungKyu ; Nayak, Ganesh Chandra. / Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation In: Vacuum. 2019 ; Vol. 160. pp. 421-428.
@article{b4d2501e157a4478886c7a93de4ae705,
title = "Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation",
abstract = "Titania decorated RGO/CNT hybrid electrode material was prepared for supercapacitor (SCs) application through facile hydrothermal approach. Combined act of 1D CNTs and 2D RGO assists the uniform in-situ growth of titania towards high surface area mesoporous self-assembled interconnected morphology which is confirmed from FESEM and BET surface area analysis. This interconnected porous network like structure can efficiently allow the better mass transport and decreased contact resistance towards high electrochemical utilization. Electrochemical measurements revealed the superior performance of hybrid nanocomposite comprising of titania/RGO/CNT (TG 1 C 1 ) which exhibited maximum specific capacitance around 477 F/g at current density 1 A/g. However, this capacitance value was further enhanced up to 537 F/g after 1 hour of UV light irradiation. This enhancement could be ascribed to photo-catalytic effect of TiO 2 and corresponding genesis of photo-excited electrons on TiO 2 surface which further channelized through interconnected RGO and CNT morphology and hence results in improved specific capacitance. These observations were in good agreement with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The hybrid nanocomposite also showed satisfying energy density and power density. It was also found that prepared hybrid nanocomposites were stable up to 2000 cycles with maximum specific capacitance retention of 92{\%} of initial value.",
keywords = "Energy storage, RGO-CNT hybrid, Specific capacitance, Titania",
author = "{De Adhikari}, Amrita and Tiwari, {Santosh K.} and SungKyu Ha and Nayak, {Ganesh Chandra}",
year = "2019",
month = "2",
day = "1",
doi = "10.1016/j.vacuum.2018.11.052",
language = "English",
volume = "160",
pages = "421--428",
journal = "Vacuum",
issn = "0042-207X",

}

Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation . / De Adhikari, Amrita; Tiwari, Santosh K.; Ha, SungKyu; Nayak, Ganesh Chandra.

In: Vacuum, Vol. 160, 01.02.2019, p. 421-428.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation

AU - De Adhikari, Amrita

AU - Tiwari, Santosh K.

AU - Ha, SungKyu

AU - Nayak, Ganesh Chandra

PY - 2019/2/1

Y1 - 2019/2/1

N2 - Titania decorated RGO/CNT hybrid electrode material was prepared for supercapacitor (SCs) application through facile hydrothermal approach. Combined act of 1D CNTs and 2D RGO assists the uniform in-situ growth of titania towards high surface area mesoporous self-assembled interconnected morphology which is confirmed from FESEM and BET surface area analysis. This interconnected porous network like structure can efficiently allow the better mass transport and decreased contact resistance towards high electrochemical utilization. Electrochemical measurements revealed the superior performance of hybrid nanocomposite comprising of titania/RGO/CNT (TG 1 C 1 ) which exhibited maximum specific capacitance around 477 F/g at current density 1 A/g. However, this capacitance value was further enhanced up to 537 F/g after 1 hour of UV light irradiation. This enhancement could be ascribed to photo-catalytic effect of TiO 2 and corresponding genesis of photo-excited electrons on TiO 2 surface which further channelized through interconnected RGO and CNT morphology and hence results in improved specific capacitance. These observations were in good agreement with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The hybrid nanocomposite also showed satisfying energy density and power density. It was also found that prepared hybrid nanocomposites were stable up to 2000 cycles with maximum specific capacitance retention of 92% of initial value.

AB - Titania decorated RGO/CNT hybrid electrode material was prepared for supercapacitor (SCs) application through facile hydrothermal approach. Combined act of 1D CNTs and 2D RGO assists the uniform in-situ growth of titania towards high surface area mesoporous self-assembled interconnected morphology which is confirmed from FESEM and BET surface area analysis. This interconnected porous network like structure can efficiently allow the better mass transport and decreased contact resistance towards high electrochemical utilization. Electrochemical measurements revealed the superior performance of hybrid nanocomposite comprising of titania/RGO/CNT (TG 1 C 1 ) which exhibited maximum specific capacitance around 477 F/g at current density 1 A/g. However, this capacitance value was further enhanced up to 537 F/g after 1 hour of UV light irradiation. This enhancement could be ascribed to photo-catalytic effect of TiO 2 and corresponding genesis of photo-excited electrons on TiO 2 surface which further channelized through interconnected RGO and CNT morphology and hence results in improved specific capacitance. These observations were in good agreement with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The hybrid nanocomposite also showed satisfying energy density and power density. It was also found that prepared hybrid nanocomposites were stable up to 2000 cycles with maximum specific capacitance retention of 92% of initial value.

KW - Energy storage

KW - RGO-CNT hybrid

KW - Specific capacitance

KW - Titania

UR - http://www.scopus.com/inward/record.url?scp=85057576189&partnerID=8YFLogxK

U2 - 10.1016/j.vacuum.2018.11.052

DO - 10.1016/j.vacuum.2018.11.052

M3 - Article

VL - 160

SP - 421

EP - 428

JO - Vacuum

JF - Vacuum

SN - 0042-207X

ER -