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Facile Synthesis of Three-Dimensional Sandwiched MnO2@GCs@MnO2 Hybrid Nanostructured Electrode for Electrochemical Capacitors

Journal Article


Abstract


  • Designable control over the morphology and structure of active materials is highly desirable for achieving high-performance devices. Here, we develop a facile microwave-assisted synthesis to decorate MnO2 nanocrystals on three-dimensional (3D) graphite-like capsules (GCs) to obtain sandwich nanostructures (3D MnO2@GCs@MnO2) as electrode materials for electrochemical capacitors (ECs). A templated growth of the 3D GCs was carried out via catalytic chemical vapor deposition and MnO2 was decorated on the exterior and interior surfaces of the GC walls through microwave irradiation to build an engineered architecture with robust structural and morphological stability. The unique sandwiched architecture has a large interfacial surface area, and allows for rapid electrolyte diffusion through its hollow/open framework and fast electronic motion via the carbon backbone. Furthermore, the tough and rigid nature of GCs provides the necessary structural stability, and the strong synergy between MnO2 and GCs leads to high electrochemical activity in both neutral (265.1 F/g at 0.5 A/g) and alkaline (390 F/g at 0.5 A/g) electrolytes. The developed hybrid exhibits stable capacitance up to 6000 cycles in 1 M Na2SO4. The hybrid is a potential candidate for future ECs and the present study opens up an effective avenue to design hybrid materials for various applications.

Authors


  •   Jian, Xian (external author)
  •   Liu, Shiyu (external author)
  •   Gao, Yuqi (external author)
  •   Zhang, Wanli (external author)
  •   He, Weidong (external author)
  •   Mahmood, Asif (external author)
  •   Mayandi Subramaniyam, Chandrasekar (external author)
  •   Wang, Xiaolin
  •   Mahmood, Nasir (external author)
  •   Dou, Shi Xue

Publication Date


  • 2017

Citation


  • Jian, X., Liu, S., Gao, Y., Zhang, W., He, W., Mahmood, A., Mayandi Subramaniyam, C., Wang, X., Mahmood, N. & Dou, S. Xue. (2017). Facile Synthesis of Three-Dimensional Sandwiched MnO2@GCs@MnO2 Hybrid Nanostructured Electrode for Electrochemical Capacitors. ACS Applied Materials and Interfaces, 9 (22), 18872-18882.

Scopus Eid


  • 2-s2.0-85020251580

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2573

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 18872

End Page


  • 18882

Volume


  • 9

Issue


  • 22

Place Of Publication


  • United States

Abstract


  • Designable control over the morphology and structure of active materials is highly desirable for achieving high-performance devices. Here, we develop a facile microwave-assisted synthesis to decorate MnO2 nanocrystals on three-dimensional (3D) graphite-like capsules (GCs) to obtain sandwich nanostructures (3D MnO2@GCs@MnO2) as electrode materials for electrochemical capacitors (ECs). A templated growth of the 3D GCs was carried out via catalytic chemical vapor deposition and MnO2 was decorated on the exterior and interior surfaces of the GC walls through microwave irradiation to build an engineered architecture with robust structural and morphological stability. The unique sandwiched architecture has a large interfacial surface area, and allows for rapid electrolyte diffusion through its hollow/open framework and fast electronic motion via the carbon backbone. Furthermore, the tough and rigid nature of GCs provides the necessary structural stability, and the strong synergy between MnO2 and GCs leads to high electrochemical activity in both neutral (265.1 F/g at 0.5 A/g) and alkaline (390 F/g at 0.5 A/g) electrolytes. The developed hybrid exhibits stable capacitance up to 6000 cycles in 1 M Na2SO4. The hybrid is a potential candidate for future ECs and the present study opens up an effective avenue to design hybrid materials for various applications.

Authors


  •   Jian, Xian (external author)
  •   Liu, Shiyu (external author)
  •   Gao, Yuqi (external author)
  •   Zhang, Wanli (external author)
  •   He, Weidong (external author)
  •   Mahmood, Asif (external author)
  •   Mayandi Subramaniyam, Chandrasekar (external author)
  •   Wang, Xiaolin
  •   Mahmood, Nasir (external author)
  •   Dou, Shi Xue

Publication Date


  • 2017

Citation


  • Jian, X., Liu, S., Gao, Y., Zhang, W., He, W., Mahmood, A., Mayandi Subramaniyam, C., Wang, X., Mahmood, N. & Dou, S. Xue. (2017). Facile Synthesis of Three-Dimensional Sandwiched MnO2@GCs@MnO2 Hybrid Nanostructured Electrode for Electrochemical Capacitors. ACS Applied Materials and Interfaces, 9 (22), 18872-18882.

Scopus Eid


  • 2-s2.0-85020251580

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2573

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 18872

End Page


  • 18882

Volume


  • 9

Issue


  • 22

Place Of Publication


  • United States