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Synergistic effect of cross-linked carbon nanosheet frameworks and Sb on the enhancement of sodium storage performances

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Abstract

As an anode material for sodium-ion batteries (SIBs), antimony (Sb) has attracted significant interest due to its high theoretical specific capacity. However, it suffers from a huge volume change during the sodiation–desodiation process that leads to poor cyclability. Herein, cross-linked carbon nanosheet frameworks (CCNFs) and Sb nanoparticles (NPs) were combined to construct a high-performance anode material for SIBs. In this composite, Sb nanoparticles were tightly anchored on the carbon frameworks; this provided enhanced structural stability to Sb and prevented the agglomeration during the charge–discharge process. Sb provides a high specific capacity, and the carbon frameworks ensure structural integrity and conductive networks. Moreover, due to this synergistic effect, the as-prepared Sb/CCNFs composite exhibits an excellent cycle stability and rate performances. Considering both the capacity and rate property, the overall performances of the obtained Sb/CCNFs reach the highest level in comparison with those of the reported Sb/C composites. The reversible (charge) capacity can remain 549.3 mA h g−1 after 100 cycles at a current density of 100 mA g−1. Moreover, a superior rate performance is observed as the reversible capacity still reaches 318 mA h g−1 at a high current density of 3200 mA g−1. Therefore, this study proposes an effective methodology to improve the key performances of the SIB anode.

Graphical abstract: Synergistic effect of cross-linked carbon nanosheet frameworks and Sb on the enhancement of sodium storage performances

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Publication details

The article was received on 13 Jun 2017, accepted on 08 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02105D
Citation: New J. Chem., 2017, Advance Article
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    Synergistic effect of cross-linked carbon nanosheet frameworks and Sb on the enhancement of sodium storage performances

    H. Hou, G. Zou, P. Ge, G. Zhao, W. Wei, X. Ji and L. Huang, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ02105D

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