The invention discloses a
nitride ceramic coating applied to a
lithium ion battery. The
nitride ceramic coating consists of the following components in parts by weight: 2-10 parts of
adhesive, 10-40 parts of
nitride ceramic particles, 0.5-3 parts of
thickening agent, 0.05-2 percent of dispersing agent and the balance of
solvent. The nitride
ceramic coating is prepared by the following steps: (1) preparing
slurry, namely uniformly mixing and stirring the
solvent, the dispersing agent and the
thickening agent, standing, defoaming, adding the nitride ceramic particles, uniformly dispersing and forming
slurry A; (2) dispersing at high speed, namely dispersing the
slurry A at high speed, then adding the additive, uniformly stirring, performing vacuum defoaming, and screening to form slurry B; (3)
coating, namely coating the slurry B on an edge of the
anode and / or the surface of the
cathode and / or a diaphragm in the
lithium ion battery, and
drying at the temperature of 60-120 DEG C. According to the nitride
ceramic coating, the liquid
absorption capacity and liquid retaining capacity of the diaphragm or the
pole piece can be effectively improved, the
hydrofluoric acid resistance and
thermal shock resistance of the
pole piece or the diaphragm are improved, and a better heat
barrier effect is achieved.