Affiliation:
1. Vasyl Stefanyk Precarpathian National University
Abstract
Mesoporous maghemite γ-Fe2O3 was obtained by thermal decomposition of iron citrate xerogel hydrate. The influence of precursor molar concentration and calcination temperature on the material phase composition, morphology, crystalline and magnetic microstructure, surface condition and optical properties was studied. The model of mesoporous γ-Fe2O3 formation is proposed. Obtained maghemite was tested as cathode material for lithium power sources. Increase of lithium power sources specific capacity and energy with the samples specific surface area enlarging is determined. Two kinetic processes are observed during discharge processes: lithium accumulation at the cathode material/electrolyte interface and diffusion of lithium ions into the material crystal structure. The diffusion coefficients of lithium in the cathode material on the different stages of discharge process are calculated.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference6 articles.
1. V.O. Kotsyubynsky, V.V. Moklyak, A.B. Hrubiak, Mesoporous γ-Fe2O3: synthesys and properties, in: 23rd Annual Meeting of MRS-J: Advanced Materials Researches Breakthrough to the Innovations for Ecology and Energy, Yokohama, 2013, p.18.
2. B. Sun, J. Horvat, H. Soo Kim, W. -S. Kim, J. Ahn and G. Wang, Synthesis of mesoporous α-Fe2O3 nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries, J. Phys. Chem. C. 114 (2010) 18753-18761.
3. K.A. Malini, M.R. Anantharaman, A. Gupta, Low temperature Mossbauer studies on magnetic nanocomposites, Bull. Mater. Sci. 27 (2004) 361-366.
4. M. Preisinger, M. Krispin, T. Rudolf, S. Horn, D. R. Strongin, Electronic structure of nanoscale iron oxide particles measured by scanning tunneling and photoelectron spectroscopies J. Phys. Rev. 71 (2005) 5409.
5. V.O. Kotsyubynsky, V.V. Moklyak, A.B. Hrubiak, Structural and optical properties nanodispersed maghemite was obtained by a modified sol-gel method, Nanostructure materials science. 1 (2013) 3-11.
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