JP2002203602A - Electrolyte component holding separator, its way of use and its manufacturing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolyte component holding separator which also serves as polymer gel electrolyte of excellent characteristics as well as to provide ways of use and a manufacturing method. SOLUTION: A porous support body is made to hold electrolyte components consisting of a polymer or a polymer and electrolyte salt so as to cover 10 to 90% of the surface, to obtain an electrolyte component holding separator. A polymer gel electrolyte complex separator is obtained by filling electrolyte solution in such an electrolyte component holding separator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator which also functions as a polymer gel electrolyte having excellent characteristics, that is, a separator carrying an electrolyte component which can be used as a polymer gel electrolyte composite separator, and its use and its production.

[0002]

2. Description of the Related Art In recent years, solid electrolytes widely used in electrochemical devices are substances having a high ionic conductivity in a solid state. Among them, a solid polymer electrolyte using a polymer substance as a solid has recently been developed. As an electrolyte for a next-generation lithium-ion secondary battery, it has attracted special attention, and research is being promoted worldwide. Such a polymer solid electrolyte has a greater degree of freedom in terms of its shape, such as no risk of liquid leakage and a thin film, as compared with a conventional electrolyte solution.

[0003] However, conventionally known non-aqueous polymer solid electrolytes have a problem that their electric conductivity is remarkably lower than that of an electrolyte solution. For example, a non-aqueous polymer solid electrolyte obtained by complexing a polymer such as a chain polymer such as polyethylene glycol or polypropylene glycol or a comb polymer such as polyphosphazene with an electrolyte salt has been known. At room temperature, 10 ^-3 S /
cm is not found.

Therefore, in recent years, various non-aqueous polymer gel electrolytes have been studied for practical use. According to this study, at room temperature, the electrolyte has an electric conductivity of 10 ⁻³ S / cm or more and is close to an electrolyte solution. Things have been suggested. Such a polymer gel electrolyte is obtained by dissolving an electrolyte salt in a gel formed by a polymer and a non-aqueous organic solvent that do not necessarily interact with the electrolyte salt, and the polymer or its precursor is dissolved together with the electrolyte salt. It can be obtained by dissolving in an organic solvent and then gelling.

As described above, the polymer gel electrolyte has high ionic conductivity, but its mechanical strength is not sufficient and there are various obstacles in practical use. I have.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the polymer gel electrolyte, and furthermore, a separator which also serves as a polymer gel electrolyte having excellent properties,
With the aim of providing an electrolyte component-carrying separator that can be a polymer gel electrolyte composite separator,
It is another object of the present invention to provide a method of using and manufacturing such an electrolyte component-carrying separator.

[0007]

According to the present invention, a polymer or an electrolyte component comprising the polymer and an electrolyte salt is supported on a porous support so as to occupy 10 to 90% of the surface area. An electrolyte component-carrying separator is provided.

Further, according to the present invention, there is provided an electrochemical element in which the electrolyte component-carrying separator is sandwiched between a positive electrode and a negative electrode, wound or laminated.

Further, according to the present invention, there is provided a battery using the above-mentioned electrochemical device.

According to the present invention, a coating solution obtained by dissolving a polymer or an electrolyte component comprising the polymer and an electrolyte salt in a solvent is coated on a porous support by 10 to 90% of its surface area. After coating so as to occupy the solvent, the solvent is removed, and the polymer or the electrolyte component composed of the polymer and the electrolyte salt is supported on a porous support. Is provided.

Further, according to the present invention, an electrolyte component-supporting separator comprising a polymer or an electrolyte component comprising the polymer and an electrolyte salt supported on a porous support so as to occupy 10 to 90% of the surface area thereof. The method for producing a polymer gel electrolyte composite separator is characterized in that a polymer gel electrolyte is formed by filling an electrolyte solution into the separator.

In particular, according to the present invention, there is provided a method for producing a polymer gel electrolyte composite separator using a crosslinkable polymer as the polymer.

That is, according to the present invention, a cross-linkable polymer or an electrolyte component comprising the cross-linkable polymer and an electrolyte salt is supported on a porous support so as to occupy 10 to 90% of the surface area. A method for producing a polymer gel electrolyte composite separator is provided, which comprises filling an electrolyte solution in an electrolyte component-carrying separator and crosslinking the crosslinkable polymer to form a polymer gel electrolyte.

