HIGH-WETTING LONG-CYCLE ALUMINA CERAMIC SLURRY AND PREPARATION METHOD THEREFOR, AND LITHIUM BATTERY DIAPHRAGM

摘要

A high-wetting long-cycle alumina ceramic slurry and a preparation method therefor. The alumina ceramic slurry comprises the following raw materials: solid alumina, a dispersant, a wetter, a binder, a thickener, a defoamer, and pure water. The solid alumina comprises: high pore volume alumina and/or low pore diameter alumina; wherein the pore volume distribution of the high pore volume alumina is 0.4-3.0 ml/g, and the pore diameter distribution of the low pore diameter alumina is 0.1-5 nm. A lithium battery diaphragm comprises a PE film and the alumina ceramic slurry coated on the PE film. The use of the solid alumina greatly reduces the wetting time of the diaphragm and improves the production efficiency of batteries.