• Home
  • Search Results
  • Mass-transport Control on the Discharge Mechanism in Li-O2 Batteries Using Carbon Cathodes with Varied Porosity.

Mass-transport Control on the Discharge Mechanism in Li-O2 Batteries Using Carbon Cathodes with Varied Porosity.

ChemSusChem (2015-09-19)
Mohamed Aklalouch, Mara Olivares-Marín, Rung-Chuan Lee, Pablo Palomino, Eduardo Enciso, Dino Tonti
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lithium, granular, 99% trace metals basis
Sigma-Aldrich
Lithium, ribbon, thickness × W 0.38 mm × 23 mm, 99.9% trace metals basis
Sigma-Aldrich
Lithium, ribbon, thickness × W 0.75 mm × 19 mm, 99.9% trace metals basis
Sigma-Aldrich
Lithium, granular, 4-10 mesh particle size, high sodium, 99% (metals basis)
Sigma-Aldrich
Lithium, ribbon, thickness × W 0.75 mm × 45 mm, 99.9% trace metals basis
Lithium, foil, 25x100mm, thickness 0.6mm, as rolled, 99.9%
Sigma-Aldrich
Lithium, rod, diam. 12.7 mm, 99.9% trace metals basis
Sigma-Aldrich
Lithium, wire, diam. 3.2 mm, in mineral oil, ≥98%
Sigma-Aldrich
Lithium, wire (in mineral oil), diam. 3.2 mm, 99.9% trace metals basis
Sigma-Aldrich
Lithium, foil, not light tested, 38x500mm, thickness 0.20mm, as rolled, 99.9%
Sigma-Aldrich
Lithium, ribbon, thickness × W 1.5 mm × 100 mm, 99.9% trace metals basis
Lithium, foil, not light tested, 38x200mm, thickness 0.20mm, as rolled, 99.9%
Sigma-Aldrich
Lithium-7Li, ≥99.8 atom % 7Li, ≥99.8% (CP)