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Issue 24, 2018
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Confined formation of monoclinic Na4Ti5O12 nanoparticles embedded into porous CNTs: towards enhanced electrochemical performances for sodium ion batteries

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Abstract

Monoclinic Na4Ti5O12 (M-Na4Ti5O12) has continuous two-dimensional (2D) channels with Na sites that are partially occupied, providing a broad pathway and sufficient space for the intercalation of Na+. However, the capacity of M-Na4Ti5O12 does not meet the requirement of an anode material for practical applications, due to its poor Na+ diffusion kinetics. Herein, by utilizing the unique advantages of hybrid nanostructures, we overcome these impediments by fabricating M-Na4Ti5O12/C hybrid porous nanotubes. Bamboo-like porous CNTs homogeneously embedded with M-Na4Ti5O12 nanoparticles were derived from bamboo-like polymer nanotubes, which acted as the source of carbon and the template to shape the M-Na4Ti5O12 nanoparticles without the presence of aggregation. The hybrid structure not only provided a conductive and interconnected carbon matrix, but also accommodated the volume change during electrochemical reaction processes. As a result, the hybrid showed excellent rate performance and cycling stability as an anode for sodium ion batteries (SIBs), with a capacity retention of 44.2 mA h gāˆ’1 after 3000 cycles at 1 A gāˆ’1. Such a new hybrid structure should be a promising candidate as an anode material for SIBs.

Graphical abstract: Confined formation of monoclinic Na4Ti5O12 nanoparticles embedded into porous CNTs: towards enhanced electrochemical performances for sodium ion batteries

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Publication details

The article was received on 29 Aug 2018, accepted on 01 Nov 2018 and first published on 15 Nov 2018


Article type: Letter
DOI: 10.1039/C8NJ04398A
Citation: New J. Chem., 2018,42, 19340-19343
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    Confined formation of monoclinic Na4Ti5O12 nanoparticles embedded into porous CNTs: towards enhanced electrochemical performances for sodium ion batteries

    Y. Tang, L. Liu, Y. Zhang, H. Zhao, L. Kong and S. Gao, New J. Chem., 2018, 42, 19340
    DOI: 10.1039/C8NJ04398A

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