WO2015065118A1 - 전극조립체 및 그를 포함하는 리튬 이차전지 - Google Patents
전극조립체 및 그를 포함하는 리튬 이차전지 Download PDFInfo
- Publication number
- WO2015065118A1 WO2015065118A1 PCT/KR2014/010388 KR2014010388W WO2015065118A1 WO 2015065118 A1 WO2015065118 A1 WO 2015065118A1 KR 2014010388 W KR2014010388 W KR 2014010388W WO 2015065118 A1 WO2015065118 A1 WO 2015065118A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating layer
- porous coating
- electrode assembly
- porous
- anode
- Prior art date
Links
Images
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
- H01M4/62—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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- 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
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
- H01M10/14—Assembling a group of electrodes or separators
-
- 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
- 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
-
- 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
- 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
- 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
- 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
- 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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
-
- 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
-
- 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
- H01M4/80—Porous plates, e.g. sintered carriers
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/42—Acrylic resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/423—Polyamide resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/426—Fluorocarbon polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/429—Natural polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/431—Inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/454—Separators, membranes or diaphragms characterised by the material having a layered structure comprising a non-fibrous layer and a fibrous layer superimposed on one another
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
- H01M50/466—U-shaped, bag-shaped or folded
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electrode assembly and a lithium secondary battery comprising the same, and more particularly, to an electrode assembly having a separator sheet including a porous coating layer formed to selectively contact a cathode and an anode, and a lithium secondary battery comprising the same. It is about.
- the electrochemical device is the area that is receiving the most attention in this respect, and the development of a secondary battery capable of charging and discharging has been the focus of attention, and in recent years in the development of such a battery in order to improve the capacity density and specific energy R & D on the design of electrodes and batteries is underway.
- lithium secondary batteries developed in the early 1990s have a higher operating voltage and greater energy density than conventional batteries such as Ni-MH, Ni-Cd, and sulfuric acid-lead batteries that use an aqueous electrolyte solution. I am in the spotlight.
- a lithium secondary battery has safety problems such as ignition and explosion caused by using an organic electrolyte, and has a disadvantage in that manufacturing is difficult.
- the lithium secondary batteries as described above are produced by many companies, but their safety characteristics show different aspects. It is very important to evaluate the safety and secure the safety of the lithium secondary battery, and to secure such safety, a separator having a porous coating layer formed by coating a mixture of inorganic particles and a polymer binder on at least one surface of a porous substrate having a plurality of pores is Proposed.
- a separator manufacturing technique in which the composition or thickness of the outermost porous coating layer of the separator is applied asymmetrically has been applied so that the contact surfaces of the separators in contact with the cathode and the anode are suitable for the cathode and the anode, respectively.
- the lithium secondary battery is classified according to the structure of the electrode assembly of the cathode / separator / anode structure, typically, long sheet-shaped cathodes and anodes of the structure wound around the separator Jelly-roll (wound) electrode assembly, a predetermined length of a continuous separator sheet of bi-cell (full-cell) or full-cell unit cell laminated by the cathode and anode of a predetermined unit via a separator It is divided into a stack-folding electrode assembly and the like of the structure wound using.
- the structure of the electrode assembly of the cathode / separator / anode structure typically, long sheet-shaped cathodes and anodes of the structure wound around the separator Jelly-roll (wound) electrode assembly, a predetermined length of a continuous separator sheet of bi-cell (full-cell) or full-cell unit cell laminated by the cathode and anode of a predetermined unit via a separator It is divided into a stack-
- the jelly-roll electrode assembly can be selectively contacted with the cathode in terms of the structure by using the above-described separator asymmetrically applied to the composition or thickness of the porous coating layer.
- the long sheet-type cathode and anode are wound in a dense state and manufactured in a cylindrical or oval structure in cross section, stress caused by expansion and contraction of the electrode during charge and discharge accumulate inside the electrode assembly, and the accumulated When the stress exceeds a certain limit, deformation of the electrode assembly occurs. Due to the deformation of the electrode assembly, the spacing between the electrodes is uneven and the performance of the battery is drastically degraded, and the safety of the battery is threatened due to the internal short circuit.
- the long sheet-type cathode and the anode have to be wound, it is difficult to wind up quickly while keeping the gap between the cathode and the anode constant, which also has a problem of lowering productivity.
- the problem to be solved by the present invention by applying a separator formed on each side of the porous coating layer having a different composition, thickness or porosity, the porous coating layer suitable for the cathode and anode, respectively, by selectively contacting the cell, It is to provide an electrode assembly and a lithium secondary battery including the same to improve the degradation prevention and safety.
- At least one first electrode body including a cathode; At least one second electrode body comprising an anode; And a separator sheet separating between the first electrode body and the second electrode body, which are alternately stacked, and including a plurality of folding parts, wherein the separator sheet comprises a first porous polymer substrate and the first porous polymer.
- the electrode assembly includes a first porous coating layer and a second porous coating layer having a different composition, thickness, or porosity.
- the separator sheet may include a plurality of folding portions folded in a zigzag shape, and the electrode assembly may be a zigzag-folding type.
- the porosity of the first porous coating layer may be 20 to 50%, and the porosity of the second porous coating layer may be 30 to 60%.
- the ratio of the thickness of the first porous coating layer and the second porous coating layer may be 1: 9 to 4: 6, and the ratio of the thickness of the first porous coating layer and the second porous coating layer may be 6: 4. To 9: 1.
- the porosity of the first porous coating layer is 20 to 50%
- the porosity of the second porous coating layer is 30 to 60%
- the ratio of the thickness of the first porous coating layer and the second porous coating layer is , 1: 9 to 9: 1.
- the first porous coating layer may further include inorganic particles.
- the inorganic particles may be inorganic particles having a dielectric constant of 5 or more, inorganic particles having a lithium ion transfer ability, or a mixture thereof.
- the inorganic particles having the lithium ion transfer ability include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (Li x Ti y (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 3), lithium Aluminum Titanium Phosphate (Li x Al y Ti z (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 1, 0 ⁇ z ⁇ 3), (LiAlTiP) x O y series glass (0 ⁇ x ⁇ 4, 0 ⁇ y ⁇ 13), lithium lanthanum titanate (Li x La y TiO 3, 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 3), lithium germanium thiophosphate (Li x Ge y P z S w , 0 ⁇ x ⁇ 4, 0 ⁇ y ⁇ 1, 0 ⁇ z ⁇ 1, 0 ⁇ w ⁇ 5), lithium nitride (Li 3 PO 4
- the polymer binder is polyvinylidene fluoride (polyvinylidene fluoride (PVDF)), hexafluoro propylene (hexafluoro propylene, HFP), polyvinylidene fluoride-hexafuluropropylene (polyvinylidene fluoride-co- hexafluoro propylene), polyvinylidene fluoride-co-trichloroethylene, polymethyl methacrylate, polyacrylonitrile, polyvinylpyrrolidone, Polyvinylacetate, ethylene vinyl co-vinyl acetate, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate (cellulose acetate propionate), cyanoethylpullula n), cyanoethylpolyvinylalcohol, cyanoethylcellulose, cyanoethylsucrose, pullulan, carboxy
- the first porous polymer substrate may be a polyolefin-based porous membrane or a nonwoven fabric.
- the first porous polymer substrate may include high density polyethylene, low density polyethylene, linear low density polyethylene, ultra high molecular weight polyethylene, polypropylene, polybutylene, polypentene, polyethylene terephthalate, polybutylene terephthalate, Polyester, polyacetal, polyamide, polycarbonate, polyimide, polyetheretherketone, polyethersulfone, polyphenylene oxide ( polyphenyleneoxide), polyphenylene sulfide (polyphenylenesulfide) and polyethylene naphthalate (polyethylenenaphthalate) may be formed of any one or a mixture of two or more thereof selected from the group consisting of.
- the first porous polymer substrate may be formed of one layer or may be formed by stacking two or more layers.
- the cathode may be provided with a cathode active material containing a lithium-containing oxide.
- the anode may include an anode active material including a lithium metal, a carbon material, a metal compound, or a mixture thereof.
