Skip to main content

Synthesis of Mn3O4-encapsulated graphene sheet nanocomposites via a facile, fast microwave hydrothermal method and their supercapacitive behaviour

Journal Article


Download full-text (Open Access)

Abstract


  • Well-crystallized Mn3O4-anchored reduced graphene oxide (rGO) nanocomposites have been successfully

    synthesized via a facile, effective, energy-saving, and scalable microwave hydrothermal technique

    for potential application as supercapacitor material. Integrating these nanostructures resulted in a strong

    synergistic effect between the two materials, consequently leading to a hybrid composite with higher

    specific capacitance compared to the bare Mn3O4 nanoparticles. The results from different sorts of characterization

    indicate that the Mn3O4 particles were deposited and anchored on graphene sheets. The

    capacitance value of the rGO(31.6%)–Mn3O4 nanocomposite reached 153 F/g, much higher than that of

    the bare Mn3O4 (87 F/g) at a scan rate of 5 mV/s in the potential range from

    −0.1 V to 0.8 V. More importantly, a 200% increase in capacitance was observed for the nanocomposite with cycling at 10 mV/s due

    to electrochemical activation and the oxidization of Mn(II,III) to Mn(IV) during cycling, as verified by Xray

    photoelectron spectroscopy. There is no observable capacitance fading up to 1000 cycles. The facile

    synthesis method and good electrochemical properties indicate that the nanocomposite could be an

    electrode candidate for supercapacitors.

Publication Date


  • 2013

Citation


  • Li, L., Seng, K. Hau., Chen, Z., Liu, H. K., Nevirkovets, I. P. & Guo, Z. (2013). Synthesis of Mn3O4-encapsulated graphene sheet nanocomposites via a facile, fast microwave hydrothermal method and their supercapacitive behaviour. Electrochimica Acta, 87 801-808.

Scopus Eid


  • 2-s2.0-84870318814

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1502&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/497

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 801

End Page


  • 808

Volume


  • 87

Place Of Publication


  • United Kingdom

Abstract


  • Well-crystallized Mn3O4-anchored reduced graphene oxide (rGO) nanocomposites have been successfully

    synthesized via a facile, effective, energy-saving, and scalable microwave hydrothermal technique

    for potential application as supercapacitor material. Integrating these nanostructures resulted in a strong

    synergistic effect between the two materials, consequently leading to a hybrid composite with higher

    specific capacitance compared to the bare Mn3O4 nanoparticles. The results from different sorts of characterization

    indicate that the Mn3O4 particles were deposited and anchored on graphene sheets. The

    capacitance value of the rGO(31.6%)–Mn3O4 nanocomposite reached 153 F/g, much higher than that of

    the bare Mn3O4 (87 F/g) at a scan rate of 5 mV/s in the potential range from

    −0.1 V to 0.8 V. More importantly, a 200% increase in capacitance was observed for the nanocomposite with cycling at 10 mV/s due

    to electrochemical activation and the oxidization of Mn(II,III) to Mn(IV) during cycling, as verified by Xray

    photoelectron spectroscopy. There is no observable capacitance fading up to 1000 cycles. The facile

    synthesis method and good electrochemical properties indicate that the nanocomposite could be an

    electrode candidate for supercapacitors.

Publication Date


  • 2013

Citation


  • Li, L., Seng, K. Hau., Chen, Z., Liu, H. K., Nevirkovets, I. P. & Guo, Z. (2013). Synthesis of Mn3O4-encapsulated graphene sheet nanocomposites via a facile, fast microwave hydrothermal method and their supercapacitive behaviour. Electrochimica Acta, 87 801-808.

Scopus Eid


  • 2-s2.0-84870318814

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1502&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/497

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 801

End Page


  • 808

Volume


  • 87

Place Of Publication


  • United Kingdom