Electrochromic devices including a mica layer electrolyte
First Claim
1. A electrochromic device comprising at least one solid inorganic electrochromic layer, a solid electrolyte layer in contact with the electrochromic layer which is permeable to cations but substantially impermeable to electrons, and electrode means for applying an electrical potential across the electrolyte and electrochromic layers, characterized in that the solid electrolyte layer comprises polycrystalline mica, the mica crystals in the layer not exceeding about 20 microns in their largest dimension and containing at least one species of exchangeable interlayer cation selected from the group consisting of Na+, Li+ and H+.
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Abstract
Electrochromic devices comprising anodic and/or cathodic electrochromic elements in combination with an ion-permeable polycrystalline mica electrolyte, the electrolyte comprising mica crystals containing exchangeable Na+, Li+ and/or H+ interlayer cations and optionally being provided as a self-supporting, flexible, transparent or opaque electrolyte sheet, are described.
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Citations
13 Claims
- 1. A electrochromic device comprising at least one solid inorganic electrochromic layer, a solid electrolyte layer in contact with the electrochromic layer which is permeable to cations but substantially impermeable to electrons, and electrode means for applying an electrical potential across the electrolyte and electrochromic layers, characterized in that the solid electrolyte layer comprises polycrystalline mica, the mica crystals in the layer not exceeding about 20 microns in their largest dimension and containing at least one species of exchangeable interlayer cation selected from the group consisting of Na+, Li+ and H+.
Specification