Characterization of LiMn2O4 cathodes by electrochemical strain microscopy

D. O. Alikin; A. V. Ievlev; S. Yu Luchkin; A. P. Turygin; V. Ya Shur; S. V. Kalinin; A. L. Kholkin

doi:10.1063/1.4943944

Characterization of LiMn₂O₄ cathodes by electrochemical strain microscopy

D. O. Alikin, A. V. Ievlev, S. Yu Luchkin, A. P. Turygin, V. Ya Shur, S. V. Kalinin, A. L. Kholkin

Functional Atomic Force Microscopy Group

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Electrochemical strain microscopy (ESM) is a scanning probe microscopy (SPM) method in which the local electrodiffusion is probed via application of AC voltage to the SPM tip and registration of resulting electrochemical strain. Here, we implemented ESM to measure local strain in bulk LiMn₂O₄ cathodes of a commercial Li-battery in different states of charge to investigate distribution of Li-ion mobility and concentration. Ramped AC ESM imaging and voltage spectroscopy were used to find the most reliable regime of measurements allowing separating and diminishing different contributions to ESM. This is not a trivial task due to complex geometry of the sample and various obstacles resulting in less predictable contributions of different origins into ESM response: Electrostatic tip-surface interactions, charge injection, electrostriction, and flexoelectricity. Understanding and control of these contributions is an important step towards quantitative interpretation of ESM data.

Original language	English
Article number	113106
Journal	Applied Physics Letters
Volume	108
Issue number	11
DOIs	https://doi.org/10.1063/1.4943944
State	Published - Mar 14 2016

Funding

Funders	Funder number
Seventh Framework Programme	290158

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/1.4943944

Cite this

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abstract = "Electrochemical strain microscopy (ESM) is a scanning probe microscopy (SPM) method in which the local electrodiffusion is probed via application of AC voltage to the SPM tip and registration of resulting electrochemical strain. Here, we implemented ESM to measure local strain in bulk LiMn2O4 cathodes of a commercial Li-battery in different states of charge to investigate distribution of Li-ion mobility and concentration. Ramped AC ESM imaging and voltage spectroscopy were used to find the most reliable regime of measurements allowing separating and diminishing different contributions to ESM. This is not a trivial task due to complex geometry of the sample and various obstacles resulting in less predictable contributions of different origins into ESM response: Electrostatic tip-surface interactions, charge injection, electrostriction, and flexoelectricity. Understanding and control of these contributions is an important step towards quantitative interpretation of ESM data.",

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AU - Alikin, D. O.

AU - Ievlev, A. V.

AU - Luchkin, S. Yu

AU - Turygin, A. P.

AU - Shur, V. Ya

AU - Kalinin, S. V.

AU - Kholkin, A. L.

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