The Effect of Calcination Temperature on the Electrochemical Performance of ZnO Coated LiMn2O4/MWCNT Nanocomposite Cathodes

A. Akbuluta, T. Cetinkayab, M.O. Gulerb and H. Akbulutb aSakarya University, Dept. of Environmental Engineering, Esentepe Campus, 54187, Sakarya, Turkey bSakarya University, Metallurgy and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey

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In this study, it is aimed to develop LiMn2O4/MWCNT nanocomposite cathode materials by using different calcination temperatures (300, 500, 700°C). The aim of using MWCNTs in the active material is to overcome poor conductivity and to increase stability of the electrodes during charging and discharging. The nanocomposites were produced by sol-gel method, which allows producing very fine particle size of LiMn2O4. LiMn2O4 and LiMn2O4/MWCNT were uniformly coated on an Al-foil to obtain 500 μm thicknesses with a specific amount of binder and conducting agent. The surfaces of cathodes were coated with ZnO by using magnetron sputtering PVD with a thickness of 10 nm. Coin-type (CR2016) test cells were assembled, directly using the LiMn2O4/MWCNTs and surface coated LiMn2O4/MWCNTs as anode and a lithium metal foil as the counter electrode.

DOI: 10.12693/APhysPolA.125.331 PACS numbers: 82.47.Aa, 81.05.Mh, 81.20.Fw, 68.47.Gh