The invention provides a reactive polymer-supporting porous film for use as a battery separator which comprises a porous substrate film and a partially crosslinked reactive polymer supported on the porous substrate film, the partially crosslinked reactive polymer being obtained by the reaction of a crosslinkable polymer having at least one reactive group selected from the group consisting of 3-oxetanyl group and epoxy group in the molecule with a monocarboxylic acid.
The invention further provides a method of manufacturing a battery which comprises layering electrodes on the reactive polymer-supporting porous film to obtain an electrode/reactive polymer-supporting porous film layered body; placing the electrode/reactive polymer-supporting porous film layered body in a battery container; introducing an electrolytic solution containing a cationic polymerization catalyst into the battery container so that at least a portion of the reactive polymer is swollen or dissolved in the electrolytic solution at least in the vicinity of the interface of the porous film and the electrodes and cationically polymerized so that the electrodes are bonded to the porous film.
本发明提供了一种反应性聚合物支撑多孔膜,用作电池隔膜,包括多孔基底膜和部分交联的反应性聚合物,所述部分交联的反应性聚合物是通过将至少具有3-氧杂环基团和环氧基团之一的反应性基团的交联聚合物与单
羧酸反应而获得的。本发明还提供了一种制造电池的方法,包括将电极层覆盖在反应性聚合物支撑的多孔膜上,以获得电极/反应性聚合物支撑的多孔膜层状体;将电极/反应性聚合物支撑的多孔膜层状体放置在电池容器中;将含有阳离子聚合催化剂的电解液引入电池容器中,使反应性聚合物至少在多孔膜和电极的界面附近在电解液中肿胀或溶解,并通过阳离子聚合使电极与多孔膜结合。