Jump to main content
Jump to site search


Three-dimensional nitrogen-doped holey graphene and transition metal oxide composites for sodium-ion batteries

Author affiliations

Abstract

Transition metal oxides (TMOs) such as nickel cobaltite (NCO) and magnetite (Fe3O4) with rich electroactive sites are promising anode materials for sodium-ion batteries (NIBs). However, these materials suffer from large volume change during charge/discharge, poor electron conductivity and severe aggregation of TMO nanoparticles. Here, we report an approach to improve the electrochemical performance of NCO and Fe3O4 by stabilizing them on three-dimensional (3D) nitrogen-doped holey graphene (N-HG), forming NCO@N-HG and Fe3O4@N-HG composite materials, respectively. The thin graphene sheets in both composites facilitate the electron transport and buffer the volume changes, while the interconnected 3D macroporous network with a pore size in the range of several micrometers, combined with the nanopores in the N-HG provide pathways for rapid ion transport. As expected, both composites showed high specific capacities, rate capability and cycling performance in NIBs. The good electrochemical performance of the electrode material indicates that using N-HG to support NCO and Fe3O4 particles is an effective approach towards developing high-performance anode materials for NIBs.

Graphical abstract: Three-dimensional nitrogen-doped holey graphene and transition metal oxide composites for sodium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Sep 2018, accepted on 02 Dec 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA09188A
Citation: J. Mater. Chem. A, 2019, Advance Article
  •   Request permissions

    Three-dimensional nitrogen-doped holey graphene and transition metal oxide composites for sodium-ion batteries

    D. Yang, B. Xu, Q. Zhao and X. S. Zhao, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA09188A

Search articles by author

Spotlight

Advertisements