Electrolytes for use in electrochromic devices
First Claim
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1. In an electrochromic device which comprises a layer of persistent electrochromic material on an electrode surface in contact with an electrolyte solution, a counter-electrode also contacting said solution and electrical means for selectively applying electrical fields of opposite polarity across said electrodes, the improvement wherein said electrolyte solution comprises a lithium salt dissolved in a solvent selected from the group consisting of dimethylsulfite, nitromethane, and sulfolane.
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Abstract
Improved electrolytes for use in electrochromic devices are disclosed. These electrolytes are prepared by the incorporation of a lithium salt in a solvent selected from dimethylsulfite, nitromethane, and sulfolane.
27 Citations
7 Claims
- 1. In an electrochromic device which comprises a layer of persistent electrochromic material on an electrode surface in contact with an electrolyte solution, a counter-electrode also contacting said solution and electrical means for selectively applying electrical fields of opposite polarity across said electrodes, the improvement wherein said electrolyte solution comprises a lithium salt dissolved in a solvent selected from the group consisting of dimethylsulfite, nitromethane, and sulfolane.
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Current AssigneeAmerican Colloid Company (Minerals Technologies Incorporated)
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Original AssigneeAmerican Colloid Company (Minerals Technologies Incorporated)
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InventorsReddy, Thomas B.
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Primary Examiner(s)Padgett, Benjamin R.
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Assistant Examiner(s)Gron, T. S.
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Application NumberUS05/800,362Time in Patent Office461 DaysField of Search350/357, 252/408, 252/518, 252/500US Class Current359/270CPC Class CodesG02F 1/1525 characterised by a particul...
