WO2021198853A1 - Anode métallique pour batteries au lithium-ion - Google Patents

Anode métallique pour batteries au lithium-ion Download PDF

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Publication number
WO2021198853A1
WO2021198853A1 PCT/IB2021/052426 IB2021052426W WO2021198853A1 WO 2021198853 A1 WO2021198853 A1 WO 2021198853A1 IB 2021052426 W IB2021052426 W IB 2021052426W WO 2021198853 A1 WO2021198853 A1 WO 2021198853A1
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Prior art keywords
metal
anode
composite coating
lithium
present disclosure
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PCT/IB2021/052426
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English (en)
Inventor
Gopinath SH
Pramila Rao NILESHWAR
Samraj Jabez Dhinagar
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Tvs Motor Company Limited
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Priority to CN202180014416.7A priority Critical patent/CN115088106A/zh
Priority to EP21718653.5A priority patent/EP4128397A1/fr
Publication of WO2021198853A1 publication Critical patent/WO2021198853A1/fr

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    • H—ELECTRICITY
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    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
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    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0409—Methods of deposition of the material by a doctor blade method, slip-casting or roller coating
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    • H01M4/04—Processes of manufacture in general
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    • H01M4/0416—Methods of deposition of the material involving impregnation with a solution, dispersion, paste or dry powder
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    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
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    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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    • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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    • 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
    • H01M4/381—Alkaline or alkaline earth metals elements
    • H01M4/382—Lithium
    • H—ELECTRICITY
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    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
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    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
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    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
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    • H01M50/431—Inorganic material
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    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
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    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • 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

