3Transition Metal Oxide Cathodes for Sodium‐Ion Batteries
3.1 Introduction
Since that energy density will be the overriding factor for sodium‐ion batteries (SIBs) to be deployed in real practice, the identification of suitable cathode materials is essential to close the performance gap between SIBs and lithium‐ion batteries (LIBs) and speed up the commercialization of SIBs. Over the years, a wide spectrum of cathode materials has been investigated to study their viability for SIBs, which primarily include layered‐ and tunnel‐structured transition metal (TM) oxides, polyanion cathodes, Prussian blue analogues (PBAs), and organic compounds. Typical cathode materials for SIBs are based on intercalation chemistry, where sodium ions provided by ...
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