AsianScientist (Apr. 26, 2017) – In a study published in Chem, researchers from China have developed a way to capture atmospheric nitrogen and store energy in a battery at the same time.
As the most abundant gas in Earth’s atmosphere, nitrogen is an attractive option as a source of renewable energy. But nitrogen gas—which consists of two nitrogen atoms held together by a strong, triple covalent bond—doesn’t break apart under normal conditions, presenting a challenge to scientists who want to transfer the chemical energy of the bond into electricity.
The “proof-of-concept” design works by reversing the chemical reaction that powers existing lithium-nitrogen batteries. Instead of generating energy from the breakdown of lithium nitride (Li3N) into lithium and nitrogen gas, the researchers’ battery prototype runs on atmospheric nitrogen in ambient conditions and reacts with lithium to form lithium nitride. Its energy output is brief but comparable to that of other lithium-metal batteries.
“This promising research on a nitrogen fixation battery system not only provides fundamental and technological progress in the energy storage system but also creates an advanced N2/Li3N (nitrogen gas/lithium nitride) cycle for a reversible nitrogen fixation process,” said senior author Dr. Zhang Xin-Bo, of the Changchun Institute of Applied Chemistry, part of the Chinese Academy of Sciences.
“The work is still at the initial stage. More intensive efforts should be devoted to developing the battery systems.”
The article can be found at: Ma et al. (2017) Reversible Nitrogen Fixation Based on a Rechargeable Lithium-Nitrogen Battery for Energy Storage.
Source: Cell Press.
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