Solid-state electrochromic device with proton-conducting polymer electrolyte and Prussian blue counterelectrode

• US 5,215,821 A
• Filed: 12/26/1990
• Issued: 06/01/1993
• Est. Priority Date: 12/26/1990
• Status: Expired due to Fees

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: PPG Industries Incorporated (Nouryon BV)
• Inventors: Ho, Kuo-Chuan
• Primary Examiner(s): Robinson, Ellis P.
• Assistant Examiner(s): Speer, Timothy M.
• Application Number:
  US07/633,895
• Time in Patent Office: 888 Days
• Field of Search: 428/432, 428/688, 428/689, 428/697, 359/268, 359/269, 359/275
• US Class Current: 428/432
• CPC Class Codes: C09K 9/00 Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte
• CPC Class Codes: G02F 2001/1502 complementary cell
• CPC Class Codes: G02F 2001/1517 Cyano complex compounds, e.g. Prussian blue
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A solid-state electrochromic device is disclosed comprising tungsten oxide-Prussian blue complementary configuration in combination with a proton-conducting polymer electrolyte.

Claims

1. An article having variable transmittance in response to an electric field comprising:

a. a transparent substrate;

b. a transparent electroconductive electrode material;

c. a transparent cathodic coloring electrochromic material;

d. a transparent proton-conducting polymer electrolyte;

e. a transparent complementary electrochromic material comprising prussian blue; and

f. a transparent electroconductive counterelectrode material.

2. An article according to claim 1, wherein the electroconductive material is selected from the group consisting of metal oxide films.

3. An article according to claim 2, wherein the electroconductive material is selected from the group consisting of tin oxide, indium oxide and mixtures thereof.

4. An article according to claim 1, wherein the transparent electrochromic material is selected from the group consisting of tungsten oxide and molybdenum oxide.

5. An article according to claim 4, wherein the transparent electrochromic material is tungsten oxide.

6. An article according to claim 1, wherein the transparent substrate is glass.

7. An article according to claim 1, wherein the polymer electrolyte is selected from the group consisting of poly(2-acrylamido-2-methylpropane sulfonic acid), poly(styrene-sulfonic acid), polyvinyl sulfonic acid, and fluorinated copolymers.

8. An article according to claim 7, wherein the polymer electrolyte is poly(2-acrylamido-2-methylpropane sulfonic acid).