JP7386432B2 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
- Publication number
- JP7386432B2 JP7386432B2 JP2020521809A JP2020521809A JP7386432B2 JP 7386432 B2 JP7386432 B2 JP 7386432B2 JP 2020521809 A JP2020521809 A JP 2020521809A JP 2020521809 A JP2020521809 A JP 2020521809A JP 7386432 B2 JP7386432 B2 JP 7386432B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- layer
- active material
- based active
- electrode composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 33
- 239000002131 composite material Substances 0.000 claims description 146
- 239000002409 silicon-based active material Substances 0.000 claims description 84
- 239000007773 negative electrode material Substances 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 183
- 239000000463 material Substances 0.000 description 38
- 239000002002 slurry Substances 0.000 description 32
- 239000010408 film Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 14
- 229910002804 graphite Inorganic materials 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 239000002388 carbon-based active material Substances 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000007600 charging Methods 0.000 description 5
- 239000002905 metal composite material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000003125 aqueous solvent Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910015746 LiNi0.88Co0.09Al0.03O2 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- H01M4/13—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
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
-
- 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
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
-
- 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
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- 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
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
-
- 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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Description
正極11は、正極集電体30と、正極集電体30の両面に形成された正極合材層31とを有する。正極集電体30には、アルミニウム、アルミニウム合金など、正極11の電位範囲で安定な金属の箔、当該金属を表層に配置したフィルム等を用いることができる。正極合材層31は、正極活物質、導電材、及び結着材を含む。正極11は、例えば正極集電体30上に正極活物質、導電材、及び結着材等を含む正極合材スラリーを塗布し、塗膜を乾燥させた後、圧縮して正極合材層31を正極集電体30の両面に形成することにより作製できる。
図2は、負極12の断面を示す図である。図1及び図2に例示するように、負極12は、負極集電体40と、電極体14の外側に向く負極集電体40の第1面40aに形成された負極合材層41(第1負極合材層)と、電極体14の内側に向く負極集電体40の第2面40bに形成された負極合材層42(第2負極合材層)とを有する。正極11は正極集電体30の両面に合材の組成が均一な正極合材層31が形成された層構造を有するが、負極12では、負極合材層41,42の少なくとも一方において、Si及びSi含有材料の少なくとも一方で構成されるSi系活物質の含有割合が連続的又は段階的に変化している。詳しくは後述するが、負極合材層41,42の少なくとも一方では、合材層の表面側と負極集電体40側とでSi系活物質の含有割合が異なっている。
セパレータ13には、イオン透過性及び絶縁性を有する多孔性シートが用いられる。多孔性シートの具体例としては、微多孔薄膜、織布、不織布等が挙げられる。セパレータ13の材質としては、ポリエチレン、ポリプロピレン等のオレフィン樹脂、セルロースなどが好適である。セパレータ13は、単層構造、積層構造のいずれであってもよい。セパレータ13の表面には、耐熱層などが形成されていてもよい。
[正極の作製]
LiNi0.88Co0.09Al0.03O2で表されるリチウム含有金属複合酸化物と、カーボンブラックと、ポリフッ化ビニリデンとを、100:0.8:0.7の質量比で混合し、N-メチル-2-ピロリドンを適量加えた後、これを混練して正極合材スラリーを調製した。当該正極合材スラリーを厚みが15μmのアルミニウム箔からなる正極集電体の両面に塗布し、塗膜を乾燥させた後、ローラーを用いて塗膜を圧延し、所定の電極サイズに切断して、正極集電体の両面に正極合材層が形成された正極を作製した。
黒鉛粉末と、炭素被膜を有するSiOx(x=1)で表されるSi含有材料とを、86.5:13.5の質量比で混合して、負極活物質を調製した。負極活物質と、CMCのナトリウム塩と、ポリアクリル酸とを、100:1:1の質量比で混合した後、固形分が60質量%となるように純水を加えて30分間混錬した。その後、固形分が50質量%となるように純水を追加し、負極活物質に対して1質量%となるようにSBRのディスパージョンを添加して、第1負極合材スラリーを調製した。
黒鉛粉末と、Si含有材料とを、88.5:11.5の質量比で混合したこと以外は、第1負極合材スラリーの場合と同様にして、第2負極合材スラリーを調製した。
黒鉛粉末と、Si含有材料とを、90.5:9.5の質量比で混合したこと以外は、第1負極合材スラリーの場合と同様にして、第3負極合材スラリーを調製した。
黒鉛粉末と、Si含有材料とを、92.5:7.5の質量比で混合したこと以外は、第1負極合材スラリーの場合と同様にして、第4負極合材スラリーを調製した。
上記第2負極合材スラリーを厚みが8μmの銅箔からなる負極集電体の一方の面に塗布した後、その上に重ねて上記第1負極合材スラリーを塗布した。同様に、負極集電体の他方の面に、上記第3負極合材スラリーを塗布した後、その上に重ねて上記第4負極合材スラリーを塗布した。このとき、各スラリーの塗布量は同じとした。次に、塗膜を乾燥させ、ローラーを用いて圧延した後、所定の電極サイズに切断して、2層構造の第1負極合材層及び2層構造の第2負極合材層を有する負極を作製した。なお、集電体の一方の面が電極体の外側に向く第1面、他方の面が電極体の内側に向く第2面になるように、後述の巻回型電極体を作製する。表1では、負極合材層を構成する各層における負極活物質の総質量に対するSi含有材料の含有割合を示す。また、表1のカッコ内に各層におけるSi含有材料のSi基準の含有割合を示す。
上記正極及び上記負極を、ポリエチレン製微多孔膜からなる厚みが20μmのセパレータを介して曲率半径1.5mmの巻き芯に巻回し、最外周面にテープを貼着して、円筒状の巻回型電極体を作製した。なお、正極の集電体露出部にアルミニウム製の正極リードを、負極の集電体露出部にニッケル製の負極リードをそれぞれ溶接した。
エチレンカーボネートと、ジメチルカーボネートと、エチルメチルカーボネートとを、20:60:20の体積比で混合した混合溶媒に、ビニレンカーボネートを2質量%の濃度で溶解させた。その後、LiPF6を1.3モル/リットルの濃度になるように溶解させて、非水電解質を調製した。
上記電極体を有底円筒形状の外装缶内に収容し、正極リードを封口体に、負極リードを外装缶の内底面にそれぞれ溶接した。上記非水電解質を外装缶に注液した後、封口体で外装缶の開口を封止して、非水電解質二次電池(高さ65mm、直径18mm、設計容量3500mAh)を作製した。
上記電池を、25℃の温度条件下、以下の条件で充放電して、容量維持率を求めた。表1に示す評価結果は、比較例1の電池の容量維持率を100としたときの相対値である。
<充放電条件>
充電:電流1050mAで電池電圧が4.2Vとなるまで定電流充電を行った。さらに、4.2Vの電圧で電流値が70mAとなるまで定電圧充電を行った。
放電:定電流1750mAで電圧が2.5Vとなるまで定電流放電を行った。
この充放電を100サイクル行い、下記式にて容量維持率を算出した。
容量維持率(%)=100サイクル目放電容量÷1サイクル目放電容量×100
各層における負極活物質の総質量に対するSi含有材料の含有割合を表1に示す量に変更したこと以外は、実施例1と同様にして、負極及び非水電解質二次電池を作製し、サイクル特性の評価を行った。
黒鉛と、Si含有材料とを、89.5:10.5の質量比で混合して調製した負極合材スラリーを用いて、第1及び第2負極合材層の各層を形成したこと以外は、実施例1と同様にして、負極及び非水電解質二次電池を作製し、サイクル特性の評価を行った。
各層における負極活物質の総質量に対するSi含有材料の含有割合を表1に示す量に変更したこと以外は、実施例1と同様にして、負極及び非水電解質二次電池を作製し、サイクル特性の評価を行った。
