What is a common reason for cell leakage after extensive use?

The common reason for cell leakage after extensive use is that the zinc is oxidized. In many electrochemical cells, particularly those using zinc anodes, the zinc undergoes oxidation through the electrochemical reaction. Over time and with repeated cycles of discharge and recharge, the zinc can break down and corrode, leading to the release of gas bubbles and eventual leakage of the cell electrolyte. This degradation is a critical factor in the longevity and integrity of the cell, as the oxidized zinc can compromise the structural elements of the cell and allow for the escape of the electrolyte, which is essential for maintaining the electrochemical processes within the cell.

Other factors such as electrolyte crystallization or deterioration of internal components may play roles in cell performance but are less directly associated with the onset of leakage compared to the oxidation of the zinc anode. Understanding this behavior is crucial for assessing the lifespan and safety of electrochemical cells in practical applications.