| abstract |
The invention discloses a lithium battery separator, comprising a porous ceramic fiber base film and a high molecular polymer coating compounded on at least one side of the base film, the high molecular polymer coating comprising polyvinylidene fluoride, polyvinylidene fluoride -At least one of hexafluoropropylene and polyacrylate. The invention also discloses a preparation method of the lithium battery separator. The diaphragm of the invention has high mechanical strength, good insulation performance, high melting point, can still maintain a complete shape at <1000° C., has good chemical corrosion resistance and low thermal conductivity, uniform pore size distribution, and has a relatively high temperature. Good porosity, good affinity with the electrolyte, and a certain bonding function with the positive electrode and negative electrode. , has high safety performance under extreme safety test. |