Bio-battery runs on shots of vodka New Scientist

An enzyme-catalysed battery has been created that could one day run cell phones and laptop computers on shots of vodka. The key to the device is a new polymer that protects the fragile enzymes used to break down the ethanol fuel, scientists told the American Chemical Society’s annual meeting in New Orleans on Monday. Enzyme-based batteries have the potential to be cheaper than fuel cells that rely on expensive platinum or ruthenium catalysts. “It sounds great,” says Bob Hockaday, founder of the company Energy Related Devices and designer of a methanol-powered battery. “Enzymes are inexpensive and catalytically very active.”