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Electrochemical Investigation of Lithium Intercalation in MOCVD Derived Nanostructured Anatase/Rutile TiO

Graczyk-Zając, Magdalena and Lazar, Ana Maria and Chaumont, Denis and Sacilotti, Marco and Riedel, Ralf (2011):
Electrochemical Investigation of Lithium Intercalation in MOCVD Derived Nanostructured Anatase/Rutile TiO.
35, In: ecsTransactions, (34), The Electrochemical Society, pp. 207-213, ISSN 19385862, DOI: 10.1149/1.3654219,
[Online-Edition: https://doi.org/10.1149/1.3654219],
[Article]

Abstract

In this paper we report on the lithium reversible storage in titanium dioxide (TiO2) prepared by metal-organic chemical vapor deposition (MOCVD). Electrochemical properties in terms of lithium reversible insertion depend on the deposited microstructure. For thick films deposited on silicon wafer electrochemical activity of the anatase type of TiO2 is registered in the potential range 1.8-2.1 V vs. Li. For thinner films the intercalation reaction takes place in two potential ranges: 1.8-2.1 V vs. Li and below 1.4 V vs. Li. The second electroactivity range is attributed to lithium insertion into rutile. We found that the decrease of the lower potential limit (0.5 V instead of commonly used 1 V) leads to an increase of the recovered capacity. In consequence the investigated MOCVD TiO2 demonstrates high reversible capacity of about 300 mAhg-1.

Item Type: Article
Erschienen: 2011
Creators: Graczyk-Zając, Magdalena and Lazar, Ana Maria and Chaumont, Denis and Sacilotti, Marco and Riedel, Ralf
Title: Electrochemical Investigation of Lithium Intercalation in MOCVD Derived Nanostructured Anatase/Rutile TiO
Language: English
Abstract:

In this paper we report on the lithium reversible storage in titanium dioxide (TiO2) prepared by metal-organic chemical vapor deposition (MOCVD). Electrochemical properties in terms of lithium reversible insertion depend on the deposited microstructure. For thick films deposited on silicon wafer electrochemical activity of the anatase type of TiO2 is registered in the potential range 1.8-2.1 V vs. Li. For thinner films the intercalation reaction takes place in two potential ranges: 1.8-2.1 V vs. Li and below 1.4 V vs. Li. The second electroactivity range is attributed to lithium insertion into rutile. We found that the decrease of the lower potential limit (0.5 V instead of commonly used 1 V) leads to an increase of the recovered capacity. In consequence the investigated MOCVD TiO2 demonstrates high reversible capacity of about 300 mAhg-1.

Journal or Publication Title: ecsTransactions
Volume: 35
Number: 34
Publisher: The Electrochemical Society
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 > Dispersive Solids
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 > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A4: Novel functional ceramics using anionic substitution in oxidic systems
Date Deposited: 31 Jan 2012 14:24
DOI: 10.1149/1.3654219
Official URL: https://doi.org/10.1149/1.3654219
Additional Information:

SFB 595 A4

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