Facile synthesis of graphene-Zn 3 V 2 O 8 nanocomposite as a high performance electrode material for symmetric supercapacitor

Wei Hau Low, Poi Sim Khiew, Siew Shee Lim, Chiu Wee Siong, Chin Hua Chia, Ejikeme Raphael Ezeigwe

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to improve the energy density of the supercapacitor, fabrication of next-generation materials with inimitable morphology and superior electrochemical performance is highly desired. Herein, a novel hybrid electrode material, namely graphene-Zn 3 V 2 O 8 nanocomposites, were successfully prepared via facile solvothermal process followed by thermal annealing treatment. Graphene sheets were synthesised through the eco-friendly liquid phase exfoliation approach with optimised ethanol to water volume ratio (2:3). Optimisations on the weight ratio between the graphene and Zn 3 V 2 O 8 were performed to determine the synergistic effect between them. The morphogenesis of the graphene-Zn 3 V 2 O 8 nanohybrid manifests “sheet on sheet” nanostructures that intertwined with each other to form a 3D network architecture, which provides sufficient electroactive sites and shortens the ions diffusion pathway, leading to eminent electrochemical properties. The electrochemical properties of these materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge tests in 2 M KOH aqueous electrolyte. Among the nanocomposites studied, G-3ZVO (weight ratio of 1:3) exhibited a specific capacitance of 564 Fg -1 at 0.8 Ag -1 , outstanding rate capability and good cycling stability even after 5000 cycles. Furthermore, this symmetrical supercapacitor delivered an impressive energy density of 78 Wh/kg at power density of 75.5 kW/kg.

Original languageEnglish
Pages (from-to)847-858
Number of pages12
JournalJournal of Alloys and Compounds
Volume784
DOIs
Publication statusPublished - 5 May 2019

Fingerprint

Graphite
Graphene
Nanocomposites
Electrodes
Electrochemical properties
Network architecture
Electrolytes
Cyclic voltammetry
Nanostructures
Ethanol
Capacitance
Annealing
Ions
Fabrication
Supercapacitor
Water
Liquids

Keywords

  • Graphene
  • Graphene-Zn V O
  • Solvothermal
  • Supercapacitor

ASJC Scopus subject areas

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

Cite this

Facile synthesis of graphene-Zn 3 V 2 O 8 nanocomposite as a high performance electrode material for symmetric supercapacitor . / Low, Wei Hau; Khiew, Poi Sim; Lim, Siew Shee; Siong, Chiu Wee; Chia, Chin Hua; Ezeigwe, Ejikeme Raphael.

In: Journal of Alloys and Compounds, Vol. 784, 05.05.2019, p. 847-858.

Research output: Contribution to journalArticle

Low, Wei Hau ; Khiew, Poi Sim ; Lim, Siew Shee ; Siong, Chiu Wee ; Chia, Chin Hua ; Ezeigwe, Ejikeme Raphael. / Facile synthesis of graphene-Zn 3 V 2 O 8 nanocomposite as a high performance electrode material for symmetric supercapacitor In: Journal of Alloys and Compounds. 2019 ; Vol. 784. pp. 847-858.
@article{7fb940518607448ca5583cd3c90f9bee,
title = "Facile synthesis of graphene-Zn 3 V 2 O 8 nanocomposite as a high performance electrode material for symmetric supercapacitor",
abstract = "In order to improve the energy density of the supercapacitor, fabrication of next-generation materials with inimitable morphology and superior electrochemical performance is highly desired. Herein, a novel hybrid electrode material, namely graphene-Zn 3 V 2 O 8 nanocomposites, were successfully prepared via facile solvothermal process followed by thermal annealing treatment. Graphene sheets were synthesised through the eco-friendly liquid phase exfoliation approach with optimised ethanol to water volume ratio (2:3). Optimisations on the weight ratio between the graphene and Zn 3 V 2 O 8 were performed to determine the synergistic effect between them. The morphogenesis of the graphene-Zn 3 V 2 O 8 nanohybrid manifests “sheet on sheet” nanostructures that intertwined with each other to form a 3D network architecture, which provides sufficient electroactive sites and shortens the ions diffusion pathway, leading to eminent electrochemical properties. The electrochemical properties of these materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge tests in 2 M KOH aqueous electrolyte. Among the nanocomposites studied, G-3ZVO (weight ratio of 1:3) exhibited a specific capacitance of 564 Fg -1 at 0.8 Ag -1 , outstanding rate capability and good cycling stability even after 5000 cycles. Furthermore, this symmetrical supercapacitor delivered an impressive energy density of 78 Wh/kg at power density of 75.5 kW/kg.",
keywords = "Graphene, Graphene-Zn V O, Solvothermal, Supercapacitor",
author = "Low, {Wei Hau} and Khiew, {Poi Sim} and Lim, {Siew Shee} and Siong, {Chiu Wee} and Chia, {Chin Hua} and Ezeigwe, {Ejikeme Raphael}",
year = "2019",
month = "5",
day = "5",
doi = "10.1016/j.jallcom.2019.01.137",
language = "English",
volume = "784",
pages = "847--858",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Facile synthesis of graphene-Zn 3 V 2 O 8 nanocomposite as a high performance electrode material for symmetric supercapacitor

