JP2020080247A - Solid-state battery - Google Patents

Abstract

To provide a solid-state battery indicating a high capacitance and a high durability.SOLUTION: A solid-state battery is structured by: a positive electrode layer 13 containing a positive electrode active material; a negative electrode layer 11 containing a negative electrode active material; and a solid-electrolyte layer 15 arranged so as to be interposed between the positive electrode layer and the negative electrode layer. At least one electrode layer of two electrode layers further comprises a solid electrode extended to a two-dimensional lattice shape to a surface direction orthogonal to a lamination direction of the electrode layer and a conductive assistant 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to solid state batteries.

  2. Description of the Related Art In recent years, demand for high-capacity, high-output batteries is rapidly expanding due to the spread of various electric and electronic devices such as automobiles, personal computers, and mobile phones. Among various batteries, there is a high demand for batteries showing high energy density and output, and further high performance batteries are expected to be developed. Among them, solid-state batteries are attracting attention because they are excellent in safety because they are nonflammable electrolytes and have higher energy density.

JP, 2017-107826, A

In the conventional solid-state battery, or when performing rapid charge and discharge, when thickening the electrode layers for high capacity, the electrode layer inside the charge transfer medium in repeated charge-discharge cycles (electronic e ^- And the concentration distribution of ions Li ⁺ etc.) was biased. Due to this deterioration, the electrode layer cannot be used uniformly in the thickness direction as the battery is used, and the conduction resistance of the charge transfer medium is increased.

  The present invention has been made in view of the above, and an object of the present invention is to provide a solid state battery having high capacity and high durability by controlling the distribution state and contact state of components contained in the active material layer.

  (1) The present invention relates to a positive electrode layer containing a positive electrode active material, a negative electrode layer containing a negative electrode active material, and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer. In the solid-state battery composed of, the at least one electrode layer of the two electrode layers further contains a solid electrolyte extending in a two-dimensional lattice shape in a plane direction orthogonal to the stacking direction of the electrode layers and a conductive additive. A solid-state battery is provided.

This makes it possible to stack the electrode active material with a low resistance, and to eliminate the bias in the concentration distribution of the charge transfer medium (electrons e ⁻ and ions Li ⁺ etc.) in the electrode layer, resulting in high capacity and high capacity. It is possible to provide a solid-state battery exhibiting high durability.

  (2) In the invention of (1), the at least one electrode layer has a three-dimensional lattice shape in which the solid electrolyte and the conductive additive include the stacking direction and two directions orthogonal to the stacking direction. It is preferably arranged.

  This makes it possible to provide a solid-state battery having a higher capacity and a higher durability.

  (3) In the invention of (1) or (2), the solid electrolyte and the conduction aid may be mixed and arranged in the lattice.

  (4) In the inventions of (1) to (3), the solid electrolyte and the conduction aid constitute a solid electrolyte layer and a conduction aid layer adjacent to the solid electrolyte layer in the lattice and arranged. It may have been done.

  (5) In the inventions of (1) to (4), the ratio of the cross-sectional area of the active material portion to the cross-sectional area of the solid electrolyte portion in the cross section orthogonal to the stacking direction of the electrode layers is 1 to 600. preferable.

  (6) In the inventions of (1) to (5), the ratio of the cross-sectional areas is preferably 4 to 100.

  (7) In the inventions of (1) to (6), the ratio of the cross-sectional areas is preferably 6 to 50.

  This makes it possible to provide a battery having even lower resistance.

  According to the present invention, it is possible to provide a solid-state battery having high capacity and high durability.

