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US 10,096,855 B2Granted
Redox flow cell membrane
AssigneeSumitomo Electric Industries, Ltd.
InventorsHirokazu Katayama, Yasuhiro Okuda, Naoki Shimbara, Toshio Shigematsu, Yongrong Dong, Kei Hanafusa, Fumihiro Hayashi, Aya Ooya
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Abstract
A redox flow cell membrane includes a porous membrane that has a mean flow pore size of not more than 100 nm, that has a thickness of not more than 500 μm, and that has an air flow rate of not less than 0.1 ml/s·cm2. When the redox flow cell membrane is used for a V—V-based redox flow cell, the porous membrane preferably has a mean flow pore size of not more than 30 nm.
Claims4
A redox flow cell comprising:
- a membrane disposed between a positive electrode chamber and a negative electrode chamber,
- the membrane comprising a porous membrane that has unfilled pores, that has a mean flow pore size of not more than 100 nm, that has a thickness of not more than 500 μm, and that has an air flow rate of not less than 0.1 ml/s·cm2, and
- the porous membrane being made of a fluorine-based resin,
- wherein said porous membrane has a surface treated with an ion exchange resin.
1 more element
Dependencies are inferred from the claim text.