| abstract |
A composite structure 10 comprising a layer 12 of zeolite having a high silica to alumina ratio supported on a support layer 14 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. |