Corncobs as a Source of Supercapacitors?

Dean Sigler Electric Powerplants, Sustainable Aviation 0 Comments

Researchers at the Illinois Sustainable Technology Center at the University of Illinois report, “that wood-biochar supercapacitors can produce as much power as today’s activated-carbon supercapacitors at a fraction of the cost – and with environmentally friendly byproducts.” Junhua Jiang, senior research engineer at the Center, has been reducing wood and cellulose products such as corncobs to biochar by heating the fibers in a reduced oxygen environment.  This pyrolysis process creates a  porous, black substance that can be used as electrodes in supercapacitors.  While other researchers use carbon black or more advanced forms of carbon such as nanotubes, this more humble approach yields equal or better performance at a fraction of the cost of the more labor-intensive methods.  Many of the alternatives obtain …