Inorganic microporous ion exchange membranes for redox flow batteries
AssigneesUniversity of Cincinnati, Bettergy Corp.
InventorsJunhang Dong, Zhi Xu, Lin-Feng Li, Ruidong Yang
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Abstract
A composite structure comprising a layer of zeolite having a high silica to alumina ratio supported on a support layer acts as a separator in a redox flow battery. The zeolite can be either supported on a rigid substrate, such as alumina, or a flexible substrate, such as a polymeric film. The polymeric film, in particular, can be an ion exchange membrane such as Nafion. The zeolite layer with a high silica to aluminum ratio provides a long-lasting separator for redox flow batteries.
Claims10
A redox flow battery comprising:
- a first oxidizing reaction chamber and a second reducing reaction chamber separated by a separator;
- wherein said separator comprises a zeolite layer on a support, wherein said zeolite layer comprises aluminosilicate having a silicon to aluminum ratio of at least 10;
- wherein said battery operates on electrode reactions of dissolved redox metal ion couples separated by said separator.
A redox flow battery comprising:
- a first oxidizing reaction chamber and a second reducing reaction chamber separated by a separator;
- wherein said separator comprises a zeolite layer on a support, said zeolite layer comprising aluminosilicate having a silicon to aluminum ratio of at least 10;
- and
- wherein said redox flow battery is one of a vanadium battery, zinc-cerium battery, zinc-bromine battery, iron chromium battery, vanadium bromine battery and sodium polysulfide-bromine battery.
A redox flow battery comprising:
- a first oxidation reaction chamber, a second reducing reaction chamber separated by a separator;
- wherein said battery operates on electrode reactions of dissolved redox metal ion couples separated by said separator;
- wherein said separator comprises a zeolite layer on a support;
- wherein said zeolite layer has a silicon to aluminum ratio of 10 to 50.
Dependencies are inferred from the claim text.