“The challenge is to find a safer, more efficient and economical way to store hydrogen so that it can be released on demand,” explained chemist Sean McGrady, the lead researcher on the project. “The way to do this is to turn hydrogen into a compound — a solid — so you can use it when you want, safely, in the amount you want.”
Hydrogen gas is typically stored under pressure in large metal cylinders, approximately four feet high. These cylinders are heavy and expensive to transport. Since they are under pressure, they also pose a safety hazard.
“We’ve reached a milestone with our ability to condense hydrogen into a usable solid,” said Dr. McGrady. “The next step is to produce a safe, compact storage system for the compound that is both lightweight and affordable.”
The full release is worth reading, but the gist of it is here.