High performance supercapattery with rGO/TiO2 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

Abstract

A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO2)was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5%, 10%, 20%, and 30% were loaded with TiO2. It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO2 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 TiO2 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 TiO2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10% rGO/TiO2 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/TiO2 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 - 05 Aug 2019

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

All Science Journal Classification (ASJC) codes

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

Cite this

Heng, Ivy ; Low, Foo Wah ; Lai, Chin Wei ; Juan, Joon Ching ; Amin, Nowshad ; Tiong, Sieh Kiong. / High performance supercapattery with rGO/TiO2 nanocomposites anode and activated carbon cathode. In: Journal of Alloys and Compounds. 2019 ; Vol. 796. pp. 13-24.
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abstract = "A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO2)was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5{\%}, 10{\%}, 20{\%}, and 30{\%} were loaded with TiO2. It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO2 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 TiO2 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 TiO2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10{\%} rGO/TiO2 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/TiO2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.",
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High performance supercapattery with rGO/TiO2 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

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T1 - High performance supercapattery with rGO/TiO2 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

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AB - A hybrid material of reduced graphene oxide/titanium dioxide (rGO/TiO2)was successfully synthesized by facile hydrothermal technique. A different amount of GO ratios at 5%, 10%, 20%, and 30% were loaded with TiO2. It is a well-known fact that porous structure and crystallinity of resultant rGO/TiO2 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 TiO2 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 TiO2 nanocrystals and rGO. The supercapattery was assembled in a configuration of optimized 10% rGO/TiO2 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/TiO2 nanocomposites electrode suggested that the prepared materials was a promising anode material for supercapattery application.

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