Atomic force microscopy studies of surface and dimensional changes in LixCoO2 crystals during lithium de-intercalation

An in situ electrochemical atomic force microscopy (EC-AFM) cell was developed to study surface and dimensional changes of individual LixCoO2 crystals during lithium de-intercalation. Discrete Li2CO3 particles having 50-250nm in diameter and 5-15nm in height were observed on the surface of stoichiom...

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Bibliographic Details
Published in:Electrochimica acta 2007-03, Vol.52 (13), p.4572-4580
Main Authors: CLEMENCON, A, APPAPILLAI, A. T, KUMAR, S, SHAO-HORN, Y
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
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Summary:An in situ electrochemical atomic force microscopy (EC-AFM) cell was developed to study surface and dimensional changes of individual LixCoO2 crystals during lithium de-intercalation. Discrete Li2CO3 particles having 50-250nm in diameter and 5-15nm in height were observed on the surface of stoichiometric LiCoO2 crystals and they were shown to gradually dissolve into the LiPF6-containing electrolyte. The dimensional change of individual LixCoO2 crystals along the chex. axis was monitored in situ during lithium de-intercalation. Evidence of surface instability or structural instability was not found in LixCoO2 single crystals upon de-intercalation to 4.2V versus Li.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.12.076