Electrochromic devices with improved processability and methods of preparing the same
First Claim
1. An electrochromic device comprising two opposed conducting 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, wherein said electrolyte contains an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents in an effective amount to reduce or oxidize an electrochemically active material in said electrochemically active layer, wherein the reducing agents are selected from the group consisting of oxalic acid, ascorbic acid, mercaptans, hydrazines, amines, organo lithium and mixtures thereof and the oxidizing agents are selected from the group consisting of persulfates, peroxides, nitrosonium salts and mixtures thereof.
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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.
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Citations
25 Claims
- 1. An electrochromic device comprising two opposed conducting 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, wherein said electrolyte contains an electrochromically-inert additive selected from the group consisting of reducing agents and oxidizing agents in an effective amount to reduce or oxidize an electrochemically active material in said electrochemically active layer, wherein the reducing agents are selected from the group consisting of oxalic acid, ascorbic acid, mercaptans, hydrazines, amines, organo lithium and mixtures thereof and the oxidizing agents are selected from the group consisting of persulfates, peroxides, nitrosonium salts and mixtures thereof.
Specification