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Sodium-air fuel cells may soon be electrifying airliners
Scientists have developed a fuel cell system which they say could ultimately have enough energy capacity to power regional electric aircraft. They state that the technology is capable of carrying over three times as much energy per unit of weight as a lithium-ion battery.
Created by Prof. Yet-Ming Chiang and colleagues at MIT, the current prototype device consists of two chambers linked by a solid ceramic electrolyte material. The process does create sodium oxide as a byproduct, which the researchers state would soak up excess carbon dioxide from the atmosphere when expelled from aircraft in the exhaust. It utilizes widely available inexpensive sodium chloride salt, and melts into metal form at a temperature of 98 ºC (208 ºF), just below the boiling point of water.
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