SEPARATION MEMBRANE FOR REDOX FLOW SECONDARY BATTERY AND REDOX FLOW SECONDARY BATTERY COMPRISING THE SAME

摘要

The redox flow secondary battery includes an electrolytic cell including a positive electrode cell, a negative electrode cell, and a separation membrane that separates the positive electrode cell and the negative electrode cell. Moreover, the above described redox flow secondary battery is configured as follows. That is, the separation membrane has a microporous membrane and an ion-exchange resin layer contacting the microporous membrane, and the air resistance of the separation membrane per thickness of 200 μm is 10000 sec/100 cc or more. Furthermore, the microporous membrane includes a polyolefin resin or a vinylidene fluoride resin and an inorganic filler. Further, the smoothness of at least a surface of the microporous membrane contacting the ion-exchange resin layer is 16000 seconds or less.

主权项

1: A redox flow secondary battery comprising an electrolytic cell, the electrolytic cell comprising:
a positive electrode cell, a negative electrode cell, and a separation membrane that separates the positive electrode cell and the negative electrode cell, wherein the separation membrane comprises a microporous membrane and an ion-exchange resin layer contacting the microporous membrane, and an air resistance of the separation membrane per thickness of 200 μm is 10000 sec/100 cc or more, the microporous membrane comprises a polyolefin resin or a vinylidene fluoride resin and an inorganic filler, and a smoothness of at least a surface of the microporous membrane contacting the ion-exchange resin layer is 16000 seconds or less.