- the metal compound is Si, Ge, Sn, Pb, P, Sb, Bi, Al, Ga, In, Ti, Mn, Fe, Co, Ni, Cu, Zn, Ag, Mg, Sr, and Ba It may be any one selected from the group consisting of or a mixture of two or more thereof.
- the first electrode body may be formed of a single layer of cathode
- the second electrode body may be formed of a single layer of anode
- the first electrode body may include one or more cathodes, one or more anodes, and a separator separating the cathodes and the anodes stacked alternately.
- the separator is formed on one surface of the second porous polymer substrate, the second porous polymer substrate, includes a polymer binder, and is formed on the other surface of the third porous coating layer and the second porous polymer substrate facing the cathode. And a mixture of a polymer binder and inorganic particles, facing the anode, and having a fourth porous coating layer having a different composition, thickness, or porosity from the third porous coating layer.
- the porosity of the third porous coating layer may be 20 to 50%, and the porosity of the fourth porous coating layer may be 30 to 60%.
- the ratio of the thickness of the third porous coating layer and the fourth porous coating layer may be 1: 9 to 4: 6, and the ratio of the thickness of the third porous coating layer and the fourth porous coating layer may be 6: 4. To 9: 1.
- the porosity of the third porous coating layer is 20 to 50%
- the porosity of the fourth porous coating layer is 30 to 60%
- the ratio of the thickness of the third porous coating layer and the fourth porous coating layer is , 1: 9 to 9: 1.
- composition, thickness and porosity of the first porous coating layer and the third porous coating layer may be the same
- composition, thickness and porosity of the second porous coating layer and the fourth porous coating layer may be the same. have.
- the second electrode body may include one or more anodes, one or more cathodes, and a separator that separates the anodes and the cathodes stacked at each other.
- the separator is formed on one surface of the second porous polymer substrate, the second porous polymer substrate, includes a polymer binder, and is formed on the other surface of the third porous coating layer and the second porous polymer substrate facing the cathode. And a mixture of a polymer binder and inorganic particles, facing the anode, and having a fourth porous coating layer having a different composition, thickness, or porosity from the third porous coating layer.
- a cathode, a first separator, an anode, a second separator, and a cathode are sequentially stacked with a plurality of first bicells;
- a plurality of second bicells in which an anode, a second separator, a cathode, a first separator, and an anode are sequentially stacked;
- a separator sheet separating a plurality of first bi-cells and the second bi-cells stacked in a cross-section, and including a plurality of folding portions folded in a zigzag shape, wherein the separator sheet comprises: a first porous polymer substrate; It is formed on one surface of the first porous polymer substrate, includes a polymer binder, is formed on the first porous coating layer facing the cathode and the other surface of the first porous polymer substrate, and comprises a mixture of a polymer binder and inorganic particles, The second porous coating layer facing the anode and having a
- the electrode assembly A nonaqueous electrolyte solution for impregnating the electrode assembly; And a battery case incorporating the electrode assembly and the nonaqueous electrolyte solution, wherein the electrode assembly is a lithium secondary battery, wherein the electrode assembly is the electrode assembly of the present invention described above.
- a porous coating layer having different compositions, thicknesses, or porosities from each other is applied to each surface, so that the porous coating layers respectively suitable for the cathode and the anode are completely matched without mismatch.
- porous coating layer facing the anode by-products generated at the anode block pores of the porous substrate to prevent the degradation of the battery, and the porous coating layer facing the cathode improves its mechanical strength to improve battery safety. Can be improved.
- FIG. 1 is a cross-sectional view showing an A type bicell (first bicell).
- FIG. 2 is a cross-sectional view showing a type C bicell (second bicell).
- FIG 3 is a cross-sectional view schematically showing a cross section of a conventional stack-folding electrode assembly.
- FIG. 4 is a cross-sectional view schematically showing a cross section of the zigzag-folding electrode assembly of the present invention.
- Figure 5 is a graph showing the capacity retention ratio of the polymer pouch-type battery prepared in one embodiment and comparative example of the present invention.
- Figure 6 is a graph showing a comparison of the temperature change of the cell according to the nail penetration for the polymer pouch-type battery prepared in one embodiment and comparative example of the present invention.
- cathode 1 ⁇ third porous coating layer
- first porous coating layer 20 second bicell
- separator sheet 100 zigzag-folding electrode assembly
- At least one first electrode body including a cathode; At least one second electrode body comprising an anode; And a separator sheet separating between the first electrode body and the second electrode body, which are alternately stacked, and including a plurality of folding parts, wherein the separator sheet comprises a first porous polymer substrate and the first porous polymer.
- the electrode assembly includes a first porous coating layer and a second porous coating layer having a different composition, thickness, or porosity.
- porous coating layers suitable for each of the cathode and the anode are selectively faced, so that the first porous coating layer facing the cathode can improve its mechanical strength and improve the safety of the battery, and the second facing the anode.
- by-products generated at the anode block pores of the porous substrate to prevent the degradation of the battery.
- the separator sheet may include a plurality of folding portions folded in a zigzag shape, and the electrode assembly may be a zigzag-folding type.
- the porosity of the first porous coating layer may be 20 to 50%, and the porosity of the second porous coating layer may be 30 to 60%.
- the porosity of the second porous coating layer facing the anode by increasing the porosity of the second porous coating layer facing the anode, the by-products of the anode block pores of the separator, thereby delaying a phenomenon in which cell deterioration is accelerated.
- the ratio of the thickness of the first porous coating layer and the second porous coating layer may be 1: 9 to 4: 6, 6: 4 to 9: 1, more preferably 2: 8.
- the first porous coating layer may be composed of only a polymer binder as described above, but may be composed of a mixture of a polymer binder and inorganic particles as in the second porous coating layer.
- the inorganic particles in the first and second porous coating layers serve as a kind of spacer to maintain the physical form of the porous coating layer, thereby suppressing thermal shrinkage of the porous polymer substrate when the lithium secondary battery is overheated, and porous Even when the polymer substrate is damaged, the cathode and the anode are prevented from directly contacting each other, thereby contributing to the improvement of the safety of the lithium secondary battery.
- the inorganic particles that can be used in the present invention is not particularly limited as long as it is electrochemically stable. That is, the inorganic particles that can be used in the present invention are not particularly limited as long as the oxidation and / or reduction reactions do not occur in the operating voltage range of the lithium secondary battery (for example, 0 to 5V based on Li / Li + ).
- the ionic conductivity of the electrolyte may be improved by contributing to an increase in the dissociation degree of the electrolyte salt, such as lithium salt, in the liquid electrolyte.
- the inorganic particles may include high dielectric constant inorganic particles having a dielectric constant of 5 or more, or 10 or more.
- Non-limiting examples of inorganic particles having a dielectric constant of 5 or more include BaTiO 3 , Pb (Zr x Ti 1-x ) O 3 (PZT, where 0 ⁇ x ⁇ 1), Pb 1-x La x Zr 1-y Ti y O 3 (PLZT, where 0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1), (1-x) Pb (Mg 1/3 Nb 2/3 ) O 3 -xPbTiO 3 (PMN-PT, where , 0 ⁇ x ⁇ 1), Hafnia (HfO 2 ), SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , SiC, TiO 2 , It may be any one
- the inorganic particles may be inorganic particles having lithium ion transfer capability, that is, inorganic particles containing lithium elements but having a function of transferring lithium ions without storing lithium.
- inorganic particles having a lithium ion transfer capacity include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (Li x Ti y (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 3), Lithium aluminum titanium phosphate (Li x Al y Ti z (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 1, 0 ⁇ z ⁇ 3), 14Li 2 O-9Al 2 O 3 -38TiO 2 -39P 2 (LiAlTiP) x O y series glasses such as O 5 (0 ⁇ x ⁇ 4, 0 ⁇ y ⁇ 13), lithium lanthanum titanate (Li x La y TiO 3 , 0 ⁇ x
- the size of the inorganic particles is not limited, but for proper porosity of the separator and the separator sheet, the average particle diameter may be in the range of 0.001 ⁇ m to 100 ⁇ m.
