Local electronic regulation of Na₅V₁₂O₃₂ cathode suppressing structural distortion toward enhanced sodium storage.

ABSTRACT: High-voltage layered oxide cathodes have received extensive attention for sodium-ion batteries owing to their potential high energy and power densities, but their stabilization remains a universal challenge. Herein, a stable high-voltage K_xNa_5-xV₁₂O₃₂ cathode is designed by synergistically tuning the irreversible phase and oxygen vacancies through the substitution of Na with K. The functional mechanism regulating the electronic structure of K_xNa_5-xV₁₂O₃₂ is elucidated: K substitution strengthens V 3d-O 2p hybridization and V 3d-orbital electron delocalization in the K_0.147Na_4.853V₁₂O₃₂ structure, enriching charge distribution and reinforcing the V₃O

SUBMITTER: Song X 

PROVIDER: S-EPMC12675598 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature