Cr and V Substitution in the LiMn₂O₄Spinel Positive Electrode Li-Ion Batteries

• Authors: A. Akbulut , T. Cetinkaya , M. Guler , M. Uysal , H. Akbulut
• Languages of publication: EN

Abstracts

EN

In this study, LiCr_{0.2}V_{0.4}Mn_{1.4}O₄ cathode active electrode materials were produced via a facile sol-gel method at 800°C. The surfaces of the LiCr_{0.2}V_{0.4}Mn_{1.4}O₄ cathode active electrode materials were then coated with Cu in order to increase the conductivity and suppress the manganese ion dissolution into the electrolyte. The structure and electrochemical properties of the obtained Cr and V substituted LiMn₂O₄ powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), galvanostatic charge- discharge test and electrochemical impedance spectroscopy (EIS). The improvement in the cycling performances attributed to stabilization of spinel structure by bication ion substation and Cu coating on the spinel particles. EIS analysis confirmed that bication doping and conductive Cu coating contributed stability of the spinel electrodes and provided stable electrolyte/electrode interface due to the suppression of electrolyte decomposition

Keywords

EN

82.47.Aa; 81.20.Fw; 81.15.-z

Discipline

• 81.20.Fw: Sol-gel processing, precipitation(for reactions in sol-gels, see 82.33.Ln; for sol-gels as disperse system, see 82.70.Gg)
• 82.47.Aa: Lithium-ion batteries
• 81.15.-z: Methods of deposition of films and coatings; film growth and epitaxy(for structure of thin films, see 68.55.-a; see also 85.40.Sz Deposition technology in microelectronics; for epitaxial dielectric films, see 77.55.Px)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 4
• Pages: 1019-1022

Dates

published

2015-04

Contributors

author

A. Akbulut

• Sakarya University, Dept. of Environmental Engineering, Esentepe Campus, 54187 Sakarya, Turkey

author

T. Cetinkaya

• Sakarya University, Metallurgy and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey

author

M. Guler

• Sakarya University, Metallurgy and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey

author

M. Uysal

• Sakarya University, Metallurgy and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey

author

H. Akbulut

• Sakarya University, Metallurgy and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey

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Identifiers

DOI

10.12693/APhysPolA.127.1019