- the polymer binder independently of each other, polyvinylidene fluoride (PVDF), hexafluoro propylene (HFP), polyvinylidene fluoride-hexafulopropylene (polyvinylidene fluoride-co-hexafluoro propylene, polyvinylidene fluoride-co-trichloroethylene, polymethyl methacrylate, polyacrylonitrile, polyvinylpyrrolidone (polyvinylpyrrolidone), polyvinylacetate, ethylene vinyl co-vinyl acetate, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose Cellulose acetate propionate, cyanoethylpullu (cyanoethylpullulan), cyanoethylpolyvinylalcohol, cyanoethylcellulose, cyanoethylsucrose, pullulan, carboxyl methyl
- the adhesive force between the cathode and the anode and the separator by using a material having a high affinity with the binder used in each of the cathode and the anode as a kind of the polymer binder constituting the first porous coating layer and the second porous coating layer facing the cathode and the anode, respectively Can improve.
- the first porous polymer substrate of the present invention any porous polymer substrate commonly used in the art can be used, for example, a polyolefin-based porous membrane (membrane) or non-woven fabric can be used, but is specifically limited thereto It is not.
- polyolefin-based porous membrane examples include polyethylene, polypropylene, polybutylene, polypentene, such as high density polyethylene, linear low density polyethylene, low density polyethylene, ultra high molecular weight polyethylene, respectively, or a mixture thereof
- polyolefin-based polymers such as polyethylene, polypropylene, polybutylene, polypentene, such as high density polyethylene, linear low density polyethylene, low density polyethylene, ultra high molecular weight polyethylene, respectively, or a mixture thereof
- polyethylene such as polyethylene, polypropylene, polybutylene, polypentene, such as high density polyethylene, linear low density polyethylene, low density polyethylene, ultra high molecular weight polyethylene, respectively, or a mixture thereof
- polypentene such as high density polyethylene, linear low density polyethylene, low density polyethylene, ultra high molecular weight polyethylene, respectively, or a mixture thereof
- the nonwoven fabric may be, for example, polyethylene terephthalate, polybutyleneterephthalate, polyester, polyacetal, polyamide, polycarbonate, or polycarbonate. ), Polyimide, polyetheretherketone, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide, polyethylenenaphthalate, etc. Or the nonwoven fabric formed from the polymer which mixed these is mentioned.
- the structure of the nonwoven can be a spunbond nonwoven or melt blown nonwoven composed of long fibers.
- the thickness of the porous polymer substrate is not particularly limited, but may be 5 to 50 ⁇ m, and the pore size and pore present in the porous polymer substrate are also not particularly limited, but may be 0.01 to 50 ⁇ m and 10 to 95%, respectively.
- the porous polymer substrate may be formed of one layer or may be formed by stacking two or more layers.
- the cathode has a structure in which a cathode layer including a cathode active material, a conductive material, and a binder is supported on one or both surfaces of a current collector.
- the cathode active material may include a lithium-containing oxide, a lithium-containing transition metal oxide may be preferably used.
- a lithium-containing oxide a lithium-containing transition metal oxide
- Li x CoO 2 (0.5 ⁇ x ⁇ 1.3), Li x NiO 2 (0.5 ⁇ x ⁇ 1.3), Li x MnO 2 (0.5 ⁇ x ⁇ 1.3), Li x Mn 2 O 4 (0.5 ⁇ x ⁇ 1.3), Li x (Ni a Co b Mn c ) O 2 (0.5 ⁇ x ⁇ 1.3, 0 ⁇ a ⁇ 1, 0 ⁇ b ⁇ 1, 0 ⁇ c ⁇ 1, a + b + c 1), Li x Ni 1-y Co y O 2 (0.5 ⁇ x ⁇ 1.3, 0 ⁇ y ⁇ 1), Li x Co 1-y Mn y O 2 (0.5 ⁇ x ⁇ 1.3, 0 ⁇ y ⁇ 1), Li x Ni 1-y Mn y O 2 (0.5 ⁇ x ⁇ 1.3
- the conductive material is not particularly limited as long as it is an electronic conductive material that does not cause chemical change in the lithium secondary battery.
- carbon black, graphite, carbon fiber, carbon nanotubes, metal powder, conductive metal oxide, organic conductive materials, and the like can be used, and currently commercially available products as acetylene black series (Chevron Chemical) Chevron Chemical Company or Gulf Oil Company, etc., Ketjen Black EC series (Armak Company), Vulcan XC-72 (Cabot Company) (Cabot Company) and Super P (MMM).
- acetylene black, carbon black, graphite, etc. are mentioned.
- the anode has a structure in which an anode layer including an anode active material and a binder is supported on one side or both sides of a current collector.
- anode active material a lithium metal, a carbon material, a metal compound, or a mixture thereof, which may normally occlude and release lithium ions, may be used.
- both low crystalline carbon and high crystalline carbon may be used.
- Soft crystalline carbon and hard carbon are typical low crystalline carbon
- high crystalline carbon is natural graphite, Kish graphite, pyrolytic carbon, liquid crystal pitch-based carbon fiber.
- High temperature calcined carbon such as (mesophase pitch based carbon fiber), meso-carbon microbeads, Mesophase pitches and petroleum or coal tar pitch derived cokes.
- metal elements such as Si, Ge, Sn, Pb, P, Sb, Bi, Al, Ga, In, Ti, Mn, Fe, Co, Ni, Cu, Zn, Ag, Mg, Sr, Ba, etc.
- the compound containing 1 or more types is mentioned.
- These metal compounds may be used in any form, such as single, alloys, oxides (TiO 2 , SnO 2, etc.), nitrides, sulfides, borides, and alloys with lithium. High capacity can be achieved.
- one or more elements selected from Si, Ge, and Sn may be contained, and one or more elements selected from Si and Sn may further increase the capacity of the battery.
- the binder used for the cathode and the anode has a function of retaining the cathode active material and the anode active material in the current collector and connecting the active materials, and a binder commonly used may be used without limitation.
- PVDF-co-HFP polyvinylidene fluoride-hexafluorofluoropropylene
- PVDF polyvinylidene fluoride
- PVDF polyacrylonitrile
- binders such as (polymethyl methacrylate), styrene-butadiene rubber (SBR), and carboxyl methyl cellulose (CMC).
- the current collectors used for the cathode and the anode are metals of high conductivity, and metals to which the slurry of the active material can easily adhere can be used as long as they are not reactive in the voltage range of the battery.
- a non-limiting example of a cathode current collector is a foil prepared by aluminum, nickel or a combination thereof
- a non-limiting example of an anode current collector is copper, gold, nickel or a copper alloy or a combination thereof.
- the current collector may be used by stacking substrates made of the materials.
- the cathode and the anode are kneaded using an active material, a conductive material, a binder, and a high boiling point solvent to form an electrode mixture, and then the mixture is applied to a copper foil of a current collector, dried, and press-molded. It may be produced by heat treatment under vacuum at a temperature of about 2 hours.
- the thickness of the electrode layer of the cathode may be 30 to 120 ⁇ m, or 50 to 100 ⁇ m
- the thickness of the electrode layer of the anode may be 1 to 100 ⁇ m, or 3 to 70 ⁇ m.
- the first electrode body may be formed of a single layer of cathode
- the second electrode body may be formed of a single layer of anode
- the first electrode body may include one or more cathodes, one or more anodes, and a separator that separates the cathode and the anode stacked at an intersection
- the second electrode body may include one or more anodes and one or more anodes. It may include a separator for separating between the cathode and the cathode stacked in the above-described cathode and cross.
- the separator is formed on one surface of the second porous polymer substrate, the second porous polymer substrate, includes a polymer binder, and is formed on the other surface of the third porous coating layer and the second porous polymer substrate facing the cathode. And a mixture of a polymer binder and inorganic particles, facing the anode, and having a fourth porous coating layer having a different composition, thickness, or porosity from the third porous coating layer.
- porous coating layers suitable for each of the cathode and the anode present in the first electrode body and the second electrode body are selectively faced to each other, so that the mechanical strength of the third porous coating layer facing the cathode is improved to improve battery safety.
- by-products generated at the anode may prevent pores of the porous substrate from accelerating degeneration of the battery.
- the third porous coating layer may have the same porosity, composition, or thickness as the first porous coating layer
- the fourth porous coating layer may have the same porosity, composition, or thickness as the second porous coating layer
- the second porous polymer substrate may be the same as the first porous polymer substrate described above.
