The positive electrode material of lithium ion battery is usually composed of lithium active compound, and the negative electrode is carbon with special molecular structure. The most important component of common positive electrode material is LiCoO2. When charging, the electric potential at the two poles of the electrode forces the compound of the positive electrode to release lithium ions and intercalate The negative electrode molecules are arranged in a sheet structure of carbon, and lithium ions are precipitated from the sheet structure of carbon during discharge, and recombine with the positive electrode compound, and the movement of lithium ions causes a current. Factors affecting cathode materials for lithium-ion batteries 1. Crystallinity If the crystal structure is well developed, the crystallinity will be high, which is conducive to the diffusion of Li+, and the electrochemical performance of the material will be good; otherwise, the electrochemical performance will be poor. 2. Synthesis time and synthesis temperature The synthesis time affects the degree of crystallinity development and reaction. The synthesis time is short, the reaction is incomplete, the crystallinity is not well developed, and there are impurity phases; if the time is too long, the prepared crystal structure may change greatly. The synthesis temperature affects the performance, structure and degree of reaction of the material. Although low-temperature synthesis can obtain smaller particles and large specific surface area, but at the same time, the reaction time is too long, the crystallization performance is poor, the reaction is incomplete, the impurity phase is large, and the electrochemical performance of the material is not good; the high-temperature synthesis reaction time is short, and the crystallization performance is better. The reaction is complete, but the particle size of the material is large, the specific surface area is small, and the electrochemical performance of the material is poor. 3. Granularity The particle size affects the specific surface area of the material. The particle size is too large, the specific surface area is small, and the adsorption of the particles is relatively poor. The positive electrode active material may be separated from the matrix and free in the electrolyte. Once in contact with the negative electrode material, it will cause a local battery short circuit. If the particle size is too small, the specific surface area is too large, the powder is very easy to agglomerate, it is difficult to disperse in the organic solvent, the active material of the electrode sheet is unevenly distributed, and the battery performance does not decrease; at the same time, the particle size is too fine, which easily causes surface defects and induces battery electrodes. To reduce the electrochemical energy of the positive electrode. ACEY provides battery raw material for battery research.

The function of the vacuum mixer is to mix the powdered raw materials with the liquid required by batteries after the ball milling. Built-in vacuum pump, mixing a small amount of chemicals and compounds under vacuum conditions to produce coating slurry and eliminate bubbles and prevent oxidation. The following are several types of vacuum stirrers: 1. 150ML Vacuum Mixer The stirring motor of this machine adopts gearbox frequency conversion adjustment, and different speed and torque can be selected according to different processes and different viscosities; In addition，the weight is 20Kg. Small size, can save space. 2. 250ML Planetary Vacuum Mixer The equipment is preferentially equipped with dual-shaft planetary stirring paddles and optional single-shaft blade stirring paddles. Different types and combinations of stirring shafts are configured according to the size of the stirring tank, so that the material is tossed up and down and the slurry is mixed quickly and evenly. 3. 1L Electric Vacuum Mixer This equipment is equipped with a 1L double-layer stainless steel container, the barrel body is made of high-quality 304 stainless steel, after finishing lathe, it is polished by a precision automatic polishing machine to ensure high precision; (The picture shows electric vacuum mixer and vacuum pump） 4. 5L-30L High Speed Planetary Dispersion Vacuum Mixer The equipment jacketed mixing tank design, can pass cooling water, suitable for various process requirements, with temperature controller and high temperature alarm system. Acey New Energy Technology Company is specialized in lithium battery industry, our company can provide you many kinds of Vacuum Mixer, if you are interested in it, feel free to contact us!

The manufacture of lithium battery equipment is closely related to its technological process. Generally speaking, the lithium battery process is roughly divided into three stages: pole piece production, battery cell assembly, and battery assembly. The corresponding lithium battery equipment can be divided into front end, middle end and back end. Front-end equipment includes mixers, coating machines, slitting machines, etc.; mid-end equipment includes winding machines, stacking machine, Electrolyte injection machines, etc.; back-end equipment includes battery cell tester, testing equipment, PACK automation equipment, etc. If equipment companies want to improve the competitive advantage, must work hard on equipment technology. On the one hand, shorten the delivery cycle and reduce inventory, on the other hand, reduce costs and optimize equipment. There are mainly the following three aspects. 1. Integration of functional modules. Made manufacturing process equipment functions of lithium batteries into all-in-one equipment to reduce the unnecessary material cost of the equipment and improve production efficiency. Only by reducing working procedures, optimizing the structure, simple process, the stability of the overall equipment will be better. 2. Integrate the industrial chain and reduce the transaction cost of enterprises. For those lithium battery equipment companies whose customers are not mainstream companies, the market will be squeezed. Horizontal integration between equipment companies will accelerate, 3. Leading technological breakthroughs, leading the production of battery technology. Most of them are developed around the battery technology that the battery company has determined, and only maintain technological leadership in one or a few links. If lithium battery equipment companies can grasp the manufacturing process, achieve technological breakthroughs, help battery companies reduce costs, and lead the development of battery technology, it will not be difficult to survive.