JP6863213B2 - How to manufacture a secondary battery - Google Patents

Description

The present disclosure relates to a method for manufacturing a secondary battery.

A secondary battery such as a lithium ion secondary battery is lighter in weight and has a higher energy density than an existing battery, and is therefore preferably used as a so-called portable power source or a high output power source for mounting on a vehicle. For such secondary batteries, further increase in energy density is being studied as part of improving the performance.

For example, Patent Document 1 discloses a secondary battery in which a particle coating film containing a metal salt is formed on the surface of negative electrode active material particles.

Japanese Unexamined Patent Publication No. 2009-021229

In a secondary battery, there is known a technique of impregnating a non-aqueous electrolyte solution with a fluorine-based solvent to increase the oxidation potential of the non-aqueous electrolyte solution and suppress oxidative decomposition in a high potential state. However, when a non-aqueous electrolytic solution containing a fluorine-based solvent is used, there is a problem that the electrolytic solution is reduced and decomposed and the amount of self-discharge increases.

On the other hand, the present inventors are studying coating the surface of the negative electrode active material with a metal-organic framework. Through various studies, the present inventors have found that by coating the surface of the negative electrode active material with a metal-organic framework, it is possible to suppress the reductive decomposition of the electrolytic solution and suppress the increase in the amount of self-discharge. It was. After that, from the viewpoint of cost reduction, when it was examined to use water as the dispersion medium of the negative electrode slurry, the metal-organic framework covering the negative electrode active material may deteriorate and the self-discharge amount of the secondary battery may increase. I found a new issue. That is, we have discovered a new problem that the amount of self-discharge of the secondary battery may increase when the negative electrode slurry is prepared using water as the dispersion medium.

The present disclosure has been made in view of the above problems, and mainly provides a method for manufacturing a secondary battery capable of suppressing an increase in the amount of self-discharge even when a negative electrode slurry containing water is used. The purpose.

In order to achieve the above object, in the present disclosure, it is formed between the negative electrode active material layer having the negative electrode active material, the positive electrode active material layer having the positive electrode active material, and the negative electrode active material layer and the positive electrode active material layer. A method for manufacturing a secondary battery having an electrolyte layer having a non-aqueous electrolyte solution containing a fluorine-based solvent, which comprises the negative electrode active material coated with a metal organic structure containing a zirconium element and water. Provided is a method for manufacturing a secondary battery, which comprises a negative electrode active material layer forming step of forming the negative electrode active material layer using a negative electrode slurry containing a dispersion medium.

According to the present disclosure, a negative electrode active material layer for forming the negative electrode active material layer by using a negative electrode slurry containing the negative electrode active material coated with a metal organic structure containing a zirconium element and a dispersion medium containing water. By having the forming step, it is possible to obtain a secondary battery capable of suppressing an increase in the amount of self-discharge. Further, since a dispersion medium containing water can be used, an increase in cost can be suppressed as compared with the case where a solvent is used as the dispersion medium.

The present disclosure has an effect that it is possible to provide a method for manufacturing a secondary battery capable of suppressing an increase in the amount of self-discharge even when a negative electrode slurry containing water is used.

It is the schematic sectional drawing which shows an example of the secondary battery of this disclosure. It is a flowchart which shows an example of the negative electrode active material layer formation process in this disclosure. It is a graph which shows the voltage difference before and after the high temperature storage of the secondary battery obtained in Example and Comparative Examples 1-5.

Hereinafter, the method for manufacturing the secondary battery according to the embodiment of the present disclosure will be described in detail.

FIG. 1 is a schematic cross-sectional view showing an example of a secondary battery obtained by the method for manufacturing a secondary battery of the present disclosure. The secondary battery 10 shown in FIG. 1 is formed between a negative electrode active material layer 1 having a negative electrode active material, a positive electrode active material layer 2 having a positive electrode active material, and a negative electrode active material layer 1 and a positive electrode active material layer 2. The electrolyte layer 3 has a non-aqueous electrolyte solution containing a fluorine-based solvent. Further, the secondary battery 10 shown in FIG. 1 includes a negative electrode current collector 4 that collects electricity from the negative electrode active material layer 1, a positive electrode current collector 5 that collects electricity from the positive electrode active material layer 2, and members thereof. It has a battery case 6 for storing the above. The method for manufacturing a secondary battery of the present disclosure relates to a negative electrode active material layer forming step for forming the negative electrode active material layer 1 in the secondary battery 10. FIG. 2 is a flowchart showing an example of the negative electrode active material layer forming step in the present disclosure. As shown in FIG. 2, in the negative electrode active material layer forming step in the present disclosure, for example, a negative electrode slurry containing a negative electrode active material coated with a metal organic structure containing a zirconium element and a dispersion medium containing water is used. This is the step of forming the negative electrode active material layer.

