Electrochromic device structures
AssigneePolyceed Inc.
InventorsAnoop Agrawal, Lori Adams, John P. Cronin, Maha Achour
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Abstract
An integrated window structure having opposing substrates that sandwich an electrochromic coating, a dye layer and an ion-isolating mechanism. In some embodiments, this is a selective ion-conductive layer and other embodiments incorporate nanostructures and polymers to tether the dye ions; these methods prevent dye ions from transporting into the electrochromic layer during redox activity. Control and systems to integrate the electrochromic elements in windows is provided.
Claims21
An electrochromic device comprising a pair of electrodes separated by an electrolyte film
- (a) wherein at least one of the said electrodes comprises conductive carbon nanotubes in a concentration of less than 2% by weight and at least one redox material and
- (b) the said conductive carbon nanotubes have at least one of (i) metallic phase which is greater than 50% by weight and (ii) a free metal content which is less than 5% by weight.
A method of making an electrochromic device containing an electrolyte film and a first electrode comprising both conductive nanoparticles and a redox material, comprising forming said electrolyte film, depositing the said electrode on a first side of the electrolyte film to form a multilayered film, and then laminating the multilayered film between a pair of transparent substrates.
A window system containing an electrochromic device connected to a control system, wherein the device transitions from a higher energy state represented by a less transmitting optical state to a lower energy state represented by a higher optical transmitting optical state;
- the said control system is configured to recover at least 20% and less than 80% of the electrical energy difference contained in the said states of the device, when the device transitions from a lower transmitting optical state to a higher transmitting optical state, wherein the said electrochromic device contains an electrode having carbon nanotubes.
Dependencies are inferred from the claim text.