- FIG. 1 is a cross-sectional view showing an A-type bicell (first bicell)
- FIG. 2 is a cross-sectional view showing a C-type bicell (second bicell)
- FIG. 3 is a view of a conventional stack-folding electrode assembly.
- 4 is a cross-sectional view schematically showing a cross section
- FIG. 4 is a cross-sectional view schematically showing a cross section of a zigzag-folding electrode assembly of the present invention.
- FIGS. 1 to 4 the characteristics of the zigzag-foldable electrode assembly according to an embodiment of the present invention will be described in comparison with the conventional stack-folded electrode assembly.
- FIG. 1 shows an A-type bicell (corresponding to the first bicell 10 of the present invention), in which the cathode 1, the first separator 4, the anode 2, and the second are sequentially from the lower surface.
- the separator 5 and the cathode 1 are stacked to each other, and the first separator 4 includes a third porous coating layer 1 ′, a second porous polymer substrate 3, and a fourth porous coating layer 2 ′.
- the second separator 5 is formed by stacking a fourth porous coating layer 2 ′, a second porous polymer substrate 3, and a third porous coating layer 1 ′.
- the second separator 5 shows a C-type bicell (corresponding to the second bicell 20 of the present invention), in which the anode 2, the second separator 5, the cathode 1, and the first are in order from the lower surface.
- the separator 4 and the anode 2 are formed by lamination, and the second separator 5 includes a fourth porous coating layer 2 ′, a second porous polymer substrate 3, and a third porous coating layer 1 ′.
- the first separator 4 is formed by stacking a third porous coating layer 1 ′, a second porous polymer substrate 3, and a fourth porous coating layer 2 ′.
- the bicells 10 and 20 are formed by selectively contacting a porous coating layer suitable for each of the cathode 1 and the anode 2.
- Tables 1 and 2 the mismatch occurrence rate according to the number of bicells existing in the conventional stack-foldable electrode assembly is shown in Tables 1 and 2 below.
- Table 1 shows the case where n + 1 is a multiple of 4 (n is the total number of bicells), and Table 2 shows the case where n-1 is a multiple of 4 (n is the total number of bicells).
- the separator sheet 40 faces the first porous coating layer 10 ′, but the anode is mismatched.
- a plurality of first bicells in which the cathode 1, the first separator 4, the anode 2, the second separator 5, and the cathode 1 are sequentially stacked 10);
- a plurality of second bicells 20 in which an anode 2, a second separator 5, a cathode 1, a first separator 4, and an anode 2 are sequentially stacked;
- a separator sheet 40 that separates the first bi-cell 10 and the second bi-cell 20 stacked in a cross-section, and includes a plurality of folding portions folded in a zigzag shape.
- the first 40 is formed on one surface of the first porous polymer substrate 30 and the first porous polymer substrate 30, and includes a polymer binder, and faces the cathode 1. And formed on the other surface of the first porous polymer substrate 30, and include a mixture of a polymer binder and inorganic particles, and face the anode 2, and have a composition, thickness, and thickness of the first porous coating layer 10 ′. Or a second porous coating layer 20 ′ having a different porosity from each other, and the first separator 4 and the second separator 5 are each independently of the second porous polymer substrate 3 and the second.
- the polymer bar is formed on one surface of the porous polymer substrate 3 It further comprises, and formed on the other surface of the third porous coating layer (1 ⁇ ) and the second porous polymer substrate (3) facing the cathode (1), and comprises a mixture of a polymer binder and inorganic particles, the anode A zigzag-foldable electrode assembly 100 is provided that faces (2) and includes a fourth porous coating layer 2 'different from the third porous coating layer 1' and having a composition, thickness, or porosity different from each other.
- Table 3 shows the rate of mismatching according to the number of bicells present in the zigzag-folding electrode assembly according to an embodiment of the present invention.
- the zigzag-folded electrode assembly 100 is manufactured using the separator sheet 40 including a plurality of folding portions folded in a zigzag shape, a mismatch between the electrode and the porous coating layer is achieved. Will not occur.
- the electrode assembly A nonaqueous electrolyte solution for impregnating the electrode assembly; And a battery case incorporating the electrode assembly and the nonaqueous electrolyte solution, wherein the electrode assembly is a lithium secondary battery, wherein the electrode assembly is the electrode assembly of the present invention described above.
- the nonaqueous electrolyte may include an electrolyte salt and an organic solvent, and the electrolyte salt is a lithium salt.
- the lithium salt may be used without limitation those conventionally used in the lithium secondary battery electrolyte.
- organic solvent included in the aforementioned non-aqueous electrolyte those conventionally used in the lithium secondary battery electrolyte may be used without limitation, and for example, ethers, esters, amides, linear carbonates, and cyclic carbonates may be used alone or in combination of two or more. It can be mixed and used.
- carbonate compounds which are typically cyclic carbonates, linear carbonates, or mixtures thereof may be included.
- cyclic carbonate compound examples include ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, vinylene carbonate, vinylethylene carbonate and any one selected from the group consisting of halides thereof or mixtures of two or more thereof.
- halides include, for example, fluoroethylene carbonate (FEC), but are not limited thereto.
- linear carbonate compounds may be any one selected from the group consisting of dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate, ethylmethyl carbonate (EMC), methylpropyl carbonate and ethylpropyl carbonate. Mixtures of two or more of them may be representatively used, but are not limited thereto.
- ethylene carbonate and propylene carbonate which are cyclic carbonates among the carbonate-based organic solvents, are high viscosity organic solvents and have a high dielectric constant, so that they can dissociate lithium salts in the electrolyte better, and cyclic carbonates such as dimethyl carbonate and diethyl carbonate
- cyclic carbonates such as dimethyl carbonate and diethyl carbonate
- any one selected from the group consisting of dimethyl ether, diethyl ether, dipropyl ether, methylethyl ether, methylpropyl ether, and ethylpropyl ether, or a mixture of two or more thereof may be used. It is not limited to this.
- esters in the organic solvent include methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -valerolactone and One or a mixture of two or more selected from the group consisting of ⁇ -caprolactone may be used, but is not limited thereto.
- the injection of the nonaqueous electrolyte may be performed at an appropriate step in the manufacturing process of the lithium secondary battery according to the manufacturing process and required physical properties of the final product. That is, the lithium secondary battery may be applied before assembling or at the final stage of assembling the electrochemical device.
- a cathode active material of Li (Li 0.2 Mn 0.55 Ni 0.15 Co 0.1 ) O 2 Denka black conductive material: A PVDF binder was added at a weight% of 90: 5: 5 to slurry After the preparation, the slurry was coated on a 20 ⁇ m thick aluminum (Al) foil, which is a cathode current collector, and rolled and dried to prepare a cathode.
- a slurry was prepared by adding 96% by weight of natural graphite as an anode active material, 3% by weight of PVDF as a binder, and 1% by weight of denca black as a conductive material. It was coated on a 10 ⁇ m thick copper (Cu) foil as an anode current collector, rolled and vacuum dried to produce an anode.
- DI water deionized water
- each prepared slurry for the second porous coating layer was prepared.
- Each of these slurries were then coated on both sides of a porous substrate consisting of three layers of polypropylene / polyethylene / polypropylene (PP / PE / PP). That is, one surface of the porous substrate is coated with a slurry for the first porous coating layer to form a first porous coating layer, and a slurry for the second porous coating layer is formed to form a second porous coating layer.
- the ratio of the thickness of the first porous coating layer and the second porous coating layer was formed to be 1: 9, the porosity was adjusted to be 40% and 60%, respectively.
- Ethylene carbonate (EC): propylene carbonate (PC): diethyl carbonate (DEC) 30: 20: 50% by weight, lithium hexafluoro phosphate (LiPF 6 ) to prepare a non-aqueous electrolyte solution.
- EC propylene carbonate
- PC diethyl carbonate
- LiPF 6 lithium hexafluoro phosphate
- a polymer pouch-type battery having a discharge capacity of 40 Ah and a total of 23 bicells was assembled.
- the zigzag folding method was used as shown in FIG. 4, and after the surface of the thick separator of the porous coating layer was assembled to contact the anode, the lithium secondary battery was manufactured by injecting the nonaqueous electrolyte.
- the battery was charged up to 3.8 V, and a part of the surface of the battery case was cut and degassed for 2 seconds at a vacuum pressure of -95 kPa, and then the battery case was sealed. Subsequently, discharge was performed at 0.1 C under the conditions of CC / CV up to 4.5 V and 0.1 C under the conditions of CC up to 2.5 V, and then a part of the sealed battery case was cut, and a vacuum pressure of -95 kPa was applied. After degassing for 2 seconds, the cut surface was sealed with heat and pressure to prepare a final lithium secondary battery.
- a manufacturing and activation process of the lithium secondary battery was performed in the same manner as in the embodiment, except that the lithium secondary battery was assembled in a stack & folding manner as shown in FIG. 3. At this time, the number of mismatches between the separator sheet and the outermost anode of the bicell was confirmed as 12 planes.
- the porous coating layer dispersed in an acetone solvent.
- the slurry was then coated on both sides of the porous substrate consisting of three layers of polypropylene / polyethylene / polypropylene (PP / PE / PP).
- the ratio of the thicknesses of the porous coating layers coated on both surfaces of the porous substrate was formed to be 5: 5 symmetry, and the porosity was adjusted to 50%. That is, the total amount of the inorganic material coated on both sides of the separator and the average porosity of the porous coating layer was prepared to be the same conditions as in the embodiment.
- a polymer pouch-type battery having a discharge capacity of 40 Ah and a total of 23 bicells was assembled.
- a stack & folding method was used as in FIG. 3, and a lithium secondary battery was manufactured by injecting the nonaqueous electrolyte.
- FIG. 1 is a graph showing capacity retention rates of the polymer pouch-type batteries of Examples and Comparative Examples 1 and 2.
- FIG. 1 is a graph showing capacity retention rates of the polymer pouch-type batteries of Examples and Comparative Examples 1 and 2.
- FIG. 6 is a graph showing a comparison of the temperature change of the cell according to the nail penetration for the polymer pouch-type battery prepared in Examples, Comparative Examples 1 and 2.
- the batteries of Example and Comparative Example 1 did not ignite, but the batteries of Comparative Example 2 ignited after about 10 minutes had passed through.
- the temperature of the battery after the penetration is lower than that of Comparative Example 1, it can be confirmed that the battery prepared in Example was more excellent in safety than the case of Comparative Examples 1 and 2.
Abstract
Description
바이셀의 개수 | 3 | 7 | 11 | 15 | 19 | 23 | 27 | 31 | 35 | 39 |
C 타입 바이셀의 개수 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
세퍼레이터 시트와 대면하는 애노드 면수 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | 40 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수의 비율(%) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
전체 애노드 면수(전체 애노드 수×2) | 10 | 22 | 34 | 46 | 58 | 70 | 82 | 94 | 106 | 118 |
전체 애노드 면수 중 미스매칭 비율(%) | 20.0 | 18.2 | 17.6 | 17.4 | 17.2 | 17.1 | 17.0 | 17.0 | 16.9 | 16.9 |
바이셀의 개수 | 5 | 9 | 13 | 17 | 21 | 25 | 29 | 33 | 37 | 41 |
C 타입 바이셀의 개수 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 |
세퍼레이터 시트와 대면하는 애노드 면수 | 6 | 10 | 14 | 18 | 22 | 26 | 30 | 34 | 38 | 42 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수의 비율(%) | 33.3 | 40.0 | 42.9 | 44.4 | 45.5 | 46.2 | 46.7 | 47.1 | 47.4 | 47.6 |
전체 애노드 면수(전체 애노드 수×2) | 16 | 28 | 40 | 52 | 64 | 76 | 88 | 100 | 112 | 124 |
전체 애노드 면수 중 미스매칭 비율(%) | 12.5 | 14.3 | 15.0 | 15.4 | 15.6 | 15.8 | 15.9 | 16.0 | 16.1 | 16.1 |
바이셀의 개수 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 |
C 타입 바이셀의 개수 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
세퍼레이터 시트와 대면하는 애노드 면수 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
세퍼레이터 시트와 대면하나, 미스매칭이 일어난 애노드 면수의 비율(%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
전체 애노드 면수(전체 애노드 수×2) | 10 | 16 | 22 | 28 | 34 | 40 | 46 | 52 | 58 | 64 |
전체 애노드 면수 중 미스매칭 비율(%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Claims (32)
- 캐소드를 포함하는 하나 이상의 제1 전극체;애노드를 포함하는 하나 이상의 제2 전극체; 및교차로 적층된 상기 제1 전극체와 상기 제2 전극체의 사이를 분리시키며, 다수의 폴딩부를 포함하는 세퍼레이터 시트;를 구비하되,상기 세퍼레이터 시트는, 제1 다공성 고분자 기재, 상기 제1 다공성 고분자 기재의 일면에 형성되고, 고분자 바인더를 포함하며, 상기 캐소드와 대면하는 제1 다공성 코팅층 및 상기 제1 다공성 고분자 기재의 타면에 형성되고, 고분자 바인더와 무기물 입자의 혼합물을 포함하며, 상기 애노드와 대면하고, 상기 제1 다공성 코팅층과 조성, 두께 또는 기공도가 서로 상이한 제2 다공성 코팅층을 구비하는 전극조립체.
- 제1항에 있어서,상기 세퍼레이터 시트는, 지그재그형으로 접힌 다수의 폴딩부를 포함하고,상기 전극조립체는, 지그재그-폴딩형인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 코팅층의 기공도는, 20 내지 50 %이고, 상기 제2 다공성 코팅층의 기공도는, 30 내지 60 %인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 코팅층과 상기 제2 다공성 코팅층의 두께의 비는, 1:9 내지 4:6인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 코팅층과 상기 제2 다공성 코팅층의 두께의 비는, 6:4 내지 9:1인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 코팅층의 기공도는, 20 내지 50 %이고, 상기 제2 다공성 코팅층의 기공도는, 30 내지 60 %이며,상기 제1 다공성 코팅층과 상기 제2 다공성 코팅층의 두께의 비는, 1:9 내지 9:1인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 코팅층은, 무기물 입자를 더 포함하는 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 무기물 입자는, 유전율 상수가 5 이상인 무기물 입자, 리튬 이온 전달 능력을 갖는 무기물 입자 또는 이들의 혼합물인 것을 특징으로 하는 전극조립체.
- 제8항에 있어서,상기 유전율 상수가 5 이상인 무기물 입자는, BaTiO3, Pb(ZrxTi1-x)O3(PZT, 여기서, 0<x<1임), Pb1-xLaxZr1-yTiyO3(PLZT, 여기서, 0 < x < 1, 0 < y < 1임), (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(PMN-PT, 여기서, 0 < x < 1), 하프니아(HfO2), SrTiO3, SnO2, CeO2, MgO, NiO, CaO, ZnO, ZrO2, Y2O3, Al2O3, SiC, TiO2, SiO2, AlOOH 및 Al(OH)3로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전극조립체.