各層における負極活物質の総質量に対するSi含有材料の含有割合を表1に示す量に変更したこと以外は、実施例1と同様にして、負極及び非水電解質二次電池を作製し、サイクル特性の評価を行った。
Claims (5)
- 正極と負極がセパレータを介して巻回された巻回型の電極体を備える非水電解質二次電池であって、
前記負極は、負極集電体と、前記電極体の外側に向く前記負極集電体の第1面に形成された第1負極合材層と、前記電極体の内側に向く前記負極集電体の第2面に形成された第2負極合材層とを有し、
前記第1及び前記第2負極合材層は、Si及びSi含有化合物の少なくとも一方で構成されるSi系活物質を含み、
前記第2負極合材層における前記Si系活物質のSi基準の平均含有割合は、前記第1負極合材層における前記Si系活物質のSi基準の平均含有割合よりも低く、
前記第1負極合材層は、当該合材層の表面側に配置される第1層と、前記第1層よりも前記負極集電体側に配置され、前記Si系活物質のSi基準の含有割合が前記第1層よりも低い第2層とを含み、
前記第2負極合材層は、前記負極集電体側に配置される第3層と、前記第3層よりも当該合材層の表面側に配置され、前記Si系活物質のSi基準の含有割合が前記第3層よりも低い第4層とを含む、非水電解質二次電池。 - 前記第3層における前記Si系活物質のSi基準の平均含有割合は、前記第2層における前記Si系活物質のSi基準の平均含有割合よりも低い、請求項1に記載の非水電解質二次電池。
- 前記第1負極合材層における前記Si系活物質の含有割合は、5重量%~25重量%であり、
前記第2負極合材層における前記Si系活物質の含有割合は、15重量%未満である、請求項1又は2に記載の非水電解質二次電池。 - 前記負極の曲率半径の最小値は、1mm~5mmである、請求項1~3のいずれか1項に記載の非水電解質二次電池。
- 前記第1負極合材層及び前記第2負極合材層は、炭素系負極活物質を含む、請求項1~4のいずれか1項に記載の非水電解質二次電池。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018103824 | 2018-05-30 | ||
JP2018103824 | 2018-05-30 | ||
PCT/JP2019/017893 WO2019230298A1 (ja) | 2018-05-30 | 2019-04-26 | 非水電解質二次電池 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2019230298A1 JPWO2019230298A1 (ja) | 2021-06-10 |
JP7386432B2 true JP7386432B2 (ja) | 2023-11-27 |
Family
ID=68697511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2020521809A Active JP7386432B2 (ja) | 2018-05-30 | 2019-04-26 | 非水電解質二次電池 |
Country Status (5)
Country | Link |
---|---|
US (1) | US12009512B2 (ja) |
EP (1) | EP3813158A4 (ja) |
JP (1) | JP7386432B2 (ja) |
CN (1) | CN112204768A (ja) |
WO (1) | WO2019230298A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112542570B (zh) * | 2019-09-23 | 2022-08-09 | 北京小米移动软件有限公司 | 硅负极极片及其制备方法和锂离子电池 |
JPWO2021153441A1 (ja) * | 2020-01-31 | 2021-08-05 | ||
CN111613774A (zh) * | 2020-05-29 | 2020-09-01 | 珠海冠宇电池股份有限公司 | 一种负极片及其制备方法和应用 |
JPWO2022024712A1 (ja) * | 2020-07-31 | 2022-02-03 |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004311331A (ja) | 2003-04-10 | 2004-11-04 | Sony Corp | 電池 |
JP2005197080A (ja) | 2004-01-07 | 2005-07-21 | Nec Corp | 二次電池用負極およびそれを用いた二次電池 |
JP2005209496A (ja) | 2004-01-23 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 非水電解質二次電池 |
JP2007095569A (ja) | 2005-09-29 | 2007-04-12 | Sanyo Electric Co Ltd | リチウム二次電池 |
JP2010212228A (ja) | 2009-02-13 | 2010-09-24 | Hitachi Maxell Ltd | 非水二次電池 |
JP2013041742A (ja) | 2011-08-15 | 2013-02-28 | Toyota Industries Corp | 負極及び二次電池 |
JP2014035885A (ja) | 2012-08-09 | 2014-02-24 | Dainippon Printing Co Ltd | 二次電池用負極板、及び二次電池、並びに電池パック |
