Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent

Y. N. Ko, J. H. Kim, Y. J. Hong, Y. C. Kang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Li3V2(PO4)3/C nanoparticles are prepared by spray pyrolysis. Particles formed from spray solutions containing citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents are large and hollow with thin walls. Theoptimumconcentrations of citric acid andEDTAare each 0.1 M. Powders subsequently treated at 700 °C under a reducing atmosphere have particles of single phase, monoclinic Li 3V2(PO4)3. The Li3V 2(PO4)3/C powders contains 14.9 wt% carbon. The hollow structures are easily pulverized into nanoparticles by simple milling process. However, Li3V2(PO4)3 powder formed from spray solution without chelating agent has larger, aggregated structures. Both powders' charge curves show four plateaus at ca. 3.62, 3.70, 4.08 and 4.55 V. The initial discharge capacities of the Li3V 2(PO4)3/C powders at constant current densities of 0.1, 1 and 3 C were 147, 122 and 86mAhg-1, respectively. The capacity retention of the Li3V2(PO4) 3/C nanoparticles at a high current density of 1 C after 100th cycle was 78%.

Original languageEnglish
Pages (from-to)292-296
Number of pages5
JournalMaterials Chemistry and Physics
Volume131
Issue number1-2
DOIs
Publication statusPublished - 2011 Dec 15
Externally publishedYes

Keywords

  • Chemical synthesis
  • Composite materials
  • Electrochemical properties
  • Nanostructures

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent'. Together they form a unique fingerprint.

  • Cite this