Lithium cell

Commercial lithium ion cells are now optimized for either high energy density or high power density. There is a trade-off in cell design between power and energy requirements.

A lithium-ion battery or Li-ion battery is a type ofthat uses the reversibleof Liions into electronically solids to store energy. Compared to other types of rechargeable batteries, they generally have higher

Generally, the negative electrode of a conventional lithium-ion cell is made from . The positive electrode is typically a metalor phosphate. Theis a in an.The negative electrode (which is thewhen the cell is discharging) and the.

Lithium-ion batteries may have multiple levels of structure. Small batteries consist of a single battery cell. Larger batteries connect cellsinto a module and connect modulesand parallel into a pack. Multiple packs may be connected to increase the voltage.

Because lithium-ion batteries can have a variety of positive and negative electrode materials, the energy density and voltage vary accordingly. Theis higher than in(such as ,

One of the earliest examples of research into lithium-ion batteries is a CuF2/Li battery developed byin 1965. The breakthrough that produced the earliest form of the modern Li-ion battery was made by British chemist in 1974, who first used

Lithium-ion batteries are used in a multitude of applications, including , toys, power tools, and electric vehicles.More niche uses include backup power in telecommunications applications. Lithium-ion batteries are also frequently discussed as a potential option for

The lifespan of a lithium-ion battery is typically defined as the number of full charge-discharge cycles to reach a failure threshold in terms of capacity loss or impedance rise. Manufacturers' datasheets typically uses the word "cycle life" to specify lifespan in terms of the number of cycles.