Morphological and electrochemical properties of LiV3O 8 cathode powders prepared by spray pyrolysis

S. H. Ju, Y. C. Kang

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Lithium trivanadate (LiV3O8) powders are prepared by spray pyrolysis. The precursor powders of LiV3O8 obtained by spray pyrolysis have spherical and rod-like morphologies. The LiV 3O8 powders post-treated at 300°C and 400°C also have spherical and rod-like morphologies. However, the LiV3O 8 cathode powders post-treated at 500°C consist of only rod-like crystals. The crystalline structure of the precursor powders that were directly prepared by spray pyrolysis comprised of LiV3O8 layers along with a small amount of β-Li0.33V2O5 impurity. The peak due to β-Li0.33V2O5 persisted in the XRD spectrum even after posttreatment at 300°C. On the other hand, crystalline structures of the powders post-treated at 400°C and 500°C comprised pure LiV3O8 layers. The initial discharge capacities of the LiV3O8 cathode powders decrease from 344mAhg-1 to 261mAhg-1 when the post-treatment temperatures increase from 300°C to 500°C. The discharge capacities of the LiV3O8 cathode powders obtained after post-treatment at 400°C and 500°C are approximately 255mAhg-1 and 236mAhg-1, respectively, after 40 cycles.

Original languageEnglish
Pages (from-to)6088-6092
Number of pages5
JournalElectrochimica Acta
Volume55
Issue number20
DOIs
Publication statusPublished - 2010 Aug 1
Externally publishedYes

Keywords

  • Cathode materials
  • Lithium vanadate
  • Spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Fingerprint Dive into the research topics of 'Morphological and electrochemical properties of LiV<sub>3</sub>O <sub>8</sub> cathode powders prepared by spray pyrolysis'. Together they form a unique fingerprint.

Cite this