Characteristics of ZnMn2O4 nanopowders prepared by flame spray pyrolysis for use as anode material in lithium ion batteries

Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

ZnMn2O4 nanopowders with homogeneous composition are prepared by flame spray pyrolysis from an aqueous spray solution containing Zn and Mn components. The ZnMn2O4 powders subjected to post-treatment at 500°C exhibit a mean size of 65 nm and nonaggregation characteristics. The discharge capacities of the precursor powder and the ZnMn2O4 powders post-treated at 400, 500, and 600°C are 1156, 1230, 1192, and 1086 mAh g-1, respectively, after 40 cycles at a current density of 300 mA g-1, and the corresponding capacity retentions measured after the first cycle are 69, 75, 78, and 79%. The ZnMn2O4 nanopowders post-treated at 500°C exhibit high initial discharge and charge capacities of 1192 and 632 mAh g-1, respectively, at a current density of 1000 mA g-1. The discharge capacity of the powders decreases from 1192 to 470 mAh g-1 during the first 15 cycles, and then becomes stable at values above 450 mAh g-1 until 110 cycles. Subsequently, the discharge capacities of the ZnMn2O4 nanopowders increase gradually from the 110th cycle onward. The maximum discharge capacity reaches 670 mAh g-1 after 160 cycles.

Original languageEnglish
Pages (from-to)6281-6290
Number of pages10
JournalInternational Journal of Electrochemical Science
Volume8
Issue number5
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Anode material
  • Flame spray pyrolysis
  • Nanoparticles
  • Zinc manganate

ASJC Scopus subject areas

  • Electrochemistry

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