State of Charge In lithium-ion batteries, battery degradation due to SOC is the result of keeping the battery at a certain charge level for lengthy periods of time, either high or low. This causes the general health of battery to gradually deteriorate.
The battery generates power when lithium ions move from the anode to the cathode, which creates a flow of electric current. When the battery is recharged, the process happens in reverse, with lithium ions moving from the cathode back to the anode. This process is destructive. So,
Calendar Aging: Even when not in use, lithium-ion batteries undergo a process called calendar aging. The passage of time, along with temperature and storage conditions, can cause chemical reactions within the battery that degrade its performance.
Consumption of the cell’s lithium ions through SEI growth is one contributing factor to the degradation mode known as loss of lithium inventory (LLI). Because these reactions occur even when the cell is not in use, known as calendar aging, lithium-ion battery degradation is unavoidable.
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.
Researchers have discovered the fundamental mechanism behind battery degradation, which could revolutionize the design of lithium-ion batteries, enhancing the driving range and lifespan of electric vehicles (EVs) and advancing clean energy storage solutions.