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Introduction to 23A battery cathode materials, lithium battery cathode material production process
Introduction to 23A battery cathode materials, lithium battery cathode material production process. The cathode material has always been the core of lithium-ion batteries, and its selection directly determines the performance of the battery. At present, the most commonly used 23A battery cathode material has a stable structure, high specific capacity, and outstanding overall performance. However, it has poor safety and very high cost.
Introduction to 23A battery cathode materials
The cathode material of lithium-ion batteries is a transition metal oxide containing lithium, which belongs to a class of functional ceramic materials. For materials used in lithium-ion batteries, lithium ions must be able to diffuse freely in the crystal, and the crystal structure determines the movement dimensions of lithium ions. Currently marketed 23A battery cathode materials include lithium cobalt oxide, lithium manganate, lithium iron phosphate and ternary materials.
In order for 23A battery cathode materials to exert the best performance in the full battery, it is necessary to further optimize the crystal structure, particle structure and morphology, particle surface chemistry, material packing density and compaction density of the material on the premise of optimizing the material composition. physical and chemical properties, and it is also necessary to strictly prevent the introduction of trace metal impurities during the process.
Lithium battery cathode materials have a broad market and the prospects are very optimistic. However, there are still certain technical bottlenecks in the lithium battery cathode material, especially its advantages of high capacity and strong safety performance that have not yet been fully utilized. In the field of lithium battery cathode materials, any minor technological innovation is likely to set off a new round of market expansion. Chinese companies should strengthen research and development of key cathode material technologies, gain an international leading position, enhance core competitiveness, and compete in international competitions. Gained the advantage.
Principles for selecting cathode materials for lithium-ion batteries
●The relative molecular mass is small and can accommodate a large amount of lithium to provide high battery capacity;
●The cathode material needs to have a large pore tunnel structure to facilitate the insertion and extraction of lithium ions;
●The cathode material has minimal polarity to ensure good reversibility and increase the number of cycles;
●Has good thermal stability with the electrolyte to ensure work safety;
●It has a light weight and easy-to-make applicable electrode structure to improve the performance-price ratio of lithium-ion batteries;
●The manufacturing process is simple and the price is low to expand its application scope.
Lithium battery cathode material production process
Calcining technology uses a new microwave drying technology to dry lithium battery cathode materials, which solves the problems of conventional lithium battery cathode material drying technology that takes a long time, slows capital turnover, uneven drying, and insufficient drying depth.
Solid phase method: Generally, lithium salts such as lithium carbonate and cobalt compounds or nickel compounds are ground and mixed, and then the sintering reaction is carried out. The advantage of this method is that the process flow is simple and the raw materials are easily available. It is a method that has been widely researched, developed and produced in the early stages of the development of lithium batteries, and foreign technology is relatively mature. The disadvantages are that the produced cathode material has limited capacitance, poor mixing uniformity of the raw materials, and poor performance of the prepared materials. The stability is not good and the quality consistency between batches is poor.
In the field of lithium battery cathode materials, any minor technological innovation is likely to set off a new round of market expansion. Chinese companies should strengthen research and development of key cathode material technologies, gain an international leading position, enhance core competitiveness, and compete in international competitions. Gained the advantage.
Compared with other lithium battery cathode materials, olivine-structured lithium iron phosphate has the advantages of safety, environmental protection, cheapness, long cycle life, and good high-temperature performance. It is one of the most promising 23A battery cathode materials.
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