Ionic batteries are a type of energy storage device that uses a solid electrolyte to facilitate the flow of ions between the anode and cathode. This design enables faster charging and discharging, higher energy density, and improved safety compared to traditional lithium-ion batteries. . With electric vehicles (EVs) that get us places, cell phones that connect us to others, and utility-scale electric grid storage that powers our homes, batteries are all around us. Energy Digital has ranked 10 of the top. . A sodium-ion battery works much like a lithium-ion one: It stores and releases energy by shuttling ions between two electrodes.