Study of the effect of different synthesis routes on Li extraction-insertion from LiCoPO4

The electrochemical performance of LiCoPO4-based electrodes was studied in dependence on synthetic conditions. The role of particle size distribution is illustrated. Structural changes occurring at lithium extraction-insertion were explored by ex situ and in situ synchrotron XRD measurements. For th...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2005-07, Vol.145 (1), p.74-81
Main Authors: BRAMNIK, Natalia N, BRAMNIK, Kirill G, BAEHTZ, Carsten, EHRENBERG, Helmut
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The electrochemical performance of LiCoPO4-based electrodes was studied in dependence on synthetic conditions. The role of particle size distribution is illustrated. Structural changes occurring at lithium extraction-insertion were explored by ex situ and in situ synchrotron XRD measurements. For the samples annealed at temperature lower than 600 deg C the amorphisation of the cathode material was identified. For a high-temperature sample the two-phase character of electrochemical reaction was confirmed. The character of structural changes observed at charge and discharge is different: the two-phase reaction LiCoPO4-'CoPO4' occurs during charging, while discharge induces a strong increase of the cell volume for the Li-poor phase.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2004.12.036