Strategies to increase the stability and energy density of NVPF– A comprehensive review

Although the lithium-ion battery has dominated the sustainable energy field for many years, environmentally friendly and inexpensive sodium (Na) is a great contender to reduce the use of limited lithium resources. Sodium-ion batteries (SIBs) have a big catalog of cathode materials grouped into four main types: the Prussian blue analogs, organic-based materials, layered metal oxides, and polyanions, whereas the latter is characterized by sodium superionic conductors (NASICON) with its chemical formula such as Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) gaining prevalence. Therefore, this review focuses on the most recent studies to promote the long-term stability, capacity, and energy density of NASICON’s high-potential NVPF.