- 제8항에 있어서,상기 리튬 이온 전달 능력을 갖는 무기물 입자는, 리튬 포스페이트(Li3PO4), 리튬 티타늄 포스페이트(LixTiy(PO4)3, 0<x<2, 0<y<3), 리튬 알루미늄 티타늄 포스페이트(LixAlyTiz(PO4)3, 0<x<2, 0<y<1, 0<z<3), (LiAlTiP)xOy계열 글래스(0<x<4, 0<y<13), 리튬 란탄 티타네이트(LixLayTiO3, 0<x<2, 0<y<3), 리튬 게르마니움 티오포스페이트(LixGeyPzSw, 0<x<4, 0<y<1, 0<z<1, 0<w<5), 리튬 나이트라이드(LixNy, 0<x<4, 0<y<2), SiS2(LixSiySz, 0<x<3, 0<y<2, 0<z<4)계열 글래스 및 P2S5(LixPySz, 0<x<3, 0<y<3, 0<z<7)계열 글래스로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 고분자 바인더는, 폴리비닐리덴 풀루오라이드 (polyvinylidene fluoride, PVDF), 헥사풀루오로프로필렌 (hexafluoro propylene, HFP), 폴리비닐리덴 풀루오라이드-헥사풀루오로프로필렌 (polyvinylidene fluoride-co-hexafluoro propylene), 폴리비닐리덴 풀루오라이드-트리클로로에틸렌(polyvinylidene fluoride-co-trichloroethylene), 폴리메틸 메타크릴레이트 (polymethyl methacrylate), 폴리아크릴로니트릴 (polyacrylonitrile), 폴리비닐피롤리돈 (polyvinylpyrrolidone), 폴리비닐아세테이트 (polyvinylacetate), 에틸렌 비닐 아세테이트 공중합체 (polyethylene-co-vinyl acetate), 폴리에틸렌옥사이드 (polyethylene oxide), 셀룰로오스 아세테이트 (cellulose acetate), 셀룰로오스 아세테이트 부틸레이트 (cellulose acetate butyrate), 셀룰로오스 아세테이트 프로피오네이트 (cellulose acetate propionate), 시아노에틸풀루란 (cyanoethylpullulan), 시아노에틸폴리비닐알콜 (cyanoethylpolyvinylalcohol), 시아노에틸셀룰로오스 (cyanoethylcellulose), 시아노에틸수크로오스 (cyanoethylsucrose), 풀루란 (pullulan), 카르복실 메틸 셀룰로오스 (carboxyl methyl cellulose), 아크릴로니트릴스티렌부타디엔 공중합체 (acrylonitrile-styrene-butadiene copolymer) 및 폴리이미드 (polyimide)로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 고분자 기재는, 폴리올레핀계 다공성 막 또는 부직포인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 고분자 기재는, 고밀도 폴리에틸렌, 저밀도 폴리에틸렌, 선형저밀도 폴리에틸렌, 초고분자량 폴리에틸렌, 폴리프로필렌, 폴리부틸렌, 폴리펜텐, 폴리에틸렌테레프탈레이트(polyethyleneterephthalate), 폴리부틸렌테레프탈레이트 (polybutyleneterephthalate), 폴리에스테르(polyester), 폴리아세탈(polyacetal), 폴리아미드(polyamide), 폴리카보네이트(polycarbonate), 폴리이미드(polyimide), 폴리에테르에테르케톤(polyetheretherketone), 폴리에테르설폰(polyethersulfone), 폴리페닐렌옥사이드(polyphenyleneoxide), 폴리페닐렌설파이드(polyphenylenesulfide) 및 폴리에틸렌나프탈레이트(polyethylenenaphthalate)으로 이루어진 군으로부터 선택된 어느 하나 또는 이들 중 2종 이상의 혼합물로 형성된 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 다공성 고분자 기재는, 하나의 층으로 형성되거나, 2 이상의 층이 적층되어 형성되는 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 캐소드는, 리튬 함유 산화물을 포함하는 캐소드 활물질을 구비하는 것을 특징으로 하는 전극조립체.
- 제15항에 있어서,상기 리튬 함유 산화물은, 리튬 함유 전이금속 산화물인 것을 특징으로 하는 전극조립체.
- 제16항에 있어서,상기 리튬 함유 전이금속 산화물은, LixCoO2(0.5<x<1.3), LixNiO2(0.5<x<1.3), LixMnO2(0.5<x<1.3), LixMn2O4(0.5<x<1.3), Lix(NiaCobMnc)O2(0.5<x<1.3, 0<a<1, 0<b<1, 0<c<1, a+b+c=1), LixNi1-yCoyO2(0.5<x<1.3, 0<y<1), LixCo1-yMnyO2(0.5<x<1.3, 0≤y<1), LixNi1-yMnyO2(0.5<x<1.3, O≤y<1), Lix(NiaCobMnc)O4(0.5<x<1.3, 0<a<2, 0<b<2, 0<c<2, a+b+c=2), LixMn2-zNizO4(0.5<x<1.3, 0<z<2), LixMn2-zCozO4(0.5<x<1.3, 0<z<2), LixCoPO4(0.5<x<1.3) 및 LixFePO4(0.5<x<1.3)로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 애노드는, 리튬 금속, 탄소재, 금속 화합물 또는 이들의 혼합물을 포함하는 애노드 활물질을 구비하는 것을 특징으로 하는 전극조립체.
- 제18항에 있어서,상기 금속 화합물은, Si, Ge, Sn, Pb, P, Sb, Bi, Al, Ga, In, Ti, Mn, Fe, Co, Ni, Cu, Zn, Ag, Mg, Sr, 및 Ba로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 전극체는, 단층의 캐소드로 이루어진 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제2 전극체는, 단층의 애노드로 이루어진 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제1 전극체는, 하나 이상의 캐소드, 하나 이상의 애노드 및 교차로 적층된 상기 캐소드와 상기 애노드의 사이를 분리시키는 세퍼레이터를 포함하는 것을 특징으로 하는 전극조립체.
- 제22항에 있어서,상기 세퍼레이터는, 제2 다공성 고분자 기재, 상기 제2 다공성 고분자 기재의 일면에 형성되고, 고분자 바인더를 포함하며, 상기 캐소드와 대면하는 제3 다공성 코팅층 및 상기 제2 다공성 고분자 기재의 타면에 형성되고, 고분자 바인더와 무기물 입자의 혼합물을 포함하며, 상기 애노드와 대면하고, 상기 제3 다공성 코팅층과 조성, 두께 또는 기공도가 서로 상이한 제4 다공성 코팅층을 구비하는 것을 특징으로 하는 전극조립체.
- 제23항에 있어서,상기 제3 다공성 코팅층의 기공도는, 20 내지 50 %이고, 상기 제4 다공성 코팅층의 기공도는, 30 내지 60 %인 것을 특징으로 하는 전극조립체.
- 제23항에 있어서,상기 제3 다공성 코팅층과 상기 제4 다공성 코팅층의 두께의 비는, 1:9 내지 4:6인 것을 특징으로 하는 전극조립체.
- 제23항에 있어서,상기 제3 다공성 코팅층과 상기 제4 다공성 코팅층의 두께의 비는, 6:4 내지 9:1인 것을 특징으로 하는 전극조립체.
- 제23항에 있어서,상기 제3 다공성 코팅층의 기공도는, 20 내지 50 %이고, 상기 제4 다공성 코팅층의 기공도는, 30 내지 60 %이며,상기 제3 다공성 코팅층과 상기 제4 다공성 코팅층의 두께의 비는, 1:9 내지 9:1인 것을 특징으로 하는 전극조립체.
- 제23항에 있어서,상기 제1 다공성 코팅층과 상기 제3 다공성 코팅층의 조성, 두께 및 기공도가 서로 동일하고, 상기 제2 다공성 코팅층과 상기 제4 다공성 코팅층의 조성, 두께 및 기공도가 서로 동일한 것을 특징으로 하는 전극조립체.
- 제1항에 있어서,상기 제2 전극체는, 하나 이상의 애노드, 하나 이상의 캐소드 및 교차로 적층된 상기 애노드와 상기 캐소드의 사이를 분리시키는 세퍼레이터를 포함하는 것을 특징으로 하는 전극조립체.
- 제29항에 있어서,상기 세퍼레이터는, 제2 다공성 고분자 기재, 상기 제2 다공성 고분자 기재의 일면에 형성되고, 고분자 바인더를 포함하며, 상기 캐소드와 대면하는 제3 다공성 코팅층 및 상기 제2 다공성 고분자 기재의 타면에 형성되고, 고분자 바인더와 무기물 입자의 혼합물을 포함하며, 상기 애노드와 대면하고, 상기 제3 다공성 코팅층과 조성, 두께 또는 기공도가 서로 상이한 제4 다공성 코팅층을 구비하는 것을 특징으로 하는 전극조립체.
