Electrochemical cell with emission controlled by electrodeposition of copper

• US 7,736,813 B2
• Filed: 12/19/2005
• Issued: 06/15/2010
• Est. Priority Date: 12/21/2004
• Status: Active Grant

• Current Assignee: European Aeronautic Defence and Space Company EADS France (Airbus SE)
• Original Assignee: European Aeronautic Defence and Space Company EADS France (Airbus SE)
• Inventors: Esmiller, Bruno, Badot, Jean-Claude, Viana, Bruno, Tarascon, Jean-Marie, Beluze, Lionel
• Primary Examiner(s): Yuan; Dah-Wei D
• Assistant Examiner(s): Barrow; Amanda
• Application Number:
  US11/793,865
• Publication Number:
  US 20080153007A1
• Time in Patent Office: 1,639 Days
• Field of Search: 359/265, 359/267, 359/269, 359/275
• US Class Current: 429/345
• 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 1/1533 structural features not otherwise provided for

Abstract

The invention concerns an electrochromic cell with emission controlled by electrodeposition under the action of a control voltage. The cell comprises the following flexible elements, superimposed and respectively in intimate contact:

• • a first electrode (11) intended to be connected to a first potential of the control voltage,
  • a first porous layer (12), formed of a mixture of PVDF-HFP, PEO and an activated carbon powder,
  • a porous separator (13), formed of a mixture of PVDF-HFP and PEO,
  • a second electrode (14) formed of a grid and connected to a second potential of the control voltage,
  • a second porous layer (15), formed of a mixture of PVDF-HFP, PEO and carbon powder,
    an aqueous electrolytic solution containing a copper salt being contained in the first flexible layer (12), in the separator (13) and in the second flexible layer (15).

Claims

1. Electrochromic cell with absorption and emission of light controlled by electrodeposition under the action of a control voltage, comprising the following flexible elements, superimposed and respectively in intimate contact:

a first electrode intended to be connected to a first potential of the control voltage,

a first porous layer, formed of a mixture of polyvinylidene difluoride hexafluoropropylene (PVDF-HFP), polyethylene oxide (PEO) and an activated carbon powder,

a porous separator, formed of a mixture of PVDF-HFP and PEO,

a second electrode formed of a grid and connected to a second potential of the control voltage,

a second porous layer, formed of a mixture of PVDF-HFP, PEO and carbon powder,

an aqueous electrolytic solution containing a copper salt being contained in the first porous layer, in the separator and in the second porous layer.

2. Electrochemical cell according to claim 1, wherein the first electrode is formed of a metallic leaf or by a metallic grid.

3. Electrochemical cell according to claim 2, wherein the first electrode is formed of a stainless steel leaf.

4. Electrochemical cell according to claim 2, wherein the first electrode is formed of a copper grid.

5. Electrochemical cell according to claim 1, wherein the second electrode is a grid in copper or in stainless steel.

6. Electrochemical cell according to claim 1, wherein the copper salt of the electrolytic solution is copper sulphate.