JP2014096201A (ja) | 2012-11-07 | 2014-05-22 | Toyota Industries Corp | 蓄電装置及び二次電池 |
JP2015191879A (ja) | 2014-03-31 | 2015-11-02 | 株式会社日立製作所 | 捲回型二次電池 |
US20150340732A1 (en) | 2014-05-21 | 2015-11-26 | Samsung Sdi Co., Ltd. | Electrode structure and lithium battery including the same |
WO2016035289A1 (ja) | 2014-09-05 | 2016-03-10 | 三洋電機株式会社 | 非水電解質二次電池用負極及び非水電解質二次電池 |
WO2017010046A1 (ja) | 2015-07-10 | 2017-01-19 | パナソニックIpマネジメント株式会社 | 捲回型電池 |
WO2017038041A1 (ja) | 2015-08-28 | 2017-03-09 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池 |
JP2018010764A (ja) | 2016-07-12 | 2018-01-18 | 株式会社村田製作所 | 電池、電池パック、電子機器、電動車両、蓄電装置および電力システム |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4497904B2 (ja) | 2003-12-04 | 2010-07-07 | 三洋電機株式会社 | リチウム二次電池及びその製造方法 |
JP4824394B2 (ja) * | 2004-12-16 | 2011-11-30 | パナソニック株式会社 | リチウムイオン二次電池用負極、その製造方法、およびそれを用いたリチウムイオン二次電池 |
US7662514B2 (en) * | 2005-11-17 | 2010-02-16 | Panasonic Corporation | Non-aqueous electrolyte secondary battery and method for producing negative electrode material for non-aqueous electrolyte secondary battery |
KR101058293B1 (ko) * | 2006-10-23 | 2011-08-22 | 주식회사 엘지화학 | 우수한 안전성을 발휘하는 전기화학소자 |
CN202495522U (zh) * | 2012-02-27 | 2012-10-17 | 宁德新能源科技有限公司 | 一种卷绕结构方形锂离子电池及其正极片 |
JP2013178913A (ja) | 2012-02-28 | 2013-09-09 | Hitachi Maxell Ltd | 非水電解液二次電池 |
-
2019
- 2019-04-26 JP JP2020521809A patent/JP7386432B2/ja active Active
- 2019-04-26 CN CN201980035918.0A patent/CN112204768A/zh active Pending
- 2019-04-26 WO PCT/JP2019/017893 patent/WO2019230298A1/ja unknown
- 2019-04-26 EP EP19811323.5A patent/EP3813158A4/en active Pending
- 2019-04-26 US US17/054,881 patent/US12009512B2/en active Active
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004311331A (ja) | 2003-04-10 | 2004-11-04 | Sony Corp | 電池 |
JP2005197080A (ja) | 2004-01-07 | 2005-07-21 | Nec Corp | 二次電池用負極およびそれを用いた二次電池 |
JP2005209496A (ja) | 2004-01-23 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 非水電解質二次電池 |
JP2007095569A (ja) | 2005-09-29 | 2007-04-12 | Sanyo Electric Co Ltd | リチウム二次電池 |
JP2010212228A (ja) | 2009-02-13 | 2010-09-24 | Hitachi Maxell Ltd | 非水二次電池 |
JP2013041742A (ja) | 2011-08-15 | 2013-02-28 | Toyota Industries Corp | 負極及び二次電池 |
JP2014035885A (ja) | 2012-08-09 | 2014-02-24 | Dainippon Printing Co Ltd | 二次電池用負極板、及び二次電池、並びに電池パック |
JP2014096201A (ja) | 2012-11-07 | 2014-05-22 | Toyota Industries Corp | 蓄電装置及び二次電池 |
