The polarization of batteries involves chemical reactions within the battery. Batteries are a device that converts chemical energy to electrical energy and contains positive and negative poles, which are connected by electrolyte. The following are the principles for the polarization of batteries:
1. Positive reaction: the positive polarity of the battery is usually an oxidizer (a positive polar material in lithium ion batteries), which accepts the electron and participates in the oxidation reduction reaction. Positive reactions can lead to the oxidation of positive substances。
2. Negative polar reaction: the negative polarity of the battery is usually a reduction agent (negative polar material in lithium ion batteries), which releases the electron and participates in the oxidation reduction reaction. Negative polar reaction leads to reduction of negative polar matter。
Electrolyte: the electrolyte in the battery is a conductive solution or solid that allows an ion flow between the positive and negative poles. The electrolyte acts as an ion transfer medium in the battery。
4. Polarization: the reaction between the positive and negative poles of the battery during its operation will result in the progressive accumulation of charge and the formation of a level difference between the two poles. This level differential drives free electronics to flow through external circuits, generating currents. During this process, the chemical reaction within the battery leads to the gradual formation of electrochemical products on the surface of the electrode, which is the polarization of the battery。
Recharge cycle: batteries experience repeated chemical reactions during recharge and discharge, leading to polarization and depolarization cycles. In rechargeable batteries such as lithium ion batteries, the cycle is reversible and batteries can be recharged to their initial state。
In general, the polarization principle of batteries relates to the oxidation reaction between positive and negative poles, the conductive function of electrolyte, and the polarization caused by intra-cell chemical reactions. These principles work together to enable batteries to convert chemical energy to electrical energy and generate currents inside and outside the batteries。