Further, according to the present invention, there is provided a method of manufacturing a battery using the above-described separator carrying an electrolyte component.

That is, according to the present invention, an electrolyte component-supporting separator comprising a polymer or an electrolyte component comprising the polymer and an electrolyte salt supported on a porous support so as to occupy 10 to 90% of its surface area. Is sandwiched between a positive electrode and a negative electrode, wound or laminated to form an electrochemical element, and the electrochemical element is housed in a battery container. A method for producing a battery, comprising forming a molecular gel electrolyte, is provided.

According to the present invention, a cross-linkable polymer or an electrolyte component comprising the cross-linkable polymer and an electrolyte salt is supported on a porous support so as to occupy 10 to 90% of the surface area. An electrolyte component-carrying separator is sandwiched between a positive electrode and a negative electrode, wound or laminated to form an electrochemical element, the electrochemical element is housed in a battery container, and the electrochemical element is filled with an electrolytic solution. In addition, there is provided a method for producing a battery, comprising forming a polymer gel electrolyte by crosslinking the crosslinkable polymer.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The separator carrying an electrolyte component according to the present invention comprises a polymer or an electrolyte component comprising this polymer and an electrolyte salt, which is coated on a porous support with a surface area of 10%.
It is supported so as to occupy ~ 90%. Here, as described below, the porous support refers to a sheet-like porous membrane, a nonwoven fabric, or the like, and the surface area refers to the front and back surface areas.

According to the present invention, the polymer includes:
Although not particularly limited, for example, polyacrylate, polymethacrylate, polyethylene oxide, polypropylene oxide, polyethylene propylene oxide, polyvinyl ether, polyphosphazene, polysiloxane, polyvinylidene fluoride, polyvinyl chloride, polyacrylonitrile, polyester, and the like Can be mentioned. These polymers may have appropriate side chains.

However, particularly in the present invention, the polymer is preferably a crosslinkable polymer having a polymerizable reactive group in the molecule. Examples of such a crosslinkable polymer include, for example, a chain polymer or oligomer structure such as a polyalkylene oxide in a main chain or a side chain, and a comb polymer or oligomer structure such as polyphosphazene.
Those having a plurality of polymerizable reactive groups in the molecule, for example, a vinyl group or a (meth) acryloyl group, for example, polyalkylene glycol poly (meth) acrylate can be given. Here, (meth) acrylate means acrylate or methacrylate.

Preferred specific examples of the polyalkylene glycol poly (meth) acrylate include, for example, polyethylene glycol di (meth) acrylate,
Examples include polyethylene glycol propylene glycol di (meth) acrylate.

The electrolyte salt depends on the use and required characteristics of the electrolyte component-supporting separator according to the present invention. Examples of the electrolyte salt include hydrogen ions, ions of alkali metals such as lithium, sodium and potassium, calcium and strontium. Alkaline earth metal ions, tertiary or quaternary
Grade ammonium ion as a cationic component, for example, inorganic acids such as hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, tetrafluoroboric acid, hydrofluoric acid, hexafluorophosphoric acid, perchloric acid, organic carboxylic acids, and fluorine-substituted organic acids Salts containing an organic acid such as carboxylic acid, organic sulfonic acid, or fluorine-substituted organic sulfonic acid as an anion component can be used. Among these, an electrolyte salt containing an alkali metal ion as a cation component is particularly preferably used.

Specific examples of such an electrolyte salt containing an alkali metal ion as a cation component include, for example, alkali metal perchlorates such as lithium perchlorate, sodium perchlorate and potassium perchlorate, and tetrafluoroboric acid. Lithium, sodium tetrafluoroborate, alkali metal tetrafluoroborate such as potassium tetrafluoroborate, lithium hexafluorophosphate, alkali metal hexafluorophosphate such as potassium hexafluorophosphate,
Examples thereof include alkali metal trifluoroacetates such as lithium trifluoroacetate and alkali metal trifluoromethanesulfonates such as lithium trifluoromethanesulfonate.

According to the present invention, a coating solution is prepared by dissolving the above polymer or an electrolyte component comprising the polymer and such an electrolyte salt in a solvent, and the solution is applied to a porous support. Thereafter, for example, by heating to remove the solvent, an electrolyte component-carrying separator in which the polymer or the electrolyte component composed of the polymer and the electrolyte salt is supported on a porous support is obtained.

