Apatite-structured phosphate compounds for eco-friendly solid-state energy storage: Role of ion substitution

Title : Apatite-structured phosphate compounds for eco-friendly solid-state energy storage: Role of ion substitution

Abstract:

Apatite-type phosphates exhibit structural flexibility that enables ion substitution, making them attractive candidates for solid-state battery electrolytes. In this work, sodium- and lithium-substituted apatite materials were synthesized and characterized to establish structure–property relationships. Phase analysis was performed by X-ray diffraction, vibrational modes by FTIR, and morphology by electron microscopy, while N? sorption and thermal analyses provided information on surface area and stability. Electrochemical impedance spectroscopy revealed the influence of ion substitution on bulk and grain boundary conductivity. The results show that controlled substitution modifies lattice parameters and defect chemistry, thereby enhancing ionic transport and offering potential for sustainable solid-state energy storage.

Keywords: Apatite phosphates, Ion substitution, Solid-state electrolytes, Ionic conductivity, Structure–property relationships

Biography:

Yousra Kachbou is a PhD candidate in Science and Engineering at the Euro-Mediterranean University of Fes (UEMF), Morocco. Her research focuses on the development of phosphate-based materials for solid-state batteries, with a particular interest in apatite-type compounds and ion-doping strategies for enhanced electrochemical performance. She has experience in materials synthesis, electrochemical characterization, and advanced structural analysis.