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Green Hydrogen H2 News

Fraunhofer IFAM develops hydrogen POWERPASTE for e-scooters

Anela DoksoBy Anela Dokso04/02/20213 Mins Read
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Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden has developed POWERPASTE which provides a safe way of storing hydrogen in a chemical form that is easy to transport and replenish without the need for an expensive network of filling stations.

Researchers have come up with a hydrogen-based fuel that is ideal for small vehicles, POWERPASTE, which is based on solid magnesium hydride.

“POWERPASTE stores hydrogen in a chemical form at room temperature and atmospheric pressure to be then released on demand and given that POWERPASTE only begins to decompose at temperatures of around 250 °C, it remains safe even when an e-scooter stands in the baking sun for hours. Moreover, refueling is extremely simple. Instead of heading to the filling station, riders merely have to replace an empty cartridge with a new one and then refill a tank with mains water. This can be done either at home or underway.”

Dr. Marcus Vogt, research associate at Fraunhofer IFAM.

The starting material of POWERPASTE is magnesium, one of the most abundant elements and, therefore, an easily available raw material. Magnesium powder is combined with hydrogen to form magnesium hydride in a process conducted at 350 °C and five to six times atmospheric pressure. An ester and a metal salt are then added in order to form the finished product. Onboard the vehicle, the POWERPASTE is released from a cartridge by means of a plunger.

When water is added from an onboard tank, the ensuing reaction generates hydrogen gas in a quantity dynamically adjusted to the actual requirements of the fuel cell. In fact, only half of the hydrogen originates from the POWERPASTE; the rest comes from the added water.

With its huge energy storage density, POWERPASTE is also an interesting option for cars, delivery vehicles and range extenders in battery-powered electric vehicles. Similarly, it could also significantly extend the flight time of large drones, which would thereby be able to fly for several hours rather than a mere 20 minutes. T

his would be especially useful for survey work, such as the inspection of forestry or power lines. In another kind of application, campers might also use POWERPASTE in a fuel cell to generate electricity to power a coffeemaker or toaster.

In addition to providing a high operating range, POWERPASTE has another point in its favor. Unlike gaseous hydrogen, it does not require a costly infrastructure. This makes it ideal for areas lacking such an infrastructure. In places where there are no hydrogen stations, regular filling stations could therefore sell POWERPASTE in cartridges or canisters instead.

The paste is fluid and pumpable. It can therefore be supplied by a standard filling line, using relatively inexpensive equipment. Initially, filling stations could supply smaller quantities of POWERPASTE – from a metal drum, for example – and then expand in line with demand. This would require capital expenditure of several tens of thousands of euros.

Fraunhofer IFAM is currently building a production plant for POWERPASTE at the Fraunhofer Project Center for Energy Storage and Systems ZESS.

Scheduled to go into operation in 2021, this new facility will be able to produce up to four tons of POWERPASTE a year.

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