Electrochromic pane
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United States of America Patent
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Aug 11, 1998
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N/A
app pub date -
Jun 4, 1997
filing date -
Jun 11, 1993
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Abstract
An electrochromic system comprising a transparent electrically conducting film (2), a film (3) of a cathodic electrochromic material, which is capable of reversibly inserting M.sup.+ cations of type H.sup.+ or Li.sup.+, an electrolyte film (5), counter-electrode film (7) made of an anodic electrochromic material, and a second electrically conducting film (8), said structure having a barrier film (6) interposed between electrolyte (5) and the counter-electrode (7), which barrier film is open to the diffusion of the M.sup.+ cations and which is constituted of the following materials selected from the group consisting of oxides of metals of Group VB of the Periodic Table, mixtures of these oxides, CeF.sub.3, Sb.sub.2 O.sub.3, HUP (hexauranylphosphate), Cr.sub.2 O.sub.3, ZrO.sub.2, and an ion conductor material of Li.sub.3 N, LiTaO.sub.3, LiAlF.sub.4, Li.sub.3 PO.sub.4, LiBO.sub.2 or LiNbO.sub.3.
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