It is a figure which shows the outline of the solid-state battery cell 10 of this invention. It is a figure which shows the structure of the solid battery cell which concerns on 1st Embodiment of this invention. It is a figure which shows the structure of the solid-state battery cell which concerns on 2nd Embodiment of this invention. 6 is a graph showing the specific resistance and the specific capacity of the electrode according to the embodiment of the present invention with respect to the area ratio of the active material portion and the solid electrolyte portion in the horizontal cross section of the positive electrode layer. 3 is a graph showing the specific resistance and the specific capacity of the electrode according to the embodiment of the present invention with respect to the area ratio of the solid electrolyte portion and the conductive auxiliary agent portion in the horizontal cross section of the positive electrode layer. 6 is a graph showing the specific resistance and the specific capacitance of the electrode according to the embodiment of the present invention with respect to the thickness ratio of the electrode layer. It is a graph which shows the result of having performed the charging/discharging cycle test about the change of the specific resistance and specific capacity of the electrode which concerns on embodiment of this invention. FIG. 9 is a schematic diagram showing a positive electrode active material in Modification 1 of the present invention. It is a schematic diagram showing a part of vertical cross section of the positive electrode layer in the modification 1 of the present invention.

  Hereinafter, the solid-state battery and the method for manufacturing the same of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.

(Solid battery cell)
FIG. 1 is a diagram showing an outline of a solid-state battery cell 10 of the present invention.
The solid-state battery cell 10 of the present invention has a layered structure and includes a positive electrode layer 13, a negative electrode layer 11, and a solid electrolyte layer 15 interposed between these electrode layers, and further collects a positive electrode. A positive electrode current collector 14 and a negative electrode current collector 12 that collects current from the negative electrode are provided. Each of the positive electrode current collector 14 and the negative electrode current collector 12 has a coating layer (conductive auxiliary agent layers 14a and 12a) made of a conductive auxiliary agent on the surface facing the active material. These layers are, for example, in order from the bottom of FIG. 1, the negative electrode current collector 12, the conductive auxiliary agent layer 12a, the negative electrode layer 11, the solid electrolyte layer 15, the positive electrode layer 13, the conductive auxiliary agent layer 14a, the positive electrode current collector 14, It is configured like. Furthermore, by stacking a plurality of this configuration as the solid-state battery cell 10, the high-capacity solid-state battery 100 is formed.

(Positive/negative electrode layer)
The positive electrode layer 13 used in the solid-state battery of the present invention is a layer containing a positive electrode active material, a solid electrolyte, and a conductive additive. As the positive electrode active material, a material capable of releasing and occluding the charge transfer medium may be appropriately selected and used. Further, from the viewpoint of exhibiting flexibility, a binder may be optionally included. As the solid electrolyte, the conductive additive, and the binder, those generally used for solid batteries can be used. The negative electrode layer 11 has the same configuration except that it contains a negative electrode active material instead of the positive electrode active material.

  In the positive electrode layer 13, the conductive phase 30 composed of the solid electrolyte and the conductive additive is laid out in a lattice shape in the stacking direction of the positive and negative electrode layers so that it is ubiquitous in the positive electrode layer. The conductive phase 30 divides the positive electrode layer into a plurality of sections.

  As a result, the contact area of the electrode active material with the solid electrolyte and the conduction aid increases, and the conduction resistance of the charge transfer medium decreases. That is, the positive and negative electrode layers can be formed thick, and the capacity of the battery can be increased. Further, since the electrode active material is divided by the lattice, the movement path of the charge transfer medium is defined, so that the charge transfer medium is less likely to be scattered in the layer, and the bias of the charge transfer medium concentration distribution is alleviated. , The cycle characteristics of the battery, that is, the durability is improved.

(Cathode active material)
The positive electrode active material may be the same as that used for the positive electrode active material layer of a general solid battery, and is not particularly limited. For example, in the case of a lithium ion battery, a layered active material containing lithium, a spinel type active material, an olivine type active material and the like can be mentioned. Specific examples of the positive electrode active material include lithium cobalt oxide (LiCoO ₂ ), lithium nickel oxide (LiNiO ₂ ), LiNi _p Mn _q Co _r O ₂ (p+q+r=1), and LiNi _p Al _q Co _r O ₂ (p+q+r=). 1), lithium manganate (LiMn ₂ O ₄ ), Li ₁ +xMn ₂ −x-yMyO ₄ (x+y=2, M=Al, Mg, Co, Fe, Ni, and at least one selected from Zn). And a different element-substituted Li-Mn spinel, lithium metal phosphate (at least one selected from LiMPO ₄ , M=Fe, Mn, Co, and Ni) and the like.

