Optically transparent polymer electrolyte films
AssigneeDelStar Technologies, Inc.
InventorsNandan Ukidwe, James Kidwell, Dave Collette
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Abstract
Provided are electrolyte films or cells for use in variety of applications, such as electrochromic windows. An electrolytic film comprises a polymer layer, such as thermoplastic polyurethane or polymethyl methacrylate, and an electrolyte within the polymer layer. The electrolyte comprises a salt and a plasticizer. The plasticizer comprises one or more materials that are selected to provide sufficient conductivity and optical transparency for operation of the electrolyte film in an application requiring substantial optical clarity and switching speed, such as a smart window.
Claims34
An electrolyte film comprising:
- a polymer layer;
- an electrolyte within the polymer layer, wherein the electrolyte comprises a salt and a plasticizer;
- and
- wherein an Ra between the plasticizer and the polymer layer is less than about 5.
An electrolyte film comprising:
- a polymer layer;
- an electrolyte within the polymer layer, wherein the electrolyte comprises a salt and a plasticizer;
- and
- wherein the film comprises a haze of 2% or less as measured by ASTM D1003-13 and an ionic conductivity of at least about 3.85×10−5 Siemens/cm.
An electrolyte film comprising:
- a polymer layer;
- an electrolyte within the polymer layer, wherein the electrolyte comprises a salt and a plasticizer;
- and
- wherein the plasticizer comprises an organic carbonate and a material selected from the group consisting of dibenzoate, an acrylate monomer, a phthalate, an aliphatic ester, a non-aliphatic ester, an ethylene glycol bis, a trimellitate, a sebacate, an adipate, a terephthalate, a gluterate, a glyceride, an azelate, a maleate, an epoxidized soybean oil, glycols and polyethers, organophosphates, alkyl citrates, glycerol and acetylated monoglycerides or a mixture thereof.
The film of about 21, wherein the material comprises at least 20% by volume of the plasticizer.
An electrochromic cell comprising:
- first and second layers of an optically transparent material;
- and
- an ion conductive layer between the first and second layers, the ion conductive layer comprising:
- a polymer layer;
- a salt;
- and
- a plasticizer, wherein an Ra between the plasticizer and the polymer layer is less than about 5.
Dependencies are inferred from the claim text.