(110e) Kinetics of MnO2 Using a Rotating Disk Electrode

Electroactive materials are commonly characterized by cyclic voltammetery and chronopotentiometry experiments. The commonly used MnO₂ electrodes are a mixture of MnO₂ particle, graphite to improve the overall conductivity and a binder to hold the electrode together. These electrodes require very slow scan rate in range of uV/s in-order to compensate for the slow mass transfer thorough the porous electrode to study the true kinetics and thermodynamics of the electrode. Using a thin-film of MnO₂ electrode drop casted on a rotating disk electrode the limitation on mass transter effect can be eliminated and cyclic voltammetery study can be carried out at rapid speed. The rotating disk electrode study of various MnO₂ be used advantageously to study the cyclability of the electrode and benchmarking of various MnO₂ materials.