Inorganic microporous ion exchange membranes for redox flow batteries
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United States of America Patent
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Mar 6, 2018
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Aug 7, 2014
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Aug 9, 2013
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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.
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