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WO2006047588A2 - Anode flexible enduite d'une pate, pile comportant une anode enduite d'une pate et procede de fabrication de celles-ci - Google Patents

Anode flexible enduite d'une pate, pile comportant une anode enduite d'une pate et procede de fabrication de celles-ci Download PDF

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Publication number
WO2006047588A2
WO2006047588A2 PCT/US2005/038548 US2005038548W WO2006047588A2 WO 2006047588 A2 WO2006047588 A2 WO 2006047588A2 US 2005038548 W US2005038548 W US 2005038548W WO 2006047588 A2 WO2006047588 A2 WO 2006047588A2
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WO
WIPO (PCT)
Prior art keywords
anode
paste
zinc
pasted
current collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2005/038548
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English (en)
Other versions
WO2006047588A3 (fr
Inventor
David J. Manko
Ramesh C. Kainthla
Lawrence A. Tinker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rechargeable Battery Corp
Original Assignee
Rechargeable Battery Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rechargeable Battery Corp filed Critical Rechargeable Battery Corp
Publication of WO2006047588A2 publication Critical patent/WO2006047588A2/fr
Publication of WO2006047588A3 publication Critical patent/WO2006047588A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/28—Construction or manufacture
    • H01M10/286—Cells or batteries with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H01M4/745—Expanded metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This invention generally relates to electrochemical battery cells, with a negative electrode using metal in particulate form. More particularly the invention pertains to zinc electrodes in primary alkaline, secondary nickel/zinc, and secondary silver/zinc cells.
  • Small electrochemical cells are used by consumers to power a variety of devices including cameras, flashlights, toys, radios, timepieces, calculators, and other electronic devices.
  • Alkaline cells used in the consumer marketplace typically comprise a cylindrical cathode and a gelled anode inside the cylindrical cathode that includes zinc particles and an aqueous electrolyte absorbed by the gel dispensed on a current collector. Such a configuration is often referred to as a bobbin configuration or a bobbin cell.
  • Alkaline cells comprising gelled anodes can be manufactured at a low cost relative to other battery types, are widely available and provide a low-cost and convenient energy source for many applications. While having these and other advantages, alkaline cells comprising gelled anodes have disadvantages. For example, zinc from gelled anodes can easily migrate within the battery cell, and migration of zinc species to the cathode can decrease the active life of the cell. The energy output of the cell is also limited by the anode to cathode interfacial surface area, which in the bobbin configuration is less than the external surface area of the cylinder and determined by the zinc content and microporosity of the gel.
  • gelled anodes are typically formed within the cell during manufacture of the cell, rather than pre-manufactured and stored for future insertion in a cell, hi the latter case such anodes would likely have a relatively short shelf life. Pasted anodes can be mass-produced at a relatively low cost and stored for later inclusion in a manufactured cell.
  • U.S. patents 6,207,326 Kawakami, et al.); 5,888,666 (Kawakami); 5,837,402 (Araki, et al.); 5,728,482 (Kawakami, et al.); and U.S.
  • pasted zinc anode comprising zinc, zinc powder, and a binder rolled onto a current collector used in a secondary cell.
  • pasted zinc anodes as currently used in the art also have disadvantages.
  • Pasted anodes are typically manufactured in the discharged state with zinc in the form OfZn 2+ (such as in zinc oxide (ZnO)) rather than in the charged state (as Zn 0 ).
  • Cells with pasted anodes manufactured in the discharged state must be charged after cell assembly and before use; thus pasted anodes are limited to secondary cells.
  • Pasted anodes as currently known in the art are also rigid, which limits the configuration of the anode within the cell.
  • the invention seeks to provide a zinc anode that may be mass-produced prior to cell construction, that is appropriate for use in a primary cell, and that can be formed into various geometries in a cell, hi accordance with the invention, this object is accomplished in a flexible pasted zinc anode comprising (a) a flexible current collector, and (b) a paste comprising (i) zinc particles and (ii) at least one block copolymer binder, wherein said flexible current collector and said paste form a unit.
  • the invention also seeks to provide a primary cell with a higher discharge capacity than traditional gelled anodes.
  • this object is accomplished in a primary cell comprising (1) a flexible pasted zinc anode comprising (a) a flexible current collector, and (b) a paste comprising (i) zinc particles and (ii) at least one block copolymer binder, wherein said flexible current collector and said paste form a unit, (2) a cathode, and (3) a liquid electrolyte.
  • the invention also seeks to provide a method of manufacturing cells and anodes as described above.
  • FIG. 1 is a diagrammatic view of a system for making an anode embodying the invention.
