English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/56163
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

XAS study of the reversible reactivity mechanism of micro- and nanostructured electrodeposited Cu2O thin films towards lithium

AuthorsBijani, S.; Subías, G.; García, Joaquín
Issue Date2011
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Materials Chemistry 21(14): 5368-5377 (2011)
AbstractHighly uniform electrodeposited Cu2O electrodes for Li-ion batteries, with variable particle size, morphology and thickness, have been studied in the charged and discharged steps as a function of the number of cycling processes, by means of ex situ X-ray absorption spectroscopy (XAS) at the Cu K edge. Both, fingerprint analysis of the X-ray Absorption Near Edge Structure spectra (XANES) and the radial atomic distribution obtained by the analysis of the Extended X-ray Absorption Fine Structure (EXAFS) spectra, have allowed us to quantify the bimodal distribution (Cu and Cu2O) of the electrodes. These results correlate qualitatively well with their different electrochemical response, establishing a deep insight into the reversible reactivity mechanism of these films towards lithium in Li batteries. Our results demonstrate that the reversibility of the reduction process upon the number of cycles depends on the thickness, as it was suggested in previous works but also on the morphology of the electrodes. Higher reversibility corresponds to smaller thickness electrodes. For similar thickness, the reversibility is higher for porous and nanometric particle electrodes than for compact and micrometric particle electrodes. The thinnest film exhibited an increase of capacity after several recycling steps, which agrees with the increase of the Cu2O content.
Description10 páginas, 12 figuras, 3 tablas, 1 esquema.-- et al.
Publisher version (URL)http://dx.doi.org/10.1039/C0JM03565C
URIhttp://hdl.handle.net/10261/56163
DOI10.1039/C0JM03565C
ISSN0959-9428
E-ISSN1364-5501
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
XAS study of the reversible_preprint.pdf908,62 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.