Cathode Materials for Sodium Ion Batteries

Recently, many research focused to unravel the detailed interaction mechanism of sodium ion with the cathode materials to have an in-depth understanding of the atomic level sodium transports and interactions. This rigorous understanding could offer answer to the existing problems by giving valuable insight on the structural modification of the electrode materials to provide better electrochemical performance. Thus, in this chapter, recent progress in the cathode materials are organized to get a wide and better perspective in the area of sodium ion batteries (SIBs). Furthermore, some inherent properties of many well studied cathodes (layered transition metal oxides, phosphates, pyrophosphate, NASICON-based compounds, fluorides, and organic compounds) for SIBs are also analysed in this chapter. Through the in-depth understanding of all the above-mentioned topics, the causes behind the drawbacks of the existing cathode systems and how these issues can be addressed by designing new cathodes with improved electrochemical performance, are revealed and explained. In the summary, challenges and future prospects are also incorporated to provide insight and guide the readers to design and develop new cathode systems with enhanced electrochemical properties for SIBs.