- 캐소드, 제1 세퍼레이터, 애노드, 제2 세퍼레이터 및 캐소드가 순차적으로 적층된 복수의 제1 바이셀;애노드, 제2 세퍼레이터, 캐소드, 제1 세퍼레이터 및 애노드가 순차적으로 적층된 복수의 제2 바이셀; 및교차로 적층된 상기 제1 바이셀과 상기 제2 바이셀의 사이를 분리시키며, 지그재그형으로 접힌 다수의 폴딩부를 포함하는 세퍼레이터 시트;를 구비하되,상기 세퍼레이터 시트는, 제1 다공성 고분자 기재, 상기 제1 다공성 고분자 기재의 일면에 형성되고, 고분자 바인더를 포함하며, 상기 캐소드와 대면하는 제1 다공성 코팅층 및 상기 제1 다공성 고분자 기재의 타면에 형성되고, 고분자 바인더와 무기물 입자의 혼합물을 포함하며, 상기 애노드와 대면하고, 상기 제1 다공성 코팅층과 조성, 두께 또는 기공도가 서로 상이한 제2 다공성 코팅층을 구비하고,상기 제1 세퍼레이터 및 상기 제2 세퍼레이터는, 서로 독립적으로 제2 다공성 고분자 기재, 상기 제2 다공성 고분자 기재의 일면에 형성되고, 고분자 바인더를 포함하며, 상기 캐소드와 대면하는 제3 다공성 코팅층 및 상기 제2 다공성 고분자 기재의 타면에 형성되고, 고분자 바인더와 무기물 입자의 혼합물을 포함하며, 상기 애노드와 대면하고, 상기 제3 다공성 코팅층과 조성, 두께 또는 기공도가 서로 상이한 제4 다공성 코팅층을 구비하는 지그재그-폴딩형 전극조립체.
- 전극조립체;상기 전극조립체를 함침시키는 비수 전해액; 및상기 전극조립체와 상기 비수 전해액을 내장하는 전지케이스;를 포함하는 리튬 이차전지로서,상기 전극조립체는, 제1항 내지 제31항 중 어느 한 항의 전극조립체인 것을 특징으로 하는 리튬 이차전지.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/436,264 US9786891B2 (en) | 2013-10-31 | 2014-10-31 | Electrode assembly and lithium secondary battery comprising the same |
JP2016526334A JP6390037B2 (ja) | 2013-10-31 | 2014-10-31 | 電極組立体及びそれを含むリチウム二次電池 |
EP14857843.8A EP2996188B1 (en) | 2013-10-31 | 2014-10-31 | Electrode assembly and lithium secondary battery comprising the same |
PL14857843T PL2996188T3 (pl) | 2013-10-31 | 2014-10-31 | Zespół elektrod oraz litowa bateria akumulatorowa go zawierająca |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20130131681 | 2013-10-31 | ||
KR10-2013-0131681 | 2013-10-31 | ||
KR10-2014-0149996 | 2014-10-31 | ||
KR1020140149996A KR101618317B1 (ko) | 2013-10-31 | 2014-10-31 | 전극조립체 및 그를 포함하는 리튬 이차전지 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015065118A1 true WO2015065118A1 (ko) | 2015-05-07 |
Family
ID=53125876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2014/010388 WO2015065118A1 (ko) | 2013-10-31 | 2014-10-31 | 전극조립체 및 그를 포함하는 리튬 이차전지 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9786891B2 (ko) |
EP (1) | EP2996188B1 (ko) |
JP (1) | JP6390037B2 (ko) |
KR (1) | KR101618317B1 (ko) |
CN (2) | CN204614858U (ko) |
PL (1) | PL2996188T3 (ko) |
WO (1) | WO2015065118A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019515421A (ja) * | 2016-08-12 | 2019-06-06 | エルジー・ケム・リミテッド | 二次電池分離膜用インク組成物およびこれを含む二次電池用分離膜 |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102307909B1 (ko) * | 2015-05-08 | 2021-10-01 | 삼성에스디아이 주식회사 | 리튬 전지 |
KR101977639B1 (ko) * | 2016-02-16 | 2019-05-14 | 주식회사 엘지화학 | 전극조립체 및 그의 제조방법 |
CN106025374A (zh) * | 2016-05-29 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | 一种叠片电池的制作方法 |
WO2018009042A1 (ko) * | 2016-07-08 | 2018-01-11 | 주식회사 엘지화학 | 전극 조립체 및 그의 제조 방법 |
KR102016645B1 (ko) | 2016-07-08 | 2019-08-30 | 주식회사 엘지화학 | 전극 조립체 및 그의 제조 방법 |
CN106229465B (zh) * | 2016-08-18 | 2018-07-17 | 长安大学 | 一种基于1,4-萘二酸钴的锂离子电池负极及其制备方法 |
JP6854100B2 (ja) * | 2016-08-31 | 2021-04-07 | 株式会社日本マイクロニクス | 二次電池 |
CN109073709B (zh) * | 2016-11-04 | 2020-12-04 | 株式会社Lg化学 | 用于估计二次电池的反应的方法和用于该方法的包括电池单元的二次电池 |
EP3573140A4 (en) * | 2017-01-23 | 2020-11-11 | Hitachi Chemical Company, Ltd. | ELECTRODE FOR POWER DEVICES AND POWER DEVICE |
KR20180092364A (ko) * | 2017-02-09 | 2018-08-20 | 에스케이이노베이션 주식회사 | 리튬 이차 전지 |
EP3367483A1 (de) * | 2017-02-23 | 2018-08-29 | Alevo International, S.A. | Wiederaufladbare batteriezelle mit einem separator |
FR3068831B1 (fr) * | 2017-07-04 | 2021-11-26 | Commissariat Energie Atomique | Procedes de realisation d'un faisceau electrochimique d'un accumulateur metal-ion au moyen d'une membrane a electrolyte polymere gelifie, accumulateurs associes |
US20200243895A1 (en) * | 2017-09-29 | 2020-07-30 | Envision Aesc Energy Devices Ltd. | Secondary battery |
CN107528087B (zh) * | 2017-09-30 | 2020-07-14 | 惠州亿纬锂能股份有限公司 | 一种锂离子电池叠片电芯及其制备方法 |
KR102270120B1 (ko) * | 2017-12-01 | 2021-06-28 | 주식회사 엘지에너지솔루션 | 전극 및 전극조립체 |
WO2019108017A1 (ko) * | 2017-12-01 | 2019-06-06 | 주식회사 엘지화학 | 전극 및 전극조립체 |
CN108258299B (zh) * | 2018-01-10 | 2020-04-17 | 深圳市正翔电池能源有限公司 | 一种锂离子动力电池 |
CN109065817B (zh) * | 2018-08-22 | 2022-04-08 | 深圳市博盛新材料有限公司 | 一种多孔多层复合隔膜及其制备方法 |
US11322804B2 (en) | 2018-12-27 | 2022-05-03 | Sion Power Corporation | Isolatable electrodes and associated articles and methods |
US11637353B2 (en) | 2018-12-27 | 2023-04-25 | Sion Power Corporation | Electrodes, heaters, sensors, and associated articles and methods |
JP7320172B2 (ja) * | 2019-03-20 | 2023-08-03 | 株式会社Aescジャパン | 電極、電極の製造方法及び電池 |
CN112350026B (zh) * | 2019-12-25 | 2023-03-17 | 万向一二三股份公司 | 一种隔膜及使用该隔膜的锂电池 |
CN111816934A (zh) * | 2020-01-17 | 2020-10-23 | 深圳市麦格松电气科技有限公司 | 柱状二次电池及电池控制器 |
JP2023552533A (ja) * | 2021-07-09 | 2023-12-18 | エルジー エナジー ソリューション リミテッド | 電極組立体の製造装置および製造方法 |
CN115832166B (zh) * | 2021-09-23 | 2024-01-12 | 宁德时代新能源科技股份有限公司 | 正极极片、二次电池、电池模块、电池包和用电装置 |
CN115084437A (zh) * | 2022-08-23 | 2022-09-20 | 宁德时代新能源科技股份有限公司 | 负极极片及其制备方法、二次电池及用电装置 |
CN116315456B (zh) * | 2023-05-08 | 2023-08-01 | 合肥长阳新能源科技有限公司 | 一种五层共挤锂电池微孔隔膜及其制备方法 |
CN116315459B (zh) * | 2023-05-23 | 2023-09-05 | 宁德新能源科技有限公司 | 隔膜、电化学装置以及电子设备 |
CN116345069B (zh) * | 2023-05-29 | 2023-09-05 | 宁德卓高新材料科技有限公司 | 一种复合固态电解质隔膜及其制备方法及锂离子电池 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080095770A (ko) * | 2007-04-24 | 2008-10-29 | 주식회사 엘지화학 | 이종의 세퍼레이터를 구비한 전기화학소자 |