  • FIG. 2 is a diagrammatic view of a preferred system for making an anode embodying the invention.
  • FIG. 3 is a diagram of one configuration of a primary cell comprising a flexible pasted anode and a cathode embodying the invention.
  • FIG. 4A-4D are diagrams of another configuration of a primary cell comprising a flexible pasted anode and a cathode embodying the invention.
  • FIG. 5 is a graph of the cell capacity versus cell voltage of three AA alkaline cells made according to the embodiment of the invention provided in Example 3.
  • Anode pastes according to the invention comprise zinc particles and at least one block copolymer, optionally a gelling agent, and optionally zinc oxide.
  • Zinc particles according to the invention include zinc granules, fibers, powders, pellets, flakes, and other suitably small solid forms of zinc.
  • the size of zinc particles according to the invention may vary and may include a distribution of multiple sizes within a range.
  • the sizes of the zinc particles may include any of the distributions of zinc particles as used in gelled or other pasted zinc electrodes. Preferred average particle diameter of the zinc particle distribution is 100-160 ⁇ m, particularly 130-150 ⁇ m.
  • the zinc particles may also include additives including, but not limited to, bismuth, indium, aluminum, lead, and iron.
  • Block copolymer binders according to the invention may include any block copolymer that is compatible with zinc, the electrolyte solution, and other components of the cell and that also will maintain flexibility without cracking when bent. As such, the block copolymers preferably have elastomeric qualities.
  • Preferred elastomeric block copolymers include styrenic copolymers. Particularly preferred are styrene-ethylene/butylene-styrene (SEBS) copolymers, such as those manufactured by Kraton Polymers as KratonTM G series polymers, including Kraton G 1651 and G 1901.
  • a gelling agent may be added to increase the absorbency of the electrolyte by the anode.
  • common gelling agents include crosslinked acrylic acid carbomers (such as CarbopolTM 940), polyethylene oxide, polyacrylic acid, and various forms of cellulose.
  • Gelling agents according to the invention must be compatible with zinc, the electrolyte solution, the block copolymer, and other components of the anode and electrolyte solution during cell use.
  • Preferred gelling agents are crosslinked acrylic acid carbomers (such as CarbopolTM 940).
  • the anode paste according to the invention may also include zinc oxide.
  • Zinc oxide is a reaction product of zinc with hydroxide solutions, and is included in an anode paste and electrolyte solution to maintain an equilibrium of zinc oxide and potassium hydroxide in the cell to prevent zinc depletion through the formation of zinc oxide.
  • the preferred quantity of zinc oxide is less than 5 % of the dry weight of the anode paste, particularly preferably 0.5 to 2.5 % of the dry weight, most preferably about 0.5% by weight.
  • the preferred ratio of zinc metal (Zn 0 ) to zinc oxide (ZnO) is preferably from 35:1 to 220:1 by weight, most preferably about 190:1 to 220:1 by weight.
  • the anode paste at the time of application to the current collector may comprise at least one solvent.
  • the solvent may be used to obtain a paste-like consistency with the dry ingredients and may be used to lower the viscosity to ease application of the paste.
  • the solvent is selected to be compatible with the other paste components and to promote defect- free and uniform drying of the anode.
  • Organic solvents particularly petroleum distillates such as Stoddard solvent or other aliphatic or aromatic hydrocarbons may be used, and such solvents are readily available. Mixtures of different organic solvents may also be used.
  • Preferred solvents include Stoddard solvent and VM&P naphtha.
  • a typical paste at the time of application to a current collector comprises 75-80 % zinc (Zn 0 ) particles, 0-0.5% zinc oxide, 10-20 % solvent, 0.2-2.5 % block copolymer binders, and up to 5 % gelling agents.
  • the viscosity range of the paste at the time of application is preferably 25,000-45,000 cps.
  • Pasted zinc anodes according to the current invention comprise anode paste described herein and a flexible current collector.
  • Materials for current collectors for anodes according to the present invention may include any material that is electrochemically conductive, that is flexible, and that is not electrochemically reactive with zinc and reduces hydrogen gassing in an alkaline. Suitable materials may include tin plated steel, copper, or brass.
  • the current collector may be in a form suitable for applying a paste, including but not limited to screen or mesh, perforated metal, and expanded metal (such as that available under the trade name Exmet®). The paste may be applied to or "pasted" with the current collector to form a pasted zinc anode. Following the pasting process, the pasted zinc anode should form a unit that can be deformed without separation of the paste from the current collector.
  • Pasted zinc anodes according to the invention may be produced in batch, continuous, or semi-continuous processes.
