Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices
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2016
Authors
Vujković, Milica J.Vidoeski, Bojan A.
Jovanović, Svetlana P.
Bajuk-Bogdanović, Danica
Budimir, Milica D.
Marković, Zoran M.
Pavlović, Vladimir
Todorović-Marković, Biljana
Holclajtner-Antunović, Ivanka
Article (Published version)
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A novel electrochemically exfoliated graphene-molybdophosphoric acid nanohybride (EG-MoPA) was prepared via a simple method. Both scanning electron (SEM) and atomic force microscopy (AFM) results show that MoPA clusters are attached to the surfaces of graphene sheets. By changing the mass ratio of EG-MoPA, the morphology of nanohybrid itself can be significantly modulated, from mostly flat graphene like structure at low amount of MoPA to very uneven, wavy surfaces when MoPA is present in higher concentration. The Raman and Fourier transform infra red (FTIR) spectra in conjunction with electrochemical results indicate that strong interaction exists between the components of nanohybride based on charge transfer and electrostatic interaction of graphene sheets and MoPA. The electrochemical performances are improved by synergetic effect of reversible redox properties of MoPA and the double layer capacitance of a high-surface area of the obtained nanohybrides. The higher current capability ...of EG was achieved by anchoring the small MoPA concentration on the graphene support. The strong bonding of EG with the MoPA prevents acid to dissolve in the electrolyte upon cycling, enabling the stable capacitance behaviour of the low-doped EG sample. The capacitance for the EG doped with the high amount of MoPA was found to be much larger than for EG. However, the obtained capacitance decreases at the beginning of cycling due to the dissolution of excessive amount of surface MoPA, weakly bonded to the graphene support.
Keywords:
exfoliated graphene / polyoxometalates / composite / charge storage devicesSource:
Electrochimica Acta, 2016, 217, 34-46Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- SASPRO - Mobility Programme of Slovak Academy of Sciences: Supportive Fund for Excellent Scientists (EU-609427)
- Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications (RS-172043)
- Lithium-ion batteries and fuel cells - research and development (RS-45014)
- Thin films of single wall carbon nanotubes and graphene for electronic application (RS-172003)
DOI: 10.1016/j.electacta.2016.09.067
ISSN: 0013-4686
WoS: 000385496700005
Scopus: 2-s2.0-84988028740
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Poljoprivredni fakultetTY - JOUR AU - Vujković, Milica J. AU - Vidoeski, Bojan A. AU - Jovanović, Svetlana P. AU - Bajuk-Bogdanović, Danica AU - Budimir, Milica D. AU - Marković, Zoran M. AU - Pavlović, Vladimir AU - Todorović-Marković, Biljana AU - Holclajtner-Antunović, Ivanka PY - 2016 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/4097 AB - A novel electrochemically exfoliated graphene-molybdophosphoric acid nanohybride (EG-MoPA) was prepared via a simple method. Both scanning electron (SEM) and atomic force microscopy (AFM) results show that MoPA clusters are attached to the surfaces of graphene sheets. By changing the mass ratio of EG-MoPA, the morphology of nanohybrid itself can be significantly modulated, from mostly flat graphene like structure at low amount of MoPA to very uneven, wavy surfaces when MoPA is present in higher concentration. The Raman and Fourier transform infra red (FTIR) spectra in conjunction with electrochemical results indicate that strong interaction exists between the components of nanohybride based on charge transfer and electrostatic interaction of graphene sheets and MoPA. The electrochemical performances are improved by synergetic effect of reversible redox properties of MoPA and the double layer capacitance of a high-surface area of the obtained nanohybrides. The higher current capability of EG was achieved by anchoring the small MoPA concentration on the graphene support. The strong bonding of EG with the MoPA prevents acid to dissolve in the electrolyte upon cycling, enabling the stable capacitance behaviour of the low-doped EG sample. The capacitance for the EG doped with the high amount of MoPA was found to be much larger than for EG. However, the obtained capacitance decreases at the beginning of cycling due to the dissolution of excessive amount of surface MoPA, weakly bonded to the graphene support. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices EP - 46 SP - 34 VL - 217 DO - 10.1016/j.electacta.2016.09.067 ER -
@article{ author = "Vujković, Milica J. and Vidoeski, Bojan A. and Jovanović, Svetlana P. and Bajuk-Bogdanović, Danica and Budimir, Milica D. and Marković, Zoran M. and Pavlović, Vladimir and Todorović-Marković, Biljana and Holclajtner-Antunović, Ivanka", year = "2016", abstract = "A novel electrochemically exfoliated graphene-molybdophosphoric acid nanohybride (EG-MoPA) was prepared via a simple method. Both scanning electron (SEM) and atomic force microscopy (AFM) results show that MoPA clusters are attached to the surfaces of graphene sheets. By changing the mass ratio of EG-MoPA, the morphology of nanohybrid itself can be significantly modulated, from mostly flat graphene like structure at low amount of MoPA to very uneven, wavy surfaces when MoPA is present in higher concentration. The Raman and Fourier transform infra red (FTIR) spectra in conjunction with electrochemical results indicate that strong interaction exists between the components of nanohybride based on charge transfer and electrostatic interaction of graphene sheets and MoPA. The electrochemical performances are improved by synergetic effect of reversible redox properties of MoPA and the double layer capacitance of a high-surface area of the obtained nanohybrides. The higher current capability of EG was achieved by anchoring the small MoPA concentration on the graphene support. The strong bonding of EG with the MoPA prevents acid to dissolve in the electrolyte upon cycling, enabling the stable capacitance behaviour of the low-doped EG sample. The capacitance for the EG doped with the high amount of MoPA was found to be much larger than for EG. However, the obtained capacitance decreases at the beginning of cycling due to the dissolution of excessive amount of surface MoPA, weakly bonded to the graphene support.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices", pages = "46-34", volume = "217", doi = "10.1016/j.electacta.2016.09.067" }
Vujković, M. J., Vidoeski, B. A., Jovanović, S. P., Bajuk-Bogdanović, D., Budimir, M. D., Marković, Z. M., Pavlović, V., Todorović-Marković, B.,& Holclajtner-Antunović, I.. (2016). Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 217, 34-46. https://doi.org/10.1016/j.electacta.2016.09.067
Vujković MJ, Vidoeski BA, Jovanović SP, Bajuk-Bogdanović D, Budimir MD, Marković ZM, Pavlović V, Todorović-Marković B, Holclajtner-Antunović I. Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices. in Electrochimica Acta. 2016;217:34-46. doi:10.1016/j.electacta.2016.09.067 .
Vujković, Milica J., Vidoeski, Bojan A., Jovanović, Svetlana P., Bajuk-Bogdanović, Danica, Budimir, Milica D., Marković, Zoran M., Pavlović, Vladimir, Todorović-Marković, Biljana, Holclajtner-Antunović, Ivanka, "Synthesis and characterization of electrochemically exfoliated graphene-molybdophosphate hybrid materials for charge storage devices" in Electrochimica Acta, 217 (2016):34-46, https://doi.org/10.1016/j.electacta.2016.09.067 . .