Synthesis Route Effects on Structure and Electrochemical Performance of Layered Oxide Cathode for Na-ion Batteries

Abstract

The synthesis routes plays a critical role in determining the structural and electrochemical stability of layered oxide cathode for soiudm ion batteries. In this work, using Na0.67Fe0.5Mn0.5O2 as a model layered oxide cathode, we investigated two different synthesis methods, specifically, co-precipitation and solid-state reaction, to elucidate their influence on phase formation, morphology and electrochecmial performance. The structural and electrochemical characteriztaion reveal that the co-precipitation-derived materials exhibit superior cycling stability and higher revesible capacity compared to their solid-state counterparts. The improved performance is attributed to the formation of fine and homogeous morphology and high phase purity. These findings highlight the advantages of co-precipitation synthesis in controlling particle morphology and phase purity, toward high-performance, structurally stability sodium-ion battery ctahode.