What are the reasons for the capacity degradation of lithium batteries?

[StAliyah]

Lithium battery capacity degrades because lithium ions react with the electrolyte during movement, leading to some loss of lithium ions. Therefore, the performance of lithium batteries decreases as the number of charge-discharge cycles increases, which is quite normal. Automotive lithium batteries are the power batteries used in hybrid and electric vehicles, offering advantages such as high energy density, large capacity, and no memory effect. To address the issue of lithium battery degradation, it is necessary to develop new electrolytes that can prevent reactions between lithium ions and the electrolyte. There are generally two types of lithium batteries used in pure electric vehicles: lithium iron phosphate batteries and ternary lithium batteries. The cathode of ternary lithium batteries is made from ternary materials.