Heterostructure of Ta5+-substituted Na3V2(PO4)3–TaN promoting the activation of V4+/V5+ redox couple for high performance sodium-ion batteries

Win–win strategy: zinc-ion anchoring crosslinked hydrogels and regulating electronic structure to achieve V3+/V4+/V5+ redox reaction of Na3V2(PO4)3 with high thermal stability and zero strain characteristics

“…7–9 It exhibits a high discharge specific capacity of 117.6 mA h g −1 and a high voltage plateau of 3.4 V, making it a promising candidate. 10–12 However, NVP has inherent limitations in terms of ionic and electronic conductivity. Researchers have addressed these drawbacks using various approaches, with the most notable being NVP phase doping and modification with conductive carbon materials.…”