12V 42Ah Lithium Iron Phosphate Battery Pack With BMS

The secret of lithium-ion battery aging

The range of use of batteries has always been a concern for researchers, because no matter how big the battery is, it doesn't make sense not to recharge it multiple times. We all understand that lithium-ion batteries reduce their capacity when used, but no one understands why. Recently, the United States Energy Agency discovered the cause of battery aging: nanoscale crystals.

Scholars have carefully studied the positive and negative electrode materials of modern batteries, and found that these materials will be directly corroded during use, but the mechanism of corrosion is not clear. The Brookhaven National Laboratory team studied high-quality nickel-oxygen cathodes under a transmission electron microscope and recorded how they changed when they were repeatedly charged and discharged.

The more you use, the less you use

Experiments have shown that when lithium ions pass through the positive and negative electrodes, they get stuck in the ion channels and react with nickel oxides to form tiny crystals. These crystals alter the internal structure of the battery, making it impossible for other ions to react effectively, reducing the usable capacity of the battery. Surprisingly, this weakness is random, not regular.

The reason why a lithium-ion battery is imperfect is that its components are not perfect. No matter how much we pay attention to the structure of the anode and cathode, there will be slight damage to the crystal. Just like boiling water, the uneven surface makes hot water more susceptible to foaming. It can be assumed that nanocrystals appeared when there was a gap in the battery data.