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LiNi0.1Mn0.1Co0.8O2 electrode material: Structural changes upon lithium electrochemical extraction

Saadoune, Ismael and Labrini, Mohamed and Yahya, Mustapha and Almaggoussi, Abdelmajid and Ehrenberg, Helmut (2010):
LiNi0.1Mn0.1Co0.8O2 electrode material: Structural changes upon lithium electrochemical extraction.
In: Electrochimica Acta, pp. 5180-5185, 55, (18), ISSN 00134686,
[Online-Edition: http://dx.doi.org/10.1016/j.electacta.2010.04.033],
[Article]

Abstract

We reported here on the synthesis, the crystal structure and the study of the structural changes during the electrochemical cycling of layered LiNi0.1Mn0.1Co0.8O2 positive electrode material. Rietveld refinement analysis shows that this material exhibits almost an ideal α-NaFeO2 structure with practically no lithium–nickel disorder. The SQUID measurements confirm this structural result and evidenced that this material consists of Ni2+, Mn4+ and Co3+ ions. Unlike LiNiO2 and LiCoO2 conventional electrode materials, there was no structural modification upon lithium removal in the whole 0.42 ≤ x ≤1.0 studied composition range. The peaks revealed in the incremental capacity curve were attributed to the successive oxidation of Ni2+ and Co3+ while Mn4+ remains electrochemically inactive.

Item Type: Article
Erschienen: 2010
Creators: Saadoune, Ismael and Labrini, Mohamed and Yahya, Mustapha and Almaggoussi, Abdelmajid and Ehrenberg, Helmut
Title: LiNi0.1Mn0.1Co0.8O2 electrode material: Structural changes upon lithium electrochemical extraction
Language: English
Abstract:

We reported here on the synthesis, the crystal structure and the study of the structural changes during the electrochemical cycling of layered LiNi0.1Mn0.1Co0.8O2 positive electrode material. Rietveld refinement analysis shows that this material exhibits almost an ideal α-NaFeO2 structure with practically no lithium–nickel disorder. The SQUID measurements confirm this structural result and evidenced that this material consists of Ni2+, Mn4+ and Co3+ ions. Unlike LiNiO2 and LiCoO2 conventional electrode materials, there was no structural modification upon lithium removal in the whole 0.42 ≤ x ≤1.0 studied composition range. The peaks revealed in the incremental capacity curve were attributed to the successive oxidation of Ni2+ and Co3+ while Mn4+ remains electrochemically inactive.

Journal or Publication Title: Electrochimica Acta
Volume: 55
Number: 18
Uncontrolled Keywords: Layered oxides; Electrode material; Lithium extraction; LiNi0.1Mn0.1Co0.8O2; Lithium-ion
Divisions: 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
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
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 15 Aug 2011 09:11
Official URL: http://dx.doi.org/10.1016/j.electacta.2010.04.033
Additional Information:

SFB 595 B4

Identification Number: doi:10.1016/j.electacta.2010.04.033
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