  • One preferred process comprises combining dry paste ingredients including zinc particles, optionally zinc oxide particles, optionally one or more gelling agents, and optionally one or more auxiliaries to form a dry particulate mixture.
  • An elastomeric block copolymer and a solvent are combined to form a solution.
  • the solution may be heated to reach a desired viscosity, then the dry particulate mixture is added to the solution to form a zinc anode paste. Heating after addition of dry particles is alternatively attempted.
  • a particularly preferred process comprises combining zinc powder and up to 2.5% zinc oxide (based on the combined weight of the zinc powder and zinc oxide) to thoroughly distribute the zinc oxide in the zinc powder to form a dry zinc mixture, hi a separate container, SEBS block copolymer (about 2.5% by weight, based on the total weight of the polymer solution) and Stoddard solvent are combined and heated to 40-50°C to dissolve the polymer and form a polymer solution.
  • the dry zinc mixture and polymer solution is combined at a ratio of about 5 parts dry zinc mixture to 1 part polymer solution to form a viscous slurry/paste, and additional Stoddard solvent (about 0.25 parts) is added to reduce the viscosity and form a paste for application to the current collector.
  • the pasted strips may be cut into anodes and immediately fabricated into batteries. Alternately, the pasted strips may be cut into anode portions and stored for inclusion in cells to be manufactured at a later date. Prior to storage, the pasted anodes may be wrapped in a separator material, such as flexible nonwoven separator material made from a polyolefin, such as nonwovens (such as FS 2203) manufactured under the trade name Viledon® by Freudenberg Nonwovens, or other suitable separator materials, such as separators manufactured by Advanced Membrane Systems, Inc under the trade name FASTM, or the like. 3.
  • a separator material such as flexible nonwoven separator material made from a polyolefin, such as nonwovens (such as FS 2203) manufactured under the trade name Viledon® by Freudenberg Nonwovens, or other suitable separator materials, such as separators manufactured by Advanced Membrane Systems, Inc under the trade name FASTM, or the like.
  • FIG. 1 One process for manufacturing flexible zinc anode according to the invention is illustrated in FIG. 1.
  • zinc powder, zinc oxide, and gelling agent are proportionally weighed and fed to a blender, where they are thoroughly mixed.
  • Block copolymer binder (Kraton G-1654x) is weighed and fed into a tank of solvent naphtha (Shell-Sol 340 HT), where they are mixed until the binder dissolves in the solvent naphtha.
  • the weighed blended solids are then delivered to the binder/solvent in either the initial mixing tank or a second mixing tank.
  • the weighed blended solids are mixed with the binder/solvent to form a paste or slurry.
  • the paste or slurry is heated to an appropriate temperature, such as 50-60° C. to achieve a desired viscosity.
  • the process may proceed by mixing batches of the components or by providing a continuous raw ingredient feed mix.
  • the resultant paste is deposited to a current collector, preferably by delivering the paste at a constant volumetric flow rate to a coating or extruding device including coating dies, roll coaters, and doctor blades.
  • the current collector is preferably a continuous roll of perforated brass foil.
  • the thickness of the coated sheet anode web may be adjusted using settings on the coating device or by using shims on the device. After deposition of the paste, the thickness of the anode may be further adjusted by calendaring, a doctor blade, or other suitable apparatus.
  • the preferred thickness of the pasted sheet anode is 0.5 mm to 2.5 mm, with the paste evenly distributed on each side of the current collector.
  • solvent is driven from the sheet anode.
  • Methods for removal of solvent include but are not limited to passive air drying, forced air ovens, and infrared ovens. After the solvent removal process, selected or residual amounts of solvent may remain in the sheet anode. After solvent removal, the thickness of the pasted anodes is further adjusted by calendaring or other processes.
  • FIG. 2 A second process for manufacturing flexible zinc anode according to the invention is illustrated in FIG. 2. hi this process, zinc powder and zinc oxide are proportionally weighed and fed to a blender, where they are thoroughly mixed.
  • SEBS block copolymer binder (Kraton G-1654x) is weighed and fed into a tank of Stoddard solvent, where they are mixed and heated to 40-50°C until the binder dissolves in the solvent.
  • the weighed blended solids are then delivered to the binder/solvent in either the initial mixing tank or a second mixing tank.
  • the weighed blended solids are mixed with the binder/solvent, and additional solvent is optionally added, to form a paste or slurry.
  • the paste or slurry may be optionally heated or cooled to an appropriate temperature, to achieve a desired viscosity and handling temperature.
  • the process may proceed by mixing batches of the components or by providing a continuous raw ingredient feed mix.
