Korean scientists at the Korea Advanced Institute of Science and Technology (KAIST) have developed a Hydrogen fuel cell powered Unmanned Aerial Vehicle (UAV). The UAV weighs less than 4.5lbs (2kg) and is able to carry out a flight of over 10 hours with only one charge of its Hydrogen fuel cell.According to the sceintists, the sodium borohydride used as the liquid fuel can produce more Hydrogen than Hydrogen gas and is also more convenient for commercialization. Furthermore, the Hydrogen fuel cell produces about 10 times more electricity that existing batteries.
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