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Facile synthesis of a reduced graphene oxide wrapped porous NiCo2O4 composite with superior performance as an electrode material for supercapacitors

Journal Article


Abstract


  • Even though NiCo2O4 is considered to be one of the most promising materials for supercapacitor applications,

    its unsatisfactory rate performance and cycling stability, due to inherently low electrical conductivity, have

    limited its further growth as a supercapacitor electrode. The present study tries to profitably exploit

    reduced graphene oxide (rGO) nanosheets as a conducting unit to enhance the electronic conductivity, by

    a simple hydrothermal technique assisted by ammonia hydroxide, to improve the overall electrochemical

    performance of NiCo2O4 in supercapacitors. The as-prepared NiCo2O4–rGO nanocomposite consists of

    NiCo2O4 hexagons wrapped in conducting rGO sheets, which ensure a short ion diffusion distance,

    percolating electron conducting pathways, and stable structural integrity. Such a feasible design provides

    good synergism between the rGO and the NiCo2O4, resulting in better electrochemical performance. As

    a result, this nanocomposite displays impressive overall electrochemical performance, in aspects such as

    promising capacitance (1185 F g1 at a current density of 2 A g1

    ) and remarkable cycling stability (98%

    capacitance retention after 10 000 charge–discharge cycles at 2 A g1

    ). This facile method could be

    beneficial for preparing similar materials that require high electronic conductivity

Publication Date


  • 2017

Citation


  • Al-Rubaye, S., Rajagopalan, R., Dou, S. Xue. & Cheng, Z. (2017). Facile synthesis of a reduced graphene oxide wrapped porous NiCo2O4 composite with superior performance as an electrode material for supercapacitors. Journal of Materials Chemistry A, 5 (36), 18989-18997.

Scopus Eid


  • 2-s2.0-85029659545

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2745

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 18989

End Page


  • 18997

Volume


  • 5

Issue


  • 36

Place Of Publication


  • United Kingdom

Abstract


  • Even though NiCo2O4 is considered to be one of the most promising materials for supercapacitor applications,

    its unsatisfactory rate performance and cycling stability, due to inherently low electrical conductivity, have

    limited its further growth as a supercapacitor electrode. The present study tries to profitably exploit

    reduced graphene oxide (rGO) nanosheets as a conducting unit to enhance the electronic conductivity, by

    a simple hydrothermal technique assisted by ammonia hydroxide, to improve the overall electrochemical

    performance of NiCo2O4 in supercapacitors. The as-prepared NiCo2O4–rGO nanocomposite consists of

    NiCo2O4 hexagons wrapped in conducting rGO sheets, which ensure a short ion diffusion distance,

    percolating electron conducting pathways, and stable structural integrity. Such a feasible design provides

    good synergism between the rGO and the NiCo2O4, resulting in better electrochemical performance. As

    a result, this nanocomposite displays impressive overall electrochemical performance, in aspects such as

    promising capacitance (1185 F g1 at a current density of 2 A g1

    ) and remarkable cycling stability (98%

    capacitance retention after 10 000 charge–discharge cycles at 2 A g1

    ). This facile method could be

    beneficial for preparing similar materials that require high electronic conductivity

Publication Date


  • 2017

Citation


  • Al-Rubaye, S., Rajagopalan, R., Dou, S. Xue. & Cheng, Z. (2017). Facile synthesis of a reduced graphene oxide wrapped porous NiCo2O4 composite with superior performance as an electrode material for supercapacitors. Journal of Materials Chemistry A, 5 (36), 18989-18997.

Scopus Eid


  • 2-s2.0-85029659545

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2745

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 18989

End Page


  • 18997

Volume


  • 5

Issue


  • 36

Place Of Publication


  • United Kingdom