Low-temperature lithium iron phosphate battery as well as pole piece and preparation method thereof

The invention discloses a low-temperature lithium iron phosphate battery as well as a pole piece and a preparation method thereof, and belongs to the technical field of lithium iron phosphate batteries. A current collector adopted by the battery pole piece is a carbon-coated copper foil, and solute in adopted coating slurry contains 2-3wt% of CMC (Carboxymethyl Cellulose), 2-3wt% of SBR (Styrene Butadiene Rubber), 1.5-2.5 wt% of Super-P, 1-2wt% of VGCF (Vacuum Growth Carbon Fiber) and the balance of graphite. By reducing the content of the SBR, the increase amplitude of the RCT of the battery under the low-temperature condition is reduced, and the low-temperature characteristic of the battery is improved. The reduction of the SBR enables the bonding firmness of the graphite on the copper foil to be reduced, and the carbon-coated copper foil process is adopted, so that excellent static conductivity can be provided, micro-current of active substances can be collected, the contact resistance between the graphite