Kentucky Bourbon Waste Shows Promise for Next-Gen Energy Storage

A research team at the University of Kentucky has developed a method to convert a major waste product from bourbon production into a high-grade material for supercapacitors. The finding points to a potential new market for the state's signature industry while addressing a need in advanced energy storage.

Federal law mandates that bourbon be aged in new, charred oak barrels, creating a steady stream of used casks. While some find secondary use, the charred wood interior is often discarded. Professor Lance De Long's engineering group discovered this 'red layer' of char, a byproduct of the barrel-making process, can be chemically activated to create electrodes. Their tests indicate the material performs on par with commercial activated carbon, a key component in supercapacitors.

Supercapacitors are energy storage devices that excel at delivering rapid, powerful bursts of energy. They are used in applications from regenerative braking in electric vehicles to stabilizing power grids. Most activated carbon for these components is sourced from coconut shells overseas. A domestic supply derived from an existing waste stream could offer supply chain and cost benefits.

The innovation hinges on a practical advantage: the distilling industry has already performed the initial, energy-intensive step of charring the wood. The researchers' activation process builds upon this pre-treated material, which could simplify production. Early electrochemical data shows the electrodes hold over 90% of their capacity after thousands of charge cycles.

Commercial viability hinges on scaling and consistent quality from variable barrel char. Yet, the initial science presents a compelling case. It transforms a disposal question for distillers into a conversation about advanced manufacturing, linking a traditional industry to the future of energy technology.

Source: Webpronews