According to the present disclosure, a negative electrode active material layer for forming the negative electrode active material layer by using a negative electrode slurry containing the negative electrode active material coated with a metal organic structure containing a zirconium element and a dispersion medium containing water. By having the forming step, it is possible to obtain a secondary battery capable of suppressing an increase in the amount of self-discharge. Further, since a dispersion medium containing water can be used, an increase in cost can be suppressed as compared with the case where a solvent is used as the dispersion medium. The reason why the method for manufacturing the secondary battery of the present disclosure exerts such an effect is presumed to be as follows. That is, for example, when the component contained in the metal-organic framework has a property of being easily dissolved in water, it is considered that the metal-organic framework is peeled off from the negative electrode active material when the negative electrode slurry contains water. On the other hand, in the present disclosure, since the metal-organic framework contains a zirconium element having a property of being relatively difficult to dissolve in water, even if the negative electrode slurry contains water, the metal-organic framework is peeled off from the negative electrode active material, etc. It is thought that the occurrence of the problem can be suppressed. For this reason, it is presumed that the method for manufacturing the secondary battery of the present disclosure has the above-mentioned effect. It should be noted that such an effect is clear from the results of Examples and Comparative Examples described later (FIG. 3).

Further, the present disclosure is based on the finding that by coating the surface of the negative electrode active material with a metal-organic framework, the reductive decomposition of the electrolytic solution can be suppressed and the increase in the amount of self-discharge can be suppressed. The above findings will be described below.

Conventionally, in a secondary battery, a technique has been known in which a fluorine-based solvent is contained in a non-aqueous electrolytic solution to increase the oxidation potential of the non-aqueous electrolytic solution and suppress oxidative decomposition in a high potential state. Therefore, when we examined a secondary battery in which a non-aqueous electrolyte solution contained a fluorine-based solvent, a secondary battery in which the non-aqueous electrolyte solution contained a non-fluorine-based solvent (the non-aqueous electrolyte solution did not contain a fluorine-based solvent). It was found that the electrolytic solution is more easily reduced and decomposed than the secondary battery), and the self-discharge amount is remarkably increased. Therefore, the present inventors have obtained the finding that the above problems can be solved by coating the surface of the negative electrode active material with a metal-organic framework. The reason is considered to be as follows.

Metal-organic frameworks (MOFs) have a porous coordination network structure with a high surface area due to the interaction between metals and organic ligands. By coating the surface of the negative electrode active material with such a metal-organic structure, electron insulation and ionic conductivity can be imparted, whereby the decomposition reaction on the negative electrode active material layer can be suppressed. It is presumed. Further, in the present disclosure, the metal-organic framework can impart electronic insulation and ionic conductivity, and can suppress deterioration of battery performance. This is because the metal-organic structure has a predetermined structure as described above, so that the metal-organic structure coated on the surface of the negative electrode active material is preferable when lithium ions move between the positive electrode and the negative electrode of the secondary battery. It is thought that this is due to the fact that it exerts a large Li storage capacity. Specifically, it is considered that when the metal-organic framework exhibits a good Li storage capacity, for example, when Li ⁺ is inserted into the negative electrode active material during charging, the movement of ^{Li + is accelerated.}

Hereinafter, the method for manufacturing the secondary battery of the present disclosure will be described separately for each step.

1. 1. Negative electrode active material layer forming step The negative electrode active material layer forming step in the present disclosure uses a negative electrode slurry containing the negative electrode active material coated with a metal organic structure containing a zirconium element and a dispersion medium containing water. This is a step of forming the negative electrode active material layer.

(1) Negative electrode slurry The negative electrode slurry in the present disclosure contains the above negative electrode active material coated with a metal-organic framework containing a zirconium element and a dispersion medium containing water.

