Traditional Culture Encyclopedia - Traditional stories - In lithium iron phosphate materials, we need to remove metal impurities and dope them. Why?

In lithium iron phosphate materials, we need to remove metal impurities and dope them. Why?

Doping metal ions into lithium ferrous phosphate is one of the effective means to improve the internal conductivity of lithium ferrous phosphate particles. After doped metal ions enter the crystal, they will cause lattice defects in the material, thus fundamentally improving the conductivity of the material. Compared with carbon doping or carbon coating, metal ion doping will not reduce the tap density of the material, which is beneficial to improve the energy density of iron phosphate lithium ion battery.