"Hydrogen fuel cell technology is full of promise, but it's being held back by the problem of storing the dangerous gas safely and efficiently. Some U.S. scientists have been tackling this, and their solution is as ingenious as it is odd: Carbonized chicken feathers.
The University of Delaware team realized that the protein keratin, the main ingredient in chicken feather fibers, had fabulous properties when it's heated. Basically the keratin creates very strong cross-links when it's carbonized, and the feather fibers become extremely porous, which dramatically increases their surface area. As a result, the carbonized feathers can absorb huge amounts of hydrogen into their structure."
— Kit Eaton, Fast Company