Large-Scale Production of MoO3-Reduced Graphene Oxide Powders with Superior Lithium Storage Properties by Spray-Drying Process

Gi Dae Park, Jong Hwa Kim, Yun Ju Choi, Yun Chan Kang

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A MoO3-reduced graphene oxide (rGO) composite powder with spherical shape is prepared by a simple spray-drying process by applying a water-soluble metal salt. Ammonium molybdate-GO composite powders prepared by spray drying turn into a MoO3-rGO powder by heat treatment at 300 °C under air atmosphere. The MoO3 nanocrystals are uniformly dispersed in a crumpled spherical rGO structure. MoO3 and MoO3-C powders, both with spherical particles, are also prepared by the same process for comparison of their electrochemical properties. The discharge capacities of the MoO3, MoO3-C, and MoO3-rGO powders after 100 cycles at a current density of 500 mA g-1 are 506, 738, and 1115 mA h g-1, respectively, and their corresponding capacity retentions measured from the second cycle are 53, 71, and 92%, respectively. The rGO layers improve the structural stability and electric conductivity of the MoO3-rGO composite powder. Therefore, the MoO3-rGO powder shows superior electrochemical properties as compared with the MoO3 and MoO3-C powders prepared by the same preparation procedure.

Original languageEnglish
Pages (from-to)581-587
Number of pages7
JournalElectrochimica Acta
Volume173
DOIs
Publication statusPublished - 2015 May 30

Keywords

  • Carbon composite
  • Electrochemical properties
  • Molybdenum oxide
  • Reduced graphene oxide
  • Spray drying

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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