  • the present disclosure generally relates to the field of lithium ion batteries, and in particular to anode for lithium ion batteries.
  • Lithium ion batteries are very popular in the power technology due its exclusive advantages over other technologies. These lithium ion rechargeable batteries have high energy density and are also lighter in weight. In addition, lithium ion rechargeable batteries can deliver large amounts of current for high-power applications, approximately three times higher than other type of batteries. Lithium ion batteries have profound applications in many areas such as portable electronics, for electric vehicles and aerospace power applications. However, Lithium-ion batteries are subjected to various technical improvements in-order to overcome few of its shortcomings. They have the tendency to overheat, thermal run away, loss of capacity and high cost of fabrication. Current research efforts focus on the lithium-ion batteries with respect to electrode modification, electrolyte usage, separator construction in order to attain an improved performance.
  • a method of fabricating the metal anode comprising: a) obtaining metal precursors; b) milling metal precursors to obtain the porous mixed metal oxide; c) incorporating the carbon nanotube to the porous mixed metal oxide in the presence of a binder to obtain composite coating; and d) encapsulating lithium metal- copper -lithium metal with the composite coating.
  • a battery comprising: (a) a cathode, (b) the metal anode comprising: (i) a copper current collector (106) ; (ii) a lithium metal layer (104) disposed above the copper current collector (106); and (iii) a composite coating (102) disposed on the lithium metal layer (104); and (c) an electrolyte.
  • Figure 1 depicts the pictorial representation of the fabricated metal anode, in accordance with an implementation of the present subject matter.
  • Figure 2 depicts the pictorial representation of the lithium cell construction comprising the fabricated metal anode, in accordance with an implementation of the present subject matter.
  • Figure 3 depicts the pictorial representation of the lithium pouch cell construction comprising the fabricated metal anode, in accordance with an implementation of the present subject matter. DESCRIPTION OF THE INVENTION
  • Ratios, concentrations, amounts, and other numerical data may be presented herein in a range format. It is to be understood that such range format is used merely for convenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited.
  • a temperature range of about 20 °C to 70 °C should be interpreted to include not only the explicitly recited limits of about 20 °C to about 70 °C, but also to include sub-ranges, such as 22 °C to 45 °C to 70 °C, and so forth, as well as individual amounts, including fractional amounts, within the specified ranges, such as 20.5 °C, 41.1 °C, and 59.9 °C, for example.
  • the term ‘current collector’ refer to the metals used in fabrication of electrode.
  • copper is the current collector at the anode end and aluminium is the cathode current collector.
  • the movement of the lithium ions creates free electrons in the anode which creates a charge at the positive (anode) current collector.
  • the electrical current then flows from the current collector through a device being powered to the negative (cathode) current collector and thus the current collector enhances the electrochemical performance.
  • the term ‘disposed above’ refers to encapsulation.
  • the lithium metal is disposed above the copper current collector, which means the lithium metal encapsulates the copper current collector and forms Li-Cu-Li layer of the metal anode.
  • the term ‘disposed on’ refers to coating on one side.
  • the composite coating is disposed on the lithium metal, which means the composite coating is coated on one(outer) side of the lithium metal.
  • spray layer formation refers to the process of coating a material over the substrate by spraying the coating material on the surface of the substrate and further drying.
  • the composite coating was layered on the metallic surface by spray layer formation.
  • doctor blade coating refer to a technique to coat a thin layer of coating material over a surface using the instrument doctor blade. In the present disclosure, this technique was used for composite coating over metallic surface.
  • the term ‘separator’ refers to a polymeric material which can block the flow of electrons inside the battery.
  • the polymeric separator act as an electric insulator.
  • the term ‘electrolyte’ refers to a substance that when in contact with solvent becomes conductive.
  • the term ‘non-aqueous electrolyte solution’ refers to a solution of an electrolyte salt dissolved in an organic solvent that is capable of conducting ions.
  • the term ‘solid electrolyte’ refers to electrolytic material in solid state that possess high ionic conductivity.
  • the term ‘ inorganic solid electrolyte’ refers to an inorganic material that can act as an electrolyte.
  • the terms ‘non-aqueous electrolyte solution’, ‘solid electrolyte’, ‘inorganic solid electrolyte’ refers to all the electrolytic materials prevalently used in lithium ion batteries.
  • the present disclosure provides a metal anode comprising a copper current collector (106) , a lithium metal layer (104) disposed above the current collector; and, a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide (binary mixture of mixed metal oxide) and conductive carbon nanotubes.
  • a metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the current collector; and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and carbon nanotubes.
  • a metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the current collector; and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises the porous mixed metal oxide and the carbon nanotubes and wherein the lithium metal layer has a thickness in the range of 40 ⁇ m - 50 ⁇ m.
  • a metal anode comprising(a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the copper current collector (106); and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and carbon nanotubes and wherein the lithium metal layer has a thickness in the range of 45 ⁇ m - 50 ⁇ m.
  • a metal anode as described herein, wherein the lithium metal layer has a thickness of 50 ⁇ m.
  • a metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the current collector; and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and carbon nanotubes and wherein the composite coating has a thickness in the range of 5 ⁇ m - 20 ⁇ m. In another embodiment of the present disclosure, wherein the composite coating has a thickness in the range of 10 ⁇ m -20 ⁇ m. In yet another embodiment of the present disclosure, wherein the composite coating has a thickness in 20 ⁇ m.
