An ionic conductor is a material that allows the movement of ions, which are charged particles, through it. This property is essential in various applications, such as batteries and fuel cells, where the flow of ions is crucial for generating electricity. Ionic conductors can be solid, liquid, or gel-like substances, and they often contain electrolytes that facilitate ion movement. In many cases, ionic conductors are used in conjunction with other materials, like electrolytes and electrodes, to create efficient energy storage and conversion systems. Common examples include sodium-ion batteries and solid oxide fuel cells, which rely on ionic conduction to function effectively and provide energy.