In this paper we investigate in details the changes occurring in the lithium-oxygen cell during operation in a tetraglyme-base electrolyte, in terms of electrochemical behavior and of carbon electrode morphology. The study evidences a decrease of the cell polarization and impedance during cycling associated with a morphological change of the carbon electrode, as demonstrated by SEM images. We attribute the change of the electrode morphology to the already known carbon oxidation process, here resulting in an increased porosity favoring the reversible electrochemical process. The results here reported shed light on important aspects to be considered in order to better understand the complex behavior of the lithium-oxygen battery. (C) 2013 Elsevier B.V. All rights reserved.
Investigation of the carbon electrode changes during lithium oxygen cell operation in a tetraglyme-based electrolyte / Elia, GIUSEPPE ANTONIO; Jin Bum, Park; Scrosati, Bruno; Yang Kook, Sun; Hassoun, Jusef. - In: ELECTROCHEMISTRY COMMUNICATIONS. - ISSN 1388-2481. - 34:(2013), pp. 250-253. [10.1016/j.elecom.2013.06.024]
Investigation of the carbon electrode changes during lithium oxygen cell operation in a tetraglyme-based electrolyte
ELIA, GIUSEPPE ANTONIO;SCROSATI, Bruno;HASSOUN, JUSEF
2013
Abstract
In this paper we investigate in details the changes occurring in the lithium-oxygen cell during operation in a tetraglyme-base electrolyte, in terms of electrochemical behavior and of carbon electrode morphology. The study evidences a decrease of the cell polarization and impedance during cycling associated with a morphological change of the carbon electrode, as demonstrated by SEM images. We attribute the change of the electrode morphology to the already known carbon oxidation process, here resulting in an increased porosity favoring the reversible electrochemical process. The results here reported shed light on important aspects to be considered in order to better understand the complex behavior of the lithium-oxygen battery. (C) 2013 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.