Temperature and potential dependence electrochemical impedance studies of LiMn2O4

Surender Kumar; Prasant Kumar Nayak; Krishnan S. Hariharan; N. Munichandraiah

doi:10.1007/s10800-013-0601-y

Temperature and potential dependence electrochemical impedance studies of LiMn₂O₄

Surender Kumar, Prasant Kumar Nayak, Krishnan S. Hariharan, N. Munichandraiah

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

5 Scopus citations

Abstract

Detailed analysis of alternating current impedance data of LiMn ₂O₄ electrodes measured at several temperatures and potentials was carried out. The Nyquist plots generally consisted of semicircles corresponding to two time constants. However, at low temperatures (-10 to 10 C) and potential region between 3.90 and 4.20 V, three time constants were present. The third semicircle present at the middle to high frequency range was attributed to electronic resistance of LiMn₂O₄. Impedance parameters were evaluated using appropriate electrical equivalent circuits. From the temperature dependence of resistive parameters, activation energy values for the corresponding processes were calculated.

Original language	English
Pages (from-to)	61-71
Number of pages	11
Journal	Journal of Applied Electrochemistry
Volume	44
Issue number	1
DOIs	https://doi.org/10.1007/s10800-013-0601-y
State	Published - Jan 2014
Externally published	Yes

Bibliographical note

Funding Information:
Acknowledgement Financial support from India Science Lab, General Motors Global R&D, is gratefully acknowledged.

Funding

Acknowledgement Financial support from India Science Lab, General Motors Global R&D, is gratefully acknowledged.

Funders	Funder number
India Science Lab, General Motors Global R&D

Keywords

Activation energy
Cathode material
Electronic resistance
Impedance
Lithium-ion battery

UN SDGs

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

Access to Document

10.1007/s10800-013-0601-y

Cite this

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abstract = "Detailed analysis of alternating current impedance data of LiMn 2O4 electrodes measured at several temperatures and potentials was carried out. The Nyquist plots generally consisted of semicircles corresponding to two time constants. However, at low temperatures (-10 to 10 C) and potential region between 3.90 and 4.20 V, three time constants were present. The third semicircle present at the middle to high frequency range was attributed to electronic resistance of LiMn2O4. Impedance parameters were evaluated using appropriate electrical equivalent circuits. From the temperature dependence of resistive parameters, activation energy values for the corresponding processes were calculated.",

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author = "Surender Kumar and Nayak, {Prasant Kumar} and Hariharan, {Krishnan S.} and N. Munichandraiah",

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AU - Munichandraiah, N.

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AB - Detailed analysis of alternating current impedance data of LiMn 2O4 electrodes measured at several temperatures and potentials was carried out. The Nyquist plots generally consisted of semicircles corresponding to two time constants. However, at low temperatures (-10 to 10 C) and potential region between 3.90 and 4.20 V, three time constants were present. The third semicircle present at the middle to high frequency range was attributed to electronic resistance of LiMn2O4. Impedance parameters were evaluated using appropriate electrical equivalent circuits. From the temperature dependence of resistive parameters, activation energy values for the corresponding processes were calculated.

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