On the surface chemistry of LiMO2 cathode materials (M= [MnNi] and [MnNiCo]): Electrochemical, spectroscopic, and calorimetric studies

Ortal Haik, Nicole Leifer, Zvi Samuk-Fromovich, Ella Zinigrad, Boris Markovsky, Liraz Larush, Yossi Goffer, Gil Goobes, Doron Aurbach*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

This study examined the aging mechanisms of layered cathode materials for lithium batteries upon exposure to air and the influence of this aging on the thermal stability and electrochemical performance of these materials composed of solid solutions of LiMO2 (M= [MnNi] or [MnNiCo]) in Li cells. A unique methodology for the quantitative characterization of surface carbonates on LiMO2 compounds based on differential scanning calorimeter (DSC) measurements was developed. Correlations were made between the formation of Li2 CO3 and other carbonates on the surface of the lithiated metal oxide powders and the changes in the structure and electrochemical performance of the cathode materials. The techniques used included solid-state NMR, X-ray photelectron spectroscopy, Fourier transform IR, high resolution scanning electron microscopy, high resolution transmission electron microscopy and the thermal analysis, DSC, and accelerating rate calorimetry in conjunction with electrochemical measurements.

Original languageAmerican English
Pages (from-to)A1099-A1107
JournalJournal of the Electrochemical Society
Volume157
Issue number10
DOIs
StatePublished - 2010
Externally publishedYes

Fingerprint

Dive into the research topics of 'On the surface chemistry of LiMO2 cathode materials (M= [MnNi] and [MnNiCo]): Electrochemical, spectroscopic, and calorimetric studies'. Together they form a unique fingerprint.

Cite this