In situ X-ray absorption spectroscopic investigation of the electrochemical conversion reactions of CuF2-MoO3 nanocomposite

Title
In situ X-ray absorption spectroscopic investigation of the electrochemical conversion reactions of CuF2-MoO3 nanocomposite
Authors
A.N. MansourF.Badway윤원섭정경윤G.G.Amatucci
Keywords
Copper fluorides; Conversion reactions; Energy storage; X-ray absorptionspectroscopy; Redox couple; Lithium batteries; Nanocomposite
Issue Date
2010-12
Publisher
Journal of solid state chemistry
Citation
VOL 183, NO 12, 3029-3038
Abstract
We have used X-ray absorption spectroscopy at the Cu K-edge to investigate the electrochemical conversion reaction of 20 nm size 85 wt% CuF2−15 wt% MoO3 nanocomposite under in situ conditions. The nanocomposite was prepared by high energy milling. Upon discharge, the lithiation reaction with the nanocomposite resulted in the formation of nanophase metallic Cu, which is consistent with the conversion of CuF2 into Cu and LiF. Based on XANES and Fourier transforms of EXAFS spectra, we show that the discharge process proceeded via the formation of highly dispersed Cu particles. Based on the coordination number of the first shell of Cu, the average size of the Cu particles was estimated to be in the 1–3 nm range in the fully discharged state.
URI
http://pubs.kist.re.kr/handle/201004/39761
ISSN
0022-4596
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE