Document Detail


Compositional Tuning of Structural Stability of Lithiated Cubic Titania via a Vacancy-Filling Mechanism under High Pressure.
MedLine Citation:
PMID:  25166416     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Experimental and theoretical studies on the compositional dependence of stability and compressibility in lithiated cubic titania are presented. The crystalline-to-amorphous phase transition pressure increases monotonically with Li concentration (from ∼17.5  GPa for delithiated to no phase transition for fully lithiated cubic titania up to 60 GPa). The associated enhancement in structural stability is postulated to arise from a vacancy filling mechanism in which an applied pressure drives interstitial Li ions to vacancy sites in the oxide interior. The results are of significance for understanding mechanisms of structural response of metal oxide electrode materials at high pressures as well as emerging energy storage technologies utilizing such materials.
Authors:
Hui Xiong; Handan Yildirim; Paul Podsiadlo; Jun Zhang; Vitali B Prakapenka; Jeffrey P Greeley; Elena V Shevchenko; Kirill K Zhuravlev; Sergey Tkachev; Subramanian K R S Sankaranarayanan; Tijana Rajh
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Publication Detail:
Type:  Journal Article     Date:  2013-02-13
Journal Detail:
Title:  Physical review letters     Volume:  110     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2014-08-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  078304     Citation Subset:  IM    
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