Time Resolved Measurements of pH in Aqueous Magnesium?Air Batteries during Discharge and Its Impact for Future Applications

In aqueous magnesium air batteries, the influence of electrochemical behavior on pH electrolyte has not been investigated yet, which a critical effect cell performance. We have monitored evolution at various discharge current densities in situ Mg-air primary cells, produce sparingly soluble hydroxide (Mg(OH)2). These experiments show temporal discharge, depending density. The first increases rapidly to maximum 11 and then drops down slowly equilibrium 10.7. At peak oversaturation Mg(OH)2 is paramount, leading precipitation balances concentration electrolyte. This process coats both cathode anode leads decrease efficiency voltage. results that design batteries important for their lifetime performance increased several folds when changed simple flow cell.