Investigation of the Electrochemical Properties of 3D Recyclable Aluminium doped LiMn2O4 Electrode: Improved Power and Energy Densities for Lithium-ion Battery Usage
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Abstract
The Composites of Al-Doped LiMn2O4; Al0.1:(LiMn2O4)0.9 and AI0.3:(LiMn2O4)0.7, were prepared using the hydrothermal method and drop casting deposition technique. The electrochemical performance of the Al-doped LiMn2O4 composite as a promising anode material for lithium-ion batteries was characterised by cyclic voltammetry analysis, electrochemical impedance spectroscopy and galvanostatic charge discharge analysis. The anodes' material exhibits a reversible capacity loss, which can be primarily linked to reverse reactions within the solid electrolyte interface formation, aluminium adsorption in the conducting LiMn2O4, and the electrolyte's electrochemical breakdown. The charges that are retained in the anode material during charging showed a linear decline in charge capacity as charging current intensity increased. Ionic polarisation was the reason for the observed drop in the charge and discharge capabilities at the current density of 5 A/g. Having greater specific capacitance and energy density, the composite Al0.1:(LiMn2O4)0.9, is a better anode material for electrochemical applications compared to Al0.3:(LiMn2O4)0.7, also its comparatively higher power density at a scan rate of 5 mV/s is mostly explained by its lower equivalent series resistance.
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