title: Surface Modification of Na3V2(PO4)3by Nitrogen and Sulfur Dual-Doped Carbon Layer with Advanced Sodium Storage Property.
abstract: Nitrogen and sulfur dual-doped carbon layer wrapped Na3V2(PO4)3nanoparticles (NVP@NSC) have been successfully fabricated by the facile solid-state method. In this hierarchical structure, the Na3V2(PO4)3nanoparticles are well dispersed and closely coated by nitrogen and sulfur dual-doped carbon layer, constructing an effective and interconnected conducting network to reduce the internal resistance. Furthermore, the uniform coating layers alleviate the agglomeration of Na3V2(PO4)3as well as mitigate the side reaction between electrode and electrolyte. Because of the excellent electron transfer mutually enhancing sodium diffusion for this extraordinary structure, the NVP@NSC composite delivers an impressive discharge capacity of 113.0 mAh g-1at 1 C and shows a capacity retention of 82.1% after 5000 cycles at an ultrahigh rate of 50 C, suggesting the remarkable rate capability and long cyclicity. Surprisingly, a reversible capacity of 91.1 mAh g-1is maintained after 1000 cycles at 5 C under the elevated temperature of 55 °C. The approach of nitrogen and sulfur dual-doped carbon-coated Na3V2(PO4)3provides an effective and promising strategy to enhance the ultrahigh rate and ultralong life property of cathode, which can be used for large-scale commercial production in sodium ion batteries.
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Xinghui
authors.initials: X
authors.lastname: Liang
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Ou
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Fenghua
authors.initials: F
authors.lastname: Zheng
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Qichang
authors.initials: Q
authors.lastname: Pan
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Xunhui
authors.initials: X
authors.lastname: Xiong
authors.affiliation: Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Renzong
authors.initials: R
authors.lastname: Hu
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.
authors.forename: Chenghao
authors.identifier: http://orcid.org/0000-0002-3214-328X
authors.initials: C
authors.lastname: Yang
authors.affiliation: Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology , Guangzhou 510006, P. R. China.|School of Materials Science & Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0245, United States.
authors.forename: Meilin
authors.identifier: http://orcid.org/0000-0002-6188-2372
authors.initials: M
authors.lastname: Liu
keywords: Na3V2(PO4)3; cathode; nitrogen and sulfur dual doping; rate property; sodium ion batteries