  • FIG. 3 and FIG. 4 are top views of primary cells comprising a flexible pasted anode (64) formed or folded in a primary cell (60).
  • Other exemplary anode configurations within a primary cell are provided in U.S. Publication No. 2005/015397, which is herein incorporated by reference.
  • Cells Primary cells according to the present invention comprise pasted zinc anodes as described herein, a cathode, and an electrolyte.
  • Suitable cathodes for a primary alkaline cell include various conventional types.
  • Aqueous potassium hydroxide is the preferred electrolyte, although other known electrolytes may be used.
  • the following reaction occurs at the anode:
  • Cells according to the present invention may include, rigid, flexible, or deposited (filled) cathodes.
  • the anode (64) is a thin structure in a coiled configuration.
  • the cell comprises a flexible anode (64) that is encapsulated by a separator (66),
  • the cathode (62) may be formed from, for example, manganese dioxide, a conductive paste, and an additive comprising one or more of a binder, electrolye, and recombination catalyst.
  • the separator (66) comprises a laminated or composite material typically used as a separator material.
  • the separator (66) comprises a combination of an absorbent fibrous sheet material wettable by an electrolyte and an insulating material that is impermeable to small particles while being permeable to ions.
  • the absorbent material is preferably a macro-porous structure, such as a non-woven polyolefin. Shorting is prevented by the insulating material, which may comprise one or more layers of a micro-porous or non-porous material laminated to or coated onto the absorbent fibrous sheet material.
  • the insulating material may comprise one or more cellophane membranes laminated onto a non-woven polyolefin sheet.
  • an insulating material is one or more coatings of regenerated cellulose or viscose coated onto and partially impregnating the non-woven polyolefin sheet, resulting in a composite material.
  • Another suitable coating comprises a polymeric material such as sulfonated polyphenylene oxide and its derivatives.
  • One or more layers of the laminated or composite material are preferably wound or coiled to form a spiral- like or coiled structure as shown.
  • the electrode assembly comprises an S-shaped flexible pasted anode (100) and elongated masses of cathode material (106) inserted in the more open gaps of the folded inner anode, surrounded by the outer cathode (102).
  • the flexible pasted anode (100) may be grasped with a mandrel and rotated into a desired form, such as the S-shaped form.
  • the flexible pasted anode (100) can be rotated against an external point of contact or down through a funnel shaped orifice.
  • elongated masses of inner cathode material (106) can be inserted into the more open gaps (see FIG. 4A) and the folded inner anode (100) and elongated masses of the inner cathode material (106) compressed (see FIG. 4B) into a single electrode subassembly (108) and then placed within the ring of the outer cathode material (102) and within the cell container (104) (see FIG. 4C).
  • the folded inner anode (100) can be placed inside the ring of the outer cathode material (102) in the cell container (104) and the inner portion of the cathode material (106) is then introduced into the void spaces via injection through the hollow mandrel or through some other nozzle placed in the void space and withdrawn as the cathode material fills in.
  • Zinc oxide 3.00% Carboxyinethylcellulose (CMC) 1.00% Carbomer 0.50%
  • PTFE polytetrafluoroethylene
  • the mixture paste was poured onto the tin-coated substrate and covered with another sheet of PTFE to form a "sandwich.”
  • the mixture paste was spread over the substrate on the one side of the sandwich with a rolling pin, and the sandwich was flipped, material was added to the other side of the tin substrate and rolled with a rolling pin.
  • the sandwich was covered with 0.040 inch shims and passed through a roll mill twice, rotating the sandwich each time.
  • the PTFE sheets were removed and excess paste was removed from the edges of the substrate.
  • the pasted substrate was dried on a screen overnight.
  • the pasted substrate was then cut into four electrodes, each with a paste weight of approximately 4.6 to 4.7 grams and a thickness of approximately 0.040 inch.
  • Carboxymethylcellulose (CMC) 1.5% I g
  • An aliquot of 50.91 grams of the base solvent mixture was removed and added to a clean container, and the zinc mixture was added to the solvent mixture and stirred to combine.
  • An additional 12.45 grams of Stoddard solvent was added to the mixture, forming a paste. The paste was then cooled to approximately 35°C.
  • a vertical coating die was set up so that a perforated metal strip current collector substrate could be pulled through the die.
  • the die opening was set to approximately 0.075 inches.
  • the die was then heated to maintain a temperature of approximately 30°C.
  • the coating die was then filled with the paste.
  • the substrate was pulled through the die to coat the paste onto each side of the current collector substrate.
