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Study of the effect of different synthesis routes on Li extraction–insertion from LiCoPO4

Bramnik, Natalia N. and Bramnik, Kirill G. and Baehtz, Carsten and Ehrenberg, Helmut (2005):
Study of the effect of different synthesis routes on Li extraction–insertion from LiCoPO4.
In: Journal of Power Sources, pp. 74-81, 145, (1), ISSN 03787753, [Online-Edition: http://dx.doi.org/10.1016/j.jpowsour.2004.12.036],
[Article]

Abstract

The electrochemical performance of LiCoPO4-based electrodes was studied in dependence on synthetic conditions. The role of particle size distribution is illustrated. Structural changes occurring at lithium extraction–insertion were explored by ex situ and in situ synchrotron XRD measurements. For the samples annealed at temperature lower than 600 °C the amorphisation of the cathode material was identified. For a high-temperature sample the two-phase character of electrochemical reaction was confirmed. The character of structural changes observed at charge and discharge is different: the two-phase reaction LiCoPO4–“CoPO4” occurs during charging, while discharge induces a strong increase of the cell volume for the Li-poor phase.

Item Type: Article
Erschienen: 2005
Creators: Bramnik, Natalia N. and Bramnik, Kirill G. and Baehtz, Carsten and Ehrenberg, Helmut
Title: Study of the effect of different synthesis routes on Li extraction–insertion from LiCoPO4
Language: English
Abstract:

The electrochemical performance of LiCoPO4-based electrodes was studied in dependence on synthetic conditions. The role of particle size distribution is illustrated. Structural changes occurring at lithium extraction–insertion were explored by ex situ and in situ synchrotron XRD measurements. For the samples annealed at temperature lower than 600 °C the amorphisation of the cathode material was identified. For a high-temperature sample the two-phase character of electrochemical reaction was confirmed. The character of structural changes observed at charge and discharge is different: the two-phase reaction LiCoPO4–“CoPO4” occurs during charging, while discharge induces a strong increase of the cell volume for the Li-poor phase.

Journal or Publication Title: Journal of Power Sources
Volume: 145
Number: 1
Uncontrolled Keywords: Phospho-olivine; Lithium batteries; In situ diffraction; Synchrotron
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B4: In situ investigations of the degradation of intercalation batteries and their modelling
Date Deposited: 15 Aug 2011 10:58
Official URL: http://dx.doi.org/10.1016/j.jpowsour.2004.12.036
Additional Information:

SFB 595 B4

Identification Number: doi:10.1016/j.jpowsour.2004.12.036
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