Degradation Analysis of LiCoO2 Positive Electrode Material of a Li-Ion Battery Using the Li K-Edge Signal Obtained from STEM-EELS Measurements

The Li distribution in positive electrode material (LiCoO2) was observed after a charge-discharge cycling test by analytical transmission electron microscopy (TEM). The electron energy-loss spectroscopy (EELS) imaging method revealed an inhomogeneous Li distribution in the LiCoO2 particles after the...

Full description

Saved in:
Bibliographic Details
Published inE-journal of surface science and nanotechnology Vol. 13; pp. 284 - 288
Main Authors Taguchi, Noboru, Sakaebe, Hikari, Tatsumi, Kuniaki, Akita, Tomoki
Format Journal Article
LanguageEnglish
Published Tokyo The Japan Society of Vacuum and Surface Science 01.01.2015
Japan Science and Technology Agency
Subjects
Cobalt oxides
Cycles
Degradation
Electrode materials
Electron energy loss spectroscopy
Electron energy-loss spectroscopy (EELS)
Electronic publishing
Imaging
Li K-edge
Li-ion battery
Rechargeable batteries
Scanning transmission electron microscopy (STEM)
Spectra
Online AccessGet full text

Cover

More Information
Summary:The Li distribution in positive electrode material (LiCoO2) was observed after a charge-discharge cycling test by analytical transmission electron microscopy (TEM). The electron energy-loss spectroscopy (EELS) imaging method revealed an inhomogeneous Li distribution in the LiCoO2 particles after the charge-discharge cycling test. Using the alternating least-squares (ALS) method for the data matrix of the EELS spectra, we obtained LiCoO2 and Li-poor LiCoO2 spectra from the LiCoO2 particles. Around the degraded LiCoO2 particles, Co3O4 and fluoride components were detected. It is suggested that inhomogeneous electrochemical reactions are one cause of LiCoO2 and electrolyte degradation. [DOI: 10.1380/ejssnt.2015.284]
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1348-0391
1348-0391
DOI:10.1380/ejssnt.2015.284