THIN FLEXIBLE ELECTROCHEMICAL ENERGY CELL

• US 20130089769A1
• Filed: 04/28/2011
• Published: 04/11/2013
• Est. Priority Date: 04/28/2010
• Status: Abandoned Application

• Current Assignee: FlexEl, LLC
• Original Assignee: FlexEl, LLC
• Inventors: Peckerar, Martin C., Dilli, Zeynep, Lowy, Daniel, Dornajafi, Mahsa, Proctor, Robert Benjamin
• Application Number:
  US13/642,236
• Publication Number:
  US 20130089769A1
• Time in Patent Office: Days
• US Class Current: 429/127
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: H01G 11/28 arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
• CPC Class Codes: H01G 11/32 Carbon-based
• CPC Class Codes: H01G 11/42 Powders or particles, e.g. composition thereof
• CPC Class Codes: H01G 11/46 Metal oxides
• CPC Class Codes: H01M 10/36 Accumulators not provided for in groups H01M10/05-H01M10/34
• CPC Class Codes: H01M 4/48 of inorganic oxides or hydroxides
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

An electrochemical energy cell has a galvanic cell including an anode electrode unit, a cathode electrode unit, an electrolyte body between the anode and cathode electrode units and contacting both the anode and cathode electrode units, and a separator layer including the electrolyte body and placed within the cell to contact both the anode and cathode electrode units to bring the anode and cathode electrode units in contact with the electrolyte body. The cathode electrode unit includes a cathode material including a powder mixture of a powder of hydrated ruthenium oxide and one or more additives. The anode electrode unit includes a structure formed of an oxidizable metal, and the separator layer includes a material that is porous to ions in liquid and is electrically non-conductive. A flexible electrochemical cell can be configured for a reduction-oxidation reaction to generate power at a surface of the electrode unit(s).

Claims

1. A battery, formed of an electrochemical energy cell, comprising:

at least one galvanic cell including;

an anode electrode unit;

a cathode electrode unit;

an electrolyte body between the anode and cathode electrode units and contacting both the anode and cathode electrode units; and

a separator layer including the electrolyte body and placed within the cell to contact both the anode and cathode electrode units to bring the anode and cathode electrode units in contact with the electrolyte body,

wherein the electrochemical energy cell is configured to operate as a battery through electrochemical energy generation and galvanic action,

wherein the cathode electrode unit includes a cathode material comprising a powder mixture of a powder of hydrated ruthenium oxide and one or more additives,

wherein the anode electrode unit includes a structure formed of an oxidizable metal,

wherein the separator layer comprises a material that is porous to ions in liquid and is electrically non-conductive, and

wherein the electrolyte body comprises a liquid solution or a gel that is configured to permit a movement of ions between the anode electrode unit and the cathode electrode unit, accept the ions for the battery from the anode electrode unit, and supply the ions to the cathode electrode unit.

2. The battery of claim 1, wherein a size of a surface area of the cell is larger than a size of a footprint of the cell, and wherein the anode electrode unit is configured to increase a conductivity level of the cell and increase a surface area of the electrolyte body.

3. The battery of claim 1, wherein the additives comprises activated carbon and at least one other additive.

5. The battery of claim 1, further comprising a cathode current collector structure, wherein the cathode material is suspended in the electrolyte body and spread over the cathode current collector structure.

6. The battery of claim 1, wherein the cathode electrode unit comprises a coating of the cathode material on an electrically conductive, chemically inert material that serves as a cathode current collector.

12. The battery of claim 1, wherein the cathode material has an effective surface area over which reactions that constitute the battery operation occur, wherein the effective surface area of the cathode material affects a level of a performance of the battery, wherein the effective surface area is larger than a footprint area of the cell, wherein the effective surface area is achieved by the use of ruthenium oxide particles compounded with activated carbon particles distributed over a surface of a cathode current collector by means of coating or other techniques, such that a surface area presented to the electrolyte body by the ruthenium oxide particles distributed between and over activated carbon particles is larger than the footprint area of the cell.

13. The battery of claim 1, wherein the battery comprises a folded design structure or has the cathode electrode unit or the anode electrode unit substantially positioned within a pocket structure of the battery.

