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Structural transitions in positive electrodes for Li-ion batteries the vibronic approach

Structural transitions in positive electrodes for Li-ion batteries the vibronic approach We present the vibrational properties of manganese dioxides and lithiated oxides with either spinel-type and layered-type structure used as positive electrodes in Li-ion batteries. The local structure in γ-MnO2 is investigated as a function of the intergrowth rate, Pr, of pyrolusite in the ramsdellite matrix and the phase evolution as a function of the degree of intercalation or deintercalation in 4-volt electrode materials Li1−xCoO2 and Li1−xMn2O4. Lattice dynamics are studied using either a classical group theoretical analysis or a local environment model. Raman and FTIR bands are identified on the basis of vibrational modes of polyhedral units which are building the structure. Structural modifications induced by intercalation-deintercalation process are examined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Structural transitions in positive electrodes for Li-ion batteries the vibronic approach

Ionics , Volume 8 (2) – Mar 22, 2006

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References (45)

Publisher
Springer Journals
Copyright
Copyright © 2002 by IfI - Institute for Ionics
Subject
Chemistry; Biomedicine general; Analytical Chemistry; Physical Chemistry; Electrochemistry; Optical and Electronic Materials
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/BF02377748
Publisher site
See Article on Publisher Site

Abstract

We present the vibrational properties of manganese dioxides and lithiated oxides with either spinel-type and layered-type structure used as positive electrodes in Li-ion batteries. The local structure in γ-MnO2 is investigated as a function of the intergrowth rate, Pr, of pyrolusite in the ramsdellite matrix and the phase evolution as a function of the degree of intercalation or deintercalation in 4-volt electrode materials Li1−xCoO2 and Li1−xMn2O4. Lattice dynamics are studied using either a classical group theoretical analysis or a local environment model. Raman and FTIR bands are identified on the basis of vibrational modes of polyhedral units which are building the structure. Structural modifications induced by intercalation-deintercalation process are examined.

Journal

IonicsSpringer Journals

Published: Mar 22, 2006

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