Electrochromic devices with improved processability and methods of preparing the same
First Claim
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1. A process for preparing an electrochemically active layer on a substrate comprising the steps of:
- (a) forming a liquid mixture of an electrochemically active material and an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents;
(b) contacting the liquid mixture to the substrate; and
(c) optionally exposing said contacted substrate to a temperature for a sufficient length of time for the electrochromically-inert additive to reduce or oxidize the electrochemically active material.
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Abstract
Electrochromic devices and processes for preparing the same are provided which do not require a separate process step of ion intercalation by employing an electrochromically-inert reducing or oxidizing additive in the electrochemically active material or the electrolyte of the electrochromic devices.
71 Citations
35 Claims
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1. A process for preparing an electrochemically active layer on a substrate comprising the steps of:
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(a) forming a liquid mixture of an electrochemically active material and an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents;
(b) contacting the liquid mixture to the substrate; and
(c) optionally exposing said contacted substrate to a temperature for a sufficient length of time for the electrochromically-inert additive to reduce or oxidize the electrochemically active material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for preparing an electrochromic device having two opposed electrodes, at least one of which is transparent, an electrochemically active layer disposed on an opposing face of one of said electrodes and an electrolyte disposed between said electrochemically active layer and an other opposing face of said electrodes, said process comprising the steps of:
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(a) forming said electrochemically active layer on said opposing face of one of said electrodes by contacting said opposing face with a liquid mixture of an electrochemically active material and an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents;
(b) optionally exposing said liquid mixture contacted opposing face to a temperature for a sufficient length of time for the electrochromically-inert additive to reduce or oxidize the electrochemically active material;
(c) assembling said electrodes in a spaced-apart opposing relationship with said electrochemically active layer facing said other opposing face of said electrodes to form a cell; and
(d) filling said cell with an electrolyte. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A process for preparing an electrochromic device having two opposed electrodes, at least one of which is transparent, an electrochemically active layer disposed on an opposing face of one of said electrodes and an electrolyte disposed between said electrochemically active layer and an other opposing face of said electrodes, said process comprising the steps of:
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(a) forming said electrochemically active layer comprised of an electrochemical active material on said opposing face of one of said electrodes;
(b) assembling said electrodes in a spaced-apart opposing relationship with said electrochemically active layer facing said other opposing face of said electrodes to form a cell;
(c) filling said cell with an electrolyte containing an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents; and
(d) optionally exposing said filled cell to a temperature for a sufficient length of time for the electrochromically-inert additive to reduce or oxidize said electrochemically active material. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification