Na3MnZr(PO4)3 fast ionic conductor modulates zinc flux to achieve homogeneous Zn plating/stripping

An artificial interphase of Na 3 MnZr(PO 4 ) 3 (NMZP) is engineered on the zinc metal surface as a fast ion conductor to efficiently modulate zinc flux and stabilize the anode. Fabricated via a sol-gel method, NMZP possesses a NASICON-type open 3D framework, high structural stability, robust corrosion resistance, and exceptional ionic conductivity, providing favorable pathways for Zn 2+ diffusion. The NMZP interphase modulates Zn 2+ flux through ionic confinement effects while promoting desolvation of [Zn(H 2 O) 6 ] 2+ species prior to deposition, thereby suppressing parasitic reactions. This dual mechanism ensures uniform zinc nucleation and deposition beneath the protective layer, effectively inhibiting dendritic growth and enhancing cycling stability. Benefiting from robust protective function of the NMZP layer, the NMZP@Zn symmetric cell achieves stable cycling beyond 650 hours at 3.0 mA cm -2 and 1.0 mAh cm -2 with minimal polarization. This study establishes an engineered interphase strategy for realizing long-lived, dendrite-free zinc-ion batteries.