  • a metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the current collector; and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and carbon nanotubes and wherein the composite coating comprises at least one binder.
  • a metal anode as described herein wherein the composite coating comprises at least one binder and is selected from the group consisting of polyvinylidene fluoride, carboxyl methyl cellulose (CMC), polyacrylic acid (PAA) and combinations thereof.
  • the binder is polyvinylidene fluoride.
  • a metal anode as described herein wherein the composite coating has a porosity in the range of 30-40 % by volume with respect to the composite coating
  • a metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) having thickness in the range of 40 ⁇ m - 50 ⁇ m disposed above the current collector; and (c) a composite coating having a thickness in the range of 5 ⁇ m - 20 ⁇ m comprising porous mixed metal oxide and carbon nanotube disposed on the lithium metal layer, wherein the composite coating comprises at least one binder selected from the group consisting of polyvinylidene fluoride, carboxyl methyl cellulose (CMC), polyacrylic acid (PAA) and combinations thereof, and wherein the composite coating has a porosity in the range of 30-40 % by volume with respect to the composite coating.
  • CMC carboxyl methyl cellulose
  • PAA polyacrylic acid
  • a method of fabricating the metal anode comprising: (a) a copper current collector (106); (b) a lithium metal layer (104) disposed above the current collector; and (c) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and a carbon nanotube, the method comprising (i) obtaining metal precursors; (ii) milling metal precursors to obtain a porous mixed metal oxide; (iii) incorporating the carbon nanotube to the porous mixed metal oxide in the presence of a binder to obtain a composite coating; and (iv) encapsulating lithium metal- copper -lithium metal with the composite coating.
  • the metal anode as described herein, wherein the metal precursors are selected from the group consisting of SiO 2 , SnF 2 and combinations thereof.
  • a method of fabricating the metal anode as described herein wherein milling the metal precursors is done at a temperature in the range of 20°C-70°C to obtain a porous mixed metal oxide.
  • milling the metal precursors is done at a temperature in the range of 20°C-60°C to obtain a porous mixed metal oxide.
  • milling the metal precursors is done at an initial temperature in the range of 20°C-30°C, final temperature in the range of 50°C-60°C to obtain a porous mixed metal oxide.
  • a method of fabricating the metal anode comprising (a) obtaining metal precursors selected from the group consisting of SiO 2 , SnF 2 and combinations thereof; (b) milling the metal precursors at a temperature in the range of 20°C-30°C to obtain a porous mixed metal oxide; (c) incorporating carbon nanotubes to the porous mixed metal oxide in the presence of the binder selected from polyvinylidene fluoride, carboxyl methyl cellulose (CMC), polyacrylic acid (PAA), and combinations thereof to obtain composite coating; and (d) encapsulating lithium metal- copper -lithium metal with the composite coating is carried out by a process selected from spray layer formation or doctor blade coating.
  • a method of fabricating the metal anode comprising (a) obtaining metal precursors selected from the group consisting of SiO 2 , SnF 2 and combinations thereof; (b) milling metal precursors at a temperature in the range of 20°C-30°C to obtain a porous mixed metal oxide; (c) incorporating a carbon nanotube to the porous mixed metal oxide in the presence of a binder polyvinylidene fluoride to obtain a composite coating; and (d) encapsulating lithium metal- copper -lithium metal with the composite coating is carried out by a process selected from spray layer formation or doctor blade coating.
  • a battery comprising (a) a cathode; (b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide and a carbon nanotube; and (c) an electrolyte.
  • a battery as described herein wherein the cathode and the metal anode are held apart by a porous separator.
  • a battery comprising (a) a cathode ;(b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer, wherein the cathode and the metal anode are held apart by a porous separator.
  • a battery comprising (a) a cathode; (b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer, wherein the separator prevents electrical contact between the cathode and the anode while allowing ion conduction between the cathode and the anode.
  • a battery comprising (a) a cathode; (b) the metal anode (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer and wherein the separator comprises material selected from polyethylene, polypropylene or ceramic coated polymeric membrane.
  • a battery comprising (a) a cathode ;(b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer, wherein the cathode and the metal anode are held apart by a porous separator selected from polyethylene, or polypropylene and wherein the separator prevents electrical contact between the cathode and the anode while allowing ion conduction between the cathode and the anode.
  • a porous separator selected from polyethylene, or polypropylene
  • a battery as described herein wherein the electrolyte is selected from the group consisting of a non- aqueous electrolytic solution, a solid electrolyte and an inorganic solid electrolyte.
  • the cathode is selected from the group consisting of LiCoO 2 , LiCo 0.99 Al 0.01 O 2 , LiNiO 2 , LiMnO 2 , LiCo 0.5 Ni 0.5 O 2 , LiCo 0.
  • a battery comprising (a) a cathode; (b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer; and (c) an electrolyte and wherein the cathode and the metal anode are held apart by a porous separator and wherein the separator prevents electrical contact between the cathode and the anode while allowing ion conduction between the cathode and the anode and wherein the separator comprises material selected from polyethylene, polypropylene or ceramic coated polymeric membrane and wherein the electrolyte is selected from the group consisting of a non-aqueous electrolytic solution, a solid electrolyte and an inorganic solid electrolyte and wherein the cathode is selected from the group consisting of
  • a battery comprising (a) a cathode ;(b) the metal anode comprising (i) a copper current collector (106); (ii) a lithium metal layer (104) disposed above the current collector; and (iii) a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises porous mixed metal oxide and carbon nanotube for use in electric vehicles and storage grid applications.
  • the shape of a lithium-ion battery can be cylindrical, square, button-like, etc.
