| 摘要 |
PROBLEM TO BE SOLVED: To provide a separator for lithium secondary batteries which is high in heat resistance and superior in internal resistance which avoids the risk that the rapid rise in temperature inside a battery causes the heat shrinkage of a separator, resulting in the electrode contact. ! SOLUTION: A separator for lithium secondary batteries comprises: a composite including a support and a porous ceramic layer including ceramic fine particles. In the separator, the ceramic fine particles are of a lithium alumina complex. The lithium alumina complex is lithium-containing γ-alumina, which is produced by adding lithium hydrogen carbonate, causing a hydrothermal synthesis under the heating condition of 90-200°C approximately, and then baking a product thus synthesized at 400-700°C approximately in a process in which an ammonium bicarbonate is caused to react with an aluminum salt of aluminum sulfate, aluminum sulfate ammonium aqueous solution or the like to obtain ammonium dawsonite. The lithium |