The negative electrode active material contained in the negative electrode slurry may be any material that can be used for a secondary battery, and examples thereof include a carbon material. Specific examples of the carbon material include a graphite material, that is, graphite. Specific examples thereof include natural graphite, artificial graphite, a mixture of natural graphite and artificial graphite, and natural graphite coated with artificial graphite. The shape of the negative electrode active material is not particularly limited, and examples thereof include a spherical shape. When the shape of the negative electrode active material is spherical, the average particle size (D ₅₀ ) of the negative electrode active material is, for example, 1 nm or more, 10 nm or more, or 100 nm or more. On the other hand, the average particle size (D ₅₀ ) of the negative electrode active material is, for example, 50 μm or less, and may be 20 μm or less.

The metal-organic framework contained in the negative electrode slurry contains a zirconium element. Here, the "metal-organic framework containing an element of zirconium" refers to a porous coordination network structure having a high surface area formed by the interaction of zirconium or its oxide and an organic ligand. .. The content of the zirconium element contained in the metal-organic framework is not particularly limited. The specific content of the zirconium element contained in the metal-organic framework is, for example, 2% by weight or more, or 4% by weight or more, based on the negative electrode active material. On the other hand, the content of the zirconium element contained in the metal-organic framework is, for example, 8% by weight or less, or 6% by weight or less, based on the negative electrode active material. Further, the content of the zirconium element contained in the metal-organic framework may be 5% by weight with respect to the negative electrode active material. Examples of the metal-organic framework used in the present disclosure include zirconium terephthalate, zirconium 2,6-naphthalenedicarboxylate, zirconium 4,4'-biphenyldicarboxylic acid and the like.

The surface of the negative electrode active material is coated with a metal-organic framework. The method of coating the negative electrode active material with the metal-organic framework is not particularly limited as long as the negative electrode active material coated with the metal-organic framework can be obtained. For example, the method described in the section of Examples described later can be mentioned.

The coverage of the metal-organic framework coated on the surface of the negative electrode active material is preferably higher, for example, 50% or more, and preferably 80% or more. Further, the coverage of the metal-organic framework may be 100%. When the surface of the negative electrode active material is sufficiently coated with the metal-organic framework, the reductive decomposition of the electrolytic solution can be effectively suppressed, and the increase in the amount of self-discharge can be further suppressed. The coverage of the metal-organic framework can be measured using, for example, a transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), or the like.

The thickness of the metal-organic framework coated on the surface of the negative electrode active material is, for example, 5 nm or more, and may be 10 nm or more. The thickness of the metal-organic framework is, for example, 200 nm or less, and may be 100 nm or less. The thickness of the metal-organic framework can be measured by, for example, observation with a transmission electron microscope (TEM) (for example, n ≧ 100) and calculated as an average value.

The negative electrode slurry may contain other components, if necessary. Examples of other components include binders and thickeners. Since the binder and the thickener can be the same as those generally known, the description here is omitted.

The negative electrode slurry contains a dispersion medium containing water. Here, the "dispersion medium containing water" is usually water, but may contain other components in addition to water. Examples of other components include general organic dispersion media. The ratio of water in all dispersion media is, for example, 50% by mass or more, 70% by mass or more, or 90% by mass or more, when the dispersion medium containing water is 100% by mass. Good.

The content of the dispersion medium contained in the negative electrode slurry can be appropriately adjusted and is not particularly limited. The solid content of the negative electrode slurry is, for example, 10% by weight or more, and may be 20% by weight or more. The solid content of the negative electrode slurry is, for example, 70% by weight or less, and may be 60% by weight or less.

The method for producing the negative electrode slurry is not particularly limited as long as it can obtain a negative electrode slurry containing a negative electrode active material coated with a metal-organic framework containing a zirconium element and a dispersion medium containing water. For example, a method of kneading the negative electrode active material and the dispersion medium can be mentioned.

(2) Method for Forming Negative Electrode Active Material Layer As a method for forming the negative electrode active material layer, a negative electrode slurry containing a negative electrode active material coated with a metal organic structure containing a zirconium element and a dispersion medium containing water is used. Any method can be used as long as it can form the negative electrode active material layer, and is not particularly limited. For example, as in the examples described later, a method of forming a negative electrode active material layer by applying a negative electrode slurry and further drying it can be mentioned. The specific coating method and drying method can be the same as those used in the general negative electrode active material layer forming step, and thus the description thereof is omitted here.

The thickness of the negative electrode active material layer varies greatly depending on the configuration of the battery, but is, for example, 0.1 μm or more and 1000 μm or less. Further, the content of the negative electrode active material in the negative electrode active material layer is preferably larger from the viewpoint of capacity, for example, 60% by weight or more, and preferably 70% by weight or more. Further, the content of the negative electrode active material in the negative electrode active material layer is, for example, 99% by weight or less, and may be 95% by weight or less. The negative electrode active material layer may contain additives such as a binder and a thickener, if necessary, in addition to the negative electrode active material.

2. Electrolyte layer forming step The method for producing a secondary battery of the present disclosure usually includes an electrolyte layer forming step formed between a negative electrode active material layer and a positive electrode active material layer to form an electrolyte layer having a non-aqueous electrolyte solution.

The non-aqueous electrolyte solution conducts metal ion conduction between the negative electrode active material layer and the positive electrode active material layer. The non-aqueous electrolytic solution typically exhibits a liquid state at room temperature (for example, 25 ° C.), and preferably always exhibits a liquid state within the operating temperature range (for example, −30 ° C. or higher and 60 ° C. or lower). The non-aqueous electrolyte solution in the present disclosure contains a fluorine-based solvent, and usually also contains a supporting salt.

Examples of the fluorine-based solvent include fluorinated carbonate. Specific examples of the fluorinated carbonate include monofluoroethylene carbonate (MFEC), difluoroethylene carbonate (DFEC), monofluoromethyldifluoromethyl carbonate (F-DMC), trifluorodimethyl carbonate (TFDMC), and trifluoroethylmethyl. Examples thereof include carbonate (TFEMC). As such a fluorine-based solvent, one type can be used alone, or two or more types can be used in combination as appropriate.

The supporting salt is appropriately selected according to the type of the target secondary battery. For example, in the case of a lithium ion battery, it is a supporting salt. Lithium salts include, for example, inorganic lithium salts such as _{LiPF 6} , LiBF ₄ , LiClO ₄ and LiAsF _{6 ; and LiCF 3} SO ₃ , LiN (CF ₃ SO ₂ ) ₂ , LiN (C ₂ F ₅ SO ₂ ) ₂ , LiC. (CF ₃ SO ₂ ) _{Organolithium salts such as 3 and the} like can be mentioned. Further, for example, in the case of a sodium ion battery, examples of the sodium salt as a supporting salt include inorganic sodium salts such as _{NaPF 6} , NaBF ₄ , NaClO ₄ and NaAsF _{6 ; and NaCF 3} SO ₃ and NaN (CF ₃ SO ₂ ). _2. Organic sodium salts such as NaN (C ₂ F ₅ SO ₂ ) ₂ and NaC (CF ₃ SO ₂ ) _{3 can be mentioned.}

The concentration of the supporting salt in the non-aqueous electrolytic solution is, for example, 0.3 mol / L or more, preferably 0.8 mol / L or more. This is because if the concentration of the supporting salt is too low, the capacity at high rate may decrease. On the other hand, the concentration of the supporting salt in the non-aqueous electrolytic solution is, for example, 5.0 mol / L or less, preferably 1.5 mol / L or less. This is because if the concentration of the supporting salt is too high, the viscosity may increase and the capacity at low temperature may decrease. As the non-aqueous electrolytic solution, a low volatile liquid such as an ionic liquid may be used.

The non-aqueous electrolytic solution may contain various additives such as a film-forming agent, a dispersant, and a thickener as other components. Since general materials can be used for these additives, the description here is omitted.

The method for forming the electrolyte layer using the non-aqueous electrolyte solution is not particularly limited as long as it is a method capable of obtaining a predetermined electrolyte layer.

3. 3. Positive Electrode Active Material Layer Forming Step The secondary battery manufacturing method of the present disclosure usually includes a positive electrode active material layer forming step of forming a positive electrode active material layer containing a positive electrode active material.

Examples of the positive electrode active material include LiMn ₂ O ₄ , LiCoO ₄ , LiNiO ₂ , LiNi _0.5 Mn _1.5 O _4, LiFePO _{4, and the} like. Examples of the binder used for the positive electrode layer include polyvinylidene fluoride (PVDF) and polytetrafluoroethylene (PTFE). The positive electrode active material layer may contain a conductive material, if necessary.

Since the method for forming the positive electrode active material layer can be the same as the general method for forming the positive electrode active material layer, the description here is omitted.

The thickness of the positive electrode active material layer varies greatly depending on the configuration of the battery, but is, for example, 0.1 μm or more and 1000 μm or less. Other matters concerning the positive electrode active material layer can be the same as those used for a general secondary battery, and are not particularly limited.