AU - Low, Wei Hau

AU - Khiew, Poi Sim

AU - Lim, Siew Shee

AU - Siong, Chiu Wee

AU - Chia, Chin Hua

AU - Ezeigwe, Ejikeme Raphael

PY - 2019/5/5

Y1 - 2019/5/5

N2 - In order to improve the energy density of the supercapacitor, fabrication of next-generation materials with inimitable morphology and superior electrochemical performance is highly desired. Herein, a novel hybrid electrode material, namely graphene-Zn 3 V 2 O 8 nanocomposites, were successfully prepared via facile solvothermal process followed by thermal annealing treatment. Graphene sheets were synthesised through the eco-friendly liquid phase exfoliation approach with optimised ethanol to water volume ratio (2:3). Optimisations on the weight ratio between the graphene and Zn 3 V 2 O 8 were performed to determine the synergistic effect between them. The morphogenesis of the graphene-Zn 3 V 2 O 8 nanohybrid manifests “sheet on sheet” nanostructures that intertwined with each other to form a 3D network architecture, which provides sufficient electroactive sites and shortens the ions diffusion pathway, leading to eminent electrochemical properties. The electrochemical properties of these materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge tests in 2 M KOH aqueous electrolyte. Among the nanocomposites studied, G-3ZVO (weight ratio of 1:3) exhibited a specific capacitance of 564 Fg -1 at 0.8 Ag -1 , outstanding rate capability and good cycling stability even after 5000 cycles. Furthermore, this symmetrical supercapacitor delivered an impressive energy density of 78 Wh/kg at power density of 75.5 kW/kg.

AB - In order to improve the energy density of the supercapacitor, fabrication of next-generation materials with inimitable morphology and superior electrochemical performance is highly desired. Herein, a novel hybrid electrode material, namely graphene-Zn 3 V 2 O 8 nanocomposites, were successfully prepared via facile solvothermal process followed by thermal annealing treatment. Graphene sheets were synthesised through the eco-friendly liquid phase exfoliation approach with optimised ethanol to water volume ratio (2:3). Optimisations on the weight ratio between the graphene and Zn 3 V 2 O 8 were performed to determine the synergistic effect between them. The morphogenesis of the graphene-Zn 3 V 2 O 8 nanohybrid manifests “sheet on sheet” nanostructures that intertwined with each other to form a 3D network architecture, which provides sufficient electroactive sites and shortens the ions diffusion pathway, leading to eminent electrochemical properties. The electrochemical properties of these materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge tests in 2 M KOH aqueous electrolyte. Among the nanocomposites studied, G-3ZVO (weight ratio of 1:3) exhibited a specific capacitance of 564 Fg -1 at 0.8 Ag -1 , outstanding rate capability and good cycling stability even after 5000 cycles. Furthermore, this symmetrical supercapacitor delivered an impressive energy density of 78 Wh/kg at power density of 75.5 kW/kg.

KW - Graphene

KW - Graphene-Zn V O

KW - Solvothermal

KW - Supercapacitor

UR - http://www.scopus.com/inward/record.url?scp=85060252119&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060252119&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2019.01.137

DO - 10.1016/j.jallcom.2019.01.137

M3 - Article

AN - SCOPUS:85060252119

VL - 784

SP - 847

EP - 858

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -