The Origin of Li-O2 Battery Performance Enhancement Using Fluorocarbon Additive
2016 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 163, no 13, A2660-A2664 p.Article in journal (Refereed) Published
Perfluorocarbon compounds (PFC) are known for their high O2 dissolution capability and have been investigated as additives/electrolyte solvents to improve Li-O2 batteries performance. Nevertheless, systematic studies that go beyond the proof of concept that fluorocarbon additives enhance the performance of Li-O2 batteries have not been carried out yet. In this work, we investigate 1-methoxyheptafluoropropane additive (1-PFC), a fluorocarbon with an ether functional group that has been considered as one of the candidates as additives in the Li-O2 battery. Using electrochemical methods and physical characterization of discharge products, we found that the enhancement of the discharge capacity of Li-O2 cells with 1-PFC additive is most likely correlated with instability of the 1-PFC additive against superoxide radicals, rather than the improvement in O2 solubility.
Place, publisher, year, edition, pages
2016. Vol. 163, no 13, A2660-A2664 p.
Inorganic Chemistry Physical Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-307680DOI: 10.1149/2.0671613jesISI: 000389155900024OAI: oai:DiVA.org:uu-307680DiVA: diva2:1047952