Researchers have developed a magnesium-based paste that stores hydrogen energy 10 times more dense than a conventional lithium-ion battery.
Hydrogen fuel is usually stored in tanks at a pressure of about 700 atmospheres. These reservoirs are quite large and explosive, so they may not be used everywhere.. Now a team from the Institute of Manufacturing Technologies and Advanced Materials. Fraunhofer has come up with an alternative way of storing and transporting this type of energy.
They developed a chemical paste that is made by mixing hydrogen with magnesium at 350 °C and a pressure of about 0.5 MPa, followed by the addition of an ester and a metal salt. The result is a stable, viscous gray mass that can be stored in cartridges..
The paste can withstand temperatures up to 250 °C and can store 10 times more energy than a lithium-ion battery of the same mass.
To release energy, a special mechanism squeezes the substance into a chamber, where it reacts with water, releasing hydrogen, which then enters the fuel cell to generate electricity. At the same time, the effectiveness of the paste is doubled due to H2, which is released in parallel from the water during the reaction..
Pasta power generator prototype
Researchers don’t reveal many the nuances of manufacturing, the fate of the waste material and the required amount of water. However, they said they would open a small paste production facility for pilot programs and industry trials by the end of the year..
We also previously reported on the development of technology for converting natural gas into a non-explosive solid that is easy to store..
text: Ilya Bauer, photo: Fraunhofer IFAM
A paste was invented that can store 10 more energy than a regular battery