Characteristics of Li3V2(PO4) 3/C powders prepared by ultrasonic spray pyrolysis

You Na Ko, Hye Young Koo, Jung Hyun Kim, Jang Heui Yi, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Li3V2(PO4)3 and Li 3V2(PO4)3/C powders are prepared by ultrasonic spray pyrolysis from spray solutions with and without sucrose. The precursor powders have a spherical shape and the crystal structure of V 2O3 irrespective of the concentration of sucrose in the spray solution. The powders post-treated at 700 °C have the pure crystal structure of the Li3V2(PO4)3 phase irrespective of the concentration of sucrose in the spray solution. The Li 3V2(PO4)3 powders prepared from the spray solution without sucrose have a non-spherical shape and hard aggregation. However, the Li3V2(PO4)3/C powders prepared from the spray solution with sucrose have a spherical shape and non-aggregation characteristics. The Li3V2(PO 4)3 powders prepared from the spray solution without sucrose have a low initial discharge capacity of 122 mAh g-1. However, the Li3V2(PO4)3/C powders prepared from the spray solutions with 0.1, 0.3, and 0.5 M sucrose have initial discharge capacities of 141, 130, and 138 mAh g-1, respectively. After 25 cycles, the discharge capacities of the powders formed from the spray solutions with and without 0.1 M sucrose are 70% and 71% of the initial discharge capacities, respectively.

Original languageEnglish
Pages (from-to)6682-6687
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number16
DOIs
Publication statusPublished - 2011 Aug 15

Keywords

  • Cathode material
  • Lithium vanadium phosphate
  • Spray pyrolysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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