Four essential components of lithium batteries

Attention! These four components of lithium batteries are indispensable! Lithium batteries are composed of four important parts: cathode, anode, electrolyte and protective plate. Every component of a lithium battery is essential because it cannot work without it. Lithium batteries have four components. The cathode determines the capacity and voltage of the lithium battery. Lithium batteries generate electricity through the chemical reaction of lithium. This is why lithium is inserted into the battery, and the lithium space is called the cathode. However, since lithium is an unstable elementary form, lithium and oxygen are combined, and lithium oxide is used for the cathode. Like lithium oxide, the material involved in the electrode reaction of a real battery is called the active material. In other words, lithium oxide is used as an active material for the positive electrode of a lithium battery. If you look closely at the cathode, you will see a thin aluminum foil frame used to fix the cathode coating, which is a compound composed of active materials, conductive additives and binders. Active materials contain lithium ions, and conductive additives are added to increase conductivity. The adhesive acts as a binder to help the active material and conductive additives to be well fixed on the aluminum substrate. The cathode plays an important role in determining the characteristics of the battery, because the capacity and voltage of the battery are determined by the type of active material used in the cathode. The higher the lithium content, the greater the capacity; the greater the potential difference between the cathode and anode, the higher the voltage. Depending on the type, the potential difference of the anode is small, but the potential difference of the cathode is usually relatively high. Therefore, the cathode plays an important role in determining the battery voltage. The anode transports electrons through the wires the same as the cathode, and the anode substrate is also coated with active material. The active material of the anode passes through an external circuit as an electric current, allowing the reversible absorption/emission of lithium ions to be released from the cathode. When the battery is charged, lithium ions are stored in the anode instead of the cathode. At this time, when the wire is connected to the cathode and the anode (discharged state), lithium ions naturally flow back to the cathode through the electrolyte, and electrons (e-) separated from the lithium ions appear current along the wire. It is used in conjunction with structured anode graphite and anode substrate coated with active materials, conductive additives and adhesives. Due to the advantages of graphite's structural stability and lower electrochemical reaction activity, this material is considered suitable for use in anodes with large and expensive lithium ion storage. The electrolyte only allows ions to move. When explaining the cathode and anode, it is mentioned that lithium ions pass through the electrolyte and electrons pass through the wire. This is the key to battery power. If ions flow through the electrolyte, we will not only be unable to use electricity, but will also endanger safety. Electrolyte is an important component. It is used as a medium that can only move lithium ions between the cathode and anode. Regarding the electrolyte, materials with high ionic conductivity are used, making it easy for lithium ions to move back and forth. The electrolyte is composed of salt, solvent and additives. Dissolved salt is the channel through which lithium ions move. Solvent is an organic liquid used to dissolve the salt. A small amount of additives are added for specific purposes. The electrolyte that appears in this way only allows ions to move to the electrode, not electrons. In addition, the speed at which lithium ions move depends on the type of electrolyte. Therefore, only electrolytes that meet stringent conditions can be used. Protective plate, absolute barrier between cathode and anode Although the cathode and anode determine the basic performance of the battery, the electrolyte and the protective plate determine the safety of the battery. The separator acts as a physical barrier to separate the cathode and anode. It prevents the direct flow of electrons and only allows ions to pass through the internal pores. Therefore, it must meet all physical and electrochemical conditions. So far, we have studied four important components that determine the performance of lithium batteries. The industry has been stepping up research and development of new materials to improve battery performance, while continuing to work hard to improve the performance of existing materials and core technologies. Through the innovation of high-capacity/high-efficiency lithium batteries, it is believed that it will enrich the lives of people all over the world. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one: 18650 lithium battery Features and uses