Will fast charging affect 1.5v Dry Batterylife?

　　Most people will feel restless and anxious when the 1.5v Dry Batteryicon in the upper right corner of their mobile phone turns red when the 1.5v Dry Batterypower drops below 10%. The practicality of fast charging also makes more and more people willing to choose mobile phones with fast charging function.

　　Currently, the mainstream fast charging technologies used in mobile phone applications include Qualcomm QuickCharge2.0 (the latest is QuickCharge3.0), MediaTek PumpExpress and OPPOVOOC flash charging. Qualcomm and MediaTek both use high-voltage charging, while VOOC flash charging uses high-current charging.

　　The latest Meizu PRO6 is also equipped with fast charging technology. Its poster has this sentence: "Why do they never talk about 1.5v Dry Batterylife when they talk about fast charging?

　　Will fast charging affect 1.5v Dry Batterylife?

　　Quickly learn about lithium-ion batteries

　　First of all, we need to understand the charging and discharging principles of lithium-ion batteries. The 1.5v Dry Batteryhas two poles: the positive electrode is lithium compound, and the negative electrode is graphite.

　　Charging and discharging are all conversions of electrical energy and chemical energy. During the movement of lithium ions in the positive and negative electrodes, they are also changing into different compounds.

　　We can think of lithium ions as cars equipped with electric charges: when charging, due to the electric field, all the cars drive to the negative electrode to store a certain amount of energy (lithium ions are embedded in the micropores of the graphite carbon layer of the negative electrode); when discharging, These charged lithium ion cars run to the positive electrode due to chemical reactions (the deintercalation of lithium ions makes the positive electrode in a lithium-rich state). In this process, a current supply is formed.

　　Ideally, as long as the chemical structure of the positive and negative electrode materials basically does not change, the reversibility of 1.5v Dry Batterycharge and discharge is very good, and the lithium-ion 1.5v Dry Batterycan ensure long-term circulation.

　　Fast charging mainly ensures that lithium ions are quickly embedded from the positive electrode and quickly embedded in the negative electrode, without causing the deposition of lithium ions.

　　However, when the current increases, a semipermeable membrane (SEI membrane) on the surface of the electrode negative electrode (graphite) will rupture to a certain extent, causing the electrode material and the electrolyte to react with each other. In addition, the increase in temperature will also cause side effects inside the battery. The reaction destroys the chemicals on the battery, resulting in reduced reversibility (that is, the lithium-ion car cannot be driven back and forth) and the 1.5v Dry Batterycapacity will continue to decrease.

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