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Hierarchically structured Co3O4@carbon porous fibers derived from electrospun ZIF 67/PAN nanofibers as anode of Lithium ion batteries

Abstract

ZIF-67, a highly porous zeolite type metal-organic framework (MOF), has been deliberately chosen as precursor for Co3O4 as it derived Co3O4 NPs show high surface area, hierarchical pores, and rich nitrogen content. However, it remains a challenge to improve the performance and stability of ZIF-67 derivatives as their structures are easy to sinter or collapse during the calcination and cyclic process. We herein introduce a facile method to prepare continuous porous carbon fibers with uniformly distributed Co3O4 hollow NPs by directly electrospinning of ZIF-67 NPs and following a thermal treatment, in which the micropores and Co3O4 host high-density active sites and macropores can improve mass/charge transports. Besides, the carbon derived from polymer protects the porous structure from collapse and thus the material shows high electrochemical stability. In addition, the graphitization of carbon can be catalyzed and the layer space can be enhanced by cobalt during the heat treatment process, which is favorable to the conductivity. Benefiting from the unique structural and compositional advantages, the as-obtained ES-CNCo3O4 with hierarchical porous structures shows excellent electrochemical performances as an anode material for lithium ion batteries (LIBs), such as the high capacities, high rate performance and good stability.

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Publication details

The article was received on 13 Apr 2018, accepted on 08 Jun 2018 and first published on 08 Jun 2018


Article type: Communication
DOI: 10.1039/C8TA03397H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Hierarchically structured Co3O4@carbon porous fibers derived from electrospun ZIF 67/PAN nanofibers as anode of Lithium ion batteries

    C. Zhang, B. Lu, F. Cao, Z. Yu, H. Cong and S. Yu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA03397H

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