A method for manufacture a lithium ion battery in which titanium nitride is deposited on that surface of a positive electrode sheet

The invention relates to a manufacturing method of a lithium ion battery in which titanium nitride is deposited on the surface of a positive electrode sheet. The method comprises weighing lithium ironphosphate powder according to the mass ratio of (92-96): (1-4): (2-6), vacuum baking conductive carbon black and polyvinylidene fluoride powder respectively; Dispersing polyvinylidene fluoride powderin N-methyl pyrrolidone solution and stirring to obtain polyvinylidene fluoride glue; Adding conductive carbon black into polyvinylidene fluoride colloidal solution and then adding lithium iron phosphate powder into polyvinylidene fluoride colloidal solution to obtain lithium iron phosphate slurry; Sieved and coated on the upper and lower surfaces of the aluminum foil to obtain a lithium iron phosphate electrode sheet; A suspension of titanium nitride is prepare from titanium nitride nano-powder, sprayed on that upper and low surfaces of the electrode plates by an ultrasonic atomization preparation system, and finally