In particular, when the above-mentioned crosslinkable polymer is used as the polymer, usually 0.1% to several% by weight of the polymerization initiator is added together with the crosslinkable polymer to the solvent together with the electrolyte salt. To make a coating solution.

The above-mentioned solvent is preferably an organic solvent. As such an organic solvent, if the above-mentioned polymer (or its precursor) is dissolved, and if an electrolyte salt is used together with the polymer, the electrolyte may be used. It is not particularly limited as long as it also dissolves the salt, for example,
Cyclic esters such as ethylene carbonate, propylene carbonate, butylene carbonate and γ-butyrolactone; ethers such as tetrahydrofuran and dimethoxyethane; chain esters such as dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate;
-Methyl-2-pyrrolidone, acrylonitrile, sulfolane, dimethylsulfoxide, formamide, dimethylacetamide. In addition, alcohols and water can be used as needed. These may be used alone or as a mixture of two or more.

In such a coating solution, the proportion of the polymer is not particularly limited, but may be a solvent 1
With respect to 00 parts by weight, it is in the range of 0.1 to 50 parts by weight,
When the electrolyte salt is used together with the polymer, the proportion of the electrolyte component is not particularly limited, but is usually in the range of 0.1 to 50 parts by weight with respect to 100 parts by weight of the solvent.

According to the present invention, as the porous support,
When used as a separator, it is possible to prevent a short circuit between the positive electrode and the negative electrode, and to have a communication hole in order to cause an electrochemical reaction between the two electrodes,
Although not particularly limited, for example, a nonwoven fabric containing polyolefin or polyamide as a main component, a polyolefin, a porous film made of polytetrafluoroethylene, or the like,
Electrolytic paper or the like using a natural or synthetic material such as manila hemp or kraft material can be used.

According to the present invention, the above-mentioned coating solution is applied to a porous support in the range of 10 to 90% of its surface area, and then, for example, heated to remove the above-mentioned solvent. To obtain an electrolyte component-carrying separator.

In the electrolyte component-carrying separator according to the present invention, the porous support has a surface area of 1%.
The electrolyte component is supported in the range of 0 to 90%. In other words, even after the porous support supports the electrolyte component, a part of the porous support is exposed as it is. Therefore, according to the electrolyte component-carrying separator of the present invention, when the electrolyte solution is filled into the separator, the electrolyte solution easily and quickly permeates and diffuses throughout the porous support, and is pre-supported on the porous support. Together with the said polymer (with electrolyte salt)
A separator also serving as a polymer gel electrolyte having excellent properties, that is, a polymer gel electrolyte composite separator is formed.

When a crosslinkable polymer is used as the polymer, the obtained electrolyte component-carrying separator is filled with an electrolytic solution, and then this electrolyte component-carrying separator is heated, preferably with the aid of a polymerization initiator. The crosslinkable polymer is crosslinked, and thus a separator also serving as a polymer gel electrolyte, that is, a polymer gel electrolyte composite separator can be obtained.

Thus, the electrolyte component-carrying separator according to the present invention is sandwiched between a positive electrode and a negative electrode, wound or laminated to form an electrochemical element, which is filled with an electrolytic solution, and as a polymer, When a cross-linkable polymer is used, thereafter, the cross-linkable polymer is heated, and preferably, the cross-linkable polymer is cross-linked with the aid of a polymerization initiator, whereby a polymer gel electrolyte composite having excellent properties is formed. A separator-electrode composite can be obtained, and a battery having excellent performance can be obtained by using such a polymer gel electrolyte composite separator-electrode composite.

The means and method for applying the coating solution to the porous support so as to occupy 10 to 90% of the surface area thereof are not particularly limited. For example, screen printing, letterpress printing, Gravure printing, dot coating, and the like can be used. Further, after the coating solution is applied to the porous support, the solvent may be removed by an appropriate means such as heating or drying under reduced pressure. Depending on the solvent used, for example, when heating to remove the solvent, usually
The heating may be performed under normal pressure at a temperature of 40 to 200 ° C, preferably 40 to 80 ° C, for 5 seconds to 1 hour.

