Advances in Vanadium-Redoxed Polyanions for High-Voltage Sodium-Ion Batteries

Large-scale energy storage using sodium ion batteries (SIBs) as a hub for the conversion of renewable has become topic great importance. However, application SIBs is hindered by low density arising from inferior capacity and operation voltage. In this regard, vanadium-based phosphate polyanions with multiple valence changes (III–V), high redox potential, abundant resources, spacious frame structure, remarkable thermal stability are promising avenues to address dilemma. review, following principle electronic structure function relationship, we summarize recent progress in phosphates, pyrophosphates, fluorophosphates, mixed vanadium-centered polyanionic materials SIBs. This review may provide comprehensive understanding guidelines further construct performance, low-cost sodium-ion batteries.