Supercapacitors are energy storage devices that charge very rapidly and can retain their storage capacity through tens of thousands of charge cycles. Their applications include regenerative braking systems for electric vehicles.They store less energy in the same space as batteries, and they don't take long to recharge - but advances in supercapacitor technology could make them competitive with batteries in a wider range of applications. In a study entitled “Efficient 3D Printed Pseudocapacitive Electrodes with Ultrahigh MnO2 Loading,” a group of researchers at UC Santa Cruz and Lawrence Livermore National Laboratory have achieved unprecedented performance from a supercapacitor electrode.The electrode is made from 3D printable graphene aerogel, which is used to build porous 3D scaffolds loaded with fake capacitive material.
The supercapacitors made of electrodes have good cyclic stability and maintain more than 90% of the initial capacitance after 20,000 charge and discharge cycles. The 3D printed electrodes allow for a large amount of design flexibility, and the graphene-based inks offer ultrahigh surface area, lightweight properties, elasticity, and superior electrical conductivity.