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Issue 30, 2017
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Nanoporous carbon leading to the high performance of a Na3V2O2(PO4)2F@carbon/graphene cathode in a sodium ion battery

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Abstract

The Na3V2O2(PO4)2F/graphene sandwich cathode has attracted great attention as a potential candidate for sodium-ion batteries in view of its high capacity and good cycling ability. However, a big issue for Na3V2O2(PO4)2F/graphene is its extremely poor electronic conductivity due to the multilayer structure in which Na3V2O2(PO4)2F particles are located between the graphene layers. We introduced carbon in the Na3V2O2(PO4)2F/graphene sandwich to form a 3D architecture – Na3V2O2(PO4)2F@carbon/graphene (NVPF@C/G). A battery with the NVPF@C/G cathode presents good electrochemical properties, a high capacity, 135.8 mAh g−1 at 0.1C, with a capacity retention of 96.8% at 2C for fifty cycles. NVPF@C/G showed obvious advantage in the rate performance and cycle stability compared with the NVPF/G sandwich, which indicated that the nanoporous carbon integrated in the 3D structure plays a crucial role in improving the electrochemical performance. It is anticipated that such a new method of introducing nanoporous carbon for battery performance enhancement can be extended to other graphene-based sandwich structure electrodes.

Graphical abstract: Nanoporous carbon leading to the high performance of a Na3V2O2(PO4)2F@carbon/graphene cathode in a sodium ion battery

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Publication details

The article was received on 19 Apr 2017, accepted on 19 Jun 2017 and first published on 20 Jun 2017


Article type: Paper
DOI: 10.1039/C7CE00726D
Citation: CrystEngComm, 2017,19, 4287-4293
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    Nanoporous carbon leading to the high performance of a Na3V2O2(PO4)2F@carbon/graphene cathode in a sodium ion battery

    H. Jin, M. Liu, E. Uchaker, J. Dong, Q. Zhang, S. Hou, J. Li and G. Cao, CrystEngComm, 2017, 19, 4287
    DOI: 10.1039/C7CE00726D

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