Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. It’s generally not a great idea to mix bourbon with high-voltage electricity. That said, chemists at the University of Kentucky discovered a potentially powerful use for one of whiskey’s most annoying—and plentiful—byproducts. According to the team , the liquor’s waste grains can be recycled into supercapacitors that rival commercially available options. Behind every bottle of bourbon are vats of waste materials. Most of that unwanted trash is stillage—a goopy, mushy mixture of grains and corn. And in Kentucky—where 95 percent of the world’s bourbon is produced— there is a lot of stillage. “From the final volume of bourbon produced, you get 6 to 10 times that amount of stillage as waste,” University of Kentucky chemist Josiel Barrios Cossio explained in a statement. “So it’s a big deal.”  Although stillage is often sold to farmers for livestock feed and soil enrichment, it’s a tricky material to handle. Transporting it is difficult given how watery it is, but it’s also exorbitantly …