Modification method of lithium battery diaphragm with ceramic coating

The invention provides a modification method of a lithium battery diaphragm with a ceramic coating, which is characterized by comprising the following steps: coating a titanium aluminum lithium phosphate coating on a base material; carrying out magnetron sputtering on the lithium titanium aluminum phosphate coating to form an Al (2-x) Zn (1.5 x) O3 layer (0.2 lt); xlt; 0.3 part; an Al < 2-y > Zn < 1.5 y > O < 3 > layer is formed on the Al < 2-x > Zn < 1.5 x > O < 3 > through magnetron sputtering, and 0.4 lt; yt; Yt; 0.5 part; an Al < 2-z > Zn < 1.5 z > O < 3 > layer is formed on the Al < 2-y > Zn < 1.5 y > O < 3 > in a magnetron sputtering mode, zlt, zlt; 0.7, 0.7; and the Al < 2-z > Zn < 1.5 z > O < 3 > layer is coated with an aluminum oxide ceramic coating. 本发明提供了一种具有陶瓷涂层的锂电池隔膜的改性方法，其特征在于，方法包括：在基材上涂覆磷酸钛铝锂涂层；在磷酸钛铝锂涂层上磁控溅射Al2-xZn1.5xO3层，其中，0.2