4. Secondary battery The secondary battery obtained by the method for manufacturing the secondary battery of the present disclosure includes a negative electrode active material layer having a negative electrode active material, a positive electrode active material layer having a positive electrode active material, the negative electrode active material layer, and the positive electrode. It suffices to have an electrolyte layer formed between the active material layers and having a non-aqueous electrolyte solution containing a fluorine-based solvent, but in addition, for example, a negative electrode current collector, a positive electrode current collector, and a separator. , Battery case, spacer, wave washer and other members.

As the negative electrode current collector, the same one as the negative electrode current collector used in a general secondary battery can be used. Examples of the negative electrode current collector include a foil obtained by processing a metal such as copper and nickel into a plate shape. Further, as the positive electrode current collector in the present disclosure, for example, a foil obtained by processing a metal such as aluminum or stainless steel into a plate shape can be mentioned.

The separator is a member having a function of separating the negative electrode active material layer and the positive electrode active material layer and holding a non-aqueous electrolytic solution. The separator can be the same as that used for a general secondary battery, and is not particularly limited. Examples of the separator include a porous membrane such as polyethylene and polypropylene.

The battery case, spacer, wave washer, etc. can be the same as the members used for a general secondary battery, and thus the description thereof is omitted here.

Examples of the secondary battery obtained by the present disclosure include a lithium ion battery, a sodium ion battery, a magnesium ion battery, a calcium ion battery and the like.

The secondary battery can be repeatedly charged and discharged, and is useful as, for example, an in-vehicle battery. The secondary battery also includes use as a primary battery (use for the purpose of discharging only once after charging).

The shape of the secondary battery is not particularly limited, and examples thereof include a coin type, a button type, a sheet type, a cylindrical type, and a square type.

Since the forming step for forming these members can be the same as the general forming method, the description here is omitted.

The present disclosure is not limited to the above embodiment. The above embodiment is an example, and any object having substantially the same structure as the technical idea described in the claims of the present disclosure and exhibiting the same effect and effect is the present invention. Included in the technical scope of the disclosure.

The present disclosure will be described in more detail with reference to Examples below.

[Example]
<Manufacturing of negative electrode>
Natural graphite was prepared as the negative electrode active material. Next, terephthalic acid and zirconium hydride were dissolved in water, and natural graphite was added thereto. After refluxing in an oil bath (temperature: 100 ° C.) for about 30 minutes, the dispersion medium was removed using an evaporator. In this way, the surface of the negative electrode active material (natural graphite) was coated with a metal-organic framework (zirconium terephthalate). Next, the obtained negative electrode active material, styrene-butadiene rubber (SBR) as a binder, and carboxymethyl cellulose (CMC) as a thickener were mixed with each other in a mass ratio of C: SBR: CMC = 98: 1: 1. Weighed so as to be, and mixed with water as a dispersion medium to prepare a negative electrode slurry. This negative electrode slurry was applied to the surface of a negative electrode current collector (copper foil), dried, and then pressed to prepare a negative electrode having a negative electrode active material layer on the negative electrode current collector.

<Cathode preparation>
_{NiMn spinel (LiNi 0.5} Mn _1.5 O ₄ , LNM) as the positive electrode active material, acetylene black (AB) as the conductive material, and polyvinylidene fluoride (PVdF) as the binder, LNM: AB: PVdF. Weighed so as to have a mass ratio of = 87: 10: 3, and mixed with N-methyl-2-pyrrolidone (NMP) to prepare a positive electrode slurry. This positive electrode slurry was applied to the surface of a positive electrode current collector (aluminum foil), dried, and then pressed to prepare a positive electrode having a positive electrode active material layer on the positive electrode current collector.

<Preparation of non-aqueous electrolyte solution>
_{LiPF 6} as a supporting salt is added to a mixed dispersion medium containing monofluoroethylene carbonate (MFEC) and trifluoroethyl methyl carbonate (TFEMC) as a fluorine-based solvent in a volume ratio of MFEC: TFEMC = 50: 50. It was dissolved to a concentration of 0.0 mol / L.

<Making secondary batteries>
The obtained negative electrode and positive electrode were opposed to each other with a separator sheet interposed therebetween, and were housed and sealed in a laminated battery case together with the non-aqueous electrolytic solution prepared as described above. In this way, the secondary battery of the present disclosure was produced.

[Comparative Example 1]
Except for the fact that the surface of the negative electrode active material was not coated with a metal-organic framework and N-methyl-2-pyrrolidone (NMP) was used as the dispersion medium used when preparing the negative electrode slurry, instead of water. A secondary battery was produced in the same manner as in Examples.

