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On the Electroanalytical Characterization of LixCoO2, LixNiO2 and LiMn2O4 (Spinel) Electrodes in Repeated Lithium Intercalation-Deintercalation Processes

Published online by Cambridge University Press:  10 February 2011

D. Aurbach ,
M. D. Levi ,
E. Levi ,
B. Markovsky ,
G. Salitra ,
H. Teller ,
U. Heider  and
L. Heider
D. Aurbach
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
M. D. Levi
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
E. Levi
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
B. Markovsky
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
G. Salitra
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
H. Teller
Affiliation:
Department of Chemistry, Bar-Han University, Ramat-Gan 52900, Israel
U. Heider
Affiliation:
Merck KGaA/Central Service, Frankfurterstrasse 250, D-64271 Darmstadt, Germany
L. Heider
Affiliation:
Merck KGaA/Central Service, Frankfurterstrasse 250, D-64271 Darmstadt, Germany
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Abstract

This paper reports on electroanalytical studies of the intercalation-deintercalation of lithium into lithiated transition metal oxides which are used as cathodes for Li ion batteries. These include LixCoO2 LixNiO2 and LixMn2O4 spinel. The basic electroanalytical response of these systems in LiAsF6 1M/EC-DMC solutions was obtained from the simultaneous use of slow and fast scan cyclic voltammetry (SSCV), potentiostatic intermittent titration (PITT) (from which D vs. E was calculated), and impedance spectroscopy (EIS). Surface sensitive FTIR spectroscopy and XRD were also used for surface and 3D characterization, respectively. A large and important denominator was found in the electrochemical behavior of lithium intercalation-deintercalation into these transition metal oxides and graphite. The use of the electroanalytical response of these systems as a tool for the study of stabilization and failure mechanisms of these materials as cathodes in rechargeable Li batteries is demonstrated and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 496: Symposium Y – Materials For Electrochemical Energy Storage & Conversion II… , 1997 , 435
Copyright
Copyright © Materials Research Society 1998

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References

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