Defect chemistry of lithium storage in TiO2 as a function of oxygen stoichiometry

We investigate the point defect chemistry of lithium storage in TiO2 and emphasize its great importance to lithium battery applications. Not only charge carrier concentration but also lithium diffusivity is successfully interpreted in terms of lithium content and activity as well as oxygen stoichiom...

Full description

Saved in:
Bibliographic Details
Published inSolid state ionics Vol. 225; pp. 590 - 593
Main Authors Shin, Ji-Yong, Samuelis, Dominik, Maier, Joachim
Format Journal Article
LanguageEnglish
Published Elsevier B.V 04.10.2012
Subjects
Charge carrier
Chemical analysis
Defect chemistry
Defects
Diffusivity
Lithium
Lithium batteries
Lithium battery
Lithium diffusivity
Oxides
Stoichiometry
TiO2
Titanium dioxide
Lithium battery
Lithium diffusivity
Defect chemistry
Charge carrier
TiO2
Online AccessGet full text

Cover

More Information
Summary:We investigate the point defect chemistry of lithium storage in TiO2 and emphasize its great importance to lithium battery applications. Not only charge carrier concentration but also lithium diffusivity is successfully interpreted in terms of lithium content and activity as well as oxygen stoichiometry. A detailed defect chemical analysis reveals that ionic-electronic defect associations (Lii•+e′⇌LiiX and VO••+2e′⇌VO•+e′⇌VOX) play a significant role in determining the concentration of defects and lithium diffusivity, and hence can have large impact on overall lithium storage performance of oxide based electrode materials. ► The point defect chemistry of Li storage in titania is investigated. ► The ionic/electronic defect association is important for Li transport and storage. ► Li transport and storage are governed by the point defect chemistry.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2011.12.003