6F22 carbon battery.Operation process of iron lithium batteries

　　Lithium iron phosphate battery is actually a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. Regarding lithium-ion batteries, there are various positive electrode materials such as lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, and lithium iron phosphate. Among them, lithium iron phosphate is the most commonly used material in the lithium battery industry today.

　　Lithium iron phosphate batteries are connected to the positive electrode by aluminum foil, with a polymer barrier on the left that separates the positive electrode from the negative electrode. However, the lithium ion Li can start and end, while the electron e - cannot start and end. On the right is the negative electrode of the battery composed of carbon, which is connected to the negative electrode by copper foil. The electrolyte of the battery is between the upper and lower ends, and the battery is enclosed in a metal shell. LiFePO4 batteries are charged, The lithium ion Li polymer barrier in the positive electrode migrates towards the negative electrode; During the discharge process, the lithium ion Li in the negative electrode moves back and forth to the positive electrode, and the lithium-ion battery is named after the lithium ion moves back and forth during charging and discharging.

　　The working principle of lithium-ion batteries is that when the battery is charged, Li moves from the 010 surface of the lithium iron phosphate crystal to the surface of the crystal. Under the effect of electric field force, Li enters the electrolyte, passes through the barrier, and then moves to the surface of the graphite crystal through the electrolyte. Then, it is embedded in the graphite lattice. After the lithium ion is removed from the lithium iron phosphate crystal, the lithium iron phosphate is converted into iron phosphate; When the battery is discharged, Li is detached from the graphite crystal, enters the electrolyte, passes through the barrier, and then moves to the surface of the lithium iron phosphate crystal through the electrolyte. It is then re embedded into the lattice of the lithium iron phosphate crystal through the 010 surface, and flows through the conductor to the positive electrode of the lithium iron phosphate to start discharging.

　　To align the conductivity of the positive and negative electrodes of lithium iron phosphate batteries, it is necessary to add a conductive agent to the positive and negative electrodes of the battery, so that it can be formed in the active capacity of the battery. In the process of theoretical description and production, it is necessary to describe a series of experiments to verify how to end the above three equations. Establishing a mathematical model or a historical formula may be necessary, and then these models or formulas may be used to describe the lithium-ion battery from beginning to end.

　　At that time, the domestic lithium-ion battery technology was so advanced that it had a world leading level. At that time, the industry still focused on lithium-ion batteries with lithium iron phosphate materials as the positive electrode. Many countries also developed new lithium-ion battery materials, but there was no large-scale production at that time. Some scholars pointed out that at least 10 years ago, lithium iron phosphate positive electrode materials were the main stream of open industry.

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