The electrolyte component-carrying separator according to the present invention can be suitably used for manufacturing batteries and capacitors. For example, as described above, the electrolyte component-carrying separator according to the present invention is sandwiched between the positive electrode and the negative electrode, wound or laminated to form an electrochemical element, and preferably, this is dried under reduced pressure to obtain a small amount of water. After removing the oxygen and oxygen, charge the battery container, fill the electrochemical element with an electrolytic solution, form a polymer gel electrolyte with the polymer (and electrolyte salt) in the electrolyte component, and seal the battery container. You can get a battery.

When an electrolyte component-carrying separator carrying the crosslinkable polymer as a polymer is prepared, the electrolyte component-carrying separator is sandwiched between a positive electrode and a negative electrode, wound or laminated, and Chemical element,
Preferably, this is dried under reduced pressure to remove a small amount of moisture and oxygen, charged in a battery container, filled with an electrolytic solution in the electrochemical element, and thereafter, the crosslinkable polymer is heated,
Preferably, a polymer gel electrolyte composite separator-electrode complex having excellent properties can be obtained by crosslinking a crosslinkable polymer with the aid of a polymerization initiator, and such a polymer gel electrolyte can be obtained. By using the composite separator-electrode composite, a battery with excellent performance can be obtained.

As described above, the separator carrying the electrolyte component according to the present invention can be used for primary batteries, secondary batteries, electrolytic capacitors,
It can be suitably used for manufacturing electric double layer capacitors and the like.

[0036]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited by these examples.

Example 1 (Preparation of electrolyte component-carrying separator) 5.00 g of polyethylene glycol dimethacrylate (Blenmer PDE-400 manufactured by NOF Corporation) and 0.67 g of lithium perchlorate
And benzoyl peroxide (0.02 g) were dissolved in acrylonitrile (19.33 g) to obtain a uniform and transparent coating solution.

A polyethylene resin porous membrane (25 μm thick)
m, porosity 41%, average pore size 0.1 μm)
After applying the coating solution at a rate of one application point having a radius of 1 mm (± 20%) in a square of 2.5 mm × 2.5 mm,
Heat at 1 ° C. for 1 minute to evaporate the solvent. Such point application of the coating solution is applied to both sides of the porous membrane,
An electrolyte component-carrying separator according to the present invention was produced. The ratio of the supporting area of the electrolyte component in the porous membrane was 50% of the surface area.

(Preparation of Positive Electrode Sheet) Lithium cobaltate, graphite powder and polyvinylidene fluoride resin were mixed at a weight ratio of 8
The mixture was mixed at 5: 10: 5, added to N-methyl-2-pyrrolidone, and stirred to prepare a slurry. This slurry is applied to the surface of an aluminum foil (current collector),
After heating and drying to remove the solvent, the roll was pressed with a roll press to produce a 200 μm thick positive electrode sheet.

(Preparation of Negative Electrode Sheet) Graphite powder and polyvinylidene fluoride resin were mixed at a weight ratio of 95: 5, and this was charged into N-methyl-2-pyrrolidone and stirred to prepare a slurry. This slurry was applied to the surface of a copper foil (current collector), heated and dried to remove the solvent, and then pressed by a roll press to produce a 200 μm-thick negative electrode sheet.

(Preparation of electrolyte solution) Ethylene carbonate /
1 mol of lithium perchlorate as an electrolyte salt was added to a solvent consisting of a mixture of ethyl methyl carbonate at a weight ratio of 1/1.
/ L to obtain an electrolyte solution.

(Production of Battery) The above-mentioned separator carrying an electrolyte component was sandwiched between the above-mentioned positive electrode sheet and negative electrode sheet to form an electrochemical element. After sealing the battery container using a machine, the container was heated to 90 ° C., kept for 2 hours, and then allowed to cool to room temperature, thereby producing three coin-type batteries.

The capacity of these three coin batteries was measured by a battery charging / discharging device (TOSCAT manufactured by Toyo System Co., Ltd.), and the average value was 5.4 mAh. Thus, after measuring the capacity, when the coin-type battery was disassembled, the electrolyte was fixed as a polymer gel electrolyte, and no leakage of the electrolyte was observed between the elements or in the free space of the coin-type battery. Was.