14. The battery of claim 1, wherein the cathode material has a surface area that affects a level of a performance of the battery, and wherein a size of the surface area is determined as a function of at least one of the following:

material properties of the cathode material, a porosity of hydrated ruthenium oxide particles, a porosity of activated carbon particles, sizes of the hydrated ruthenium oxide and activated carbon particles, or a mixing method involving placing the cell in a sonic bath, and wherein the surface area is greater than a footprint area of the battery.

21. The battery of claim 1, wherein the additives comprises one or more of agar, sucrose, sorbitol, platinum, palladium, iridium oxide, indium oxide, magnetite, Nafion™

, metal-functionalized carbon nanotubes, nickel-plated carbon nanotubes, titanium dioxide, tungsten carbide, sodium chloride, and polyethylene glycols.

23. The battery of claim 1, wherein the structure for the anode electrode unit is formed in a form of a layer, a sheet, a foil or a mesh, wherein the oxidizable metal comprises at least one of zinc, aluminum, tin or lead.

28. The battery of claim 1, wherein the electrolyte body is configured to increase a level of a capacity of the cell by having a property that affects a rate of electron acceptance from an external circuit by having the cathode material of at least the powder of hydrated ruthenium oxide in the cell.

32. The battery of claim 1, wherein the electrolyte body comprises a gel form, wherein the gel form comprises gelling agents.

33. The battery of claim 32, wherein the gelling agents comprises at least one of agar or carboxymethyl cellulose.

4. (canceled)

7-11. -11. (canceled)

15-16. -16. (canceled)

18-20. -20. (canceled)

22. (canceled)

24-27. -27. (canceled)

29-31. -31. (canceled)

34. A device comprising an electrochemical cell and configured to operate as a battery, the electrochemical cell comprising:

an anode electrode unit;

a cathode electrode unit; and

a first electrolyte body sandwiched between the anode and the electrode units,

wherein the cathode electrode unit includes a cathode material having at least a powder mixture of a powder of ruthenium oxide with activated carbon (AC) particles suspended in a second electrolyte body,

wherein the electrochemical cell is bendable and twistable to form a non-planar shape,

wherein the electrochemical cell is configured for a reduction-oxidation (redox) reaction to generate power at a surface of one or both of the electrode units, and

wherein the first electrolyte body comprises a liquid solution or a gel that is configured to permit a movement of ions between the anode electrode unit and the cathode electrode unit, accept the ions for the battery from the anode electrode unit, and supply the ions to the cathode electrode unit.

35. A method of fabricating a flexible electrochemical cell configured to operate as a battery, the method comprising:

forming a backing layer of predetermined dimensions;

identifying a predetermined active area on a surface of the backing layer;

mixing a powder mixture from a powder of hydrated ruthenium oxide and a powder of activated carbon;

preparing a paste from the powder mixture and an electrolyte;

depositing the paste on the active area on the backing layer;

applying the paste into the backing layer, thereby forming a cathode electrode unit, wherein the backing layer serves as a current collector;

forming a metal anode electrode unit;

forming a separator layer of predetermined dimensions from a permeable electrically insulating material;

positioning the separator layer on the cathode electrode unit contiguous to the paste dispersed on the active area;

impregnating the separator layer with the electrolyte; and

attaching the metal anode electrode unit to the cathode electrode unit with the separator layer sandwiched therebetween,

wherein the electrolyte comprises a liquid solution or a gel that is configured to permit a movement of ions between the anode electrode unit and the cathode electrode unit, accept the ions for the battery from the anode electrode unit, and supply the ions to the cathode electrode unit.

36. The method of claim 35, wherein the forming of the backing layer comprises forming the backing layer of predetermined dimensions from a flexible metal, mylar, plastic mesh or foil coated with an electrically conductive, chemically isolating polymer comprising polyaniline or polypyrrole.

37. The method of claim 36, wherein applying the paste comprises applying the paste into the active area on the backing foil, thereby forming the cathode electrode unit.

38. The method of claim 35, wherein the forming the backing layer comprises forming the backing layer of predetermined dimensions from a flexible graphite mesh or carbon cloth.

39. The method of claim 38, wherein the metal anode electrode unit is formed from a flexible sheet or foil of an oxidizable metal or the metal anode electrode unit is formed from a flexible mesh of an oxidizable metal.

40-46. -46. (canceled)