  • the metal anode of the present disclosure comprised a copper current collector (106), a lithium metal layer (104) disposed above the current collector, and a composite coating (102) disposed on the lithium metal layer, wherein the composite coating comprises a porous mixed metal oxide (binary mixture of mixed metal oxide) and conductive carbon nanotube.
  • the composite coating may comprise at least one binder selected from polyvinylidene fluoride, carboxyl methyl cellulose (CMC), or polyacrylic acid (PAA).
  • the present disclosure addresses the issue of dendrite formation and regulates lithium deposition by employing a stable and dendrite preventing composite coating encapsulating the lithium metal.
  • the fabricated metal anode was used in the lithium ion battery construction which further comprised the lithium metal oxide as cathode and an electrolyte.
  • the composite coating of the present disclosure was prepared by following process.
  • the metal precursors used for the preparation were SiO 2 and SnF 2 .
  • SiO 2 was commercially purchased.
  • SnF 2 was obtained by evaporating a solution of SnO in 40% hydrogen fluoride.
  • the metal precursors SiO 2 and SnF 2 were taken in the weight ratio of 3:1, milled and the mixed metal oxide was obtained.
  • the precursors were milled continuously at an initial temperature in the range of 20 °C - 30 °C and the final temperature was in the range of 50 °C - 60 °C and the porous mixed metal oxide with a particle size of less than 1 micron was obtained.
  • the porosity of the mixed metal oxide was in the range of 30-45% by volume of the mixed metal oxide.
  • Carbon nanotubes were added to the porous mixed metal oxide in the weight range of 2 to 3% with respect to the mixed metal oxide.
  • the mixture containing mixed metal oxide and the carbon nanotubes were milled, followed by the addition of 5% of binder polyvinylidene difluoride (PVDF).
  • PVDF binder polyvinylidene difluoride
  • 50-60% by weight of solvent NMP N-Methyl-2-pyrrolidone
  • solvent NMP N-Methyl-2-pyrrolidone
  • the presence of the carbon nanotubes enhances the surface area and also contributes in conductivity enhancement. Accordingly, such commercially available carbon nanotubes were used in the present disclosure.
  • the porosity of the composite coating was found to be 30-40% by volume of the composite coating.
  • the thickness of lithium metal was in the range of 40-50 microns which was impregnated to the copper metal on both the sides and thereby forming a Lithium metal - Copper - lithium metal (Li-Cu-Li).
  • Li-Cu-Li Lithium metal - Copper - lithium metal
  • This Li-Cu-Li layer was then encapsulated by the composite coating of Example 1.
  • the encapsulation of composite coating over the Li-Cu-Li was done either by spray layer formation or by doctor blade coating.
  • This composite coating over the Li-Cu-Li was at the thickness in the range of 5- 20 microns.
  • the fabrication of metal anode explained above, was performed in the glove box under inert atmosphere with less than 1 ppm of oxygen.
  • Figure 1 represented the metal anode comprising the copper collector 106, lithium metal layers 104, disposed above the current collector and the composite coating 102, disposed on the lithium metal layers.
  • Figure 2 depict the lithium-ion cell construction using the metal anode of the present disclosure.
  • Figure 2 represent the lithium cell constructed from metal anode 208 of the present disclosure as explained in Example 2, with anode current collector 210 on one end and with electrolyte 206 on the other end.
  • Lithium metal / lithium metal oxide was used the cathode 204 which was further attached to cathode current collector 202.
  • Figure 3 depict the lithium pouch cell construction with the metal anode of the present disclosure as explained above in Example 2. For pouch cell construction, square or rectangular shaped cathodes and anodes were sandwiched between the separator.
  • Lithium cell was constructed by tri-layer formation. The three layers comprised a cathode 304, a separator 302 and the metal anode 308 from example 2.
  • the anode(copper) current collector 310 was disposed between the metal anode comprising the composite coating.
  • the cathode 304 was constructed by coating the Lithium metal oxide over the cathode (aluminium) current collector 306 on both the sides.
  • the lithium metal oxide used in the present disclosure for fabrication of cathode was selected from the group consisting of LiCoO 2 , LiCo 0.99 Al 0.01 O 2 , LiNiO 2 , LiMnO 2 , LiCo 0.5 Ni 0.5 O 2 , LiCo 0.7 Ni 0.3 O 2 , LiCo 0.8 Ni 0.2 O 2 , LiCo 0.82 Ni 0.18 O 2 , LiCo 0.8 Ni 0.15 Al 0.05 O 2 , LiNi 0.4 Co 0.3 Mn 0.3 O 2 and LiNi 0.33 Co 0.33 Mn 0.34 O 2.
  • the thickness of the fabricated cathode was around 70 microns and was further used for cell construction.
  • the separator 302 used was a polymeric material chosen from polyethylene and polypropylene. The separator 302 was placed between the metal anode of the present disclosure and the fabricated cathode.
  • the composite coating of the present disclosure being a porous layer enhances the conductivity by allowing the movement lithium ions in and out for intercalation and also provide dendrite suppression and while at the lithium metal electrode the reaction occurred.
  • the separator was used to prevent electrical contact between the cathode and the anode while allowing ion conduction between the cathode and the anode.
  • the tri-layer comprising the anode, the separator and the cathode was fixed in an enclosure filled with electrolyte to obtain the Lithium cell of the present disclosure.
  • the electrolyte was solid or liquid electrolyte.
  • Lithium ion battery comprising the metal anode of the present disclosure provides an enhanced battery setup.
  • This metal anode comprising the copper current collector, the composite coating and the lithium metal layer would have improved conductivity properties and thereby upgrading battery characteristics. And more particularly improved the overall battery performance and battery life by increasing the number of charge/discharge cycles.
  • the present disclosure provides a metal anode comprising a copper current collector, lithium metal and a composite coating.
  • the composite coating is a binary mixture of porous mixed metal oxide and a conductive carbon nanotube.
  • the metal anode of the present disclosure suppresses the dendrite growth of lithium ion at the metal anode and shows enhanced conductivity.
  • the metal anode of the present disclosure helps in avoiding short circuits.
  • the metal anode shows high energy density and can be used in the portable electronics and in electric vehicles. In vehicles, lithium ion battery comprising the metal anode of the present disclosure shows increased performance, durability, serviceability, and ease of assembly. This metal anode reduces the weight of the batteries, incurs low cost and is easy to handle.

