Preparation of LiMn2O4 powders via spray pyrolysis and fluidized bed hybrid system

Izumi Taniguchi, Keigo Matsuda, Hiroki Furubayashi, Shinya Nakajima

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A novel technique has been developed to directly produce fine ceramic powders from liquid solution using a spray pyrolysis and fluidized bed hybrid system. Using this technique, the preparation of lithium manganese oxides LiMn2O4, which are the most promising cathode materials for lithium-ion batteries, has been carried out for various superficial gas velocities U0 = 0.30-0.91 m/s, static bed heights Ls = 50-150 mm, and medium particle sizes dpm,g = 294-498 μm. The resulting powders had spherical nano-structured particles that comprised primary particles with a few tens of nanometer in size, and they exhibited a pure cubic spinel structure without any impurities in the XRD patterns. Moreover, the as-prepared powders showed better crystallinity and smaller specific surface area than those by conventional spray pyrolysis. The effects of process parameters on powder properties, such as specific surface area and crystallinity, were investigated for a wide range of superficial gas velocities and static bed heights. An as-prepared sample was used as cathode active materials for lithium-ion batteries and the cell performance has been investigated. Test experiments in the electrochemical cell Li/1M LiClO 4 in PC/LiMn2O4 demonstrated that the sample prepared by the present technique was superior to that by the conventional spray pyrolysis and solid-state reaction method.

Original languageEnglish
Pages (from-to)2413-2421
Number of pages9
JournalAIChE Journal
Volume52
Issue number7
DOIs
Publication statusPublished - 2006 Jul
Externally publishedYes

Keywords

  • Electronic materials
  • Fluidized bed reactor
  • Lithium-ion batteries
  • Particle technology
  • Spray pyrolysis

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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