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Carbonates (Bicarbonates)/Reduced Graphene Oxide as Anode Materials for Sodium-Ion Batteries

Abstract

Carbonates/bicarbonates (FeCO3, CoCO3 and Ni(HCO3)2) supported on reduced graphene oxide (rGO) are prepared by a simple method and examined as anode materials of sodium ion batteries for the first time. Although carbonates in the composite are on the order of micrometer, they show fair electrochemical activities, particularly for FeCO3/rGO. It delivers a capacity of 247 mAh g-1 after 500 cycles at 500 mA g-1, corresponding to a capacity retention of 87 % relative to the capacity at the second cycle. It also shows a superior rate capability with a capacity of 176 mAh g-1 at 2 A g-1. Ex-situ XPS spectra, HRTEM images and SAED patterns demonstrate that the sodium uptake/extraction in FeCO3, CoCO3 and Ni(HCO3)2 is in the way of M0/M2+-engaged redox reaction.

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Publication details

The article was received on 27 Sep 2017, accepted on 13 Nov 2017 and first published on 13 Nov 2017


Article type: Communication
DOI: 10.1039/C7TA08532J
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Carbonates (Bicarbonates)/Reduced Graphene Oxide as Anode Materials for Sodium-Ion Batteries

    X. Gu, C. Yan, L. Yan, L. Cao, F. Niu, D. Liu, P. Dai, L. Li, J. Yang and X. Zhao, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA08532J

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