We’re so used to having our everyday devices powered by lithium-ion batteries that sometimes it’s hard to imagine using anything else. But there are plenty of teams working on alternatives like lithium-air, sodium-ion, lithium-metal and aluminum-ion designs that may help solve some of the drawbacks of lithium-ion batteries. The latest, an aqueous hybrid capacitor, is stable, safe and boasts high energy and power densities, recharging in as little as 20 seconds.
The new creation, out of the Korean Advanced Institute of Science and Technology (KAIST), is made with a liquid electrolyte sandwiched between a specially-designed anode and cathode. The anode is made with polymer chain materials based on graphene, which gives it a high surface area, allowing it to store more energy. The cathode material was made up of nickel oxide nanoparticles embedded on graphene.