Method for preparing lithium ion battery deposited with titanium nitride on surface of high-nickel ternary positive electrode pole piece

The invention relates to a method for preparing a lithium ion battery deposited with titanium nitride on the surface of a high-nickel ternary positive electrode pole piece. The specific method is as follows: weighing high-nickel ternary positive electrode powder, carbon nanotube slurry and polyvinylidene fluoride powder according to a mass ratio, weighing N-methylpyrrolidone, preparing high-nickel ternary positive electrode slurry, coating sieved high-nickel ternary positive electrode slurry on upper and lower surfaces of an aluminum foil by using a transfer coating machine to obtain the high-nickel ternary positive electrode pole piece; preparing titanium nitride suspension by using titanium nitride nanopowder; spray coating the titanium nitride suspension on the surface of the high-nickel ternary positive electrode pole piece by using an ultrasonic atomization preparation system to obtain the high-nickel ternary positive electrode pole piece deposited with titanium nitride on the surface of the pole piece;