Gel polymers containing ionic liquids
First Claim
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1. An electrochromic cell comprising:
- a first transparent substrate comprising a first electrically conductive transparent electrode bonded to the first substrate and an electrochemically formed first electrochromic layer bonded to the surface of the electrode;
a second transparent substrate comprising a second electrically conductive transparent electrode bonded to the second substrate and an electrochemically formed second electrochromic layer bonded to the surface of the electrode; and
a transparent UV curable solid state cross linking gel polymer containing an ionic liquid comprising an organic salt with a melting point under about 100°
C. in contact with both the first and second electrochromic layer, wherein there is substantially no contact between the first and second electrochromic layers;
wherein the operating temperature of the electrochromic cell is from about −
30°
C. to about 95°
C.,and wherein the electrochromic cell is substantially free of oxygen and moisture.
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Abstract
An electrochromic cell of the present invention may include a first electrically conducting transparent electrode bonded to an electrochemically formed first electrochromic electrode on the surface of the electrode; a second electrically conducting transparent electrode bonded to an electrochemically formed second electrochromic electrode on the surface of the second electrode and a transparent gel polymer electrolyte formed from one or more macromonomers mixed with a plasticizer and an electrolyte salt, the gel polymer containing ionic liquids in contact with both the first and second electrochromic electrodes; the first and second electrochromic electrodes are separated from each other.
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Citations
33 Claims
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1. An electrochromic cell comprising:
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a first transparent substrate comprising a first electrically conductive transparent electrode bonded to the first substrate and an electrochemically formed first electrochromic layer bonded to the surface of the electrode; a second transparent substrate comprising a second electrically conductive transparent electrode bonded to the second substrate and an electrochemically formed second electrochromic layer bonded to the surface of the electrode; and a transparent UV curable solid state cross linking gel polymer containing an ionic liquid comprising an organic salt with a melting point under about 100°
C. in contact with both the first and second electrochromic layer, wherein there is substantially no contact between the first and second electrochromic layers;wherein the operating temperature of the electrochromic cell is from about −
30°
C. to about 95°
C.,and wherein the electrochromic cell is substantially free of oxygen and moisture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28)
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27. A method for making an electrochromic device comprising:
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photopolymerizing a gel polymer comprising at least one macromonomer, an ionic liquid, and a photoinitiator between a first electrochromic layer disposed on a first substrate and a second electrochromic layer disposed on a second substrate; and sealing the layers between the first substrate and the second substrate, wherein the electrochromic device is substantially free of oxygen and moisture. - View Dependent Claims (29, 31, 32, 33)
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30. A method for making an electrochromic device comprising:
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coating a first substrate with a first electrically conductive transparent electrode; coating a second substrate with a second electrically conductive transparent electrode; coating the first coated substrate with a first electrochromic layer; coating the second coated substrate with a second electrochromic layer wherein the first electrochromic layer and the second electrochromic layer are different; covering the first coated substrate with the first electrochromic layer with a transparent, UV curable solid state cross linking gel polymer mixture comprising one or more macromonomers, a photoinitiator and an ionic liquid; contacting the first coated substrate with the first electrochromic layer with the second coated substrate with the second electrochromic layer wherein the second electrochromic layer is in contact with the gel polymer and the first electrochromic layer is in contact with the gel polymer, and wherein there is substantially no contact between the first and second electrochromic layer; and sealing the layers between the first and second substrates wherein the device is substantially free of oxygen and moisture and substantially air and water tight.
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Specification