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Issue 17, 2019
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Enhancement of the advanced Na storage performance of Na3V2(PO4)3 in a symmetric sodium full cell via a dual strategy design

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Abstract

The exploration of advanced cathode materials with high electron conductivity and sodium-ion diffusion coefficient is of great significance for the further development of sodium-ion batteries. To improve the sodium-ion storage performance, herein, a dual strategy design involving the combination of a highly porous Na3V2(PO4)3 structure and a superior ionic/electronic conductive sulfur-doped carbon layer (HP-NVP@SC) is presented; a number of advantageous qualities, including large surface area, numerous active sites and a well-developed diffusion pathway, are exhibited by this composite. Notably, the HP-NVP@SC composite exhibits a superior rate performance (116.5 mA h g−1 at 1C; 95 mA h g−1 at 30C) and long-term cycling stability with 91% capacity retention after 2500 charge/discharge cycles at 20C. Specifically, the symmetric full cell assembled using the HP-NVP@SC composite as both a cathode and an anode also shows remarkable rate capability and notable cycling life with the high energy density of 164 W h kg−1 at 1C. This dual strategy may inspire more research towards the construction of high-performance sodium-ion batteries.

Graphical abstract: Enhancement of the advanced Na storage performance of Na3V2(PO4)3 in a symmetric sodium full cell via a dual strategy design

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Supplementary files

Article information


Submitted
23 Feb 2019
Accepted
28 Mar 2019
First published
28 Mar 2019

J. Mater. Chem. A, 2019,7, 10231-10238
Article type
Communication

Enhancement of the advanced Na storage performance of Na3V2(PO4)3 in a symmetric sodium full cell via a dual strategy design

W. Li, Z. Yao, Y. Zhong, C. Zhou, X. Wang, X. Xia, D. Xie, J. Wu, C. Gu and J. Tu, J. Mater. Chem. A, 2019, 7, 10231
DOI: 10.1039/C9TA02041A

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