Method of coating separator films and electrodes for Li-ion batteries, and coated separator or electrode film

摘要

In the present invention, there is presented a method for the manufacture of a dense oxide coating to the surface of separator films (15, 22, 42) or electrode materials used in Li ion batteries by using pulsed laser technology, very short laser pulses (12) of less than 20 ps, and a pressure of at most 10"3 mbar in the coating chamber. The method makes it possible to improve the thermal, chemical and mechanical endurance of separator films (15, 22, 42) and electrode materials, and thus to pro¬ long the performance, safety and service life of Li ion batteries. In addition to the dense oxide coating, porous coatings fabricated with other methods can be used in the structure.