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Synergistic Effect of Cross-linked Carbon Nanosheet Frameworks and Sb on Enhancing the Sodium Storage Performances

Abstract

As an anode material for sodium-ion batteries (SIBs), antimony (Sb) has attracted a great deal of interest due to its high theoretical specific capacity. However, it suffers from huge volume exchange in the sodiation-desodiation process, leading to the poor cycle ability. Here, the cross-linked carbon nanosheets frameworks (CCNFs) and Sb nanoparticles (NPs) are combined to construct a high-performance anode material for SIBs. In this composite, Sb nanoparticles are anchored tightly on the carbon frameworks, which brings the enhanced structure stability of Sb and prevent agglomeration during the charge-discharge process. The Sb contributes to a high specific capacity and the carbon frameworks ensure the structure integrity and conductive networks, and benefitting from this synergistic effect, the as-prepared Sb/CCNFs composite exhibits excellent cycle stability and rate performances. In consideration of both capacity and rate property, the overall performances of obtained Sb/CCNFs reach the highest level in comparison with reported Sb/C composites. The reversible capacity can remain 549.3 mAh g-1 after 100 cycles at a current density of 100 mA g-1. And the superior rate performance is also observed, as the reversible capacity still reachs 318 mAh g-1 at a high current density of 3200 mA g-1. Therefore, this work proposes an effective methodology to improve the key performances of SIBs anode.

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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, Accepted Manuscript
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    Synergistic Effect of Cross-linked Carbon Nanosheet Frameworks and Sb on Enhancing the Sodium Storage Performances

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

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