Supercapacitors Get Smaller Than Ever

As smart devices, wearable sensors, IoT technologies, and implantable electronics shrink in size, so too should the energy storage devices they rely on. Supercapacitors—with high capacity for energy storage but also a capability to handle rapid charge-discharge cycles that would founder a conventional chemical battery—have in recent years shrunk to “micro” size. Now researchers in India report the tiniest micro-supercapacitor yet, using the two-dimensional materials graphene and molybdenum disulfide (MoS2).