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Photoelectron Spectroscopic Study of the Reaction of Li and Na with NiCo2O4

Thißen, Andreas and Ensling, David and Fernández-Madrigal, Francisco Javier and Jaegermann, Wolfram and Alcántara, Ricardo and Lavela, Pedro and Tirado, José L. :
Photoelectron Spectroscopic Study of the Reaction of Li and Na with NiCo2O4.
[Online-Edition: http://dx.doi.org/10.1021/cm051138p]
In: Chemistry of Materials, 17 (20) pp. 5202-5208. ISSN 0897-4756
[Article] , (2005)
Note:

SFB 595 A3

Official URL: http://dx.doi.org/10.1021/cm051138p

Abstract

The in situ chemical reaction of NiCo2O4 with Li and Na by physical vapor deposition is studied by using high-resolution X-ray photoelectron spectroscopy. The thermal decomposition of the mixed oxalate precursors at 320 °C allows the formation of NiCo2O4 as nanosized domains. The small particle size facilitates the reaction with Li and Na. During the first steps of the reaction of NiCo2O4 with both alkali metals, the reduction of both Ni3+ and Co3+ to the divalent state is demonstrated by XP spectroscopic data. The mechanism of the first steps of the reaction has been unfolded. A first intercalation reaction of the alkali ions in the spinel host structure occurs. In a second step, sodium oxide or lithium oxide is formed, as well as the monoxides.

Item Type: Article
Erschienen: 2005
Creators: Thißen, Andreas and Ensling, David and Fernández-Madrigal, Francisco Javier and Jaegermann, Wolfram and Alcántara, Ricardo and Lavela, Pedro and Tirado, José L.
Title: Photoelectron Spectroscopic Study of the Reaction of Li and Na with NiCo2O4
Language: English
Abstract:

The in situ chemical reaction of NiCo2O4 with Li and Na by physical vapor deposition is studied by using high-resolution X-ray photoelectron spectroscopy. The thermal decomposition of the mixed oxalate precursors at 320 °C allows the formation of NiCo2O4 as nanosized domains. The small particle size facilitates the reaction with Li and Na. During the first steps of the reaction of NiCo2O4 with both alkali metals, the reduction of both Ni3+ and Co3+ to the divalent state is demonstrated by XP spectroscopic data. The mechanism of the first steps of the reaction has been unfolded. A first intercalation reaction of the alkali ions in the spinel host structure occurs. In a second step, sodium oxide or lithium oxide is formed, as well as the monoxides.

Journal or Publication Title: Chemistry of Materials
Volume: 17
Number: 20
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Surface Science
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 > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A3: Boundary layers and thin films of ionic conductors: Electronic structure, electrochemical potentials, defect formation and degradation mechanisms
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 04 Aug 2011 09:31
Official URL: http://dx.doi.org/10.1021/cm051138p
Additional Information:

SFB 595 A3

Identification Number: doi:10.1021/cm051138p
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