JP2015191879A (ja) | 2014-03-31 | 2015-11-02 | 株式会社日立製作所 | 捲回型二次電池 |
US20150340732A1 (en) | 2014-05-21 | 2015-11-26 | Samsung Sdi Co., Ltd. | Electrode structure and lithium battery including the same |
WO2016035289A1 (ja) | 2014-09-05 | 2016-03-10 | 三洋電機株式会社 | 非水電解質二次電池用負極及び非水電解質二次電池 |
WO2017010046A1 (ja) | 2015-07-10 | 2017-01-19 | パナソニックIpマネジメント株式会社 | 捲回型電池 |
WO2017038041A1 (ja) | 2015-08-28 | 2017-03-09 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池 |
JP2018010764A (ja) | 2016-07-12 | 2018-01-18 | 株式会社村田製作所 | 電池、電池パック、電子機器、電動車両、蓄電装置および電力システム |
Also Published As
Publication number | Publication date |
---|---|
WO2019230298A1 (ja) | 2019-12-05 |
US20210218019A1 (en) | 2021-07-15 |
EP3813158A4 (en) | 2021-08-04 |
JPWO2019230298A1 (ja) | 2021-06-10 |
US12009512B2 (en) | 2024-06-11 |
CN112204768A (zh) | 2021-01-08 |
EP3813158A1 (en) | 2021-04-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7386432B2 (ja) | 非水電解質二次電池 | |
JP7159156B2 (ja) | 非水電解質二次電池用負極及び非水電解質二次電池 | |
US20200365878A1 (en) | Negative electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery | |
WO2019230296A1 (ja) | 非水電解質二次電池 | |
JP7394327B2 (ja) | 二次電池 | |
WO2021132115A1 (ja) | 二次電池用電極、及び二次電池 | |
JP7457921B2 (ja) | 巻回型非水電解質二次電池 | |
WO2023053773A1 (ja) | リチウムイオン二次電池 | |
WO2022176650A1 (ja) | 非水電解質二次電池用負極、及び非水電解質二次電池 | |
WO2019230297A1 (ja) | 非水電解質二次電池 | |
WO2021241027A1 (ja) | 非水電解質二次電池用正極活物質および非水電解質二次電池 | |
WO2020090410A1 (ja) | 二次電池 | |
WO2023032558A1 (ja) | 二次電池用負極および二次電池 | |
WO2023068229A1 (ja) | 非水電解質二次電池用正極及び非水電解質二次電池 | |
JP7301267B2 (ja) | 非水電解質二次電池 | |
WO2023189467A1 (ja) | 非水電解質二次電池用負極活物質及び非水電解質二次電池 | |
WO2022196445A1 (ja) | 非水電解質二次電池 | |
CN113632256B (zh) | 二次电池 | |
WO2023162710A1 (ja) | 円筒形の非水電解質二次電池 | |
WO2024111410A1 (ja) | 円筒形の非水電解質二次電池 | |
WO2023163139A1 (ja) | 円筒形の非水電解質二次電池 | |
WO2022163618A1 (ja) | 非水電解質二次電池 | |
WO2023032445A1 (ja) | 非水電解液二次電池 | |
WO2024024364A1 (ja) | 非水電解質二次電池用正極活物質および非水電解質二次電池 | |
WO2023182170A1 (ja) | 円筒形非水電解質二次電池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201028 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220407 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230509 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230706 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20231003 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20231030 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 7386432 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |