Composition for electrochromic device having optical transmission, high flexibility, and high moisture resistance, and manufacturing method of electrochromic member

Patent metadata

Field	Value
Publication number	US-12422723-B2
Application number	US-202118020433-A
Country	US
Kind code	B2
Filing date	Dec 8, 2021
Priority date	Oct 14, 2021
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

The present invention relates to a composition for an electrochromic device having improved optical transmission and elasticity, and a manufacturing method of an electrochromic member, wherein the composition for an electrochromic device according to an embodiment of the present invention includes a light-transmitting polymer resin, a plasticizer, and an electrochromic material.

First claim

The invention claimed is:

1. A composition for an electrochromic device comprising:
a light-transmitting polymer resin;
a plasticizer; and
an electrochromic material,
wherein the electrochromic material is selected from a group consisting of diheptyl viologen dihexafluorophosphate and ethyl viologen dibis(trifluoromethanesulfonyl)imide, wherein,
when the electrochromic material is diheptyl viologen dihexafluorophosphate, the electrochromic material is contained in an amount of 14 to 17 parts by weight per 100 parts by weight of the light-transmitting polymer resin, and
when the electrochromic material is ethyl viologen dibis(trifluoromethanesulfonyl)imide, the electrochromic material is contained in an amount of 11 to 14 parts by weight per 100 parts by weight of the light-transmitting polymer resin.

2. The composition for an electrochromic device of claim 1 , wherein the electrochromic material is the diheptyl viologen dihexafluorophosphate, and is represented by Formula 1 below:

3. The composition for an electrochromic device of claim 1 , wherein the electrochromic material is the ethyl viologen dibis(trifluoromethanesulfonyl)imide, and is represented by Formula 2 below:

4. The composition for an electrochromic device of claim 1 , further comprising an ionic liquid in an amount of 100 to 200 parts by weight with respect to 100 parts by weight of the polymer resin.

5. The composition for an electrochromic device of claim 1 , further comprising an anode redox compound in an amount of 1 to 7 parts by weight with respect to 100 parts by weight of the polymer resin.

6. An electrochromic device comprising:
a first electrode;
a second electrode; and
an electrochromic device layer discolored by voltage applied to the first electrode and the second electrode;
wherein the electrochromic device layer includes the composition for an electrochromic device of claim 1 .

7. A method of manufacturing an electrochromic member, the method comprising:
dissolving a polymer resin, a plasticizer, an ionic liquid, and an electrochromic material in a solvent to prepare a mixed solution; and
removing the solvent of the mixed solution,
wherein the electrochromic material is selected from the group consisting of diheptyl viologen dihexafluorophosphate and ethyl viologen dibis(trifluoromethanesulfonyl)imide, wherein,
when the electrochromic material is diheptyl viologen dihexafluorophosphate, the electrochromic material is contained in an amount of 14 to 17 parts by weight per 100 parts by weight of the polymer resin, and
when the electrochromic material is ethyl viologen dibis(trifluoromethanesulfonyl)imide, the electrochromic material is contained in an amount of 11 to 14 parts by weight per 100 parts by weight of the polymer resin.

8. The method of claim 7 , wherein the electrochromic material is diheptyl viologen dihexafluorophosphate, and is prepared through the following manufacturing method:
preparing a solution in which 1,1-diheptyl-4,4-bipyridinium dibromide is dissolved in a solvent; and
adding NH 4 PF 6 to the solution.

9. The method of claim 7 , wherein the electrochromic material is ethyl viologen dibis(trifluoromethanesulfonyl)imide, and is prepared through the following manufacturing method:
preparing a solution in which ethyl viologen dibromide is dissolved in a solvent; and
adding lithium bis(trifluoromethanesulfonyl)imide to the solution.

10. The method of claim 7 , wherein in the preparing of the mixed solution,
the plasticizer is in an amount of 700 to 1200 parts by weight with respect to 100 parts by weight of the polymer resin,
the ionic liquid is in an amount of 100 to 200 parts by weight.

11. The method of claim 7 , wherein in the preparing of the mixed solution,
an anode redox compound is further added in an amount of 1 to 7 parts by weight with respect to 100 parts by weight of the polymer resin.

Assignees

• Univ Korea Ind Univ Coop Found

Inventors

• Bae Jin Woo
• Oh Seung Ju

Classifications

• G02F1/163

  Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor · CPC title

• C09K2211/1044

  containing two nitrogen atoms as heteroatoms · CPC title

• C09K9/02

  Organic tenebrescent materials · CPC title

• C08K5/11

  of acyclic polycarboxylic acids · CPC title

• G02F2001/1518

  Ferrocene compounds · CPC title