High-Entropy and Na-Rich-Designed High-Energy-Density Na₃V₂(PO₄)₃/C Cathode.

ABSTRACT: The Na₃V₂(PO₄)₃ (NVP) cathode holds the merit of a stable 3D NASICON structure for ultrafast Na⁺ diffusion, yet it is still confronted with poor electronic conductivity (10^-9 S cm^-1) and insufficient energy density (∼370 W h kg^-1). Herein, a series of high-entropy-doped Na_3+xV_1.76-xZn_x(GaCrAlIn)_0.06(PO₄)₃ (x = 0, 0.2, 0.35, and 0.5) cathodes are systematically prepared with an activated V⁵⁺⇌V⁴⁺ high-voltage plateau (4.0 V) and elevated discharge capacity, which is derived from the charge compensation of divalent Zn substituting for trivalent V accompanied by extra Na⁺ input to create a

SUBMITTER: Ding X 

PROVIDER: S-EPMC11697336 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature