Why the positive electrodes have to be replaced frequently?

Positive electrodes in batteries, such as lithium-ion cells, often need to be replaced frequently due to degradation from repeated charge and discharge cycles. This degradation can result from factors like structural changes in the electrode material, buildup of solid electrolyte interphase (SEI) layers, and loss of active material. Over time, these processes reduce the electrode's capacity and efficiency, leading to diminished battery performance. Additionally, factors like temperature and high charge rates can accelerate this wear, necessitating more frequent replacements.