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Kinetic study of LiMn2O4 cathodes by in situ XRD with constant-current cycling and potential stepping
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0001-9203-9313
2002 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, Vol. 149, no 9, A1164-A1170 p.Article in journal (Refereed) Published
Abstract [en]

The structure and kinetics of LiMn2O4 electrodes have been investigated by in situ X-ray diffraction (XRD) measurements using a novel three-electrode in situ XRD cell, where the reference electrode is sited on the reverse side of the working electrode to facilitate accurate determination of the electrode potential. The use of ballmilling during electrode preparation resulted in a high level of utilization at high charge/discharge rates of LiMn2O4-based electrodes in both structural and electrochemical studies. No evidence of Li concentration gradients in the solid material could be observed from XRD, thus excluding solid-phase diffusion and also phase boundary movement, as described by Fick's law, as the rate-limiting step.

Place, publisher, year, edition, pages
2002. Vol. 149, no 9, A1164-A1170 p.
Keyword [en]
x-ray-diffraction, rechargeable lithium batteries, electrochemically delithiated limn2o4, in-situ, electrode materials, current transient, ion batteries, spinel phase, transport, intercalation
URN: urn:nbn:se:kth:diva-21815DOI: 10.1149/1.1497170ISI: 000177404600010OAI: diva2:340513
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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