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Free-standing composite hydrogel films for superior volumetric capacitance

Journal Article


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Abstract


  • High volumetric capacitance is vital for the development of wearable and portable energy storage devices. We herein introduce a novel simple route for the fabrication of a highly porous, binder-free and free-standing polyaniline/reduced graphene oxide composite hydrogel (PANi/graphene hydrogel) as an electrode with a packing density of 1.02 g cm-3. PANi played critical roles in gelation, which include reduction, crosslinking, creation of pseudocapacitance and as a spacer preventing graphene sheets from stacking. The composite hydrogel film delivered a volumetric capacitance of 225.42 F cm-3 with a two-electrode supercapacitor configuration, which was enhanced to 592.96 F cm-3 in a redox-active electrolyte containing hydroquinone. This new strategy will open a new area for using conducting polymer derivatives in the development of flexible graphene electrodes towards many applications such as batteries, sensors and catalysis.

Authors


  •   Moussa, Mahmoud (external author)
  •   Zhao, Zhiheng (external author)
  •   El-Kady, Maher F. (external author)
  •   Liu, Hua K.
  •   Michelmore, Andrew (external author)
  •   Kawashima, Nobuyuki (external author)
  •   Majewski, Peter (external author)
  •   Ma, Jun (external author)

Publication Date


  • 2015

Citation


  • Moussa, M., Zhao, Z., El-Kady, M. F., Liu, H., Michelmore, A., Kawashima, N., Majewski, P. & Ma, J. (2015). Free-standing composite hydrogel films for superior volumetric capacitance. Journal of Materials Chemistry A, 3 (30), 15668-15674.

Scopus Eid


  • 2-s2.0-84937468454

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2546&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1544

Number Of Pages


  • 6

Start Page


  • 15668

End Page


  • 15674

Volume


  • 3

Issue


  • 30

Abstract


  • High volumetric capacitance is vital for the development of wearable and portable energy storage devices. We herein introduce a novel simple route for the fabrication of a highly porous, binder-free and free-standing polyaniline/reduced graphene oxide composite hydrogel (PANi/graphene hydrogel) as an electrode with a packing density of 1.02 g cm-3. PANi played critical roles in gelation, which include reduction, crosslinking, creation of pseudocapacitance and as a spacer preventing graphene sheets from stacking. The composite hydrogel film delivered a volumetric capacitance of 225.42 F cm-3 with a two-electrode supercapacitor configuration, which was enhanced to 592.96 F cm-3 in a redox-active electrolyte containing hydroquinone. This new strategy will open a new area for using conducting polymer derivatives in the development of flexible graphene electrodes towards many applications such as batteries, sensors and catalysis.

Authors


  •   Moussa, Mahmoud (external author)
  •   Zhao, Zhiheng (external author)
  •   El-Kady, Maher F. (external author)
  •   Liu, Hua K.
  •   Michelmore, Andrew (external author)
  •   Kawashima, Nobuyuki (external author)
  •   Majewski, Peter (external author)
  •   Ma, Jun (external author)

Publication Date


  • 2015

Citation


  • Moussa, M., Zhao, Z., El-Kady, M. F., Liu, H., Michelmore, A., Kawashima, N., Majewski, P. & Ma, J. (2015). Free-standing composite hydrogel films for superior volumetric capacitance. Journal of Materials Chemistry A, 3 (30), 15668-15674.

Scopus Eid


  • 2-s2.0-84937468454

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2546&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1544

Number Of Pages


  • 6

Start Page


  • 15668

End Page


  • 15674

Volume


  • 3

Issue


  • 30