First of all, let's take a look at the material composition of lithium batteries. The performance of lithium-ion batteries mainly depends on the structure and performance of the internal materials used in the battery. The internal materials of these batteries include negative electrode materials, electrolytes, separators, and positive electrode materials. Among them, the choice and quality of positive and negative materials directly determine the performance and price of lithium-ion batteries. Therefore, the research of cheap, high-performance positive and negative materials has always been the focus of the development of the lithium-ion battery industry.

　　Carbon materials are generally used as anode materials, and the current development is relatively mature. The development of cathode materials has become an important factor restricting the further improvement of lithium-ion battery performance and the further reduction of prices. In the current commercial production of lithium-ion batteries, the cost of the cathode material accounts for about 40% of the entire battery cost, and the decrease in the price of the cathode material directly determines the decrease in the price of the lithium-ion battery. This is especially true for lithium-ion power batteries. For example, a small lithium-ion battery used in a mobile phone only needs about 5 grams of positive electrode material, while a lithium-ion power battery used to drive a bus may require up to 500 kilograms of positive electrode material.

　　Although theoretically there are many types of positive electrode materials that can be used as lithium-ion batteries, the main component of common positive electrode materials is LiCoO2. When charging, the potential applied to the battery poles forces the compound of the positive electrode to release lithium ions, and the molecules of the negative electrode are arranged in a layered structure. In the carbon. During discharge, lithium ions are precipitated from the carbon of the sheet structure and recombine with the compound of the positive electrode. The movement of lithium ions generates an electric current. This is how the lithium battery works.