High performance supercapattery with rGO/TiO 2 nanocomposites anode and activated carbon cathode

Ivy Heng, Foo Wah Low, Chin Wei Lai, Joon Ching Juan, Nowshad Amin, Sieh Kiong Tiong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO 2 )was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5%, 10%, 20%, and 30% were loaded with TiO 2 . It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO 2 play a crucial role in synergistic effect which facilitate electron transfer movement and reduce the volume changes during a charge-discharge cycle process. Based on the results obtained, an optimum of 10 wt % GO loading with TiO 2 nanocrystals revealed that electrochemical performance achieved the highest specific capacity of 116.70 mAh/g with 0.2 A g −1 among samples. This result inferred that high efficiency of ion diffusion was obtained with low charge transfer resistance between TiO 2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10% rGO/TiO 2 nanocomposites as anode while activated carbon as cathode. The result obtained a superior energy density of 54.37 Wh kg −1 at power density of 420.48 W kg −1 . Additionally, the specific capacity still remained at 92% for 3000 charging-discharging cycles under a current density of 1 A g −1 ; hence, good life cycle stability, high specific capacity and low charge transfer resistance of rGO/TiO 2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.

Original languageEnglish
Pages (from-to)13-24
Number of pages12
JournalJournal of Alloys and Compounds
Volume796
DOIs
Publication statusPublished - 5 Aug 2019
Externally publishedYes

Fingerprint

Activated carbon
Nanocrystals
Charge transfer
Nanocomposites
Anodes
Cathodes
Graphite
Hybrid materials
Titanium dioxide
Graphene
Life cycle
Current density
Ions
Electrodes
Oxides
Electrons
titanium dioxide

Keywords

  • Hydrothermal method
  • rGO/TiO
  • Supercapacitor
  • Supercapattery

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

High performance supercapattery with rGO/TiO 2 nanocomposites anode and activated carbon cathode . / Heng, Ivy; Low, Foo Wah; Lai, Chin Wei; Juan, Joon Ching; Amin, Nowshad; Tiong, Sieh Kiong.

In: Journal of Alloys and Compounds, Vol. 796, 05.08.2019, p. 13-24.

Research output: Contribution to journalArticle

Heng, Ivy ; Low, Foo Wah ; Lai, Chin Wei ; Juan, Joon Ching ; Amin, Nowshad ; Tiong, Sieh Kiong. / High performance supercapattery with rGO/TiO 2 nanocomposites anode and activated carbon cathode In: Journal of Alloys and Compounds. 2019 ; Vol. 796. pp. 13-24.
@article{343ab06eaebb4c229124faf0056b6312,
title = "High performance supercapattery with rGO/TiO 2 nanocomposites anode and activated carbon cathode",
abstract = "A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO 2 )was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5{\%}, 10{\%}, 20{\%}, and 30{\%} were loaded with TiO 2 . It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO 2 play a crucial role in synergistic effect which facilitate electron transfer movement and reduce the volume changes during a charge-discharge cycle process. Based on the results obtained, an optimum of 10 wt {\%} GO loading with TiO 2 nanocrystals revealed that electrochemical performance achieved the highest specific capacity of 116.70 mAh/g with 0.2 A g −1 among samples. This result inferred that high efficiency of ion diffusion was obtained with low charge transfer resistance between TiO 2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10{\%} rGO/TiO 2 nanocomposites as anode while activated carbon as cathode. The result obtained a superior energy density of 54.37 Wh kg −1 at power density of 420.48 W kg −1 . Additionally, the specific capacity still remained at 92{\%} for 3000 charging-discharging cycles under a current density of 1 A g −1 ; hence, good life cycle stability, high specific capacity and low charge transfer resistance of rGO/TiO 2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.",
keywords = "Hydrothermal method, rGO/TiO, Supercapacitor, Supercapattery",
author = "Ivy Heng and Low, {Foo Wah} and Lai, {Chin Wei} and Juan, {Joon Ching} and Nowshad Amin and Tiong, {Sieh Kiong}",
year = "2019",
month = "8",
day = "5",
doi = "10.1016/j.jallcom.2019.04.347",
language = "English",
volume = "796",
pages = "13--24",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - High performance supercapattery with rGO/TiO 2 nanocomposites anode and activated carbon cathode

AU - Heng, Ivy

AU - Low, Foo Wah

AU - Lai, Chin Wei

AU - Juan, Joon Ching

AU - Amin, Nowshad

AU - Tiong, Sieh Kiong

PY - 2019/8/5

Y1 - 2019/8/5

N2 - A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO 2 )was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5%, 10%, 20%, and 30% were loaded with TiO 2 . It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO 2 play a crucial role in synergistic effect which facilitate electron transfer movement and reduce the volume changes during a charge-discharge cycle process. Based on the results obtained, an optimum of 10 wt % GO loading with TiO 2 nanocrystals revealed that electrochemical performance achieved the highest specific capacity of 116.70 mAh/g with 0.2 A g −1 among samples. This result inferred that high efficiency of ion diffusion was obtained with low charge transfer resistance between TiO 2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10% rGO/TiO 2 nanocomposites as anode while activated carbon as cathode. The result obtained a superior energy density of 54.37 Wh kg −1 at power density of 420.48 W kg −1 . Additionally, the specific capacity still remained at 92% for 3000 charging-discharging cycles under a current density of 1 A g −1 ; hence, good life cycle stability, high specific capacity and low charge transfer resistance of rGO/TiO 2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.

AB - A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO 2 )was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5%, 10%, 20%, and 30% were loaded with TiO 2 . It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO 2 play a crucial role in synergistic effect which facilitate electron transfer movement and reduce the volume changes during a charge-discharge cycle process. Based on the results obtained, an optimum of 10 wt % GO loading with TiO 2 nanocrystals revealed that electrochemical performance achieved the highest specific capacity of 116.70 mAh/g with 0.2 A g −1 among samples. This result inferred that high efficiency of ion diffusion was obtained with low charge transfer resistance between TiO 2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10% rGO/TiO 2 nanocomposites as anode while activated carbon as cathode. The result obtained a superior energy density of 54.37 Wh kg −1 at power density of 420.48 W kg −1 . Additionally, the specific capacity still remained at 92% for 3000 charging-discharging cycles under a current density of 1 A g −1 ; hence, good life cycle stability, high specific capacity and low charge transfer resistance of rGO/TiO 2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.

KW - Hydrothermal method

KW - rGO/TiO

KW - Supercapacitor

KW - Supercapattery

UR - http://www.scopus.com/inward/record.url?scp=85065389462&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065389462&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2019.04.347

DO - 10.1016/j.jallcom.2019.04.347

M3 - Article

AN - SCOPUS:85065389462

VL - 796

SP - 13

EP - 24

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -