EVOLUTION OF MICROSTRUCTURE AND PHASE COMPOSITION UPON ANNEALING OF LiFePO4 PREPARED BY A LOW TEMPERATURE METHOD-Reference-Cited by-同舟云学术

EVOLUTION OF MICROSTRUCTURE AND PHASE COMPOSITION UPON ANNEALING OF LiFePO4 PREPARED BY A LOW TEMPERATURE METHOD

Published:2011-06 Issue:02 Volume:04 Page:117-122
ISSN:1793-6047
Container-title:Functional Materials Letters
language:en
Short-container-title:Funct. Mater. Lett.

Author:

ZAJAC W.¹,MARZEC J.¹,MAZIARZ W.²,RAKOWSKA A.²³,MOLENDA J.¹

Affiliation:

1. Department of Hydrogen Energy, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

2. Institute of Metallurgy and Materials Science of the Polish Academy of Sciences, ul. Reymonta 25, 30-059 Kraków, Poland

3. Department of Solid State Chemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

Abstract

The effect of annealing of nanosized LiFePO 4 powder on microstructure, phase composition, iron valence state and electrical conductivity has been studied. Careful microstructural characterization of the as-prepared powder using high resolution TEM revealed presence of {010}-type crystal planes at the surface of crystallites, which seem to be beneficial to electrochemical activity. The second part of the work is focused on explanation of presence and evolution of Fe 3+ detected in the material. Transmission and CEMS modes of Mössbauer spectroscopy together with TEM allowed for ruling out concept of amorphous layers containing Fe 3+ ions covering crystalline LiFePO 4 grains.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Materials Science

Link

https://www.worldscientific.com/doi/pdf/10.1142/S1793604711001798

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