N-Doped Carbon Nanotubes Decorated Na3V2(PO4)2F3 as a Durable Ultrahigh-rate Cathode for Sodium Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Taosheng Wang
  • Wei Zhang
  • Junxian Hu
  • Yanqing Lai
  • Zhian Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)3845-3853
Journal / PublicationACS Applied Energy Materials
Volume3
Issue number4
Online published6 Apr 2020
Publication statusPublished - 27 Apr 2020

Abstract

Na3V2(PO4)2F3 (NVPF) is emerging as one of the most prospective cathodes for sodium ion batteries due to its robust structure, rapid diffusion of sodium ions, and high energy density. However, the poor electronic conductivity leads to unsatisfactory rate capability and insufficient cyclability. Herein, the meticulous design and preparation of NVPF particles anchored on N-doped carbon nanotubes is realized via a plain sol-gel method. It demonstrates that a N-doped carbon nanotubes matrix can evidently boost the electronic/ionic conductivity of the material and promote the charge transfer between the electrode and electrolyte interface. Moreover, the patulous surface decorated with CNTs leads to the significant contribution of pseudocapacitance effect. Consequently, the electrochemical characteristics of this NVPF particles in a N-doped electron-rich matrix are significantly enhanced, exhibiting a capacity of 126 mA h g-1 at 0.5 C and ultrahigh-rate capability of 76 mA h g-1 at 100 C. Besides, an impressive capacity retention of 60.4% upon long-term cycling (1500 cycles) at a high rate of 40 C is also achieved.

Research Area(s)

  • sodium ion batteries, Na3V2(PO4)2F3, carbon nanotubes, doping, ultrahigh-rate, EXCELLENT CYCLING STABILITY, SUPERIOR RATE CAPABILITY, HIGH-VOLTAGE CATHODE, ELECTROCHEMICAL PERFORMANCE

Citation Format(s)

N-Doped Carbon Nanotubes Decorated Na3V2(PO4)2F3 as a Durable Ultrahigh-rate Cathode for Sodium Ion Batteries. / Wang, Taosheng; Zhang, Wei; Li, Huangxu; Hu, Junxian; Lai, Yanqing; Zhang, Zhian.

In: ACS Applied Energy Materials, Vol. 3, No. 4, 27.04.2020, p. 3845-3853.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review