The olivine structure of LiFePO4 as the positive electrode of the battery, connected by aluminum foil to the positive electrode of the battery, the middle is the polymer diaphragm, which separates the positive electrode from the negative electrode, but lithium ions Li+ can pass through but not electron e-, the right is the negative electrode of the battery composed of carbon (graphite), connected by copper foil to the negative electrode of the battery.
Lithium iron phosphate battery in the charging, the lithium ion Li + in the positive electrode through the polymer diaphragm to the negative electrode migration; in the discharge process, the lithium ion Li + in the negative electrode through the diaphragm to the positive electrode migration. Lithium-ion battery is named for the lithium ion migration back and forth during charging and discharging.
Lithium iron phosphate battery is now the safest lithium-ion battery cathode information, its olivine structure in the oxygen is difficult to precipitate, improving the stability of the information. Lithium iron phosphate battery pack through strict safety testing, even in traffic accidents will not produce an explosion. When the lithium iron phosphate battery charging and discharging, because the iron ion oxidation is not strong, will not release oxygen, it is naturally difficult to produce oxidation recovery reaction with the electrolyte, which makes the lithium iron phosphate battery charging and discharging process in a safe environment. Lithium iron phosphate crystal in the P-O bond is stable, difficult to divide, even at high temperatures or overcharge will not be the same as lithium cobalt acid structure collapse heat or the formation of strong oxidizing substances, so lithium iron phosphate batteries have outstanding safety.