Reversible electrodeposition device with ionic liquid electrolyte
First Claim
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1. A reversible electrodeposition device for controlling the propagation of electromagnetic radiation, comprising:
- a first electrode which is substantially transparent to the radiation;
a second electrode; and
an ionic liquid electrolyte disposed between and in electrical contact with said first and second electrodes, said ionic liquid electrolyte comprising;
ions of an electrodepositable metal, organic cations, and complexing anions, such that a negative electrical potential applied to the first electrode relative to the second electrode tends to cause metal to be electrodeposited from the electrolyte onto the first electrode, and such that a positive electrical potential applied to the first electrode relative to the second electrode tends to cause deposited metal to be dissolved from the first electrode, wherein the amount of deposited metal subsisting on the first electrode affects the propagation of radiation by the device.
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Abstract
The present invention is a reversible electrodeposition optical modulation device employing an ionic liquid electrolyte, which is comprised of a mixture of an ionic organic compound and the salt of an electrodepositable metal. The solventless ionic liquid can contain very high concentrations of electrodepositable metal ions and provides the high current carrying capability needed for fast device switching. Switching uniformity is also significantly improved since the electrolyte resistance is at least an order of magnitude higher than that of typical solvent-based electrolytes. Fast switching and good cycle life for high quality mirror electrodeposits in reversible electrochemical mirror (REM) devices was demonstrated. Best results were obtained for novel silver halide electrolytes employing pyrrolidinium and N-methylpyrrolidinium cations.
47 Citations
11 Claims
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1. A reversible electrodeposition device for controlling the propagation of electromagnetic radiation, comprising:
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a first electrode which is substantially transparent to the radiation;
a second electrode; and
an ionic liquid electrolyte disposed between and in electrical contact with said first and second electrodes, said ionic liquid electrolyte comprising;
ions of an electrodepositable metal, organic cations, and complexing anions, such that a negative electrical potential applied to the first electrode relative to the second electrode tends to cause metal to be electrodeposited from the electrolyte onto the first electrode, and such that a positive electrical potential applied to the first electrode relative to the second electrode tends to cause deposited metal to be dissolved from the first electrode, wherein the amount of deposited metal subsisting on the first electrode affects the propagation of radiation by the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A reversible electrodeposition device for controlling the propagation of electromagnetic radiation, comprising:
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a first electrode which is substantially transparent to the radiation;
a second electrode; and
an ionic liquid electrolyte disposed between and in electrical contact with said first and second electrodes, said ionic liquid electrolyte comprising;
ions of an electrodepositable metal selected from the group consisting of silver, copper, tin, zinc, palladium, bismuth, cadmium, mercury, indium, lead, antimony, thallium and alloys thereof, heterocyclic organic cations selected from the group consisting of N-methylpyrrolidinium, pyrrolidinium, 1-ethyl-3-methylimidazolium, 1-N-butylpyridinium, 2-methyl-1-pyrrolinium, 1-ethyl-midazolium and mixtures thereof, and complexing anions selected from the group consisting of chloride, bromide, iodide, cyanide and thiocyanate, such that a negative electrical potential applied to the first electrode relative to the second electrode tends to cause metal to be electrodeposited from the electrolyte onto the first electrode, and such that a positive electrical potential applied to the first electrode relative to the second electrode tends to cause deposited metal to be dissolved from the first electrode, wherein the amount of deposited metal subsisting on the first electrode affects the propagation of radiation by the device.
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Specification
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Current AssigneeInnovative Technology Licensing LLC
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Original AssigneeInnovative Technology Licensing LLC
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InventorsWarren, Leslie F. Jr., Tench, D. Morgan
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Primary Examiner(s)Ben, Loha
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Application NumberUS10/066,210Time in Patent Office446 DaysField of Search359/265, 359/266, 359/267, 359/268, 359/269, 359/270, 359/271, 359/272, 359/273, 359/274, 359/275, 359/321, 205/234, 204/290.07, 204/266, 428/323, 428/426, 252/583, 252/600US Class Current359/321CPC Class CodesG02F 1/1506 caused by electrodeposition...
