High-Entropy Lattice Disordering Enhances Ion Migration in LaCl3-Based Solid-State Electrolytes

Abstract

This study focuses on high-entropy LaCl3-based solid-state electrolytes. By introducing multiple elements, a high-entropy disordered structure is constructed. This high-entropy disordered crystal structure reduces the activation energy for lithium-ion diffusion, connects 3D channels for lithium-ion transport, and thereby promotes lithium-ion migration. Specifically, Li(LaIn)0.25(ZrNbTa)0.16Cl4.74 achieves an ionic conductivity of 0.51 mS cm-1 and an activation energy of 0.265 eV at room temperature.