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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 18, Number 6
BKCSDE 18(6)
June 20, 1997 

 
Title
Preparation and Characterization of LiMn2O4 Powder by Combustion of Poly(ethylene glycol)-Metal Nitrate Precursor
Author
Hyu-Bum Park, Young-Sik Hong, Ji-Eun Yi, Ho-Jin Kweon, Si-Joong Kim
Keywords
Abstract
LiMn2O4 powders were prepared by burning and subsequent calcination of PEG-metal nitrate precursor. After the burning stage of the precursor, some minor phases such as Mn2O3 (or Mn3O4), MnO, and carbonate were formed and single phases of LiMn2O4 were obtained by further calcinations above 400 ℃. From thermal analysis of the precursor, a violent thermal decomposition, which was indicated by a drastic weight loss accompanied by a sharp and strong exothermic peak, was observed and probably caused by an oxidation-reduction reaction between oxidizer and fuel. The formation of the minor phases could be explained in terms of the burning behavior of the precursor by employing valence concepts of propellant chemistry. The calcined powders were composed of submicron-sized but highly agglomerated particles and showed very broad particle size distribution.
Page
612 - 618
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