WO2022270142A1 - 電池 - Google Patents
電池 Download PDFInfo
- Publication number
- WO2022270142A1 WO2022270142A1 PCT/JP2022/018146 JP2022018146W WO2022270142A1 WO 2022270142 A1 WO2022270142 A1 WO 2022270142A1 JP 2022018146 W JP2022018146 W JP 2022018146W WO 2022270142 A1 WO2022270142 A1 WO 2022270142A1
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- WO
- WIPO (PCT)
- Prior art keywords
- active material
- counter electrode
- electrode active
- current collector
- electrode current
- Prior art date
Links
- 239000007772 electrode material Substances 0.000 claims abstract description 218
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 86
- 239000007773 negative electrode material Substances 0.000 claims description 15
- 239000007774 positive electrode material Substances 0.000 claims description 14
- 239000010410 layer Substances 0.000 description 463
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 11
- 229910001416 lithium ion Inorganic materials 0.000 description 11
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
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- 239000000758 substrate Substances 0.000 description 4
- -1 Li 2 S—SiS 2 Chemical compound 0.000 description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 230000014509 gene expression Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000005279 LLTO - Lithium Lanthanum Titanium Oxide Substances 0.000 description 1
- 229910018091 Li 2 S Inorganic materials 0.000 description 1
- 229910018111 Li 2 S-B 2 S 3 Inorganic materials 0.000 description 1
- 229910018127 Li 2 S-GeS 2 Inorganic materials 0.000 description 1
- 229910018133 Li 2 S-SiS 2 Inorganic materials 0.000 description 1
- 229910018119 Li 3 PO 4 Inorganic materials 0.000 description 1
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- NXPZICSHDHGMGT-UHFFFAOYSA-N [Co].[Mn].[Li] Chemical compound [Co].[Mn].[Li] NXPZICSHDHGMGT-UHFFFAOYSA-N 0.000 description 1
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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- 239000001989 lithium alloy Substances 0.000 description 1
- 229910000664 lithium aluminum titanium phosphates (LATP) Inorganic materials 0.000 description 1
- GLNWILHOFOBOFD-UHFFFAOYSA-N lithium sulfide Chemical compound [Li+].[Li+].[S-2] GLNWILHOFOBOFD-UHFFFAOYSA-N 0.000 description 1
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- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
-
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
-
- 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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat 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
- H01M4/64—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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/591—Covers
-
- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
-
- 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
Definitions
- This disclosure relates to batteries.
- Patent document 1 and patent document 2 disclose a battery provided with an insulating member.
- an object of the present disclosure is to provide a highly reliable battery.
- a battery includes an electrode current collector, two electrode active material layers arranged on both main surfaces of the electrode current collector, and the electrodes of each of the two electrode active material layers.
- Two solid electrolyte layers arranged on the opposite side of the current collector, two counter electrode active material layers arranged on the opposite side of each of the two solid electrolyte layers from the electrode active material layer,
- Two counter electrode current collectors arranged on the opposite side of the solid electrolyte layer of each of the two counter electrode active material layers, the two counter electrode current collectors, the two counter electrode active material layers, the two solid an electrolyte layer; and a first insulating layer covering a side surface of each of the two electrode active material layers.
- First regions that are not covered with either of the two electrode active material layers are provided at the ends of both main surfaces of the electrode current collector.
- Each of the two counter electrode active material layers is provided with a second region, which is not covered with any of the two counter electrode current collectors, at the end of the main surface on the side of the counter electrode current collector.
- the first insulating layer covers the second region.
- the electrode current collector protrudes from the outer surface of the first insulating layer.
- FIG. 1 is a schematic top view showing an example of a battery according to Embodiment 1.
- FIG. FIG. 2 is a schematic cross-sectional view of the battery according to Embodiment 1 at the position indicated by line II-II in FIG. 3 is a schematic cross-sectional view of a battery according to Modification 1 of Embodiment 1.
- FIG. 4 is a schematic top view of a battery according to Modification 2 of Embodiment 1.
- FIG. FIG. 5 is a schematic cross-sectional view of a battery according to Modification 2 of Embodiment 1, taken along the line VV in FIG.
- FIG. 6 is a flow chart showing a method for manufacturing a battery according to Embodiment 1.
- FIG. 7 is a schematic cross-sectional view showing an example of a battery according to Embodiment 2.
- FIG. 8A is a flowchart showing an example of a method for manufacturing a battery according to Embodiment 2.
- FIG. 8B is a flowchart showing another example of the method for manufacturing the battery according to Embodiment 2.
- FIG. 8A is a flowchart showing an example of a method for manufacturing a battery according to Embodiment 2.
- FIG. 8B is a flowchart showing another example of the method for manufacturing the battery according to Embodiment 2.
- the present inventors have studied forming terminals at the ends of a battery, such as an all-solid-state battery having a solid electrolyte layer containing a solid electrolyte, in order to extract current. Specifically, when the electrode active material layers are formed on both sides of the same electrode current collector, it is preferable to form the terminal in the region not covered with the electrode active material layer at the end of the electrode current collector. Tried.
- the inventors have found that if the counter electrode current collector protrudes from the counter electrode active material layer, there is a problem that end surface short-circuiting is likely to occur due to contact with the electrode current collector. In addition, when stacking a plurality of unit cells, there is a problem that the possibility of end surface short circuiting increases due to positional deviation of the stacked cells. In addition, when the end of the active material layer is exposed, there is also a problem that a short circuit is likely to occur due to falling off of the active material. Such problems reduce the reliability of the battery.
- the present disclosure provides a highly reliable battery.
- a battery includes an electrode current collector, two electrode active material layers arranged on both main surfaces of the electrode current collector, and the electrodes of each of the two electrode active material layers.
- Two solid electrolyte layers arranged on the opposite side of the current collector, two counter electrode active material layers arranged on the opposite side of each of the two solid electrolyte layers from the electrode active material layer,
- Two counter electrode current collectors arranged on the opposite side of the solid electrolyte layer of each of the two counter electrode active material layers, the two counter electrode current collectors, the two counter electrode active material layers, the two solid an electrolyte layer; and a first insulating layer covering a side surface of each of the two electrode active material layers.
- First regions that are not covered with either of the two electrode active material layers are provided at the ends of both main surfaces of the electrode current collector.
- Each of the two counter electrode active material layers is provided with a second region, which is not covered with any of the two counter electrode current collectors, at the end of the main surface on the side of the counter electrode current collector.
- the first insulating layer covers the second region.
- the electrode current collector protrudes from the outer surface of the first insulating layer.
- the counter electrode current collector is set back from the counter electrode active material layer, end face short circuits due to contact between the counter electrode current collector and the electrode active material layer or the electrode current collector are less likely to occur. Moreover, exposure of the electrode active material layer and the counter electrode active material layer is suppressed by forming the first insulating layer. Therefore, breakage or short-circuiting due to contact between the electrode active material layer and the counter electrode active material layer and other members is less likely to occur. Therefore, the reliability of the battery can be improved.
- the length of the second region on a straight line connecting a point on the outer edge of the battery and the center of the battery and intersecting the second region may be 100 ⁇ m or more.
- the length of the first region on a straight line connecting a point on the outer edge of the battery and the center of the battery and intersecting the first region may be 1 mm or more.
- terminals can be easily formed in the regions not covered by the electrode active material layer at the ends of the electrode current collector.
- the connection between the terminal and the electrode current collector can be improved, and the connection resistance can be reduced. By reducing the connection resistance, the large-current characteristics of the battery are improved, and, for example, rapid charging becomes possible.
- the thickness of the portion of the first insulating layer covering the second region may be greater than the thickness of the counter electrode current collector.
- the electrode active material layer may contain a negative electrode active material
- the counter electrode active material layer may contain a positive electrode active material. That is, the electrode current collector and the electrode active material layer are the negative electrode current collector and the negative electrode active material layer, respectively, and the counter electrode current collector and the counter electrode active material layer are the positive electrode current collector and the positive electrode active material layer, respectively. good too.
- the region of the positive electrode active material layer that is covered by the positive electrode current collector and functions as the positive electrode becomes smaller than that of the negative electrode active material layer. Therefore, the capacity of the negative electrode active material layer tends to be larger than the capacity of the positive electrode active material layer. Therefore, deposition of metal derived from metal ions that have not been taken into the negative electrode active material layer is suppressed, and the reliability of the battery can be further improved.