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  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
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  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
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Abstract

La présente invention concerne une anode métallique comprenant (a) un collecteur de courant de cuivre (106); (b) une couche métallique de lithium (104) disposée au-dessus du collecteur de courant de cuivre (106); (c) un revêtement composite (102) disposé sur la couche métallique de lithium (104). La présente invention révèle un revêtement composite comprenant un oxyde métallique mixte poreux et un nanotube de carbone. La présente invention révèle également un procédé pratique de fabrication de l'anode métallique.
PCT/IB2021/052426 2020-03-31 2021-03-24 Anode métallique pour batteries au lithium-ion WO2021198853A1 (fr)

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CN202180014416.7A CN115088106A (zh) 2020-03-31 2021-03-24 用于锂离子电池的金属阳极
EP21718653.5A EP4128397A1 (fr) 2020-03-31 2021-03-24 Anode métallique pour batteries au lithium-ion

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013085509A1 (fr) * 2011-12-07 2013-06-13 CNano Technology Limited Composition d'électrode pour pile ion-lithium
WO2016160958A1 (fr) * 2015-03-30 2016-10-06 SolidEnergy Systems Systèmes et procédés de revêtement composite destinés à des anodes au lithium métallique dans des applications de batterie
US20190044137A1 (en) * 2017-08-01 2019-02-07 Nanotek Instruments, Inc. Hybrid lithium anode electrode layer and lithium-ion battery containing same
US20190051905A1 (en) * 2017-08-14 2019-02-14 Nanotek Instruments, Inc. Anode-Protecting Layer for a Lithium Metal Secondary Battery and Manufacturing Method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013085509A1 (fr) * 2011-12-07 2013-06-13 CNano Technology Limited Composition d'électrode pour pile ion-lithium
WO2016160958A1 (fr) * 2015-03-30 2016-10-06 SolidEnergy Systems Systèmes et procédés de revêtement composite destinés à des anodes au lithium métallique dans des applications de batterie
US20190044137A1 (en) * 2017-08-01 2019-02-07 Nanotek Instruments, Inc. Hybrid lithium anode electrode layer and lithium-ion battery containing same
US20190051905A1 (en) * 2017-08-14 2019-02-14 Nanotek Instruments, Inc. Anode-Protecting Layer for a Lithium Metal Secondary Battery and Manufacturing Method

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