biostudies-literatureMa HUsers with Excellence Program of Hefei Science Center CASNational Key Research and Development ProgramNational Natural Science Foundation of ChinaNational Key Research and Development Program of Chinae2203552https://www.ebi.ac.uk/biostudies/studies/S-EPMC9896047biostudies-literatureUnknown10(4)As a promising cathode material of sodium-ion batteries, Na₃ V₂ (PO₄ )₃ (NVP) has attracted extensive attention in recent years due to its high stability and fast Na⁺ ion diffusion. However, the reversible capacity based on the two-electron reaction mechanism is not satisfactory limited by the inactive M1 lattice sites during the insertion/extraction process. Herein, self-supporting 3D porous NVP materials with different crystallinity are fabricated on carbon foam substrates by a facile electrostatic spray deposition method. The V⁵⁺ /V⁴⁺ redox couple is effectively activated and the three-electron reactions are realized in NVP for sodium storage by a proper crystallinity tuning. In a disordered NVP sample, an ultrAdvanced science (Weinheim, Baden-Wurttemberg, Germany)Crystallinity Tuning of Na₃ V₂ (PO₄ )₃ : Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior.PMC98960472017YFA0402800U17321602021HSC-UE009Li WWang PSheng ZZhao BMa HZhu XBai JSun YMao YfalseCrystallinity Tuning of Na₃ V₂ (PO₄ )₃ : Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior.As a promising cathode material of sodium-ion batteries, Na₃ V₂ (PO₄ )₃ (NVP) has attracted extensive attention in recent years due to its high stability and fast Na⁺ ion diffusion. However, the reversible capacity based on the two-electron reaction mechanism is not satisfactory limited by the inactive M1 lattice sites during the insertion/extraction process. Herein, self-supporting 3D porous NVP materials with different crystallinity are fabricated on carbon foam substrates by a facile electrostatic spray deposition method. The V⁵⁺ /V⁴⁺ redox couple is effectively activated and the three-electron reactions are realized in NVP for sodium storage by a proper crystallinity tuning. In a disordered NVP sample, an ultr2023-01-01T00:00:00Z2023 Feb2025-04-19T13:31:30.092Z2025-04-19T13:31:30.092ZS-EPMC98960473650436010.1002/advs.202203552