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Aklalouch M.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas Icmab Csic | Olivares-Marin M.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas Icmab Csic | Lee R.-C.,National Taiwan University | Palomino P.,Complutense University of Madrid | And 2 more authors.
ChemSusChem | Year: 2015

By comparing carbon electrodes with varying porosity in Li-O2 cells, we show that the effect of electrolyte stirring at a given current density can result in a change from 2D to 3D growth of discharged deposits. The change of morphology is evident using electron microscopy and by analyzing electrode pore size distribution with respect to discharge capacity. As a consequence, carbon electrodes with different textural properties exhibit different capacity enhancements in stirred-electrolyte cells. We demonstrate that mass transport can directly control the discharge mechanism, similar to the electrolyte composition and current density, which have already been recognized as determining factors. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


PubMed | Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas Icmab Csic and Complutense University of Madrid
Type: Journal Article | Journal: ChemSusChem | Year: 2015

By comparing carbon electrodes with varying porosity in Li-O2 cells, we show that the effect of electrolyte stirring at a given current density can result in a change from 2D to 3D growth of discharged deposits. The change of morphology is evident using electron microscopy and by analyzing electrode pore size distribution with respect to discharge capacity. As a consequence, carbon electrodes with different textural properties exhibit different capacity enhancements in stirred-electrolyte cells. We demonstrate that mass transport can directly control the discharge mechanism, similar to the electrolyte composition and current density, which have already been recognized as determining factors.


PubMed | Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas Icmab Csic and CIBER ISCIII
Type: Journal Article | Journal: Chemical communications (Cambridge, England) | Year: 2015

We examine for the first time the ability of inert carbon free-radicals as soluble redox mediators to catalyze and enhance the oxygen reduction reaction in a (TEGDME)-based electrolyte. We demonstrate that the tris(2,4,6-trichlorophenyl)methyl (TTM) radical is capable of chemically favoring the oxygen reduction reaction improving significantly the Li-O2 battery performance.

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