Characterization of LiMn2O4 cathodes by electrochemical strain microscopy

被引：25

作者：

Alikin, D. O. ^{[1
]}

Ievlev, A. V. ^{[2
,3
]}

Luchkin, S. Yu. ^{[4
,5
]}

Turygin, A. P. ^{[1
]}

Shur, V. Ya. ^{[1
]}

Kalinin, S. V. ^{[2
,3
]}

Kholkin, A. L. ^{[1
,4
,5
]}

机构：

[1] Ural Fed Univ, Inst Nat Sci, 51 Lenin Ave, Ekaterinburg 620000, Russia

[2] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Inst Funct Imaging Mat, Oak Ridge, TN 37831 USA

[4] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal

[5] Univ Aveiro, CICECO, Aveiro Inst Mat, P-3810193 Aveiro, Portugal

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 11期

关键词：

SCANNING PROBE MICROSCOPIES;

D O I：

10.1063/1.4943944

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2016 AIP Publishing LLC.

引用

页数：5

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