Frontiers in Chemistry (Jul 2018)

Ultrafine NaTi2(PO4)3 Nanoparticles Encapsulated in N-CNFs as Ultra-Stable Electrode for Sodium Storage

  • Sicen Yu,
  • Yi Wan,
  • Chaoqun Shang,
  • Zhenyu Wang,
  • Liangjun Zhou,
  • Jianli Zou,
  • Hua Cheng,
  • Zhouguang Lu

DOI
https://doi.org/10.3389/fchem.2018.00270
Journal volume & issue
Vol. 6

Abstract

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We present a feasible method for the preparation of one-dimensional N-doping carbon nanofibers encapsulated NaTi2(PO4)3 (NTP-NCNFs) through electrospinning accompanied by calcination. The poor electrical conductivity of NTP is significantly improved and the as-prepared NTP-NCNFs exhibit stable and ultrafast sodium-storage capability. The NTP-NCNFs maintains a stable specific capacity of 121 mAh g−1 at 10 C after 2,000 cycles, which only drop to 105 mAh g−1 after 20,000 cycles. Furthermore, the NTP-NCNFs show excellent rate performance from 0.2 to 20 C, whose recovery efficiency still reaches 99.43%. The superior electrochemical property is mainly attributed to the large specific surface area, high porosity, N-doping carbon coating, and one-dimensional structure of NTP-NCNFs.

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