Cycle life is a critical parameter in evaluating the longevity of rechargeable batteries and capacitors. It refers to the number of complete charge-discharge cycles a device can undergo before its performance degrades to a specified level, typically around 80% of its original capacity. The cycle life is influenced by factors such as the depth of discharge, charging rate, operating temperature, and the inherent stability of the materials used in the device. Improving cycle life is a key focus in the development of energy storage technologies, as it directly impacts the overall lifespan and cost-effectiveness of devices like electric vehicle batteries and renewable energy storage systems. For example, advancements in electrode materials and electrolyte formulations have significantly extended the cycle life of lithium-ion batteries in recent years. Understanding and optimizing cycle life is essential for designing more durable and sustainable energy storage solutions.