How chemists turned bourbon waste into supercapacitors

Chemists at the University of Kentucky developed a method to convert bourbon distillery waste (stillage) into carbon electrodes for supercapacitors, achieving energy storage capacity comparable to commercial devices. For every barrel of bourbon produced, six to ten barrels of stillage are generated, which is costly to dry and difficult to transport. The team used hydrothermal carbonization to transform this watery waste into useful carbon materials.