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A novel nitrogen-doped reduced graphene oxide-bonded Sb nanoparticles for improved sodium storage performance

Abstract

As a promising anode material for sodium-ion batteries, Sb has attracted considerable attention due to its high theoretical capacity (660 mAh g−1). However, it exhibits poor cycling stability because of its great volume change during sodium ion uptake and release process. In order to solve the problem, using the ionic liquid Emim-dca as nitrogen source, a novel nitrogen-doped reduced graphene oxide-bonded Sb nanoparticles (Sb/N-rGO) is produced by ball-milling and subsequent pyrolysis treatment. As an anode material for sodium-ion batteries, Sb/N-rGO shows high capacity, excellent cycling stability, and high rate performance. A high reversible capacity of 304.8 mAh g−1 is achieved even at current density of 5 A g−1. Even after 500 cycles, there are still 90.7% capability retention (473.2 mAh g−1) at a current density of 0.1 A g−1. The superior sodium storage performance can be assigned to the strong bonding between Sb and pyrrolic nitrogen in nitrogen-doped reduced graphene oxide. The facile synthesis strategy can potentially be applied to other anode materials for sodium-ion batteries.

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Publication details

The article was received on 30 Mar 2018, accepted on 15 May 2018 and first published on 16 May 2018


Article type: Paper
DOI: 10.1039/C8TA02945H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    A novel nitrogen-doped reduced graphene oxide-bonded Sb nanoparticles for improved sodium storage performance

    Y. Fang, X. Xu, Y. Du, X. Zhu, X. Zhou and J. Bao, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02945H

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