title: Mass-transport Control on the Discharge Mechanism in Li-O2 Batteries Using Carbon Cathodes with Varied Porosity.
abstract: 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.
authors.affiliation: Institut de Ciència de Materials de Barcelona-Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Aklalouch
authors.affiliation: Institut de Ciència de Materials de Barcelona-Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Mara
authors.initials: M
authors.lastname: Olivares-Marín
authors.affiliation: Institut de Ciència de Materials de Barcelona-Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain.|Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
authors.forename: Rung-Chuan
authors.initials: RC
authors.lastname: Lee
authors.affiliation: Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), Avenida Complutense s/n, ES, 28040, Madrid, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Palomino
authors.affiliation: Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), Avenida Complutense s/n, ES, 28040, Madrid, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Enciso
authors.affiliation: Institut de Ciència de Materials de Barcelona-Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain. dino.t@csic.es.
authors.forename: Dino
authors.initials: D
authors.lastname: Tonti
mesh_terms: D002244:Carbon / Q000737:chemistry*; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission
chemical_list: D002244:Carbon; D008094:Lithium
keywords: ionic liquids; lithium-air batteries; mesoporous carbon; modeling; oxygen reduction reaction