Core-shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries

X. J. Zhang, Y. Zhang, Z. Zhou, J. P. Wei, R. Essehli, B. El Bali

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Pristine Ni0.5TiOPO4 was prepared via a traditional solid-state reaction, and then Ni0.5TiOPO4/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni0.5TiOPO4 in glucose solution. X-ray diffraction patterns indicate that Ni0.5TiOPO4/C crystallizes in monoclinic P21/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of ∼3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni 0.5TiOPO4/C composites presented a capacity of 276 mAh g-1 after 30 cycles at the current density of 42.7 mA g-1, much higher than that of pristine Ni0.5TiOPO4 (155 mAh g-1). The improved electrochemical performances can be attributed to the existence of carbon shell.

Original languageEnglish
Pages (from-to)2290-2294
Number of pages5
JournalElectrochimica Acta
Volume56
Issue number5
DOIs
Publication statusPublished - 1 Feb 2011

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Keywords

  • Anode materials
  • Core-shell
  • Lithium-ion batteries
  • NiTiOPO/C

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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