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PNNL team uncovers reaction mechanisms of Li-air batteries; how batteries blow bubbles

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Lithium-air batteries are looked to by many as a very high-energy density next-generation energy storage solution for electric vehicles. One reaction that hasn’t been fully explained is how oxygen blows bubbles inside a lithium-air battery when it discharges. The paper is published in the journal Nature Nanotechnology.

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Liox Power reports first operation of a Li-air battery with a straight-chain alkyl amide electrolyte solvent; new direction for Li-air research

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Researchers at startup Liox Power, a California-based company developing rechargeable Li-air batteries, have demonstrated for the first time the operation of a lithium-air battery with a Li anode in a straight-chain alkyl amide electrolyte solvent (N,N-dimethylacetamide (DMA)/lithium nitrate (LiNO 3 )).

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MIT, Toyota team clarifies role of iodide in Li-air batteries

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Lithium-air (or lithium-oxygen) batteries potentially could offer three times the gravimetric energy of current Li-ion batteries (3500 Wh/kg at the cell level); as such, they are looked to a potential solution for long-range EVs. Li 2 O 2 precipitate passivates the electrode surface hindering further electron transfer.

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EV Everywhere Blueprint outlines DOE technical and development goals for EVs for 2022

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In the near-term (2012-2017), DOE sees an opportunity to more than double the battery pack energy density from 100 Wh/kg to 250 Wh/kg through the use of new high-capacity cathode materials, higher voltage electrolytes, and the use of high capacity silicon or tin- based intermetallic alloys to replace graphite anodes. —Blueprint.

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Systematic review of EV battery pack costs suggests economies of scale may push cost toward US$200/kWh without further cell chemistry improvements

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Their study, said Björn Nykvist and Måns Nilsson, has significant implications for the assumptions used when modeling future energy and transport systems and permits an optimistic outlook for BEVs contributing to low-carbon transport. Cost of Li-ion battery packs in BEVs.

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