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      Mesoporous Vertical Co3O4 Nanosheet Arrays on Nitrogen-Doped Graphene Foam with Enhanced Charge-Storage Performance.

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          Abstract

          A hierarchical electrode structure, consisting of cobalt oxide and nitrogen-doped graphene foam (NGF), has been fabricated with the aim of achieving enhanced charge-storage performance. Characterization of the material via electron microscopy and Raman spectroscopy demonstrates that the Co3O4 nanosheets grow vertically on NGF and the nanosheets are mesoporous with pore diameters between 3 and 8 nm. The Co3O4/NGF electrode shows an enhanced charge-storage performance, attributed to the 3D hierarchical structure and the synergistic effect of Co3O4 and NGF. The present study shows that specific capacitances as high as 451 F g(-1) can be obtained, indicating that high-performance electrochemical capacitors can be made using electrode materials with advanced structures. The present electrode design can be readily extended to other electroactive materials and their composites.

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          Author and article information

          Journal
          ACS Appl Mater Interfaces
          ACS applied materials & interfaces
          American Chemical Society (ACS)
          1944-8252
          1944-8244
          Oct 21 2015
          : 7
          : 41
          Affiliations
          [1 ] School of Chemistry and‡School of Materials, University of Manchester , Manchester M13 9PL, United Kingdom.
          Article
          10.1021/acsami.5b05095
          26403179
          6aa9d6f6-4e19-4043-9a58-9d0252a53585
          History

          charge storage,cobalt oxide,enhanced capacitive performance,hollow 3D structure,nitrogen-doped graphene foam

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