Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102367
Title: Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
Authors: Luchkin, S. Y.
Romanyuk, K.
Ivanov, M.
Kholkin, A. L.
Issue Date: 2015
Publisher: American Institute of Physics Inc.
Citation: Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy / S. Y. Luchkin, K. Romanyuk, M. Ivanov, et al. — DOI 10.1063/1.4927816 // Journal of Applied Physics. — 2015. — Vol. 118. — Iss. 7. — 072016.
Abstract: Transport properties of Li+ mobile ions in fresh and aged LiMn2O4 battery cathodes were studied at the nanoscale via electrochemical strain microscopy (ESM), time spectroscopy, and voltage spectroscopy mapping. Both Vegard and plausible non-Vegard contributions to the ESM signal were identified in electrochemical hysteresis loops obtained on fresh and aged samples. In the fresh cathodes, the Vegard contribution dominates the signal, while in the aged samples different shape of hysteresis loops indicates an additional plausible non-Vegard contribution. Non-uniform spatial distribution of the electrochemical loop opening in LiMn2O4 particles studied in the aged samples indicates stronger variation of the Li diffusion coefficient at the microscale as compared to the fresh specimens. Time spectroscopy measurements revealed a suppression of the local Li diffusivity in aged samples. The mechanisms of the cathode aging are discussed in the context of observed nanoscale ESM response. © 2015 AIP Publishing LLC.
Keywords: ELECTRODES
HYSTERESIS
HYSTERESIS LOOPS
LITHIUM
LITHIUM ALLOYS
NANOTECHNOLOGY
SPECTROMETERS
DIFFERENT SHAPES
ELECTROCHEMICAL STRAIN MICROSCOPIES
LI DIFFUSION
LI DIFFUSIVITY
MOBILE IONS
NANO SCALE
NON-UNIFORM
TIME SPECTROSCOPY
CATHODES
URI: http://hdl.handle.net/10995/102367
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84939789746
PURE ID: 314243
22031ccf-ba59-46e2-b586-41065ffed202
ISSN: 218979
DOI: 10.1063/1.4927816
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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