KR20120035858A (ko) * | 2010-10-05 | 2012-04-16 | 주식회사 엘지화학 | 사이클 특성이 개선된 전기화학소자 |
KR20130006256A (ko) * | 2011-07-07 | 2013-01-16 | 주식회사 엘지화학 | 전기화학소자용 전극 조립체 및 이를 구비한 전기화학소자 |
KR20130052526A (ko) * | 2011-11-11 | 2013-05-22 | 주식회사 엘지화학 | 세퍼레이터 및 이를 구비한 전기화학소자 |
KR20130066746A (ko) * | 2011-12-13 | 2013-06-21 | 주식회사 코캄 | 리튬 이차전지용 고내열성 복합체 세퍼레이터 및 이를 포함하는 리튬 이차전지 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100497147B1 (ko) * | 2000-02-08 | 2005-06-29 | 주식회사 엘지화학 | 다중 중첩 전기화학 셀 및 그의 제조방법 |
JP2007324073A (ja) * | 2006-06-05 | 2007-12-13 | Matsushita Electric Ind Co Ltd | リチウム二次電池並びにそのセパレータ及びその製造方法 |
KR101002161B1 (ko) | 2007-11-29 | 2010-12-17 | 주식회사 엘지화학 | 다공성 코팅층이 형성된 세퍼레이터, 그 제조방법 및 이를 구비한 전기화학소자 |
CN102064300A (zh) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | 一种锂离子二次电池用多孔复合隔膜及其制备方法 |
JP5966285B2 (ja) | 2011-09-05 | 2016-08-10 | 日産自動車株式会社 | 耐熱絶縁層付セパレータ |
US10461358B2 (en) * | 2011-10-11 | 2019-10-29 | Samsung Sdi Co., Ltd. | Rechargeable lithium battery |
US9412987B2 (en) | 2011-11-25 | 2016-08-09 | Nissan Motor Co., Ltd. | Separator for electric device and electric device using the same |
JP2013191485A (ja) * | 2012-03-15 | 2013-09-26 | Hitachi Maxell Ltd | 非水二次電池 |
-
2014
- 2014-10-31 PL PL14857843T patent/PL2996188T3/pl unknown
- 2014-10-31 WO PCT/KR2014/010388 patent/WO2015065118A1/ko active Application Filing
- 2014-10-31 KR KR1020140149996A patent/KR101618317B1/ko active IP Right Grant
- 2014-10-31 EP EP14857843.8A patent/EP2996188B1/en active Active
- 2014-10-31 CN CN201420642789.6U patent/CN204614858U/zh active Active
- 2014-10-31 JP JP2016526334A patent/JP6390037B2/ja active Active
- 2014-10-31 CN CN201410601757.6A patent/CN104600240B/zh active Active
- 2014-10-31 US US14/436,264 patent/US9786891B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080095770A (ko) * | 2007-04-24 | 2008-10-29 | 주식회사 엘지화학 | 이종의 세퍼레이터를 구비한 전기화학소자 |
KR20120035858A (ko) * | 2010-10-05 | 2012-04-16 | 주식회사 엘지화학 | 사이클 특성이 개선된 전기화학소자 |
KR20130006256A (ko) * | 2011-07-07 | 2013-01-16 | 주식회사 엘지화학 | 전기화학소자용 전극 조립체 및 이를 구비한 전기화학소자 |
KR20130052526A (ko) * | 2011-11-11 | 2013-05-22 | 주식회사 엘지화학 | 세퍼레이터 및 이를 구비한 전기화학소자 |
KR20130066746A (ko) * | 2011-12-13 | 2013-06-21 | 주식회사 코캄 | 리튬 이차전지용 고내열성 복합체 세퍼레이터 및 이를 포함하는 리튬 이차전지 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2996188A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019515421A (ja) * | 2016-08-12 | 2019-06-06 | エルジー・ケム・リミテッド | 二次電池分離膜用インク組成物およびこれを含む二次電池用分離膜 |
US11264675B2 (en) | 2016-08-12 | 2022-03-01 | Lg Chem, Ltd. | Ink composition for secondary battery separation film, and secondary battery separation film including same |
Also Published As
Publication number | Publication date |
---|---|
EP2996188B1 (en) | 2018-09-19 |
US9786891B2 (en) | 2017-10-10 |
EP2996188A4 (en) | 2016-06-22 |
CN104600240A (zh) | 2015-05-06 |
US20160028064A1 (en) | 2016-01-28 |
EP2996188A1 (en) | 2016-03-16 |
JP6390037B2 (ja) | 2018-09-19 |
CN104600240B (zh) | 2017-08-15 |
KR20150050505A (ko) | 2015-05-08 |
JP2016535401A (ja) | 2016-11-10 |
PL2996188T3 (pl) | 2019-06-28 |
CN204614858U (zh) | 2015-09-02 |
KR101618317B1 (ko) | 2016-05-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2015065118A1 (ko) | 전극조립체 및 그를 포함하는 리튬 이차전지 | |
WO2018097562A1 (ko) | 이차전지용 양극 및 이를 포함하는 리튬 이차전지 | |
WO2014182063A1 (ko) | 이차전지용 전극, 그의 제조방법, 그를 포함하는 이차전지 및 케이블형 이차전지 | |
WO2016060521A1 (ko) | 전기절연층이 코팅되어 있는 전극탭 및 이를 포함하는 이차전지 | |
WO2011019187A2 (ko) | 리튬 이차전지 | |
WO2015047034A1 (ko) | 리튬 이차전지용 세퍼레이터의 제조방법, 그 방법에 의해 제조된 세퍼레이터, 및 이를 포함하는 리튬 이차전지 | |
WO2012074300A2 (ko) | 리튬 이차전지 | |
WO2020067778A1 (ko) | 전기화학소자용 분리막 및 이를 제조하는 방법 | |
WO2020159296A1 (ko) | 절연필름을 포함하는 전극 조립체, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 | |
WO2013089428A1 (ko) | 전기화학소자용 전극 및 이를 구비한 전기화학소자 | |
WO2015105365A1 (ko) | 고 연신 특성의 분리막을 가진 전극조립체 및 이를 포함하는 이차전지 | |
WO2012093864A2 (ko) | 비대칭 코팅된 분리막을 포함하는 전극조립체 및 상기 전극조립체를 포함하는 전기화학소자 | |
WO2019203571A1 (ko) | 비대칭 구조의 이차전지용 난연 분리막 | |
WO2019135640A1 (ko) | 절연 코팅층이 구비된 전극탭을 포함하는 이차전지 | |
WO2019013449A1 (ko) | 전극 보호층을 포함하는 음극 및 이를 적용한 리튬 이차전지 | |
WO2019139424A1 (ko) | 리튬 전극을 포함하는 리튬 금속 이차전지의 제조방법 | |
WO2019093836A1 (ko) | 원통형 젤리롤에 사용되는 스트립형 전극 및 그를 포함하는 리튬 이차전지 | |
WO2015065116A1 (ko) | 유기-무기 복합 다공성 막, 이를 포함하는 세퍼레이터 및 전극 구조체 | |
WO2014200214A1 (ko) | 내진동 특성이 향상된 전기화학소자 및 전지 모듈 | |
WO2022075637A1 (ko) | 전극조립체의 적층 불량 검출 방법, 절연 부재를 포함하는 전극조립체 및 이를 포함하는 전지 셀 | |
WO2021172774A1 (ko) | 탭 상에 형성된 절연필름을 포함하는 전극 조립체, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 | |
WO2021020844A1 (ko) | 열적 안정성이 향상된 이차전지용 양극 및 그의 제조방법 | |
WO2021034060A1 (ko) | 내열층을 포함하는 전기화학소자용 분리막 및 이를 포함하는 이차 전지 | |
WO2020226367A1 (ko) | 바인더 수지 조성물 및 이를 포함하는 전기화학소자용 분리막 | |
WO2020159083A1 (ko) | 절연층이 형성되어 있는 전극을 포함하는 스택형 전극조립체 및 이를 포함하는 리튬 이차전지 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 14436264 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014857843 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14857843 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016526334 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |