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Synthesis of LiFePO4 powder by the organic–inorganic steric entrapment method

Published online by Cambridge University Press:  27 July 2015

Daniel Ribero Open the ORCID record for Daniel Ribero [Opens in a new window]  and
Waltraud M. Kriven
Daniel Ribero
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Illinois 61801, USA
Waltraud M. Kriven*
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Illinois 61801, USA
*
a)Address all correspondence to this author. e-mail: kriven@illinois.edu
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Abstract

A nanoscale and pure, olivine-structured LiFePO4 was synthesized at ∼300 °C using an organic–inorganic steric entrapment method. Normally, when calcined and crystallized in air, this method leads to the synthesis of compounds where the cations are in their highest oxidation state. However, in this study, we found a way to produce compounds having lower oxidation states (e.g., compounds containing Fe2+), which may have wider applications in the synthesis of other compounds with complex chemistry that have variable oxidation states and, therefore, potential applications in electronic ceramics. The resulting LiFePO4 or (Li2O·2FeO·P2O5) was characterized by thermogravimetric analysis/differential thermal analysis, x-ray diffractometry, scanning electron microscopy, transmission electron microscopy, inductively coupled plasma emission spectroscopy, specific surface area by Brunauer–Emmett–Teller nitrogen absorption, and particle size analysis.

Keywords

powder processingnanostructureoxidescombustion synthesisparticulates
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 14 , 28 July 2015 , pp. 2133 - 2143
Copyright
Copyright © Materials Research Society 2015 

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