Synthesis of nanostructured LiM0.15Mn1.85 5O4 (M = Mn, Co, Al, and Fe) particles by spray pyrolysis in a fluidized bed reactor

Izumi Taniguchi, Shinya Nakajima, Zhumabay Bakenov

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel technique has been developed to directly produce fine ceramic powders from liquid solution via spray pyrolysis in a fluidized bed reactor (SPFBR). Using this technique the preparation of LiM0.15Mn1.85O4 (M = Mn, Co, Al, and Fe), which are the most promising cathode materials for lithium-ion batteries, has been carried out at a superficial velocity U0 of 0.71 m/s, a reactor temperature T of 800°C, and a static bed height Ls of 100 mm. The as-prepared powders were spherical nanostructured particles that comprised primary particles of a few tens of nanometers in size, and they exhibited a pure cubic spinel structure without any impurities in the XRD patterns. The chemical composition of as-prepared samples showed good agreement with the theoretical values that proved stoichiometric formulae of the compounds. The specific surface area of as-prepared LiM0.15Mn1.85 O4 (M = Mn, Co, Al, and Fe) powders decreases with increasing the static bed height in each doping metal, while the crystallite size increases with the static bed height. As a result, the as-prepared powders showed larger crystallite size and smaller specific surface area than those prepared by conventional spray pyrolysis.

Original languageEnglish
Pages (from-to)1292-1301
Number of pages10
JournalChemical Engineering Communications
Volume195
Issue number10
DOIs
Publication statusPublished - Sep 1 2008

Keywords

  • Cathode
  • Fluidized bed reactor
  • Lithium-ion batteries
  • Nanostructured particles
  • Spray pyrolysis
  • Substituted manganese spinels

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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