Causes due to regular use1. Calendar aging Lithium-ion batteries are constantly degrading—even when they're not in use—simply as a consequence of time and thermodynamics. Overcharging and overdischarging.
The anodes and cathodes that send and receive charged ions wear out over time, resulting in degraded ion flow and inefficient battery life. Time has a way of causing wear and tear on all worldly objects, with lithium-ion and lithium-polymer batteries being no exception.
Lithium-ion batteries unavoidably degrade over time, beginning from the very first charge and continuing thereafter. However, while lithium-ion battery degradation is unavoidable, it is not unalterable. Rather, the rate at which lithium-ion batteries degrade during each cycle can vary significantly depending on the operating conditions.
What happens if you charge a lithium ion battery too fast?
Fast charging Though it may sound advantageous, fast charging contributes to accelerated lithium-ion battery degradation, because if you charge a lithium-ion battery too fast, you risk lithium plating. Lithium plating causes even more severe degradation than SEI does.
Why do lithium-ion batteries get rated based on cycling based degradation?
Since this is a known phenomenon, many lithium-ion battery manufacturers will give their batteries a rating according to their cycling-based degradation. For example, a battery may be rated as being able to complete 1,000 full cycles before it degrades from full capacity to 80% capacity.
What happens if a lithium ion battery is exposed to high temperatures?
Besides triggering potentially dangerous consequences, exposure to high temperatures also causes batteries to degrade more quickly, diminishing their lifetime overall. Exposing lithium-ion batteries to high temperatures has a twofold effect: Firstly, it accelerates the already unavoidable calendar aging.
This bouncing back between 100% and just under 100% charge can elevate the internal LiB temperature, diminishing battery capacity and lifetime. Lithium-ion batteries are, in essence, continuously degrading from the moment they are first used.