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Rationally Assembled rGO/Sn/Na2Zr(PO4)2 Nanocomposites as High Performance Anode Materials for Lithium and Sodium Ion Batteries

Abstract

Zr(HPO4)2 is a promising anode material for secondary batteries due to its intrinsic layered structure. However, the poor electronic conductivity, and low coulombic efficiency hint its practice application. To overcome those disadvantages, Sn/Na2Zr(PO4)2 composites are obtained by one-pot ion exchange and further wrapped with reduced graphene oxide (rGO) sheets to form rGO/Sn/Na2Zr(PO4)2 ternary composite with three-dimensional network structure. The ternary composite exhibit enhanced reversible capacity and rate capability, which is attributed to the structural and physical properties of each component and their efficient synergistic effect. It is illustrated that the large interlayer space of Na2Zr(PO4)2, the ability to form alloys with lithium of Sn, and intrinsic ultra-large specific surface of reduced graphene oxide sheets together afford the ternary composites with high specific capacity for lithium and sodium storage. The manifest electron and ion conductivities of Sn and reduced graphene oxide, and the three-dimensional network of the composites provide the ternary composites with great rate capabilities. In addition, the reduced graphene oxide sheets in the ternary composite can effectively improve the electrochemical kinetic properties. Further, the overall electrochemical property of the rGO/Sn/Na2Zr(PO4)2 ternary composite can be tuned by varying the ratio of the three components.

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Publication details

The article was received on 12 Mar 2019, accepted on 11 Apr 2019 and first published on 12 Apr 2019


Article type: Paper
DOI: 10.1039/C9SE00158A
Citation: Sustainable Energy Fuels, 2019, Accepted Manuscript

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    Rationally Assembled rGO/Sn/Na2Zr(PO4)2 Nanocomposites as High Performance Anode Materials for Lithium and Sodium Ion Batteries

    M. Ma, W. Shen, J. Zhang and S. Guo, Sustainable Energy Fuels, 2019, Accepted Manuscript , DOI: 10.1039/C9SE00158A

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