Example 2 A mixture of 5.58 g of ethylene carbonate and 8.48 g of ethyl methyl carbonate was used as a solvent, and a mixture of ethylene oxide / propylene oxide copolymer (polyethylene glycol propylene glycol) diacrylate 5.
Then, 00 g and 0.05 g of 2,2′-azobisisobutyronitrile as a polymerization initiator were added, and the mixture was heated and stirred at 50 ° C. to obtain a uniform and transparent coating solution.

On the surface of the same polyethylene resin porous membrane as in Example 1, a square of 2.5 mm × 2.5 mm and a radius of 0.5
The coating solution was applied at one application point of mm (± 20%), and then heated at 80 ° C. for 1 minute to evaporate the solvent. Such a point application of the coating solution was applied to both sides of the porous membrane to prepare an electrolyte component-carrying separator according to the present invention. The ratio of the supporting area of the electrolyte component in the porous membrane was 50% of the surface area.

The separator supporting the electrolyte component was sandwiched between the same positive electrode sheet and negative electrode sheet as in Example 1 to form an electrochemical element, which was accommodated in a battery container, and the element was filled with the electrolytic solution, and caulked. After sealing the battery container using a machine, the container was heated to 90 ° C., kept for 2 hours, and then allowed to cool to room temperature, thereby producing three coin-type batteries.

The capacity of these three coin batteries was 5.5 mAh on average. After the capacity measurement, when the coin-type battery was disassembled, the electrolyte was fixed as a polymer gel electrolyte, and no leakage of the electrolyte was observed between the elements or in the free space of the coin-type battery.

Example 3 A coin-type battery was prepared in the same manner as in Example 1 except that a nonwoven fabric made of polypropylene was used as the porous support, and that the ratio of the area for supporting the electrolyte component in this nonwoven fabric was 70% of the surface area. Were produced. The capacity of these three coin batteries was 5.4 mAh on average. After the capacity measurement, when the coin-type battery was disassembled, the electrolyte was fixed as a polymer gel electrolyte, and no leakage of the electrolyte was observed between the elements or in the free space of the coin-type battery.

Example 4 The same coating solution as in Example 2 was screened on the same porous membrane as in Example 1 using a stainless steel mold having a thickness of 50 μm, a pitch of 2 mm, and a straight hole of 0.2 mm in diameter. Print and 8
Dry at 0 ° C. for 1 minute and evaporate the solvent. Screen printing of such a coating solution was performed on both sides of the porous membrane to produce an electrolyte component-carrying separator according to the present invention. The ratio of the supporting area of the electrolyte component in the porous membrane was 23% of the surface area.

This electrolyte component-carrying separator was used in Example 1.
After sandwiching between the same positive electrode sheet and negative electrode sheet as in the above, an electrochemical element was placed in a battery container, the element was filled with the electrolytic solution, and the battery container was sealed using a caulking machine. , And kept for 2 hours, and then allowed to cool to room temperature to produce three coin-type batteries.

The capacity of these three coin-type batteries was 5.4 mAh on average. After the capacity measurement, when the coin-type battery was disassembled, the electrolyte was fixed as a polymer gel electrolyte, and no leakage of the electrolyte was observed between the elements or in the free space of the coin-type battery.

Comparative Example 1 The same coating solution as in Example 2 was applied to the entire surface of the same porous membrane as in Example 1 using a doctor blade (thickness setting: 50 μm), and dried at 80 ° C. for 1 minute. And the solvent was evaporated. The entire surface of such a coating solution was applied to both surfaces of the porous membrane to produce an electrolyte component-carrying separator.

This electrolyte component-carrying separator was used in Example 1.
After sandwiching between the same positive electrode sheet and negative electrode sheet as in the above, an electrochemical element was placed in a battery container, the element was filled with the electrolytic solution, and the battery container was sealed using a caulking machine. , And kept for 2 hours, and then allowed to cool to room temperature to produce three coin-type batteries.

The capacity of these three coin-type batteries was 3.3 mAh on average. After the capacity measurement, when the coin-type battery was disassembled, the electrolyte was fixed as a polymer gel electrolyte, and no leakage of the electrolyte was observed between the elements or in the free space of the coin-type battery.

Comparative Example 2 The same porous membrane as in Example 1 was used as a separator without supporting the electrolyte component on the same porous membrane. This separator was sandwiched between the same positive electrode sheet and negative electrode sheet as in Example 1 to form an electrochemical element, which was accommodated in a battery container, the element was filled with the electrolytic solution, and the battery container was caulked using a caulking machine. It sealed and produced three coin type batteries.

