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Reactivity of carbon in lithium-oxygen battery positive electrodes

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21590

Hävecker,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22163

Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Itkis, D. M., Semenenko, D. A., Kataev, E. Y., Belova, A. I., Neudachina, V. S., Sirotina, A. P., et al. (2013). Reactivity of carbon in lithium-oxygen battery positive electrodes. Nano Letters, 13(10), 4697-4701. doi:10.1021/nl4021649.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-5279-E
Abstract
Unfortunately the practical applications of Li-O2 batteries are impeded by poor rechargeability. Here we for the first time show that superoxide radicals generated at the cathode during discharge react with carbon that contain activated double bonds or aromatics to form epoxy groups and carbonates, which limits the rechargeability of Li-O2 cells. Carbon materials with a low amount of functional groups and defects demonstrate better stability thus keeping the carbon will-o’-the-wisp lit for lithium-air batteries.