Sodium ion conductors are materials that allow sodium ions to move freely through them. They are essential for the development of sodium-ion batteries, which are seen as a potential alternative to lithium-ion batteries. These conductors can improve the efficiency and performance of energy storage systems. The effectiveness of sodium ion conductors depends on their structure and composition. Common materials used include sodium superionic conductors and solid electrolytes. Research in this field aims to enhance conductivity and stability, making sodium-ion technology more viable for large-scale energy applications, such as renewable energy storage and electric vehicles.