Lithium iron phosphate batteries need cobalt, solid-state batteries must use cobalt, and the proportion is higher than that of lithium-ion batteries, because lithium iron phosphate lithium-ion batteries are suitable for a large number of power grid energy storage. Polemonium (Polemonium) is a chemical element whose symbol is Co. The pure element is a hard, shiny, silver-gray metal.
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As the name suggests, from the material structure, as long as the battery material does not contain cobalt in the battery, it can be called cobalt-free battery. Although lithium iron phosphate batteries do not contain cobalt, strictly speaking, cobalt-free batteries are mainly for batteries that remove the cobalt element in ternary lithium batteries.
Lithium iron phosphate does not require the use of cobalt and nickel. The positive electrode material of lithium iron phosphate battery is lithium iron phosphate, and the negative electrode material is graphite or coke. The working principle is that lithium ions move between the positive and negative electrodes, respectively embedded and removed, to achieve battery charging and discharging. Therefore, there is no need to use cobalt and nickel in lithium iron phosphate batteries.