3.Sodium Ion Battery Cathode Materials Sodium ion battery cathode materials can be classified based on their crystal structures into oxide-based materials (layered and tunnel structures), Prussian blue analogs, phosphate fluorides, phosphates, sulfates, and others. Among them, layered oxides, polyanion compounds, and Prussian blue analogs are the three mainstream cathode routes. Currently, each of these three…

1.Introduction to Basic Information Sodium-ion batteries are rechargeable batteries that primarily rely on the movement of sodium ions (Na+) between the positive and negative electrodes to function, similar to the working principle of lithium-ion batteries. During the charge and discharge process, Na+ shuttles between the two electrodes: during charging, Na+ is deintercalated from the positive electrode…

  5. Cathode Different electrodes are used in different products. LFP 4680 is used in low-range vehicles and energy storage batteries, focusing on providing more cycle times. Nickel-manganese 4680 batteries are used in medium-range vehicles and household batteries. High-nickel 4680 batteries are used in the Cybertruck and Semi. Tesla’s cathode material focuses on high-nickel and…

3. Dry electrode technology: This technology can be used on both positive and negative electrode. Traditional wet process: The material needs to be placed in a solution, then dried and pressed into a film: use a solvent with a binder material, of which NMP is one of the common solvents.  After mixing the solvent with…

The composition, content and detection system are the most critical links in the back-end process. The composition and capacity of the lithium battery cell is to realize the initialization of the battery by charging and discharging, and activate the active material of the cell, which is a process of energy conversion. The composition and capacity…

Control the amount of liquid electrolyte and injection time, so that the liquid electrolyte is injected into the battery from the liquid injection port. The main purpose is to form ion channels, so as to ensure that the battery has enough lithium ions to migrate between the positive and negative electrodes during the charging and…

When the stacking machine is used in the production of pouch batteries, it can achieve higher performance and safety than cylindrical and prismatic batteries. The stacking machine stacks the positive electrode sheet, separator, and negative electrode sheet in order to form a small battery cell, and then stacks the small battery cells in parallel to…

Tension control is the core technology that affects the advanced degree of winding machine. During the entire winding process, in order to ensure the high consistency of the battery assembled from the cells, special attention should be paid to the tension control of the winding. The difference in tightness caused by tension fluctuations will cause…

The function of the slitting machine is to slit the rolled electrode sheet to the required width, which is the key process before winding. The low-end slitting machine has low mechanical precision and simple tension control, which cannot adapt to the slitting of ultra-thin film materials. With the improvement of users’ requirements for slitting efficiency…

The significance of rolling is to compact the electrode sheet and increase the energy density of the battery. After the electrode sheet is coated and dried in the previous process, the peel strength between the active material and the foil is very low, so it needs to be rolled to enhance the bonding strength between…

The main purpose of coating is to evenly coat the slurry with good stability, good viscosity and good fluidity on the surface of copper foil or aluminum foil. Its significance to lithium batteries is mainly reflected in three aspects: consistency, cycle life, and safety. During the coating process, if the thickness of the positive and…