(Negative electrode active material)
The negative electrode active material is not particularly limited as long as it can store and release the charge transfer medium. For example, in the case of a lithium ion battery, lithium titanate (Li ₄ Ti ₅ O ₁₂ ) or the like can be used. Lithium transition metal oxides, transition metal oxides such as TiO ₂ , Nb ₂ O ₃ and WO ₃ , metal sulfides, metal nitrides, and carbon materials such as graphite, soft carbon and hard carbon, and metal lithium and metal indium. And lithium alloys. The negative electrode active material may be in the form of powder or thin film.

(Current collector)
The positive electrode current collector 14 is not particularly limited as long as it has a function of collecting current from the positive electrode layer, and examples thereof include aluminum, aluminum alloys, stainless steel, nickel, iron and titanium. Among them, aluminum, Aluminum alloys and stainless steel are preferred. The shape of the positive electrode current collector 14 may be, for example, a foil shape, a plate shape, or the like.

  The negative electrode current collector 12 is not particularly limited as long as it has a function of collecting current from the negative electrode layer 13. Examples of the material of the negative electrode current collector 12 include nickel, copper, and stainless steel. The shape of the negative electrode current collector 12 may be, for example, a foil shape or a plate shape.

(Method for manufacturing electrode layer)
The positive and negative electrode layers can be manufactured by disposing the mixture containing the active material on the surface of the current collector. As the method for producing the electrode layer, the same method as the conventional method can be used except that the solid electrolyte and the conductive additive are introduced into the layer, and the electrode layer can be produced by either the wet method or the dry method. Hereinafter, the case of manufacturing a positive electrode by a wet method will be described.

  The positive electrode layer includes a step of obtaining a positive electrode mixture slurry solution containing a positive electrode mixture and a solvent, and applying the positive electrode mixture slurry solution to the surface of the positive electrode current collector and drying the solution to form a positive electrode current collector surface. It is manufactured by the step of forming a positive electrode mixture layer. For example, a positive electrode mixture slurry solution can be obtained by mixing and dispersing a material forming the positive electrode layer, such as an active material, a solid electrolyte, a conductive auxiliary agent, and a binder, in a solvent. The solvent used in this case is not particularly limited and may be appropriately selected depending on the properties of the positive electrode active material, the solid electrolyte and the like. For example, a nonpolar solvent such as heptane is preferable. For mixing and dispersing the positive electrode mixture and the solvent, various mixing/dispersing devices such as an ultrasonic dispersing device, a shaker, and FILMIX (registered trademark) can be used. The solid content of the positive electrode mixture slurry solution is not particularly limited.

  The positive electrode mixture slurry solution thus obtained is applied to the surface of the positive electrode current collector and dried to form a positive electrode mixture layer on the surface of the positive electrode current collector, whereby a positive electrode can be obtained. it can. Here, for example, a slurry solution containing an active material as a main component and a slurry solution containing only a solid electrolyte and a conductive auxiliary agent are individually adjusted, and the components in each solution are laminated while patterning when laminating the positive electrode. You can

  The means for applying the slurry solution to the surface of the positive electrode current collector is not particularly limited, and an inkjet method, a screen printing method, a CVD method, a sputtering method, or the like can be used, and a known coating means such as a doctor blade. May be used. The total thickness of the dried positive electrode material mixture layer and the positive electrode current collector (thickness of the positive electrode) is not particularly limited, but is 0.1 μm or more and 1 mm or more from the viewpoint of energy density or stackability, for example. It is preferably not more than 1 μm, more preferably not less than 1 μm and not more than 200 μm. In addition, the positive electrode may be manufactured through an arbitrary pressing process. The pressure when pressing the positive electrode can be about 100 MPa.

(Solid electrolyte layer)
The solid electrolyte layer 15 is a layer laminated between the positive electrode layer 13 and the negative electrode layer 11, and is a layer containing at least a solid electrolyte material. The charge transfer medium can be conducted between the positive electrode active material and the negative electrode active material via the solid electrolyte material contained in the solid electrolyte layer 15.

  The solid electrolyte material is not particularly limited as long as it has charge transfer medium conductivity, for example, sulfide solid electrolyte material, oxide solid electrolyte material, nitride solid electrolyte material, halide solid electrolyte Examples of the material include a sulfide solid electrolyte material. This is because the conductivity of the charge transfer medium is higher than that of the oxide solid electrolyte material.

Examples of the sulfide solid electrolyte material include Li ₂ S-P ₂ S ₅ and Li ₂ S-P ₂ S ₅ -LiI in the case of a lithium ion battery. Incidentally, the above description _"Li 2 _S-P 2 _{S 5"} means a sulfide solid electrolyte material obtained by using a raw material composition containing Li ₂ S and _P 2 _{S 5,} the same for the other described is there.

On the other hand, examples of the oxide solid electrolyte material include NASICON-type oxides, garnet-type oxides, and perovskite-type oxides in the case of lithium ion batteries. Examples of NASICON-type oxides include oxides containing Li, Al, Ti, P, and O (for example, Li _1.5 Al _0.5 Ti _1.5 (PO ₄ ) ₃ ). Examples of garnet-type oxides include oxides containing Li, La, Zr, and O (for example, Li ₇ La ₃ Zr ₂ O ₁₂ ). Examples of perovskite oxides include oxides containing Li, La, Ti, and O (for example, LiLaTiO ₃ ).

(Method for producing solid electrolyte layer)
The solid electrolyte layer 15 can be produced, for example, through a process such as pressing the solid electrolyte. Alternatively, the solid electrolyte layer can be prepared through a process of applying a solid electrolyte slurry solution prepared by dispersing a solid electrolyte or the like in a solvent to the surface of a substrate or an electrode. The solvent used in this case is not particularly limited and may be appropriately selected depending on the properties of the binder and the solid electrolyte. Although the thickness of the solid electrolyte layer varies greatly depending on the configuration of the battery, it is preferably 0.1 μm or more and 1 mm or less, and more preferably 1 μm or more and 100 μm or less.

(Method of manufacturing solid state battery)
The solid battery cell 10 of the present invention is manufactured by stacking the positive electrode layer, the solid electrolyte layer, the negative electrode layer, and the current collector layer in the order shown in FIG. After stacking these, they may be optionally pressed to be integrated. Furthermore, by stacking a plurality of this structure as a solid-state battery cell, they can be integrated to form a high-output solid-state battery 100. The solid state battery 100 may be optionally pressed again to be integrated.

  Hereinafter, examples of embodiments according to the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram showing a configuration of the solid-state battery cell according to the first embodiment of the present invention.
As shown in FIG. 2, in the positive and negative electrode layers according to the first embodiment of the present invention, the solid electrolyte and the conductive auxiliary agent are laminated and arranged in a grid shape in the laminating direction of the positive and negative electrode layers. As a result, the contact area of the electrode active material with the solid electrolyte and the conduction aid increases, and the conduction resistance of the charge transfer medium decreases. That is, the positive and negative electrode layers can be formed thick and the capacity of the battery can be increased.

  Furthermore, since the electrode active material is divided by the lattice, the movement path of the charge transfer medium is defined, so that the charge transfer medium is less likely to be scattered in the layer, and the bias in the charge transfer medium concentration distribution is alleviated. , The cycle characteristics of the battery, that is, the durability is improved.

FIG. 3 is a diagram showing a configuration of a solid-state battery cell according to the second embodiment of the present invention.
As shown in FIG. 3, the second embodiment of the present invention is the same as the first embodiment, except that the positive and negative electrode layers and the layer composed of the solid electrolyte and the conductive additive are laminated in the positive and negative electrode layers. Are alternately laminated. As a result, the above-mentioned effects are exerted more greatly, and higher capacity and higher durability can be achieved.

  Hereinafter, the positive electrode active material of the present invention will be described in detail with reference to Examples.

  Using the lithium-transition metal composite oxide manufactured by the above manufacturing method as a positive electrode active material, a battery for evaluation was manufactured by the following procedure.

(Preparation of positive electrode)
A positive electrode active material, acetylene black, polyvinylidene fluoride (PVDF), and a solid electrolyte were dispersed in N-methyl-2-pyrrolidone (NMP) to prepare a positive electrode mixture slurry. A solid electrolyte for positive electrode, acetylene black, and polyvinylidene fluoride (PVDF) were dispersed in N-methyl-2-pyrrolidone (NMP) to prepare a solid electrolyte slurry for positive electrode.
The obtained positive electrode mixture was applied to SUS or aluminum foil as a current collector using a screen printing plate and dried. Next, the solid electrolyte slurry was coated on the positive electrode mixture coating sheet previously coated with a screen printing plate. After this was dried, it was compression-molded by a roll press machine and cut into a predetermined size to prepare a positive electrode.

(Preparation of negative electrode)
The negative electrode active material and PVDF were dispersed in NMP to prepare a negative electrode mixture slurry. Further, the solid electrolyte for negative electrode, acetylene black, and polyvinylidene fluoride (PVDF) were dispersed in N-methyl-2-pyrrolidone (NMP) to prepare a solid electrolyte slurry for negative electrode.
Using a screen printing plate, the negative electrode mixture was applied to SUS or Cu foil as a current collector and dried. Next, the solid electrolyte slurry for negative electrode was coated on the negative electrode mixture coating sheet previously coated with a screen printing plate. After drying the obtained negative electrode sheet, it was compression-molded by a roll press machine to prepare a negative electrode.

(Preparation of solid electrolyte layer)
A solid electrolyte, polyvinylidene fluoride (PVDF) was dispersed in N-methyl-2-pyrrolidone (NMP) to prepare a solid electrolyte slurry. The obtained solid electrolyte slurry is applied to an electrode sheet coated with a negative electrode mixture and a solid electrolyte for a negative electrode, dried and compression-molded by a roll press machine, and then cut into a predetermined size to obtain a negative electrode + solid charge A sheet was prepared.

(Preparation of evaluation battery)
After attaching the lead electrodes to the current collectors of the positive electrode and the negative electrode, respectively, the positive electrode and the solid electrolyte+negative electrode were laminated and housed in a bag-shaped laminate pack. Then, it was sealed in a laminate pack under an argon atmosphere. The battery thus obtained was placed in a thermostat and aged with a weak current.

  The capacities and resistance values of the batteries for evaluation under various electrode constitution conditions produced by the above method were measured, and the relationship between the electrode constitution and the capacities and resistance values was evaluated. In addition, a charge/discharge cycle test was performed by the following method to evaluate durability (performance maintenance rate).

(Charge/discharge cycle test)
A charge/discharge cycle test was performed on the above-mentioned evaluation battery (Example) and evaluation battery using a conventional electrode (Comparative Example) under a temperature condition of 60°C. In the charge/discharge cycle test, charging is performed up to a charging upper limit voltage of 4.2V with a constant current of a current density of 2.0 mA/cm ² , and then discharging is performed up to a discharging lower limit voltage of 2.7V with a constant current of a current density of 20 mA/cm ^2. Charging/discharging was 1 cycle, and this cycle was performed 1000 times in total. Then, the discharge capacity was measured for each cycle, and the performance retention rate was calculated using the formula (discharge capacity at 1000th cycle/discharge capacity at 1st cycle)×100.
As a conventional battery for evaluation using an electrode, a structure in which the solid electrolyte, the conductive additive and the active material were not controlled in each electrode layer and was uniformly mixed was used. The electrode was produced by slurrying an active material, a conductive auxiliary agent, a binder, and a solid electrolyte, mixing them, and then applying them.

FIG. 4 is a graph showing the specific resistance and the specific capacity of the electrode according to the embodiment of the present invention with respect to the area ratio of the active material portion and the solid electrolyte portion in the horizontal cross section of the positive electrode layer.
In the horizontal cross section of the positive electrode layer, when the cross-sectional area of the active material portion is A and the cross-sectional area of the solid electrolyte portion is SE, the area ratio A/SE is preferably 1 to 600, more preferably 4 to 100, more preferably 6 to 50. In this range, an electrode having low resistance and high capacity can be provided.

FIG. 5 is a graph showing the specific resistance and the specific capacity of the electrode according to the embodiment of the present invention with respect to the area ratio of the solid electrolyte portion and the conductive auxiliary agent portion in the horizontal cross section of the positive electrode layer.
Further, in the horizontal cross section of the positive electrode layer, SE/C is preferably 1 to 50,000, more preferably 10 to 10,000, and still more preferably 50 to 1,000, where C is the cross-sectional area of the conductive additive. is there. In this range, a lower resistance electrode can be provided.

FIG. 6 is a graph showing the specific resistance and the specific capacitance of the electrode according to the embodiment of the present invention with respect to the thickness ratio of the electrode layer.
The electrode of the present invention has a smaller specific resistance with respect to the thickness ratio of the electrode layer, as compared with the conventional electrode in which the electrode active material, the solid electrolyte and the conductive additive are uniformly mixed. It is presumed that the resistance value is significantly reduced due to the presence of the layer composed of the solid electrolyte and the conductive additive. On the other hand, since the specific capacity is equal to the volume ratio, there is no difference between both electrodes. Therefore, an electrode having a low resistance is realized while maintaining the capacity, that is, an electrode having a high capacity is realized while maintaining the resistance.

FIG. 7 is a graph showing the results of a charge/discharge cycle test for changes in the specific resistance and the specific capacity of the electrode according to the embodiment of the present invention.
The electrode of the present invention was excellent in both capacity and resistance after 1000 cycles, as compared with the conventional electrode in which the electrode active material, the solid electrolyte and the conductive additive were uniformly mixed. By dividing the electrode active material by the grid, the movement path of the charge transfer medium is defined, so that the bias of the charge transfer medium concentration distribution is alleviated and the cycle characteristics of the battery are improved.

FIG. 8 is a schematic diagram showing a positive electrode active material in Modification 1 of the present invention.
In the present invention, the positive electrode active material is one in which a core particle having a layered rock salt structure is coated with a potential insulating layer, and the potential insulating layer is further coated with a solid electrolyte and a conductive auxiliary agent layer. Preferably. This makes it possible to reduce the conduction resistance while suppressing the deterioration of the active material. The material forming the potential insulating layer is not particularly limited, and a layer that conducts the charge transfer medium may be formed while insulating the surface of the active material, such as LiNbO ₃ . As the solid electrolyte, a substance different from the solid electrolyte layer 15 and the solid electrolyte forming the conductive phase 30 may be used, and for example, LiPS ₄ , LLZ, LLZ-Al, LLZ-Ga, or the like can be used.

FIG. 9 is a schematic view showing a part of a vertical cross section of the positive electrode layer according to Modification 1 of the present invention.
In one section of the positive electrode layer divided by the conductive phase 30, it is preferable that the voids between the particles of the active material are further filled with the particles of the solid electrolyte and the conductive additive. This further reduces the conduction resistance.

  The example of the embodiment of the present invention has been described above. According to this embodiment, the following effects are exhibited.

In the present embodiment, the present invention provides a positive electrode layer containing a positive electrode active material, a negative electrode layer containing a negative electrode active material, and a solid disposed between the positive electrode layer and the negative electrode layer. In a solid-state battery including an electrolyte layer, at least one of the two electrode layers has a solid electrolyte and a conductive additive that extend in a two-dimensional lattice shape in a plane direction orthogonal to the stacking direction of the electrode layers. The structure further contains.
As a result, it becomes possible to stack the electrode active material with low resistance, and it is possible to eliminate the bias in the concentration distribution of the charge transfer medium in the electrode layer, so that it is possible to provide a solid battery having high capacity and high durability. It will be possible.

In this embodiment, the at least one electrode layer has a structure in which the solid electrolyte and the conductive additive are arranged in a three-dimensional lattice shape including the stacking direction and two directions orthogonal to the stacking direction. did.
This makes it possible to provide the solid-state battery exhibiting the above-mentioned effects to a greater extent and having a higher capacity and a higher durability.

  In the present embodiment, the solid electrolyte and the conductive auxiliary agent may be arranged in a mixed state in the lattice, a solid electrolyte layer in the lattice, and a conductive auxiliary agent layer adjacent to the solid electrolyte layer. , May be configured and arranged.

In the present embodiment, the ratio of the cross-sectional area of the active material portion to the cross-sectional area of the solid electrolyte portion in the cross section orthogonal to the stacking direction of the electrode layers is 1 to 600, more preferably 4 to 100, further preferably 6 to It was set to 50.
This makes it possible to provide a battery having even lower resistance.

DESCRIPTION OF SYMBOLS 1... Positive electrode active material 2... Insulator coating layer 3... Solid electrolyte and conductive auxiliary agent 10... Solid battery cell 11... Negative electrode layer 12... Negative electrode layer current collector 12a... Conductive auxiliary agent layer 13... Positive electrode layer 14... Positive electrode layer collection Electric body 14a... Conductivity aid layer 15... Solid electrolyte layer 30... Solid electrolyte and conduction aid phase 100... Laminated battery

Claims (7)

A positive electrode layer containing a positive electrode active material,
A negative electrode layer containing a negative electrode active material,
In a solid battery composed of a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer,
At least one electrode layer of the two electrode layers is
A solid-state battery further containing a solid electrolyte extending in a two-dimensional lattice shape in a plane direction orthogonal to the stacking direction of the electrode layers and a conductive additive. The at least one electrode layer,
The solid electrolyte and the conduction aid,
The solid-state battery according to claim 1, wherein the solid-state battery is arranged in a three-dimensional lattice pattern including the stacking direction and two directions orthogonal to the stacking direction.   The solid-state battery according to claim 1, wherein the solid electrolyte and the conductive auxiliary agent are mixed and arranged in the lattice.   The solid battery according to claim 1 or 2, wherein the solid electrolyte and the conductive auxiliary agent are arranged to form a solid electrolyte layer and a conductive auxiliary agent layer adjacent to the solid electrolyte layer in the grid.   The solid-state battery according to claim 1, wherein a ratio of a cross-sectional area of the active material portion to a cross-sectional area of the solid electrolyte portion is 1 to 600 in a cross section orthogonal to the stacking direction of the electrode layers.   The solid-state battery according to claim 1, wherein a ratio of a cross-sectional area of the active material portion to a cross-sectional area of the solid electrolyte portion is 4 to 100 in a cross section orthogonal to the stacking direction of the electrode layers. 7. The solid state battery according to claim 1, wherein a ratio of a cross sectional area of the active material portion to a cross sectional area of the solid electrolyte portion is 6 to 50 in a cross section orthogonal to the stacking direction of the electrode layers.

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