The capacity of these three coin-type batteries was 5.4 mAh on average. After the capacity measurement, when the coin-type battery was disassembled, leakage of the electrolyte was observed between the elements and in the free space of the coin-type battery.

[0057]

The electrolyte component-carrying severator according to the present invention has an electrolyte component supported on the surface of a porous support so as to occupy 10 to 90% of its surface area, and is filled with an electrolyte solution. A separator which also functions as a polymer gel electrolyte having excellent characteristics can be provided. In addition, according to the electrolyte component-carrying severator of the present invention, the separator is sandwiched between a positive electrode and a negative electrode, wound or laminated to form an electrochemical element, which is then filled with an electrolytic solution, and the separator is filled with a polymer. Since the function of the gel electrolyte is provided, an electrode-polymer gel electrolyte composite separator having a desired shape can be formed. Excellent adhesion between electrode and polymer gel electrolyte.

In particular, according to the present invention, if a crosslinkable polymer or an electrolyte component composed of this crosslinkable polymer and an electrolyte salt is supported on a porous support to form an electrolyte component-supporting separator, the electrolytic component can be used as an electrolyte. By filling the solution and crosslinking the crosslinkable polymer, a polymer gel electrolyte containing the crosslinked polymer as a polymer component can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01M 6/22 H01G 9/00 301D (72) Inventor Takashi Yamamura 1-1-2 Shimohozumi, Ibaraki-shi, Osaka No. Nitto Denko F-term (reference) 5H024 AA01 AA12 GG01 GG08 HH01 5H029 AJ15 AK03 AL07 AM00 AM16 BJ03 BJ12 BJ14 CJ11 CJ12 DJ09 DJ13 HJ07

Claims (8)

[Claims] 1. A porous support comprising a polymer or an electrolyte component comprising the polymer and an electrolyte salt having a surface area of 1%.
An electrolyte component-supporting separator which is supported so as to occupy 0 to 90%. 2. An electrochemical device comprising the electrolyte component-supporting separator according to claim 1 sandwiched between a positive electrode and a negative electrode, wound or laminated. 3. A battery using the electrochemical device according to claim 2. 4. A coating solution obtained by dissolving a polymer or an electrolyte component comprising the polymer and an electrolyte salt in a solvent is applied to a porous support so as to occupy 10 to 90% of its surface area. The method for producing an electrolyte component-supporting separator according to claim 1, wherein the solvent is removed, and the polymer or the electrolyte component comprising the polymer and the electrolyte salt is supported on a porous support. . 5. A porous support comprising a polymer or an electrolyte component comprising the polymer and an electrolyte salt having a surface area of 1%.
A method for producing a polymer gel electrolyte composite separator, comprising filling an electrolyte solution into an electrolyte component-carrying separator supported so as to occupy 0 to 90% to form a polymer gel electrolyte. 6. An electrolytic component-supporting separator comprising a cross-linkable polymer or an electrolyte component comprising the cross-linkable polymer and an electrolyte salt supported on a porous support so as to occupy 10 to 90% of its surface area. Fill the liquid,
A method for producing a polymer gel electrolyte composite separator, comprising forming a polymer gel electrolyte by crosslinking the crosslinkable polymer. 7. A porous support comprising a polymer or an electrolyte component comprising the polymer and an electrolyte salt having a surface area of 1%.
An electrolyte component supporting separator supported so as to occupy 0 to 90% is sandwiched between a positive electrode and a negative electrode, wound or laminated to form an electrochemical element, and the electrochemical element is housed in a battery container. A method for producing a battery, comprising filling the electrochemical element with an electrolytic solution to form a polymer gel electrolyte. 8. An electrolyte component-supporting separator comprising a crosslinkable polymer or an electrolyte component comprising the crosslinkable polymer and an electrolyte salt supported on a porous support so as to occupy 10 to 90% of the surface area of the porous support. And between the negative electrode,
Winding or laminating to form an electrochemical element, accommodating the electrochemical element in a battery container, filling the electrochemical element with an electrolytic solution, and crosslinking the crosslinkable polymer to form a polymer gel A method for producing a battery, comprising forming an electrolyte.