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Edge-fluorinated graphene nanoplatelets as high performance electrodes for dye-sensitized solar cells and lithium ion batteries

Journal Article


Abstract


  • Edge-selectively fluorinated graphene nanoplatelets (FGnPs) are prepared by mechanochemically driven reaction between fluorine gas (20 vol% in argon) and activated carbon species from graphitic C-C bonds unzipped by high-speed stainless steel balls with a high kinetic energy. The fluorination at edges of the unzipped graphene nanoplatelets (GnPs) is confirmed by various analytical techniques while the content of fluorine in FGnPs is determined to be 3.0 and 3.4 at% by X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy, respectively. Because of the large difference in electronegativity between carbon (χ = 2.55) and fluorine (χ = 3.98) and the strong C-F bond, the edge-fluorination of GnPs can provide the maximized charge polarization with an enhanced chemical stability. Thus, electrodes based on the resultant FGnPs demonstrate superb electrochemical performance with excellent stability/cycle life in dye-sensitized solar cells (FF: 71.5%; Jsc: 14.44 mA cm-2; Voc: 970 mV; PCE: 10.01%) and lithium ion batteries (650.3 mA h g-1 at 0.5 C, charge retention of 76.6% after 500 cycles).

Authors


  •   Jeon, In-Yup (external author)
  •   Ju, Myung Jong (external author)
  •   Xu, Jiantie (external author)
  •   Choi, Hyun-Jung (external author)
  •   Seo, Jeong-Min (external author)
  •   Kim, Min-Jung (external author)
  •   Choi, In Taek (external author)
  •   Kim, Hong Mo (external author)
  •   Kim, Jae Cheon (external author)
  •   Lee, Jae-Joon (external author)
  •   Liu, Hua K.
  •   Kim, Hwan Kyu (external author)
  •   Dou, Shi Xue
  •   Dai, Liming (external author)
  •   Baek, Jong-Beom (external author)

Publication Date


  • 2015

Citation


  • Jeon, I., Ju, M., Xu, J., Choi, H., Seo, J., Kim, M., Choi, I., Kim, H., Kim, J., Lee, J., Liu, H. Kun., Kim, H., Dou, S., Dai, L. & Baek, J. (2015). Edge-fluorinated graphene nanoplatelets as high performance electrodes for dye-sensitized solar cells and lithium ion batteries. Advanced Functional Materials, 25 (8), 1170-1179.

Scopus Eid


  • 2-s2.0-85028164901

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1456

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 1170

End Page


  • 1179

Volume


  • 25

Issue


  • 8

Place Of Publication


  • Germany

Abstract


  • Edge-selectively fluorinated graphene nanoplatelets (FGnPs) are prepared by mechanochemically driven reaction between fluorine gas (20 vol% in argon) and activated carbon species from graphitic C-C bonds unzipped by high-speed stainless steel balls with a high kinetic energy. The fluorination at edges of the unzipped graphene nanoplatelets (GnPs) is confirmed by various analytical techniques while the content of fluorine in FGnPs is determined to be 3.0 and 3.4 at% by X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy, respectively. Because of the large difference in electronegativity between carbon (χ = 2.55) and fluorine (χ = 3.98) and the strong C-F bond, the edge-fluorination of GnPs can provide the maximized charge polarization with an enhanced chemical stability. Thus, electrodes based on the resultant FGnPs demonstrate superb electrochemical performance with excellent stability/cycle life in dye-sensitized solar cells (FF: 71.5%; Jsc: 14.44 mA cm-2; Voc: 970 mV; PCE: 10.01%) and lithium ion batteries (650.3 mA h g-1 at 0.5 C, charge retention of 76.6% after 500 cycles).

Authors


  •   Jeon, In-Yup (external author)
  •   Ju, Myung Jong (external author)
  •   Xu, Jiantie (external author)
  •   Choi, Hyun-Jung (external author)
  •   Seo, Jeong-Min (external author)
  •   Kim, Min-Jung (external author)
  •   Choi, In Taek (external author)
  •   Kim, Hong Mo (external author)
  •   Kim, Jae Cheon (external author)
  •   Lee, Jae-Joon (external author)
  •   Liu, Hua K.
  •   Kim, Hwan Kyu (external author)
  •   Dou, Shi Xue
  •   Dai, Liming (external author)
  •   Baek, Jong-Beom (external author)

Publication Date


  • 2015

Citation


  • Jeon, I., Ju, M., Xu, J., Choi, H., Seo, J., Kim, M., Choi, I., Kim, H., Kim, J., Lee, J., Liu, H. Kun., Kim, H., Dou, S., Dai, L. & Baek, J. (2015). Edge-fluorinated graphene nanoplatelets as high performance electrodes for dye-sensitized solar cells and lithium ion batteries. Advanced Functional Materials, 25 (8), 1170-1179.

Scopus Eid


  • 2-s2.0-85028164901

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1456

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 1170

End Page


  • 1179

Volume


  • 25

Issue


  • 8

Place Of Publication


  • Germany