Electrochemical mirror

• US 10,353,226 B2
• Filed: 09/27/2017
• Issued: 07/16/2019
• Est. Priority Date: 09/27/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Young Soo, Lee, Hyun Ho, Park, Tae Soon
• Primary Examiner(s): Ben, Loha
• Application Number:
  US15/716,715
• Publication Number:
  US 20180088362A1
• Time in Patent Office: 657 Days
• Field of Search: 359228, 359245, 359253, 359265-275, 345105, 252582, 252583, 252586, 362494, 257 40
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: C07C 309/66 Methanesulfonates
• CPC Class Codes: C07D 327/04 Five-membered rings
• CPC Class Codes: G02F 1/0102 Constructional details, not otherwise provided for in this subclass
• CPC Class Codes: G02F 1/0121 Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
• CPC Class Codes: G02F 1/061 based on electro-optical organic material G02F1/07, G02F1/13 take precedence
• CPC Class Codes: G02F 1/1506 caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 1/163 Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor

Abstract

An electrochemical mirror includes a first transparent electrode; a second transparent electrode disposed to be spaced apart from the first transparent electrode; and an electrolyte layer disposed between the first transparent electrode and the second transparent electrode and including an electrolyte solution, the electrolyte solution including a compound having a sulfonate functional group or a derivative compound having the same, as an electrolyte solution additive.

Claims

1. An electrochemical mirror comprising:

a first transparent electrode;

a second transparent electrode disposed to be spaced apart from the first transparent electrode; and

an electrolyte layer disposed between the first transparent electrode and the second transparent electrode and comprising an electrolyte solution, the electrolyte solution comprising a sulfonate compound having a sulfonate functional group or a derivative compound having the sulfonate functional group, as an electrolyte solution additive.

2. The electrochemical mirror according to claim 1, wherein the sulfonate compound has at least one among a cyclic form and a linear form.

3. The electrochemical mirror according to claim 2, wherein the sulfonate compound has the cyclic form which is represented by a Structural Formula 1:

4. The electrochemical mirror according to claim 3, wherein, in the one of the alkyl group, the alkene group, or the alkyne group, one of hydrogen atoms is substituted with the sulfonate compound, respectively.

5. The electrochemical mirror according to claim 3, wherein the Structural Formula 1 comprises more than one R₁ group.

6. The electrochemical mirror according to claim 3, wherein the Structural Formula 1 comprises an ether group in at least one among a ring and the R₁ group.

7. The electrochemical mirror according to claim 2, wherein the sulfonate compound has the linear form which is represented by a Structural Formula 2:

8. The electrochemical mirror according to claim 7, wherein, in the one of the alkyl group, the alkene group, or the alkyne group, one of hydrogen atoms is substituted with the sulfonate compound, respectively.

9. The electrochemical mirror according to claim 7, wherein at least one among the R₂ group and the R₃ group of the Structural Formula 2 comprises an ether group.

10. The electrochemical mirror according to claim 9, wherein the electrolyte solution comprises at least one material selected from an ammonium bromide-based material comprising tetra-n-butylammonium bromide (TBABr) or tetra-ethylammonium bromide (TEABr), a halogenated material comprising a halogenated anion and forming an organic or inorganic ionic salt with the halogenated anion, and tetra-n-butylammonium perchlorate (TBAP).

11. The electrochemical mirror according to claim 9, wherein the electrolyte solution comprises at least one solvent selected from water, dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), acetonitrile (AN), ethylene glycol (EG), γ

-butyrolactone (GBL), dimethy formamide (DMF), a glyme-based solvent, an ether-based solvent, and a carbonate-based solvent including a linear carbonate-based solvent or a cyclic carbonate-based solvent.

12. The electrochemical mirror according to claim 9 wherein the electrolyte solution comprises at least one selected from polyvinyl butyral (PVB), cyano resin, polyvinylidene fluoride (PVDF), and polyvinylidene-hexafluoropropylene (PVDF-HFP), to improve viscosity and stability of the electrolyte solution.

13. The electrochemical mirror according to claim 1, wherein the sulfonate compound comprises a sulfonate compound in which multiple bonds are formed between carbon molecules.

14. The electrochemical mirror according to claim 1, wherein the electrolyte solution comprises electrodepositable metal salt ions.

15. The electrochemical mirror according to claim 14, wherein the electrodepositable metal salt ions comprise at least one selected from silver (Ag), gold (Au), magnesium (Mg), nickel (Ni), bismuth (Bi), chromium (Cr), aluminum (Al) copper (Cu), calcium (Ca), and strontium (Sr).

16. The electrochemical mirror according to claim 14, wherein, when a voltage is applied to the first transparent electrode and the second transparent electrode, the electrodepositable metal salt ions are reduced to form an electrochemical mirror layer on a surface of one among the first transparent electrode and the second transparent electrode.

17. The electrochemical mirror according to claim 1, wherein the first transparent electrode and the second transparent electrode are formed on at least one among a glass substrate, a rigid substrate, a polyethylene terephthalate (PET) substrate, and a flexible substrate.

18. An electrochemical mirror comprising:

a first transparent electrode disposed on a first substrate;

a second transparent electrode which is disposed on a second substrate and faces the first transparent electrode;

a first blocking wall and a second blocking wall which connect ends of the first transparent electrode and the second transparent electrode; and

an electrolyte layer disposed in a cavity formed between the first transparent electrode, the second transparent electrode, the first blocking wall, and the second blocking wall, the electrolyte layer comprising an electrolyte solution including electrodepositable metal salt ions and a sulfonate compound,

wherein, in response to a voltage being applied to the first transparent electrode and the second transparent electrode, the electrodepositable metal salt ions form an electrochemical mirror layer on a surface of the first transparent electrode and cause the electrochemical mirror to operate in an opaque state,

in response to stopping application of the voltage to the first transparent electrode and the second transparent electrode, the electrodepositable metal salt ions become dissociated from the surface of the first transparent electrode and cause the electrochemical mirror to operate in a transparent state, and

the sulfonate compound serves as a catalyst controlling a switching speed between the opaque state and the transparent state, of the electrochemical mirror.

19. The electrochemical mirror according to claim 18, wherein the sulfonate compound has a cyclic form which is represented by a Structural Formula 1:

20. The electrochemical mirror according to claim 19, wherein, in the one of the alkyl group, the alkene group, or the alkyne group, one of hydrogen atoms is substituted with the sulfonate compound, respectively.