Biochar used to produce supercapacitors

"Researchers report that wood-biochar supercapacitors can produce as much power as today’s activated-carbon supercapacitors at a fraction of the cost."

Read more: http://www.theengineer.co.uk/energy-and-environment/news/biochar-used-to-produce-supercapacitors/1017349.article#ixzz2iyzhDkTf