Proton diffusion process manganese dioxide for use in rechargeable alkaline zinc manganese dioxide batteries and its electrochemical performance

The aim of the present work is the study of the performances of dry cells containing the electrolytic MnO2, natural MnO2, or a mixture of both. The two components have been characterized by chemical analysis. The continuous discharge tests done on the dry cells based on EMD present a discharge time largely greater than that of the pure NMD; however, the cells containing a mixture present intermediate values of the discharge time. The value of the diffusion coefficient estimated by the GITT or impedance spectroscopy shows that the H+ diffuses more quickly in the EMD variety that in the NMD one.