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

Abstract

Multi-heteroatom (N, S and F) doped carbon coated Na3V2(PO4)3 (labeled as NVP/C-ILs) derived from 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 by multi-heteroatom (N, S and F) doped carbon layer. As a cathode for sodium-ion battery, the NVP/C-ILs electrode exhibits high reversible specific capacity (117.5 mAh g-1 at 1 C), superior rate performance (93.4 mAh g-1 at 10 C) and excellent cycling stability (~95 % capacity retention ratio at 10 C over 1000 cycles). The impressive electrochemical performance of NVP/C-ILs can be attributed to the effectively conductive networks for electrons and Na+ ions induced by the joint effect of N, S and F doping on carbon. The approach of multi-heteroatom doped carbon coated Na3V2(PO4)3 provides a facile and effective strategy to fabricate high performance electrode materials with low intrinsic electrical conductivity.

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Publication details

The article was received on 07 Jan 2018, accepted on 10 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C8DT00062J
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Multi-heteroatom doped carbon coated Na3V2(PO4)3 derived from ionic liquid

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

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