A Li-Air Battery with Ultralong Cycle Life in Ambient Air.
basic_science · Level V
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- Record sourced from PubMed, PMID 29194803.
- Also identified by DOI 10.1002/adma.201704378.
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Abstract
The Li-air battery represents a promising power candidate for future electronics due to its extremely high energy density. However, the use of Li-air batteries is largely limited by their poor cyclability in ambient air. Herein, Li-air batteries with ultralong 610 cycles in ambient air are created by combination of low-density polyethylene film that prevents water erosion and gel electrolyte that contains a redox mediator of LiI. The low-density polyethylene film can restrain the side reactions of the discharge product of Li<sub>2</sub> O<sub>2</sub> to Li<sub>2</sub> CO<sub>3</sub> in ambient air, while the LiI can facilitate the electrochemical decomposition of Li<sub>2</sub> O<sub>2</sub> during charging, which improves the reversibility of the Li-air battery. All the components of the Li-air battery are flexible, which is particularly desirable for portable and wearable electronic devices.