Solvent processing method for polymer porous ion conducting membrane for flow battery

• Main Authors: YUAN ZHIZHANG, LI XIANFENG, ZHAO YUYUE, ZHANG HUAMIN, LU WENJING
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a solvent processing method for a polymer porous ion conducting membrane for a flow battery; a polymer porous ion conducting membrane is placed in a processing solvent and soaked for 20 min or more, and then the film is placed at the temperature of 10-50 DEG C to make the solvent volatilized for 10 h or more; the polymer porous ion conducting membrane is prepared by one or two or more of organic polymer resins containing no ion exchange groups and used as raw materials. The porous ion conducting membrane after solvent processing has smaller pore size and also has high hole connectivity before processing, therefore, the porous ion conducting membrane has high ionic selectivity and proton conductivity as well as excellent oxidation stability. An all-vanadium flow battery assembled by the polymer porous ion conducting membrane has good cycle life and good battery efficiency. 本发明涉及种液流电池用聚合物多孔离子传导膜的溶剂处理方法，将聚合物多孔离子传导膜置于处理溶剂中浸泡20min以上，然后将膜置于10-50℃下挥发溶剂10h以上；聚合物多孔离子传导膜是由不含离子交换基团的有机高分子树脂中的种或二种