Na-rich cathode materials prepared by electrochemical ion exchange coated by alumina Derivatives

The variety of practical batteries has enlarged during the last 30 years. Environment pollution and resource shortage are major problems. Applications for traditional and new practical battery systems are increasing and the market for lithium-ion batteries has grown remarkably. Lithium is a limited resource compare to high abundance in Earth’s crust of sodium and these costs are derived from their prevalence. Given the increased demand for battery-powered devices, energy storage requires to find an alternative to lithium. In recent years, increase interest in cathode layered materials have been extensively studied and are considered to be one of the most promising cathodes material candidates for next-generation Na-ion batteries. Previous studies have shown a synthesis of Na rich cathode materials by ion exchange, which relies on Li and Mn-rich NCM (Li_1+xMn_0.54Co_0.13Ni_0.1+yO₂) Cathodes material, exhibit remarkable electrochemical performance. However, these materials have a capacitance fading throughout cycling. Subsequent to the study it was found that cathodes that were coated with alumina were found to be more stable by generating SEI that avoids detrimental side reactions between the cathode material and electrolyte solution species. Here we focus on to examine three different coatings on cathode electrodes: alumina and A_xAl_yO_z (A = Li, Na). The electrodes were electrochemically tested and spectrally characterized. Following the coating, improve at efficiency and capacitance values were observed. It was found that sodium aluminate gave the best performance.