Issue 12, 2018

Multi-heteroatom doped carbon coated Na3V2(PO4)3 derived from ionic liquids

Abstract

Multi-heteroatom (N, S and F) doped carbon coated Na3V2(PO4)3 (labeled as NVP/C-ILs) derived from an ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM]TF2N) has been successfully fabricated. The as-prepared Na3V2(PO4)3 particles are well dispersed and closely coated with a multi-heteroatom (N, S and F) doped carbon layer. As a cathode for sodium-ion batteries, the NVP/C-ILs electrode exhibits high reversible specific capacity (117.5 mA h g−1 at 1C), superior rate performance (93.4 mA h g−1 at 10C) and excellent cycling stability (∼95% capacity retention ratio at 10C over 1000 cycles). The impressive electrochemical performance of NVP/C-ILs can be attributed to effectively conductive networks for electrons and Na+ ions induced by a joint effect of N, S and F doping on carbon. The use of multi-heteroatom doped carbon coated Na3V2(PO4)3 provides a facile and effective strategy for the fabrication of high performance electrode materials with low intrinsic electrical conductivity.

Graphical abstract: Multi-heteroatom doped carbon coated Na3V2(PO4)3 derived from ionic liquids

Supplementary files

Article information

Article type
Paper
Submitted
07 Jan 2018
Accepted
10 Feb 2018
First published
13 Feb 2018

Dalton Trans., 2018,47, 4259-4266

Multi-heteroatom doped carbon coated Na3V2(PO4)3 derived from ionic liquids

L. Zhang, Y. Zhou, T. Li, D. Ma and X. Yang, Dalton Trans., 2018, 47, 4259 DOI: 10.1039/C8DT00062J

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