Modified fluorine-containing sulfonic acid resin, membrane and application of modified fluorine-containing sulfonic acid resin and membrane in field of flow batteries

• Main Authors: LEE YOUNGUL, WANG LI, GONG YUXIN, MA XIAOJUAN, JIANG YUNHU, ZOU YECHENG, ZHANG HENG
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRICITY; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; LAUNDERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF TEXTILES OR THE LIKE; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL; WORKING-UP

The invention belongs to the technical field of high polymer materials, and relates to a modified fluorine-containing sulfonic acid resin, a membrane and application of the modified fluorine-containing sulfonic acid resin and the membrane in the field of flow batteries, the modified fluorine-containing sulfonic acid resin is composed of fluorine-containing sulfonic acid resin and sulfonated titanium dioxide, the modified fluorine-containing sulfonic acid resin comprises 90-99.9 wt% of fluorine-containing sulfonic acid resin, 0.1-10 wt% of sulfonated titanium dioxide, 0.1-10 wt% of fluorine-containing sulfonic acid resin and 0.1-10 wt% of sulfonated titanium dioxide, the sulfonation degree DS of the sulfonated titanium dioxide is 60%-75%. When the prepared modified fluorine-containing sulfonic acid resin and membrane are applied to a flow battery, the permeability and swelling rate of metal ions can be reduced, meanwhile, the water absorption capacity of a perfluorosulfonic acid resin membrane is improved, the