Which element, found in rechargeable batteries, is used to store and release electrical energy in a reversible manner?

Lithium

Lithium is widely used in rechargeable batteries due to its unique electrochemical properties, which allow for efficient storage and release of energy. The use of lithium in batteries has revolutionized portable technologies, such as smartphones and laptops, by offering greater capacity, longer lifespan, and faster charging compared to traditional batteries. However, the extraction and processing of lithium pose environmental challenges, particularly in terms of impact on water resources and ecosystem degradation. Thus, while lithium batteries have transformed the way we use energy, their production and recycling require responsible management to minimize their ecological footprint.