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 polycarboxylic acid. The reactive polymer-supporting porous film for use as a battery separator has a separator and electrodes sufficiently bonded to each other and low inner resistance so that it is suitably used for production of battery excellent in high rate performance. Further, the invention provides a method of producing a battery which comprises 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 thereby bonding the porous film and the electrodes together.
本发明提供一种反应性聚合物支持多孔膜,用于作为电池隔膜,包括多孔基底膜和部分交联的反应性聚合物支持在多孔基底膜上,所述部分交联的反应性聚合物是通过交联性聚合物与多
羧酸反应而得到的,所述交联性聚合物在分子中至少具有3-氧杂环基团和环氧基团中的一种反应性基团。作为电池隔膜使用的反应性聚合物支持多孔膜,具有足够紧密结合的隔膜和电极以及低内阻,因此适用于生产高速性能优异的电池。此外,本发明还提供一种电池的制造方法,其中包括将电极/反应性聚合物支持多孔膜层状体放置在电池容器中;向电池容器中引入含有阳离子聚合催化剂的电解液,从而将多孔膜和电极粘合在一起。