Synthesis of Na2Ti3O7 nanorods by a V-assisted route and investigation of their battery performance


Altin S., Demirel S., Oz E., Altin E., Hetherington C., Bayri A., ...Daha Fazla

CRYSTENGCOMM, cilt.22, ss.2483-2490, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 22 Konu: 14
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1039/c9ce01955c
  • Dergi Adı: CRYSTENGCOMM
  • Sayfa Sayıları: ss.2483-2490

Özet

We report the V-assisted synthesis of Na2Ti3O7 nanorods via a conventional solid state reaction technique. Energy dispersive X-ray spectroscopy (EDS) mapping showed that V-ions are not incorporated into the main structure of the nanorods but rather V behaves as a flux agent during the growth of the nanorods. The cyclic voltammetry (CV) analysis of the samples shows changes in the redox peaks as a function of V content. Our detailed ex situ X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray absorption spectroscopy (XAS) analyses after 1000 cycles show that the degradation mechanism is the formation of various titanium oxide impurity phases which inhibits the Na-ion diffusion.