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A Novel Graphene Oxide Wrapped Na2Fe2(SO4)3/C Cathode Composite for Long Life and High Energy Density Sodium-Ion Batteries

Journal Article


Abstract


  • The cathode materials in the Na-ion battery system are always the key issue obstructing wider application because of their relatively low specific capacity and low energy density. A graphene oxide (GO) wrapped composite, Na2Fe2(SO4)3@C@GO, is fabricated via a simple freeze-drying method. The as-prepared material can deliver a 3.8 V platform with discharge capacity of 107.9 mAh g−1at 0.1 C (1 C = 120 mA g−1) as well as offering capacity retention above 90% at a discharge rate of 0.2 C after 300 cycles. The well-constructed carbon network provides fast electron transfer rates, and thus, higher power density also can be achieved (75.1 mAh g−1at 10 C). The interface contribution of GO and Na2Fe2(SO4)3is recognized and studied via density function theory calculation. The Na storage mechanism is also investigated through in situ synchrotron X-ray diffraction, and pseudocapacitance contributions are also demonstrated. The diffusion coefficient of Na+ions is around 10−12–10−10.8cm2s−1during cycling. The higher working voltage of this composite is mainly ascribed to the larger electronegativity of the element S. The research indicates that this well-constructed composite would be a competitive candidate as a cathode material for Na-ion batteries.

Authors


  •   Chen, Mingzhe (external author)
  •   Cortie, David L.
  •   Hu, Zhe (external author)
  •   Jin, Huile (external author)
  •   Wang, Shun (external author)
  •   Gu, Qinfen (external author)
  •   Hua, Wei-Bo (external author)
  •   Wang, En-Hui (external author)
  •   Lai, Weihong (external author)
  •   Chen, Lingna (external author)
  •   Chou, Shulei
  •   Wang, Xiaolin
  •   Dou, Shi Xue

Publication Date


  • 2018

Citation


  • Chen, M., Cortie, D., Hu, Z., Jin, H., Wang, S., Gu, Q., Hua, W., Wang, E., Lai, W., Chen, L., Chou, S., Wang, X. & Dou, S. (2018). A Novel Graphene Oxide Wrapped Na2Fe2(SO4)3/C Cathode Composite for Long Life and High Energy Density Sodium-Ion Batteries. Advanced Energy Materials, 8 (27), 1800944-1-1800944-11.

Scopus Eid


  • 2-s2.0-85052394080

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3266

Has Global Citation Frequency


Start Page


  • 1800944-1

End Page


  • 1800944-11

Volume


  • 8

Issue


  • 27

Place Of Publication


  • Germany

Abstract


  • The cathode materials in the Na-ion battery system are always the key issue obstructing wider application because of their relatively low specific capacity and low energy density. A graphene oxide (GO) wrapped composite, Na2Fe2(SO4)3@C@GO, is fabricated via a simple freeze-drying method. The as-prepared material can deliver a 3.8 V platform with discharge capacity of 107.9 mAh g−1at 0.1 C (1 C = 120 mA g−1) as well as offering capacity retention above 90% at a discharge rate of 0.2 C after 300 cycles. The well-constructed carbon network provides fast electron transfer rates, and thus, higher power density also can be achieved (75.1 mAh g−1at 10 C). The interface contribution of GO and Na2Fe2(SO4)3is recognized and studied via density function theory calculation. The Na storage mechanism is also investigated through in situ synchrotron X-ray diffraction, and pseudocapacitance contributions are also demonstrated. The diffusion coefficient of Na+ions is around 10−12–10−10.8cm2s−1during cycling. The higher working voltage of this composite is mainly ascribed to the larger electronegativity of the element S. The research indicates that this well-constructed composite would be a competitive candidate as a cathode material for Na-ion batteries.

Authors


  •   Chen, Mingzhe (external author)
  •   Cortie, David L.
  •   Hu, Zhe (external author)
  •   Jin, Huile (external author)
  •   Wang, Shun (external author)
  •   Gu, Qinfen (external author)
  •   Hua, Wei-Bo (external author)
  •   Wang, En-Hui (external author)
  •   Lai, Weihong (external author)
  •   Chen, Lingna (external author)
  •   Chou, Shulei
  •   Wang, Xiaolin
  •   Dou, Shi Xue

Publication Date


  • 2018

Citation


  • Chen, M., Cortie, D., Hu, Z., Jin, H., Wang, S., Gu, Q., Hua, W., Wang, E., Lai, W., Chen, L., Chou, S., Wang, X. & Dou, S. (2018). A Novel Graphene Oxide Wrapped Na2Fe2(SO4)3/C Cathode Composite for Long Life and High Energy Density Sodium-Ion Batteries. Advanced Energy Materials, 8 (27), 1800944-1-1800944-11.

Scopus Eid


  • 2-s2.0-85052394080

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3266

Has Global Citation Frequency


Start Page


  • 1800944-1

End Page


  • 1800944-11

Volume


  • 8

Issue


  • 27

Place Of Publication


  • Germany