The glass phase in the grain boundary of Na₃Zr₂Si₂PO₁₂, created by gallium modulation.

ABSTRACT: Na₃Zr₂Si₂PO₁₂ has been proven to be a promising electrolyte for solid-state sodium batteries. However, its poor conductivity prevents application, caused by the large ionic resistance created by the grain boundary. Herein, we propose an additional glass phase (Na-Ga-Si-P-O phase) to connect the grain boundary via Ga ion introduction, resulting in enhanced sodium-ion conduction and electrochemical performance. The optimized Na₃Zr₂Si₂PO₁₂-0.15Ga electrolyte exhibits Na⁺ conductivity of 1.65 mS cm^-1 at room temperature and a low activation energy of 0.16 eV, with 20% newly formed glass phase enclosing the grain boundary. Temperature-dependent NMR line shapes and spin-lattice re

SUBMITTER: Lou C 

PROVIDER: S-EPMC10935661 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature