Electrochemical impedance spectroscopy study in-situ state of health of the alkaline Zn-MnO₂ batteries under changing of thermal modes.

Анотація

Alkaline Zn-MnO2 elements are extensively used type of batteries today. Studies of the zinc oxidation mechanisms, the mechanisms of MnO2 reduction and influence of various chemical additives in the electrolytes have been used for significantly increasing of the lifetime of such systems in conditions of power loads. However, the available data does not allow to evaluate the degree of the changes in the composition and structure of the electrodes and electrolyte in the electrochemical current source as they are derived from compromising the integrity of the working element. Electrochemical impedance spectroscopy (EIS) is a powerful technique for electrode kinetic analysis. This is because it can give the individual impedance for each reaction process, including that of the electrolyte, the passivation layer, charge-transfer, and metal diffusion, provided that the individual time constants are separable. In current study was investigated the effect of temperature factor on the electrochemical characteristics of the charged commercial alkaline zinc-manganese batteries (Duracell AAA) in size (MN 2400).