- the first insulating layer may contain resin.
- the resin contained in the first insulating layer bites into each of the electrode current collector, the counter electrode current collector, the electrode active material layer, and the counter electrode active material layer, thereby causing the first insulating layer, each current collector, and each Bondability with the active material layer can be improved, and peeling of the first insulating layer from the current collector and the active material layer can be suppressed.
- the first insulating layer may contain a metal oxide.
- the first insulating layer becomes hard, so that even if the first insulating layer is formed to be thin when manufacturing the battery, the first insulating layer is not easily deformed, and a thin first insulating layer with a uniform thickness can be formed. .
- the solid electrolyte layer may contain a solid electrolyte having lithium ion conductivity.
- the reliability of the lithium-ion battery containing the solid electrolyte can be improved.
- the battery may have a rectangular shape in plan view, and the first insulating layer may be provided on at least one side of the battery in plan view.
- the sides where terminals are not formed can, for example, be cut all at once, making it possible to manufacture batteries efficiently.
- the side surface of the side on which the first insulating layer is not provided may be a cut surface.
- the side surface of the battery is the cut surface
- the side surface of the electrode layer, the side surface of the counter electrode layer, and the side surface of the solid electrolyte layer can be easily made flush with each other.
- the shape of the cut surface may be rectangular or trapezoidal.
- the edge of the cut surface becomes a straight line. Therefore, there is no space that does not contribute to the charge/discharge performance of the battery formed due to non-straight ends, and a substantial reduction in the energy density of the battery can be suppressed. Therefore, the energy density of the battery can be increased.
- the electrode current collector, the two electrode active material layers, the two solid electrolyte layers, the two counter electrode active material layers, and the two counter electrode current collectors constitute a unit cell, and the A plurality of unit cells may be stacked.
- At least one of the plurality of counter electrode current collectors may protrude from the outer surface of the second insulating layer.
- a counter electrode terminal for extracting the current of the counter electrode layer is formed in the region not covered with the second insulating layer of the counter electrode current collector excluding the outermost shell of the laminated battery. easier to do.
- exposure of the electrode active material layer and the counter electrode active material layer is suppressed on the side surface where the counter electrode current collector protrudes. Therefore, breakage or short-circuiting due to contact between the electrode active material layer and the counter electrode active material layer and other members is less likely to occur. Therefore, the reliability of the battery can be improved.
- each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, scales and the like do not necessarily match in each drawing. Moreover, in each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified.
- the x-axis, y-axis and z-axis indicate three axes of a three-dimensional orthogonal coordinate system.
- the x-axis and the y-axis are directions parallel to the first side of the rectangle and the second side orthogonal to the first side, respectively, when the power generating element of the battery has a rectangular shape in plan view.
- the z-axis is the stacking direction of a plurality of unit cells included in the power generation element.
- the “stacking direction” corresponds to the direction normal to the main surfaces of the current collector and the active material layer.
- plane view means when viewed from a direction perpendicular to the main surface.
- the terms “upper” and “lower” do not refer to the upward direction (vertically upward) and the downward direction (vertically downward) in absolute spatial recognition, but are based on the stacking order in the stacking structure. It is used as a term defined by a relative positional relationship. Also, the terms “above” and “below” are used only when two components are spaced apart from each other and there is another component between them, as well as when two components are spaced apart from each other. It also applies when two components are in contact with each other and are placed in close contact with each other. In the following description, the negative side of the z-axis is called “lower” or “lower”, and the positive side of the z-axis is called “upper” or “upper”.
- protruding means protruding outward from the center of the unit cell in a cross-sectional view perpendicular to the main surface of the unit cell.
- element A protrudes from element B means that the tip of element A protrudes from the tip of element B in the direction of protrusion, that is, the tip of element A protrudes from the tip of element B by a unit It means away from the center of the cell.
- a “protrusion direction” is regarded as a direction parallel to the main surface of the unit cell.
- the “protruding portion of the element A” means a part of the element A that protrudes from the tip of the element B in the direction of protrusion.
- Elements are, for example, electrode layers, active material layers, solid electrolyte layers, current collectors, and the like.
- ordinal numbers such as “first” and “second” do not mean the number or order of components, unless otherwise specified, to avoid confusion between components of the same kind and to distinguish them. It is used for the purpose of
- FIG. 1 is a schematic top view showing an example of a battery 1 according to this embodiment.
- the plan view shape of each component of the battery 1 is indicated by solid lines and dashed lines.
- FIG. 2 is a schematic cross-sectional view of battery 1 according to the present embodiment, taken along line II-II in FIG.
- battery 1 As shown in FIGS. 1 and 2, battery 1 according to the present embodiment includes electrode layer 10, counter electrode layer 20 disposed opposite electrode layer 10, and electrode layer 10 and counter electrode layer 20. and a solid electrolyte layer 30 positioned between. Battery 1 includes two counter electrode layers 20 and two solid electrolyte layers 30 . One each of counter electrode layer 20 and solid electrolyte layer 30 is arranged on both main surfaces of electrode layer 10 . The electrode layer 10 , two counter electrode layers 20 and two solid electrolyte layers 30 constitute a unit cell 2 .
- the electrode layer 10 has an electrode current collector 11 and an electrode active material layer 12 located between the electrode current collector 11 and the solid electrolyte layer 30 .
- the electrode layer 10 has two electrode active material layers 12 .
- the two electrode active material layers 12 are arranged on both major surfaces of the electrode current collector 11 .
- a region 51 a that is not covered with the upper electrode active material layer 12 is provided at the end of the main surface 11 a of the electrode current collector 11 .
- a region 51b that is not covered with the lower electrode active material layer 12 is provided at the end of the main surface 11b of the electrode current collector 11 .
- Regions 51a and 51b are examples of first regions that are not covered with any of the two electrode active material layers 12, respectively.
- the counter electrode layer 20 has a counter electrode current collector 21 and a counter electrode active material layer 22 positioned between the counter electrode current collector 21 and the solid electrolyte layer 30 .
- a region 52 a that is not covered with the upper counter electrode current collector 21 is provided at the end of the main surface 22 a of the upper counter electrode active material layer 22 .
- a region 52b not covered with the lower counter electrode current collector 21 is provided at the end of the main surface 22b of the lower counter electrode active material layer 22 .
- Regions 52 a and 52 b are examples of second regions that are not covered with any of the two counter electrode current collectors 21 .
- the battery 1 further includes an insulating layer 40 that covers the side surfaces of the two electrode active material layers 12 , the two solid electrolyte layers 30 , the two counter electrode active material layers 22 and the two counter electrode current collectors 21 .
- the insulating layer 40 is an example of a first insulating layer. Specifically, as shown in FIG. 2, the insulating layer 40 includes the side surfaces 21c of each of the two counter electrode current collectors 21, the side surfaces 22c of each of the two counter electrode active material layers 22, and the two solid electrolyte layers 30. and the side surfaces 12c of each of the two electrode active material layers 12 .
- sides 21c, 22c, 30c and 12c are completely covered with insulating layer 40 and are not exposed.
- Sides 21c, 22c, 30c and 12c are each, for example, flat planes.
- the side surfaces 22c, 30c and 12c are, for example, flush, that is, form the same flat plane without steps.
- the electrode current collector 11 has both a region covered with the insulating layer 40 and a region not covered. In other words, the electrode current collector 11 protrudes from the outer surface 40 c of the insulating layer 40 . That is, the electrode current collector 11 has the projecting portion 13 projecting outward from the outer surface 40c. In the region of the electrode current collector 11 not covered with the insulating layer 40, it is easy to form an electrode terminal for taking out the current of the electrode layer 10.
- the plan view shape of the battery 1 is rectangular as shown in FIG. 1, but is not limited to this.
- the planar shape of the battery 1 may be a polygon such as a square, hexagon or octagon, or may be circular or elliptical.
- the battery 1 has sides 1c and 1d facing each other and sides 1e and 1f facing each other. Sides 1c and 1d form short sides of rectangular battery 1 in plan view. The side surfaces 1e and 1f form long sides of the rectangular battery 1 in plan view. As shown in FIG. 1 , the side surface 1 c of the battery 1 is composed of the side surface 11 c of the electrode current collector 11 and the outer surface 40 c of the insulating layer 40 .
- the electrode current collector 11 has a structure in which the protrusion 13 protrudes from the outer surface 40c of the insulating layer 40 on the side 1c side, but the protrusion 13 may be on the side 1d side. , the side surface 1e side or the side surface 1f side.
- the battery 1 is, for example, an all solid state battery. Moreover, the side surfaces 1d, 1e and 1f of the electrode current collector 11 of the battery 1, which do not have the projecting portion 13, are flat planes. In each flat side surface, the side surface of the electrode layer 10, the side surface of the counter electrode layer 20, and the side surface of the solid electrolyte layer 30 are flush with each other. To position. As a result, on the side surface of the electrode current collector 11 of the battery 1 that does not have the protruding portion 13 , there is no step on the side surface of each layer, and unevenness does not exist. For this reason, spaces that do not function as a battery due to unevenness are not formed, and the substantial volumetric energy density of the battery 1 is improved. In addition, since the side surfaces of the layers can be made flush by cutting the layers together, manufacturing of the battery 1 is facilitated.
- the side surfaces 1d, 1e, and 1f of the electrode current collector 11 of the battery 1 that do not have the projecting portion 13 are, for example, cut surfaces.
- the side surfaces 1d, 1e and 1f are surfaces formed by cutting with a blade such as a cutter.
- the side surfaces 1d, 1e and 1f each have cut marks such as fine grooves. Since each side surface is a cut surface, the side surface of the electrode layer 10, the side surface of the counter electrode layer 20, and the side surface of the solid electrolyte layer 30 can be easily flushed. Note that the cut marks may be smoothed by polishing or the like.
- the planar view shape of the cut surface is not limited, in the case of the battery 1, it is rectangular.
- the cut surface is, for example, parallel to the stacking direction (z-axis direction) of the battery 1 .
- the electrode current collector 11 is in contact with the electrode active material layer 12 on both main surfaces 11a and 11b.
- regions 51a and 51b that are not covered with the electrode active material layer 12 are provided at the ends of at least one side of the electrode current collector 11 in plan view.
- the region 51a has both a region covered with the insulating layer 40 and a region not covered with the insulating layer 40 .
- a region not covered with the insulating layer 40 corresponds to the projecting portion 13 in plan view.
- the region 51b on the lower surface side also has the same configuration.
- the length of the region 51a is, for example, 1 mm or more in order to facilitate the formation of a terminal in the region 51a not covered with the electrode active material layer 12 at the end of the electrode current collector 11. Also, for example, the length of the region 51a is 20 mm or less. As a result, it is possible to reduce the portion that does not function as a battery by preventing the terminal portion from becoming too large, so that the volume energy density of the battery 1 can be improved.
- the length of the region 51a is the length of a straight line connecting a point on the outer edge of the battery 1 and the center of the battery 1 and intersecting the region 51a in plan view.
- one point on the outer edge is a point on the side surface 11c of the electrode current collector 11 in plan view.
- the center of the battery 1 is the geometric center of the battery 1 in plan view.
- the center of the battery 1 is the intersection of diagonal lines in plan view.
- a straight line that connects a point on the outer edge of the battery 1 and the center of the battery 1 and crosses the region 51a is, for example, line II-II shown in FIG. That is, the length of the region 51a is the length along the x-axis direction.
- the area 51a is a rectangular area elongated in the y-axis direction, but is not limited to this.
- the length of the region 51a is equal to the length of the region 51b, it is not limited to this.
- the length of the region 51a and the length of the region 51b may be different.
- the thickness of the electrode current collector 11 is, for example, 5 ⁇ m or more and 100 ⁇ m or less, but is not limited to this range.
- a known material can be used as the material of the electrode current collector 11 .
- the electrode current collector 11 for example, copper, aluminum, nickel, iron, stainless steel, platinum, gold, or an alloy of two or more of these may be used. be done.
- the upper counter electrode current collector 21 is in contact with the main surface 22 a of the counter electrode active material layer 22 .
- a region 52a that does not cover the main surface 22a of the counter electrode active material layer 22 is provided at the end of at least one side of the counter electrode current collector 21 in plan view. That is, the side surface of the counter electrode current collector 21 recedes with respect to the counter electrode active material layer 22 .
- side surface 21c of counter electrode current collector 21 is closer to the center of battery 1 than side surface 22c of counter electrode active material layer 22 in plan view.
- the length of the region 52a is, for example, 100 ⁇ m or more. Also, for example, the length of the region 52a is 2 mm or less. As a result, the area of the counter electrode current collector 21 is prevented from becoming too small, and the portion functioning as a battery can be sufficiently secured, and the volumetric energy density of the battery 1 can be improved.
- the length of the region 52a is the length of a straight line that connects a point on the outer edge of the battery 1 and the center of the battery 1 and intersects the region 52a in plan view.
- a point on the outer edge, the center, and a straight line intersecting region 52a are the same as in region 51a. That is, the length of the region 52a is, for example, the length along the II-II line shown in FIG. 1 and the length along the x-axis direction.
- the area 52a is a rectangular area elongated in the y-axis direction, but is not limited to this.
- the length of the region 52a is equal to the length of the region 52b, it is not limited to this.
- the length of region 52a and the length of region 52b may be different.
- the recessed side surface 21c of the counter electrode current collector 21 is in contact with the portion of the insulating layer 40 covering the region 52a.
- the upper surface of the upper counter electrode current collector 21 and the upper surface of the insulating layer 40 are flush with each other.
- the lower surface of the lower counter electrode current collector 21 and the lower surface of the insulating layer 40 are flush with each other.
- the thickness of the counter electrode current collector 21 is, for example, 5 ⁇ m or more and 100 ⁇ m or less, but is not limited to this range.
- a known material can be used as the material of the counter electrode current collector 21 .
- the counter electrode current collector 21 for example, a foil-shaped body, a plate-shaped body, or a mesh-shaped body made of copper, aluminum, nickel, iron, stainless steel, platinum, gold, or an alloy of two or more of these is used. be done.
- the electrode active material layer 12 is arranged on both main surfaces 11 a and 11 b of the electrode current collector 11 .
- the surface of the electrode active material layer 12 opposite to the electrode current collector 11 is in contact with the solid electrolyte layer 30 .
- the electrode active material layer 12 and the counter electrode active material layer 22 face each other with the solid electrolyte layer 30 interposed therebetween.
- a side surface 12 c of the electrode active material layer 12 is in contact with the insulating layer 40 .
- the electrode active material layer 12 and the counter electrode active material layer 22 have the same shape and position.
- the thickness of the electrode active material layer 12 is, for example, 5 ⁇ m or more and 300 ⁇ m or less. Materials used for the electrode active material layer 12 will be described later.
- the counter electrode active material layer 22 is laminated on the solid electrolyte layer 30 and arranged to face the electrode active material layer 12 .
- the surface of the counter electrode active material layer 22 opposite to the solid electrolyte layer 30 is in contact with the counter electrode current collector 21 .
- the counter electrode active material layer 22 has a region 52a or 52b that is not in contact with the counter electrode current collector 21 at the end of at least one side of the counter electrode active material layer 22 in plan view.
- the thickness of the counter electrode active material layer 22 is, for example, 5 ⁇ m or more and 300 ⁇ m or less. Materials used for the counter electrode active material layer 22 will be described later.
- the solid electrolyte layer 30 is located between the electrode active material layer 12 and the counter electrode active material layer 22 .
- the thickness of the solid electrolyte layer 30 is, for example, 5 ⁇ m or more and 150 ⁇ m or less, but is not limited to this range.
- the solid electrolyte layer 30 contains at least a solid electrolyte and, if necessary, may contain a binder material.
- the solid electrolyte layer 30 may contain a solid electrolyte having lithium ion conductivity.
- a known material such as a lithium ion conductor, a sodium ion conductor, or a magnesium ion conductor can be used as the solid electrolyte.
- a solid electrolyte material such as a sulfide solid electrolyte, a halogen-based solid electrolyte, or an oxide solid electrolyte is used as the solid electrolyte.
- a sulfide solid electrolyte in the case of a material capable of conducting lithium ions, for example, a composite of lithium sulfide (Li 2 S) and phosphorus pentasulfide (P 2 S 5 ) is used.
- a sulfide such as Li 2 S—SiS 2 , Li 2 S—B 2 S 3 or Li 2 S—GeS 2 may be used.
- a sulfide to which at least one of 3 N, LiCl, LiBr, Li 3 PO 4 and Li 4 SiO 4 is added may be used.
- the oxide solid electrolyte in the case of a material capable of conducting lithium ions, for example, Li 7 La 3 Zr 2 O 12 (LLZ), Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) Alternatively, (La, Li) TiO 3 (LLTO) or the like is used.
- LLZ Li 7 La 3 Zr 2 O 12
- LATP Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3
- (La, Li) TiO 3 (LLTO) or the like is used.
- binder material for example, elastomers are used, and organic compounds such as polyvinylidene fluoride, acrylic resin, or cellulose resin may be used.
- the insulating layer 40 is formed so that the side surface 12c of the electrode active material layer 12 and the side surface 30c of the solid electrolyte layer 30 are located in the direction in which the projecting portion 13 exists in plan view. , the side surface 22 c of the counter electrode active material layer 22 and the side surface 21 c of the counter electrode current collector 21 . Moreover, the main surfaces 11a and 11b of the electrode current collector 11 are partially covered.
- the insulating layer 40 contains, for example, at least one of resin and metal oxide.
- resins include silicone resins, epoxy resins, acrylic resins, polyimide resins, and the like.
- the resin may be a thermosetting resin or a UV curable resin. Since the insulating layer 40 contains a resin, each layer is And the bondability of the insulating layer 40 to each current collector can be improved.
- metal oxides include silicon oxide, titanium oxide, and aluminum oxide. Insulating layer 40 becomes hard by containing metal oxide. Therefore, even if the insulating layer 40 is formed thin when the battery 1 is manufactured, the insulating layer 40 is not easily deformed, and a thin insulating layer 40 having a uniform thickness can be formed.
- one of the electrode layer 10 including the electrode active material layer 12 and the counter electrode layer 20 including the counter electrode active material layer 22 is a positive electrode layer including a positive electrode active material layer, and the other is a negative electrode active material layer.
- a negative electrode layer comprising a layer.
- the electrode layer 10 is a negative electrode layer and the counter electrode layer 20 is a positive electrode layer. That is, the electrode current collector 11 is the negative electrode current collector, and the electrode active material layer 12 is the negative electrode active material layer.
- the counter electrode current collector 21 is a positive electrode current collector, and the counter electrode active material layer 22 is a positive electrode active material layer.
- the positive electrode active material layer contains at least a positive electrode active material and, if necessary, may contain at least one of a solid electrolyte, a conductive aid and a binder material.
- the positive electrode active material known materials that can occlude and release (for example, intercalate and deintercalate, or dissolve and precipitate) lithium ions, sodium ions, or magnesium ions can be used.
- the positive electrode active material in the case of a material that can desorb and insert lithium ions, examples include lithium cobaltate composite oxide (LCO), lithium nickelate composite oxide (LNO), lithium manganate composite oxide (LMO), ), lithium-manganese-nickel composite oxide (LMNO), lithium-manganese-cobalt composite oxide (LMCO), lithium-nickel-cobalt composite oxide (LNCO) or lithium-nickel-manganese-cobalt composite oxide (LNMCO ) are used.
- LCO lithium cobaltate composite oxide
- LNO lithium nickelate composite oxide
- LMO lithium manganate composite oxide
- LMNO lithium-manganese-nickel composite oxide
- LMCO lithium-manganese-cobalt composite oxide
- LNCO lithium-nickel-
- the above solid electrolyte material can be used as the solid electrolyte.
- Conductive materials such as acetylene black, carbon black, graphite, and carbon fiber are used as conductive aids.
- the binder material the binder material described above can be used.
- the negative electrode active material layer contains at least a negative electrode active material, and if necessary, may contain at least one of the same solid electrolyte, conductive aid, and binder material as the positive electrode active material layer.
- the negative electrode active material known materials that can occlude and release (for example, intercalate and deintercalate, or dissolve and precipitate) lithium ions, sodium ions, or magnesium ions can be used.
- the negative electrode active material in the case of materials capable of desorbing and inserting lithium ions, examples include carbon materials such as natural graphite, artificial graphite, graphite carbon fiber or resin-baked carbon, metallic lithium, lithium alloys, or lithium and transition metals. An oxide with an element or the like is used.
- regions 51 a and 51 b not covered with the electrode active material layer 12 are provided at the respective ends of the main surfaces 11 a and 11 b of the electrode current collector 11 .
- a region 52 a not covered with the upper counter electrode current collector 21 is provided at the end of the main surface 22 a of the upper counter electrode active material layer 22 .
- a region 52b not covered with the lower counter electrode current collector 21 is provided at the end of the main surface 22b of the lower counter electrode active material layer 22 .
- Battery 1 further includes insulating layer 40 covering side surface 21 c of counter electrode current collector 21 , side surface 22 c of counter electrode active material layer 22 , side surface 30 c of solid electrolyte layer 30 , and side surface 12 c of electrode active material layer 12 .
- the electrode current collector 11 protrudes from the outer surface 40 c of the insulating layer 40 .
- the counter electrode current collector 21 is set back from the counter electrode active material layer 22 , end face short circuits due to contact between the counter electrode current collector 21 and the electrode active material layer 12 or the electrode current collector 11 are less likely to occur.
- exposure of the electrode active material layer 12 and the counter electrode active material layer 22 is suppressed by providing the insulating layer 40 . Therefore, breakage, short circuit, or the like due to contact between the electrode active material layer 12 and the counter electrode active material layer 22 and other members is less likely to occur. Therefore, the reliability of the battery 1 can be improved.
- the length of the region 52a at the end of the counter electrode active material layer 22, which is not covered with the counter electrode current collector 21 is set to 100 ⁇ m or more, even if the counter electrode current collector 21 is damaged, the counter electrode active material layer 22 can be It becomes difficult to protrude from the material layer 22 . As a result, end face short circuits due to contact with the electrode active material layer 12 or the electrode current collector 11 are less likely to occur. Therefore, the reliability of the battery can be improved.
- the terminal can be easily formed using this region 51a. .
- the electrode layer 10 is a negative electrode layer and the counter electrode layer 20 is a positive electrode layer
- the region of the positive electrode active material layer that is covered by the positive electrode current collector and functions as the positive electrode is smaller than the negative electrode active material layer. This makes it easier for the capacity of the negative electrode active material layer to be greater than the capacity of the positive electrode active material layer. Therefore, deposition of metal derived from metal ions that have not been taken into the negative electrode active material layer is suppressed, and the reliability of the battery 1 can be further improved.
- FIG. 3 is a schematic cross-sectional view of a battery 1A according to this modification.
- a battery 1A shown in FIG. 3 differs from the battery 1 shown in FIG. 2 in that an insulating layer 40A is provided instead of the insulating layer 40.
- the thickness t2 of the portion of the insulating layer 40A covering the region 52a is greater than the thickness t1 of the counter electrode current collector 21.
- the insulating layer 40A covers the edge of the upper surface of the upper counter electrode current collector 21 .
- the thickness t2 of the portion of the insulating layer 40A covering the region 52a is made larger than the thickness t1 of the counter electrode current collector 21, even if the counter electrode current collector 21 is damaged, the counter electrode is It becomes difficult to protrude from the active material layer 22 . As a result, end surface short-circuiting due to contact between the counter electrode current collector 21 and the electrode active material layer 12 or the electrode current collector 11 is less likely to occur. Therefore, the reliability of battery 1A can be improved.
- the lower counter electrode current collector 21 is less likely to protrude from the counter electrode active material layer 22 in a plan view, so that short-circuiting due to contact with the electrode active material layer 12 or the electrode current collector 11 is less likely to occur. Therefore, the reliability of battery 1A can be improved.
- the thickness t2 of the insulating layer 40A may not be large on one of the upper and lower sides.
- the lower surface of the lower counter electrode current collector 21 and the lower surface of the insulating layer 40A may be flush with each other as in the first embodiment.
- FIG. 4 is a schematic top view of a battery 1B according to this modified example.
- the plan view shape of each component of the battery 1B is indicated by solid lines and dashed lines.
- FIG. 5 is a schematic cross-sectional view of a battery 1B according to this modification, taken along the line VV in FIG.
- battery 1B differs from battery 1 of Embodiment 1 in that electrode layer 10B and counter electrode layer 20B are provided instead of electrode layer 10 and counter electrode layer 20. do. Moreover, the battery 1B further includes an insulating layer 41 .
- the electrode layer 10B includes an electrode current collector 11B instead of the electrode current collector 11.
- Electrode current collector 11B protrudes from outer surface 40c of insulating layer 40 and outer surface 41d of insulating layer 41 on two sides of battery 1B. That is, the electrode current collector 11B has the projecting portion 13 on the side surface 1c side and the projecting portion 14 on the side surface 1d side.
- a specific configuration of the projecting portion 14 is the same as that of the projecting portion 13 .
- a region 53a not covered with the upper electrode active material layer 12 is provided at the end of the main surface 11a of the electrode current collector 11B.
- a region 53b that is not covered with the lower electrode active material layer 12 is provided at the end of the main surface 11b of the electrode current collector 11B.
- Regions 53 a and 53 b are examples of first regions that are not covered with any of the two electrode active material layers 12 .
- the lengths of regions 53a and 53b are, for example, the same as the lengths of regions 51a and 51b, but may be different.
- the counter electrode layer 20B includes a counter electrode current collector 21B instead of the counter electrode current collector 21.
- Counter electrode current collector 21B is recessed from each of side surfaces 22c and 22d of counter electrode active material layer 22 on two sides of battery 1B. Specifically, on the side surface 21d side of the counter electrode current collector 21B, a region 54a not covered with the upper counter electrode current collector 21B is provided at the end of the main surface 22a of the upper counter electrode active material layer 22. ing. A region 54b not covered with the lower counter electrode current collector 21B is provided at the end of the main surface 22b of the lower counter electrode active material layer 22 on the side surface 21d side. Regions 54a and 54b are examples of second regions that are not covered with any of the two counter electrode current collectors 21B. The lengths of regions 54a and 54b are, for example, the same as the lengths of regions 52a and 52b, but may be different.
- the insulating layer 41 is an example of a second insulating layer.
- the insulating layer 41 includes a side surface 21d of each of the two counter electrode current collectors 21B, a side surface 22d of each of the two counter electrode active material layers 22, a side surface 30d of each of the two solid electrolyte layers 30, and two electrode active material layers. 12 covering each side 12d.
- side surfaces 21d, 22d, 30d and 12d are completely covered with insulating layer 41 and are not exposed.
- Sides 21d, 22d, 30d and 12d are each, for example, flat planes.
- the side surfaces 22d, 30d and 12d are, for example, flush, that is, form the same flat plane without steps.
- the insulating layer 41 may be formed integrally with the insulating layer 40 .
- an insulating layer is provided to cover the side surfaces 1e and 1f of the battery 1, and may be connected to the insulating layers 40 and 41 and formed integrally.
- the battery 1B not only the insulating layer 40 but also the side surface 21d of the counter electrode current collector 21B, the side surface 22d of the counter electrode active material layer 22, the side surface 30d of the solid electrolyte layer 30, and the electrode active material
- An insulating layer 41 covering the side surface 12d of the layer 12 is provided. Further, the electrode current collector 11B protrudes from each of the outer surface 40c of the insulating layer 40 and the outer surface 41d of the insulating layer 41 on two sides of the battery 1B in plan view.
- the protruding portions 13 and 14 may be provided on the two intersecting sides.
- the protrusion 14 may be provided on the side surface 1e or 1f.
- FIG. 6 is a flow chart showing a method for manufacturing battery 1 according to the present embodiment.
- the manufacturing method of the battery 1 described below is an example, and the manufacturing method of the battery 1 is not limited to the following example.
- the method for manufacturing the battery 1 includes (1) a power generating element lamination step (steps S11 to S14), (2) a counter electrode current collector lamination step (steps S15 to S17), (3) a cutting step (step S18), (4) an insulating layer forming step (step S19); Each step will be described in detail below.
- step S11 the electrode current collector 11 is prepared (step S11).
- step S12, S13 and S14 the power generation element portion composed of the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22 is laminated in this order.
- step S12, S13 and S14 When laminating each layer, heat treatment and/or high-pressure press treatment are performed in each step as necessary. As a result, a laminated electrode plate in which the power generating elements are laminated on both main surfaces 11a and 11b of the electrode current collector 11 is obtained.
- regions 51a and 51b that are not covered with the electrode active material layer 12 are formed at respective ends of the main surfaces 11a and 11b of the electrode current collector 11 . That is, the electrode active material layer 12 is not formed on the entire main surfaces 11a and 11b of the electrode current collector 11, but is formed so as to expose only the end portions. This makes it possible to easily form the projecting portion 13 of the electrode current collector 11 in a post-process.
- the electrode active material layer 12 may be formed so as to cover the entire main surfaces 11a and 11b.
- a step of exposing the respective ends of the main surfaces 11a and 11b may be performed in the step of laminating the counter electrode current collector or the step of cutting, which will be described later.
- the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22, which constitute the power generation element portion, are formed in order using, for example, a wet coating method.
- a wet coating method By using the wet coating method, the power generation element can be easily laminated on the electrode current collector 11 .
- a coating method such as a die coating method, a doctor blade method, a roll coater method, a screen printing method or an inkjet method is used, but the method is not limited to these methods.
- a coating process is performed in which materials forming the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22 are appropriately mixed with a solvent to obtain a slurry.
- a known solvent that is used when making a known all-solid battery such as a lithium-ion all-solid battery can be used.
- the slurry of each layer obtained in the coating process is applied to the electrode current collector 11 in the order of the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22 in this order.
- the next layer may be laminated and coated after the lamination and coating of the layer previously laminated and coated is completed.
- lamination coating of the next layer may be started during the lamination coating of the layer that has been laminated and coated previously. That is, steps S12, S13 and S14 may be performed concurrently.
- the slurries of each layer are sequentially applied, and after all layers are applied, for example, a heat treatment to remove solvent and binder material, and a high pressure press treatment to promote filling of each layer material are performed.
- heat treatment and high-pressure press treatment may be performed for each coating of each layer.
- the heat treatment and the high-pressure press treatment may be performed for each coating layer in the coating stack of the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22, or may be applied to any two layers. It may be carried out separately after lamination and after coating and lamination of one layer, or may be carried out collectively after coating and lamination of all three layers.
- a roll press, a flat plate press, or the like is used for the high-pressure press treatment. At least one of heat treatment and high-pressure press treatment may not be performed.
- the lamination coating method By performing the lamination coating method in this way, it is possible to improve the bondability of the interface between the electrode current collector 11, the electrode active material layer 12, the solid electrolyte layer 30, and the counter electrode active material layer 22 and reduce the interfacial resistance. In addition, it is possible to improve the bondability and reduce the grain boundary resistance of the powder material used for the electrode active material layer 12, the solid electrolyte layer 30 and the counter electrode active material layer 22. That is, good interfaces are formed between the layers of the power generating element portion and between the powder materials inside the layers.
- the power generation element lamination process may be performed in a series of continuous processes such as a roll-to-roll method.
- the counter electrode current collector lamination step the counter electrode current collector 21 is laminated on both surfaces of the laminated electrode plate in which the power generating element portions are laminated on both surfaces of the electrode current collector 11 (step S15). Specifically, the counter electrode current collector 21 is laminated on each of the main surface 22a of the upper counter electrode active material layer 22 and the main surface 22b of the lower counter electrode active material layer 22 . At this time, they are joined by a high pressure press process or the like (step S16).
- step S17 the unit cell 2 shown in FIG. 2 is formed.
- At least part of the removal is done by cutting with a knife, laser or jet.
- part of the counter electrode active material layer 22, the solid electrolyte layer 30, and the electrode active material layer 12 may be removed at the same time.
- the cutting is performed with a size stop so as not to cut off the electrode current collector 11 to be protruded.
- removal may be done by grinding, laser trimming, plasma etching or chemical etching instead of cutting.
- removal may be by a combination of these.
- the removal method is not limited to these methods.
- the steps of laminating the power generation element if the ends of the main surfaces 11a and 11b of the electrode current collector 11 are not exposed, the counter electrode active material layer 22, the solid electrolyte layer 30 and the electrode active material layer 22, the solid electrolyte layer 30 and the electrode active material layer 22 are removed by cutting or polishing. Each edge of material layer 12 is removed. Thereby, the ends of the main surfaces 11a and 11b of the electrode current collector 11 can be exposed to form the regions 51a and 51b.
- a counter electrode current collector 21 molded to have a desired size is prepared in advance, and a They may be laminated and joined by high pressure press treatment or the like. In this case, the step of removing part of the counter electrode current collector (step S17) can be omitted.
- the cutting step the end portion of the unit cell 2 is cut so as to leave the projecting portion 13 of the electrode current collector 11 (step S18). Specifically, a part or all of the sides other than the side on which the projecting portion 13 is provided are cut with a knife, laser, jet, or the like.
- the electrode current collector 11, the electrode active material layer 12, the solid electrolyte layer 30, the counter electrode active material layer 22, and the counter electrode current collector 21 are stacked, and these are cut together. As a result, it is not necessary to laminate each layer of the power generating element portion in the shape after cutting, so the battery 1 can be easily manufactured.
- Side surfaces of the electrode current collector 11, the electrode active material layer 12, the solid electrolyte layer 30, the counter electrode active material layer 22, and the counter electrode current collector 21 are exposed at the cut sides.
- a sealing member or the like may be arranged to cover the side surfaces. That is, when the side surface is covered with another member such as a sealing member, the exposed side surface may be covered with the other member.
- the insulating layer forming step will be described.
- An insulating layer 40 is formed to cover the side surface 21c of the body 21 (step S19).
- the insulating layer 40 is arranged, for example, by coating and curing a resin material having fluidity. The coating is performed by inkjet or screen printing, or by immersing (dipping) the end face of the unit cell in a resin material. Curing is performed by drying, heating, light irradiation, or the like, depending on the resin material used.
- the protruding portion 13 of the electrode current collector 11 may be masked with tape or protected by resist treatment so that the protruding portion 13 is not insulated. .
- the electrical conductivity of the projecting portion 13 can be ensured.
- the manufacturing method of the battery 1 according to the present embodiment is not limited to the above example, and may be, for example, the manufacturing method described below.
- an electrode current collector 11 having the shape shown in FIGS. 1 and 2 is prepared. Then, using a coating process or the like, each layer of the electrode active material layer 12 and the solid electrolyte layer 30 is laminated in this order on the electrode current collector 11 in the shape shown in FIGS. 1 and 2 by lamination coating, Obtain an electrode plate.
- a counter electrode current collector 21 having the shape shown in FIGS. 1 and 2 is prepared. Then, using a coating process or the like, each layer of the counter electrode active material layer 22 and the solid electrolyte layer 30 is laminated in this order on the counter electrode current collector 21 in the shape shown in FIGS. 1 and 2 by lamination coating, Obtain a return electrode.
- the obtained electrode plate and counter electrode plate are laminated so that the respective solid electrolyte layers 30 are in contact with each other.
- the laminated body that is, the unit cell 2 is subjected to high-pressure pressing from both sides in the lamination direction using a flat plate press.
- the battery 1 is obtained by partially removing the counter electrode current collector 21 (step S17), cutting a part of the unit cell 2 (step S18), and forming the insulating layer 40 (step S19).
- the battery 1A shown in FIG. 3 can be formed by applying a thick insulating material so as to cover the end of the counter electrode current collector 21 .
- step S12 regions 53a and 53b that are not covered with the electrode active material layer 12 are formed not only on the side surface 11c side of the electrode current collector 11 but also on the end portion on the side surface 11d side.
- step S17 not only the side surface 21c side of the counter electrode current collector 21 but also the side surface 21d side end is removed. Thereby, the battery 1B shown in FIGS. 4 and 5 can be formed.
- Embodiment 2 Next, Embodiment 2 will be described.
- Embodiment 2 a laminated type laminated battery in which unit cells of the battery according to Embodiment 1 are laminated will be described.
- differences from the first embodiment will be mainly described, and descriptions of common points will be omitted or simplified as appropriate.
- FIG. 7 is a schematic cross-sectional view showing an example of a laminated battery 101 according to this embodiment.
- the laminated battery 101 includes a plurality of unit cells 3.
- the plurality of unit cells 3 are stacked along the stacking direction of the layers forming each unit cell.
- a plurality of unit cells 3 are electrically connected in parallel.
- a plurality of unit cells 3 have the same configuration.
- the unit cell 3 is different from the unit cell 2 according to the first embodiment in that it includes counter electrode layers 20B and 120 instead of the two counter electrode layers 20 .
- the counter electrode layer 20B is the same as the counter electrode layer 20B of the battery 1B according to the second modification of the first embodiment.
- the unit cell 3 also includes an insulating layer 41 .
- the counter electrode layer 120 includes a counter electrode current collector 121 and a counter electrode active material layer 22 .
- a region not covered with the counter electrode active material layer 22 is provided at the end of the counter electrode current collector 121 .
- the counter electrode current collector 121 protrudes from the outer surface 41 d of the insulating layer 41 . That is, the counter electrode current collector 121 has a projecting portion 123 projecting outward from the outer surface 41d. In plan view, the area not covered with the insulating layer 41 corresponds to the projecting portion 123 .
- the counter electrode current collector 121 protrudes from the outer surface 41d of the insulating layer 41, a counter electrode terminal for extracting the current of the counter electrode layers 20B and 120 is provided in the region of the counter electrode current collector 121 not covered with the insulating layer 41. Easy to form.
- the insulating layer 41 is provided, the exposure of the electrode active material layer 12 and the counter electrode active material layer 22 is suppressed. Breakage or short circuit due to contact is less likely to occur. Therefore, the reliability of the laminated battery 101 can be improved.
- the projecting portion 13 of the electrode current collector 11 and the projecting portion 123 of the counter electrode current collector 121 are provided on different side surfaces of the laminated battery 101 .
- the side surface provided with the protruding portion 13 and the side surface provided with the protruding portion 123 are side surfaces facing each other.
- the projecting portion 13 and the projecting portion 123 can be separated from each other, and the occurrence of a short circuit or the like due to contact can be suppressed.
- the counter electrode current collectors 21B and 121 are recessed from the counter electrode active material layer 22 on the side surface of the laminated battery 101 where the projecting portion 13 of the electrode current collector 11 is provided. As a result, end surface short-circuiting due to contact between each of counter electrode current collectors 21B and 121 and electrode active material layer 12 or electrode current collector 11 is less likely to occur. In addition, since the insulating layer 40 is provided, the exposure of the electrode active material layer 12 and the counter electrode active material layer 22 is suppressed. Breakage or short circuit due to contact is less likely to occur. Therefore, the reliability of the laminated battery 101 can be improved.
- the number of stacked unit cells 3 is four, but may be two, three, or five or more.
- a current collector is not shared between two adjacent unit cells 3 .
- two sheets of the counter electrode current collectors 21B and 121 having the same polarity are arranged so as to overlap each other.
- an adhesive layer may be provided between the current collectors.
- the adhesive layer preferably has high electrical conductivity.
- the unit cell 3 may include a counter electrode current collector 121 instead of the counter electrode current collector 21B. That is, two counter electrode current collectors 121 may be arranged so as to overlap each other.
- the method for manufacturing the laminated battery 101 includes (1) power generating element lamination step (steps S21 to S24), (2) counter electrode current collector lamination step (steps S25 to S27), and (3) cutting step (step S28). , (4) an insulating layer forming step (step S29), and (5) a unit cell stacking step (step S30).
- steps up to step S28 are unit cell manufacturing steps.
- Steps S21, 22, 23, and 24 for stacking the power generation elements are the same as steps S11, 12, 13, and 14 of the manufacturing method according to the first embodiment, and thus description thereof is omitted.
- the steps after the step of laminating the counter electrode current collector will be described in detail below.
- step S25 the counter electrode current collectors 21B and 121 are laminated on both sides of the laminated electrode plate in which the power generating element parts are laminated on both sides of the electrode current collector 11 (step S25). Specifically, the counter electrode current collector 21B is laminated on the main surface 22a of the upper counter electrode active material layer 22 . A counter electrode current collector 121 is laminated on the main surface 22b of the lower counter electrode active material layer 22 . At this time, they are joined by a high pressure press process or the like (step S26).
- each end of the counter electrode current collectors 21B and 121 is removed so that the counter electrode active material layer 22 is exposed at the end of the side where the electrode current collector 11 should protrude (step S27). Thereby, the unit cell 3 shown in FIG. 7 is formed.
- At least part of the removal is done by cutting with a knife, laser or jet.
- part of the counter electrode active material layer 22, the solid electrolyte layer 30, and the electrode active material layer 12 may be removed at the same time.
- the cutting is performed with a size stop so as not to cut off the electrode current collector 11 to be protruded.
- removal may be done by grinding, laser trimming, plasma etching or chemical etching instead of cutting.
- removal may be by a combination of these.
- the removal method is not limited to these methods.
- the end of the counter electrode current collector 21B is removed so that the counter electrode active material layer 22 is exposed only on one side of the unit cell 3 at the end of the side where the counter electrode current collector 121 should protrude.
- the edge of the counter electrode current collector 21B is removed so that the upper counter electrode active material layer 22 is exposed.
- At least part of the removal is performed by cutting with a knife, laser or jet.
- part of the counter electrode active material layer 22, the solid electrolyte layer 30, the electrode active material layer 12, and the electrode current collector 11 may be removed at the same time.
- a cut is made at the size stop.
- removal may be done by grinding, laser trimming, plasma etching or chemical etching instead of cutting.
- removal may be by a combination of these. The removal method is not limited to these methods.
- the counter electrode current collectors 21B and 121 formed to have desired dimensions are prepared in advance, and a laminated electrode plate in which the power generating element portions are laminated on both sides of the electrode current collector 11 is produced. They may be laminated on both sides and joined by high pressure press treatment or the like. In this case, the step of partially removing the counter electrode current collector 21B or 121 (step S27) can be omitted.
- the cutting step the end portion of the unit cell 3 is cut so as to leave the protruding portion 13 of the electrode current collector 11 and the protruding portion 123 of the counter electrode current collector 121 (step S28). Specifically, a part or all of the sides other than the side on which the projecting portion 13 is provided and the side on which the projecting portion 123 is provided are cut with a knife, laser, jet, or the like.
- the electrode current collector 11, the electrode active material layer 12, the solid electrolyte layer 30, the counter electrode active material layer 22, and the counter electrode current collectors 21B and 121 are stacked, and these are cut together. do.
- the unit cell 3 can be easily manufactured because it is not necessary to stack the layers of the power generating element portion in the shape after cutting.
- Side surfaces of electrode current collector 11, electrode active material layer 12, solid electrolyte layer 30, counter electrode active material layer 22, and counter electrode current collectors 21B and 121 are exposed at the cut sides.
- a sealing member or the like may be arranged to cover the side surfaces. That is, when the side surface is covered with another member such as a sealing member, the exposed side surface may be covered with the other member.
- the insulating layer forming step will be described.
- An insulating layer 40 is formed to cover side surfaces 21c of bodies 21B and 121 (step S29).
- an insulating layer 41 is formed to cover the side surface 11d of the electrode current collector 11;
- the insulating layers 40 and 41 are arranged by, for example, applying a fluid resin material and curing it.
- the coating is performed by inkjet or screen printing, or by immersing (dipping) the end face of the unit cell in a resin material. Curing is performed by drying, heating, light irradiation, or the like, depending on the resin material used.
- tape or the like is applied to the projecting portions 13 and 123 so that the projecting portion 13 of the electrode current collector 11 and the projecting portion 123 of the counter electrode current collector 121 are not insulated.
- a protective treatment may be performed by masking with or resist treatment.
- step S30 a plurality of unit cells 3 are stacked in the same direction (step S30). Specifically, the surfaces where the counter electrode active material layer 22 is exposed and the surface where the counter electrode active material layer 22 is not exposed are bonded together so that they are adjacent to each other. At this time, each unit cell 3 is preferably stacked so that the shape and position in a plan view are the same.
- the bonding of the unit cells 3 is performed by applying an adhesive or bonding an adhesive film, but the bonding method is not limited to these methods. Moreover, a heat treatment or a pressing process may be performed after bonding.
- step S29 the step of forming the insulating layers 40 and 41 (step S29) may be performed after the step of stacking the unit cells (step S30).
- the battery is composed of an electrode current collector, an electrode active material layer, a solid electrolyte layer, a counter electrode active material layer, a counter electrode current collector, and an insulating layer, but is not limited to this.
- a bonding layer or the like for reducing electrical resistance and improving bonding strength may be provided between each layer of the battery within the range allowed by the battery characteristics.
- the current collector on the side of the counter electrode active material layer of the battery is It does not have to be provided.
- the counter electrode layer may be composed of a counter electrode active material layer.
- the electrode active material layer, the solid electrolyte layer and the counter electrode active material layer have the same shape and position in plan view, but this is not the only option. At least one of the electrode active material layer, the solid electrolyte layer, and the counter electrode active material layer may have different shapes or positions in plan view.
- the power generation element portion is formed by sequentially laminating the electrode active material layer, the solid electrolyte layer and the counter electrode active material layer on the current collector. It is not limited to this.
- the electrode active material layer, the solid electrolyte layer and the counter electrode active material layer are sequentially laminated on a sheet-like substrate to form the power generation element portion, and the formed power generation element portion is removed from the substrate. It may be removed and laminated on the electrode current collector.
- a battery according to the present disclosure can be used, for example, as a secondary battery such as an all-solid-state battery used in various electronic devices, electric appliances, or automobiles.
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Abstract
Description
本発明者は、固体電解質を含む固体電解質層を備える全固体電池等の電池において、電流を取り出すために、電池の端部において端子を形成することを検討した。具体的には、同一の電極集電体の両面に電極活物質層が形成されている場合、電極集電体の端部の電極活物質層に被覆されていない領域で端子を形成することを試みた。
[1.概要]
まず、実施の形態1に係る電池の概要について、図1および図2を用いて説明する。
以下では、本実施の形態に係る電池1の変形例について説明する。なお、以下の変形例の説明において、実施の形態1との相違点を中心に説明し、共通点の説明を省略または簡略化する。
まず、変形例1に係る電池について、図3を用いて説明する。図3は、本変形例に係る電池1Aの概略断面図である。
次に、変形例2に係る電池について、図4および図5を用いて説明する。
次に、本実施の形態および各変形例に係る電池1、1Aおよび1Bの製造方法について、図6に示すフローチャートを用いて説明する。図6は、本実施の形態に係る電池1の製造方法を示すフローチャートである。なお、以下で説明する電池1の製造方法は一例であり、電池1の製造方法は、以下の例に限らない。
発電要素積層工程ではまず、電極集電体11を準備する(ステップS11)。次に、準備した電極集電体11の主面11aおよび11bの両面に、電極活物質層12と固体電解質層30と対極活物質層22とからなる発電要素部を、この順に積層する(ステップS12、S13およびS14)。各層を積層する際は、必要に応じて、各ステップにおいて熱処理および/または高圧プレス処理を行う。これにより、電極集電体11の主面11aおよび11bの両面に発電要素部が積層された積層極板が得られる。
次に、対極集電体積層工程について説明する。対極集電体積層工程では、電極集電体11の両面に発電要素部が積層された積層極板の両面に、対極集電体21を積層する(ステップS15)。具体的には、上側の対極活物質層22の主面22aと、下側の対極活物質層22の主面22bとの各々に、対極集電体21を積層する。この際、高圧プレス処理等によって接合する(ステップS16)。
次に、切断工程について説明する。切断工程では、電極集電体11の突出部13を残すように単位セル2の端部を切断する(ステップS18)。具体的には、突出部13が設けられた辺以外の辺の一部または全てを刃物、レーザーまたはジェット等によって切断する。
次に、絶縁層形成工程について説明する。絶縁層形成工程では、電極集電体11を突出させるべき辺の端部において、電極活物質層12の側面12c、固体電解質層30の側面30c、対極活物質層22の側面22c、対極集電体21の側面21cを被覆するように絶縁層40を形成する(ステップS19)。絶縁層40は、例えば、流動性を有する樹脂材料を塗工して硬化させることによって配置される。塗工は、インクジェットもしくはスクリーン印刷、または、樹脂材料に単位セルの端面を浸漬(ディップ)させることなどによって行われる。硬化は、用いる樹脂材料によって、乾燥、加熱、光照射などによって行われる。
本実施の形態に係る電池1の製造方法は、上述の例に限定されず、例えば、以下に示す製造方法であってもよい。
次に、実施の形態2について説明する。実施の形態2では、実施の形態1に係る電池の単位セルが積層された積層型の積層電池について説明する。なお、以下の説明において、上述の実施の形態1との相違点を中心に説明し、共通点の説明を適宜、省略または簡略化する。
まず、実施の形態2に係る積層電池の構成について図7を参照しながら説明する。図7は、本実施の形態に係る積層電池101の例を示す概略断面図である。
次に、本実施の形態に係る積層電池の製造方法について、図8Aおよび図8Bに示すフローチャートを用いて説明する。なお、以下で説明する積層電池101の製造方法は一例であり、積層電池101の製造方法は、以下の例に限らない。
対極集電体積層工程では、電極集電体11の両面に発電要素部が積層された積層極板の両面に対極集電体21Bおよび121を積層する(ステップS25)。具体的には、上側の対極活物質層22の主面22aには対極集電体21Bを積層する。下側の対極活物質層22の主面22bには対極集電体121を積層する。この際、高圧プレス処理等によって接合する(ステップS26)。
次に、切断工程について説明する。切断工程では、電極集電体11の突出部13および対極集電体121の突出部123を残すように単位セル3の端部を切断する(ステップS28)。具体的には、突出部13が設けられた辺および突出部123が設けられた辺以外の辺の一部または全てを刃物、レーザーまたはジェット等によって切断する。
次に、絶縁層形成工程について説明する。絶縁層形成工程では、電極集電体11を突出させるべき辺の端部において、電極活物質層12の側面12c、固体電解質層30の側面30c、対極活物質層22の側面22c、対極集電体21Bおよび121の側面21cを覆うように絶縁層40を形成する(ステップS29)。また、対極集電体121を突出させるべき辺の端部において、対極集電体21Bの側面21d、対極活物質層22の側面22d、固体電解質層30の側面30d、電極活物質層12の側面12d、電極集電体11の側面11dを覆うように絶縁層41を形成する。絶縁層40および41は、例えば、流動性を有する樹脂材料を塗工して硬化させることによって配置される。塗工は、インクジェットもしくはスクリーン印刷、または、樹脂材料に単位セルの端面を浸漬(ディップ)させることなどによって行われる。硬化は、用いる樹脂材料によって、乾燥、加熱、光照射などによって行われる。
次に、単位セル積層工程について説明する。単位セル積層工程では、複数の単位セル3を同じ向きで積層する(ステップS30)。具体的には、対極活物質層22を露出させた面と、対極活物質層22を露出させていない面とが隣り合うように貼り合わせる。この時、各単位セル3は、平面視での形状および位置が同じになるように積層されることが好ましい。単位セル3の貼り合わせは接着剤の塗工または接着フィルムの貼合によって行われるが、貼り合わせの方法は、これらの方式に限定されない。また、貼り合わせの後に、熱処理やプレスする工程が行われてもよい。
以上、本開示に係る電池およびその製造方法について、実施の形態に基づいて説明したが、本開示は、これらの実施の形態に限定されるものではない。本開示の主旨を逸脱しない限り、当業者が思いつく各種変形を実施の形態に施したもの、および、異なる実施の形態における一部の構成要素を組み合わせて構築される別の形態も、本開示の範囲に含まれる。
1c、1d、1e、1f、11c、11d、12c、12d、21c、21d、22c、22d、30c、30d 側面
2、3 単位セル
10、10B 電極層
11、11B 電極集電体
11a、11b、22a、22b 主面
12 電極活物質層
13、14、123 突出部
20、20B、120 対極層
21、21B、121 対極集電体
22 対極活物質層
30 固体電解質層
40、40A、41 絶縁層
40c、41d 外側面
51a、51b、53a、53b 領域(第1領域)
52a、52b、54a、54b 領域(第2領域)
101 積層電池
Claims (8)
- 電極集電体と、
前記電極集電体の両主面に配置された2つの電極活物質層と、
前記2つの電極活物質層の各々の、前記電極集電体とは反対側に配置された2つの固体電解質層と、
前記2つの固体電解質層の各々の、前記電極活物質層とは反対側に配置された2つの対極活物質層と、
前記2つの対極活物質層の各々の、前記固体電解質層とは反対側に配置された2つの対極集電体と、
前記2つの対極集電体、前記2つの対極活物質層、前記2つの固体電解質層、および前記2つの電極活物質層の各々の側面を被覆する第1絶縁層と、
を備え、
前記電極集電体の両主面の端部には、前記2つの電極活物質層のいずれにも被覆されていない第1領域が設けられ、
前記2つの対極活物質層の各々の、前記対極集電体側の主面の端部には、前記2つの対極集電体のいずれにも被覆されていない第2領域が設けられ、
前記第1絶縁層は、前記第2領域を被覆し、
前記電極集電体は、前記第1絶縁層の外側面から突出している、
電池。 - 平面視において、前記電池の外縁上の一点と前記電池の中心とを結び、前記第2領域に交差する直線上の前記第2領域の長さは、100μm以上である、
請求項1に記載の電池。 - 平面視において、前記電池の外縁上の一点と前記電池の中心とを結び、前記第1領域に交差する直線上の前記第1領域の長さは、1mm以上である、
請求項1または2に記載の電池。 - 前記第1絶縁層の、前記第2領域を被覆する部分の厚みは、前記対極集電体の厚みより大きい、
請求項1から3のいずれか1項に記載の電池。 - 前記電極活物質層は、負極活物質を含み、
前記対極活物質層は、正極活物質を含む、
請求項1から4のいずれか1項に記載の電池。 - 前記電池の平面視形状は、矩形であり、
前記第1絶縁層は、平面視における前記電池の少なくとも一辺に設けられている、
請求項1から5のいずれか1項に記載の電池。 - 前記電極集電体、前記2つの電極活物質層、前記2つの固体電解質層、前記2つの対極活物質層、および前記2つの対極集電体は、単位セルを構成し、
前記単位セルが複数積層されている、
請求項1から6のいずれか1項に記載の電池。 - 前記2つの対極集電体、前記2つの対極活物質層、前記2つの固体電解質層、および前記2つの電極活物質層の各々の側面のうち、前記第1絶縁層に被覆されていない各側面を覆う第2絶縁層を備え、
複数の前記対極集電体の少なくとも1つは、前記第2絶縁層の外側面から突出している、
請求項7に記載の電池。
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JP2015233003A (ja) | 2014-05-16 | 2015-12-24 | 株式会社半導体エネルギー研究所 | 二次電池を備えた電子機器 |
JP2019197652A (ja) * | 2018-05-09 | 2019-11-14 | トヨタ自動車株式会社 | 積層電池の製造方法 |
JP2019200863A (ja) * | 2018-05-14 | 2019-11-21 | トヨタ自動車株式会社 | 全固体電池及びその製造方法 |
JP2020013729A (ja) | 2018-07-19 | 2020-01-23 | トヨタ自動車株式会社 | 直列積層型全固体電池の製造方法 |
WO2021192574A1 (ja) * | 2020-03-25 | 2021-09-30 | パナソニックIpマネジメント株式会社 | 電池 |
JP2022020241A (ja) * | 2020-07-20 | 2022-02-01 | トヨタ自動車株式会社 | 全固体電池の製造方法 |
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JP2015233003A (ja) | 2014-05-16 | 2015-12-24 | 株式会社半導体エネルギー研究所 | 二次電池を備えた電子機器 |
JP2019197652A (ja) * | 2018-05-09 | 2019-11-14 | トヨタ自動車株式会社 | 積層電池の製造方法 |
JP2019200863A (ja) * | 2018-05-14 | 2019-11-21 | トヨタ自動車株式会社 | 全固体電池及びその製造方法 |
JP2020013729A (ja) | 2018-07-19 | 2020-01-23 | トヨタ自動車株式会社 | 直列積層型全固体電池の製造方法 |
WO2021192574A1 (ja) * | 2020-03-25 | 2021-09-30 | パナソニックIpマネジメント株式会社 | 電池 |
JP2022020241A (ja) * | 2020-07-20 | 2022-02-01 | トヨタ自動車株式会社 | 全固体電池の製造方法 |
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