[Comparative Example 2]
A secondary battery was produced in the same manner as in Examples except that the surface of the negative electrode active material was not coated with a metal-organic framework.

[Comparative Example 3]
Lithium was used instead of zirconium as the metal contained in the metal-organic framework, and N-methyl-2-pyrrolidone (NMP) was used instead of water as the dispersion medium used when preparing the negative electrode slurry. A secondary battery was produced in the same manner as in Examples except for the above. The specific coating step was carried out as follows. That is, terephthalic acid and lithium hydroxide were dissolved in water, and natural graphite was added thereto. After refluxing in an oil bath (temperature: 100 ° C.) for about 30 minutes, the dispersion medium was removed using an evaporator. In this way, the surface of the negative electrode active material (natural graphite) was coated with a metal-organic framework (dilithium terephthalate).

[Comparative Example 4]
A secondary battery was produced in the same manner as in the examples except that lithium was used instead of zirconium as the metal contained in the metal-organic framework. Since the specific coating step is the same as that of Comparative Example 3, the description here is omitted.

[Comparative Example 5]
A secondary battery was produced in the same manner as in Examples except that N-methyl-2-pyrrolidone (NMP) was used as the dispersion medium used when preparing the negative electrode slurry, instead of water.

[Evaluation]
(High temperature storage test)
The secondary batteries obtained in Examples and Comparative Examples 1 to 5 were subjected to a high temperature storage test, and the voltage difference before and after storage was measured. A large voltage difference before and after storage means a large amount of self-discharge, while a small voltage difference before and after storage means a small amount of self-discharge. In the high temperature storage test, the battery is stored in an environment of 60 ° C. with 100% SOC, and the difference (voltage drop) between the voltage before storage and the voltage one week after storage is measured and evaluated. did. The results are shown in FIG.

The self-discharge amounts of Examples and Comparative Examples 1 to 5 were compared. As a result, as shown in FIG. 3, in Examples and Comparative Examples 3 to 5 in which the surface of the negative electrode active material was coated with the metal-organic framework (MOF), the surface of the negative electrode active material was not coated with the metal-organic framework. Compared with Comparative Examples 1 and 2, the increase in the amount of self-discharge could be suppressed. In particular, the effect was remarkable in the cases of Examples and Comparative Example 5 in which the metal contained in the metal-organic framework was zirconium. Next, the self-discharge amounts of Examples and Comparative Examples 3 to 5 in which the surface of the negative electrode active material was coated with a metal-organic framework (MOF) were examined. First, when Comparative Examples 3 and 4 in which the metal contained in the metal-organic framework was lithium were compared, as shown in FIG. 3, a dispersion medium was compared with Comparative Example 3 in which a solvent (NMP) was used as the dispersion medium. The amount of self-discharge of Comparative Example 4 using water as a solvent increased. It is considered that this is because the metal-organic framework is dissolved when water is used as the dispersion medium. On the other hand, when the examples in which the metal contained in the metal-organic framework is zirconium and Comparative Example 5 are compared, as shown in FIG. 3, the self-discharge amount of the example in which water is used as the dispersion medium is used as the dispersion medium. It was possible to suppress the increase as compared with the self-discharge amount of Comparative Example 5 using the solvent (NMP). Here, when water is used as the dispersion medium in the preparation step for preparing the negative electrode slurry, it is possible to suppress an increase in cost as compared with the case where the solvent is used as the dispersion medium. Therefore, in the examples using the method for manufacturing the secondary battery of the present disclosure, it was possible to suppress the increase in the self-discharge amount and the increase in the cost at the same time.

1 ... Negative electrode active material layer 2 ... Electrolyte layer 3 ... Positive electrode active material layer 4 ... Negative electrode current collector 5 ... Positive electrode current collector 10 ... Secondary battery

Claims (1)

It has a non-aqueous electrolyte solution formed between a negative electrode active material layer having a negative electrode active material, a positive electrode active material layer having a positive electrode active material, the negative electrode active material layer, and the positive electrode active material layer, and containing a fluorinated carbonate. A method for manufacturing a secondary battery having an electrolyte layer.
It has a negative electrode active material layer forming step of forming the negative electrode active material layer by using the negative electrode active material coated with the metal organic structure containing a zirconium element and the negative electrode slurry containing a dispersion medium containing water. How to manufacture the next battery.

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