  • the pasted strip was cut into electrodes that were 31 mm by 41 mm.
  • the electrodes had a non-coated strip approximately 2 mm wide at one end of the electrode.
  • the electrodes were then wrapped with two layers of a flexible separator material with the inner layer made from a nonwoven polyolefin material and the outer layer made from a microporous membrane material.
  • a 1.5 W pulse is applied to the cell for 2.0 seconds.
  • Steps 1 and 2 are repeated ten times.
  • Steps 1-4 are repeated until the cell voltage reaches a cutoff of 1.05 V.
  • Results from the testing of these cells are shown in FIG. 5, and indicate that the electrodes as manufactured using this process are suitable for use in alkaline cells.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne une anode flexible enduite comprenant un collecteur de courant flexible, une pâte incluant des particules de zinc et au moins un liant de copolymère séquencé, ledit collecteur de courant et ladite pâte formant une unité. L'invention concerne aussi une pile comprenant l'anode flexible enduite, une cathode et un électrolyte. Elle concerne également une pâte d'anode comprenant des particules de zinc et au moins un copolymère séquencé, ladite pâte pouvant être utilisée dans une anode. L'invention concerne de plus un procédé de fabrication d'une anode de zinc qui comporte les étapes consistant à combiner de la poudre de zinc, un copolymère séquencé et un solvant afin de former une pâte, à déposer la pâte sur un collecteur de courant, et à sécher l'anode enduite humide; et un procédé de fabrication d'une pile, qui comporte les étapes consistant à façonner une anode de zinc flexible enduite en vue de former une anode de zinc enduite enroulée, à introduire l'anode de zinc enduite enroulée dans un contenant à pile, et à remplir d'un électrolyte ledit contenant.
PCT/US2005/038548 2004-10-25 2005-10-25 Anode flexible enduite d'une pate, pile comportant une anode enduite d'une pate et procede de fabrication de celles-ci Ceased WO2006047588A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62208504P 2004-10-25 2004-10-25
US60/622,085 2004-10-25

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WO2006047588A2 true WO2006047588A2 (fr) 2006-05-04
WO2006047588A3 WO2006047588A3 (fr) 2006-08-24

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2012116799A3 (fr) * 2011-03-01 2012-11-15 Ika - Werke Gmbh & Co. Kg Procédé et dispositif de production d'un mélange pour recouvrir des électrodes de batterie
WO2016178187A1 (fr) * 2015-05-06 2016-11-10 Suren Martirosyan Formation et formatage d'électrode de zinc
CN108854641A (zh) * 2018-07-02 2018-11-23 东华工程科技股份有限公司 一种超轻细料连续制浆设备及制浆方法
JP2024505375A (ja) * 2021-11-09 2024-02-06 エルジー エナジー ソリューション リミテッド 電極スラリー提供装置、コーティング装置及びダイコーター

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US3918989A (en) * 1971-01-18 1975-11-11 Gates Rubber Co Flexible electrode plate
US7288126B2 (en) * 2003-09-02 2007-10-30 Rechargeable Battery Corporation Battery cells having improved power characteristics and methods of manufacturing same
US7264903B2 (en) * 2003-09-02 2007-09-04 Rechargeable Battery Corporation Battery cells having improved power characteristics and methods of manufacturing same

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WO2012116799A3 (fr) * 2011-03-01 2012-11-15 Ika - Werke Gmbh & Co. Kg Procédé et dispositif de production d'un mélange pour recouvrir des électrodes de batterie
CN103430355A (zh) * 2011-03-01 2013-12-04 艾卡工厂有限及两合公司 制备用于涂覆电池电极的混合物的方法及装置
JP2014509057A (ja) * 2011-03-01 2014-04-10 イカーヴェルケ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト バッテリの電極をコーティングする混合物を製造する方法及び装置
WO2016178187A1 (fr) * 2015-05-06 2016-11-10 Suren Martirosyan Formation et formatage d'électrode de zinc
CN108854641A (zh) * 2018-07-02 2018-11-23 东华工程科技股份有限公司 一种超轻细料连续制浆设备及制浆方法
CN108854641B (zh) * 2018-07-02 2021-09-07 东华工程科技股份有限公司 一种超轻细料连续制浆设备及制浆方法
JP2024505375A (ja) * 2021-11-09 2024-02-06 エルジー エナジー ソリューション リミテッド 電極スラリー提供装置、コーティング装置及びダイコーター
JP7652511B2 (ja) 2021-11-09 2025-03-27 エルジー エナジー ソリューション リミテッド 電極スラリー提供装置、コーティング装置及びダイコーター

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