The lithium battery starts to wear out from the moment it leaves the factory. This is due to the chemical properties of the lithium battery, that is, the internal active material will continue to reduce its activity over time, and the part that gradually becomes inactive will lose its storage. The role of electricity. The reason for the decay of lithium batteries is that lithium ions will react with the electrolyte during the moving process, so that the lithium ions must be lost. Of course, the performance of lithium batteries will decrease with the number of charging and discharging times, which is normal.
Self-discharge refers to the natural loss of battery capacity when it is not in use. One is reversible capacity loss, which means that the lost capacity can be recovered during charging; the irreversible capacity loss is the opposite. Side reactions occur in the electrolyte, and lithium ions are intercalated and deintercalated. The intercalation and deintercalation of lithium ions in the positive and negative electrodes are only related to the lithium ions in the electrolyte. Therefore, the capacity of the positive and negative electrodes is unbalanced, and this part of the capacity loss cannot be recovered during charging. Lithium ions move in different directions during charging and discharging. Lithium ions release electrons to generate current when moving, but lithium ions will react with the electrolyte during the movement, so that lithium ions will have a certain loss. As the number of charge and discharge increases, the number of lithium ions will become less and less, so the performance of the battery will decrease. If the decay problem of lithium batteries is to be solved, new electrolytes need to be developed to avoid the reaction between lithium ions and electrolytes.
If a lithium battery is not used, the battery itself will consume power itself, and this process will also cause aging and oxidation to increase internal resistance. In addition, the battery itself is relatively sensitive to the external environment. Temperature, humidity, changes in its own power, and degree of oxidation will cause changes in the internal lithium ions. As long as it is not in a completely static state, the loss is certain.
