The Origin of Li-O2 Battery Performance Enhancement Using Fluorocarbon Additive. Issue 13 (1st January 2016)

• Record Type: Journal Article
• Authors: Wijaya, Olivia; Rinaldi, Ali; Younesi, Reza; Yazami, Rachid
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 13(2016)
• Page Start: A2660
• Page End: A2664
• Publication Date: 2016-01-01
• Subjects: Additive -- Electrode -- Electrolyte -- Lithium Oxygen Battery -- Perfluorocarbon (PFC); Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0671613jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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.