Polymer ion-conducting membrane, polymer ion-conducting membrane for secondary battery, composite ion-permeable membrane, electrode assembly, and secondary battery

The present invention pertains to a polymer ion-conducting membrane having an in-membrane ion transport resistance of 100 Omega or less at 25 DEG C, and having a thickness of the membrane after immersion treatment under the following conditions 1 and 2, respectively, of 2.5 times or less of the thickness of the membrane before immersion treatment. (Condition 1) In a solution in which ethylene carbonate (EC) and diethyl carbonate (DEC) are mixed at a volume ratio of 1/1, immersion is performed at 25 DEG C for 24 hours. (Condition 2) In a 0.1 M sodium hydroxide aqueous solution, dipping is carried out at 25 DEG C for 24 hours. 本发明涉及一种聚合物离子传导膜，其在25℃下的膜内离子传输电阻为100Ω以下，分别在以下条件1和条件2下进行浸渍处理后的膜的厚度均为浸渍处理前的膜的厚度的2.5倍以下。(条件1)在将碳酸亚乙酯(EC)和碳酸二乙酯(DEC)以体积比1/1混合而成的溶液中，在25℃下浸渍24小时。(条件2)在0.1M的氢氧化钠水溶液中，在25℃下浸渍24小时。