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Conditioning of Li(Ni,Co)O2 Cathode Materials for Rechargeable Batteries During the First Charge-Discharge Cycles

Ehrenberg, Helmut and Nikolowski, Kristian and Bramnik, Natalia N. and Baehtz, Carsten and Buhrmester, Thorsten and Gross, Toni André (2005):
Conditioning of Li(Ni,Co)O2 Cathode Materials for Rechargeable Batteries During the First Charge-Discharge Cycles.
In: Advanced Engineering Materials, pp. 932-935, 7, (10), ISSN 1438-1656, [Online-Edition: http://dx.doi.org/10.1002/adem.200500116],
[Article]

Abstract

As-prepared Li(Ni,Co)O2 with good electrochemical performance is an insulator with low degree of cation disorder, i.e. Li and (Ni,Co) are distributed on different and alternating layers. Lithium extraction in the first cycle induces an irreversible first-order phase transition into a metallic phase with a discontinuous change in the c/a ratio by 3.6% and an accompanied partial occupation of some of the vacant Li-sites by Ni-ions. The specific arrangement of those Ni-ions on Li-layers is proposed as a key feature for the good cycling behaviour of Li(Ni,Co)O2 based cathodes in rechargeable batteries.

Item Type: Article
Erschienen: 2005
Creators: Ehrenberg, Helmut and Nikolowski, Kristian and Bramnik, Natalia N. and Baehtz, Carsten and Buhrmester, Thorsten and Gross, Toni André
Title: Conditioning of Li(Ni,Co)O2 Cathode Materials for Rechargeable Batteries During the First Charge-Discharge Cycles
Language: English
Abstract:

As-prepared Li(Ni,Co)O2 with good electrochemical performance is an insulator with low degree of cation disorder, i.e. Li and (Ni,Co) are distributed on different and alternating layers. Lithium extraction in the first cycle induces an irreversible first-order phase transition into a metallic phase with a discontinuous change in the c/a ratio by 3.6% and an accompanied partial occupation of some of the vacant Li-sites by Ni-ions. The specific arrangement of those Ni-ions on Li-layers is proposed as a key feature for the good cycling behaviour of Li(Ni,Co)O2 based cathodes in rechargeable batteries.

Journal or Publication Title: Advanced Engineering Materials
Volume: 7
Number: 10
Uncontrolled Keywords: Battery materials; Cathode materials ; Synchrotron diffraction
Divisions: 11 Department of Materials and Earth Sciences
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 10:53
Official URL: http://dx.doi.org/10.1002/adem.200500116
Additional Information:

SFB 595 B4

Identification Number: doi:10.1002/adem.200500116
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