The gas diffusioin electrode is mounted between two gas reservoirs. The upper reservoir contains an inert gas, the electrolyte cell and the microelectrode. The lower comaprtment contains a gass mixture with a well dajustable oxygen partial pressure. Oxygen diffuses through the gas diffusion electrode into the electrolyte solution and can be converted there. The microelectrode is used to detect with high time resolution either oxygen or the reaction products formed upon oxygen reduction.
Literature:
P. Schwager, D. Fenske, G. Wittstock
Scanning electrochemical microscopy of oxygen permeation through air-electrodes in lithium–air batteries
J. Electroanal. Chem., 2015, 740, 82-87, Abstract & Link
H. Bülter, P. Schwager, D. Fenske, G. Wittstock
Observation of Dynamic Interfacial Layers in Li-Ion and Li-O2 Batteries by Scanning Electrochemical Microscopy
Electrochim. Acta 2016, 199, 366-379. Abstract & Link
P. Schwager, S. Dongmo, D. Fenske, G. Wittstock
Reactive oxygen species formed in organic lithium-oxygen batteries
Phys. Chem. Chem. Phys. 2016, 18, 10774-10780, Abstrac & Link