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Sb2O3/MXene(Ti3C2Tx) hybrid anode materials with enhanced performance for sodium-ion batteries

Abstract

MXenes, a novel family of two dimensional (2D) materials with excellent electronic conductivity and hydrophilicity, have emerged as a promising material for energy storage. Based on the intercalation mechanism, MXenes have demonstrated an excellent performance for supercapacitors but low capacities for sodium-ion batteries. Herein, we developed a facile solution-phase method to fabricate the Sb2O3/MXene(Ti3C2Tx) hybrid materials for sodium storage with enhanced electrochemical performances. The as-prepared Sb2O3/Ti3C2Tx composite has a hierarchical structure with Sb2O3 nanoparticles (sub-50 nm) uniformly incorporated in the MXene Ti3C2Tx 3D networks. The Sb2O3 nanoparticles serve as a sufficient sodium ion reservoir; meanwhile, the MXene Ti3C2Tx network provides highly efficient pathways for transport of electrons and Na-ions. The volume expansion of Sb2O3 during sodiation/desodiation can be buffered and confined between the 2D Ti3C2Tx sheets. As a result, the Sb2O3/ Ti3C2Tx hybrid anodes present good structural stability and superior electrochemical performance in Na-ion batteries, including an excellent rate performance with a capacity of 295 mAh g-1 at 2A g-1, and an enhanced cycling performance with a capacity of 472 mAh g-1 after 100 cycles at 100 mA g-1. This work is expected to inspire the development of MXene materials for high performance batteries.

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Publication details

The article was received on 28 Mar 2017, accepted on 17 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7TA02689G
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Sb2O3/MXene(Ti3C2Tx) hybrid anode materials with enhanced performance for sodium-ion batteries

    X. Guo, X. Xie, S. Choi, Y. Zhao, H. Liu, C. Wang, S. Chang and G. Wang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA02689G

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