JP2001222909A - Ionic conductive resin for solid electrolyte, ionic conductive resin composition for solid electrolyte and solid electrolyte and battery using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid electrolyte ionic conductive resin and a resin compo sition having high ionic conductivity and high mechanical strength together, and a solid electrolyte and a battery using the same. SOLUTION: An ionic conductive resin for solid electrolyte contains an ionic conductive resin polymerized with one or more of monomers selected from a group of monomers expressed by the following general formula 1. Formula 1 where, R1 represents an alkyl or alkyl fluoride group with 10 or less hydrogens and carbons and n represents a natural number equal to or below 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion conductive resin for a solid electrolyte, an ion conductive resin composition for a solid electrolyte, a solid electrolyte and a battery using the same, and more particularly, to a capacitor, a fuel cell, and a secondary battery. The present invention relates to an ion conductive resin and a resin composition suitably used for a battery, a binder for a polymer battery electrode mainly using lithium ions, an electrolyte, and the like, and a solid electrolyte and a battery using the same.

[0002]

2. Description of the Related Art In recent years, with the reduction in size and weight of electronic devices, there is an increasing expectation for secondary batteries having smaller and lighter power sources and higher energy densities. As a small and lightweight secondary battery with high energy density,
For example, lithium batteries, especially non-aqueous lithium secondary batteries, are well known.

[0003] The structure of a lithium secondary battery is composed of both positive and negative electrodes and an electrolyte filling between the two electrodes. The positive and negative electrodes are composed of an active material that absorbs and discharges lithium during charging and discharging. It is contained dispersed in a binder, and further, in the positive electrode, a conductive auxiliary is contained dispersed in the binder, and the current collector made of a metal plate or the like is laminated in a film form by means such as coating. Structure.

Conventionally, as the electrolyte, a liquid electrolyte, particularly an organic electrolyte in which an ionic compound is dissolved, has been used. However, the breakdown of peripheral devices due to leakage or gas generation, the rupture of batteries, Since there is a risk of ignition and elution of electrode materials, safety valves and PTs are usually installed on batteries and battery packs.
A C element, a protection circuit, and the like are provided. Under such circumstances, it is desired to further improve the reliability of the lithium battery, and an all-solid-state lithium battery using a solid polymer electrolyte instead of a liquid electrolyte has been developed.

[0005] As the polymer solid electrolyte for the secondary battery, a small and light-weight thin battery having a high energy density (thickness per unit cell is 100 to 500) is particularly preferable.
μm), it is necessary to reduce the thickness of the solid electrolyte in order to reduce the internal resistance. For example,
JP-A-10-130487 discloses a polymer solid electrolyte film obtained by using a polyether copolymer as an ion conductive polymer, dissolving the same in acetonitrile, mixing a soluble electrolyte solution, and coating the mixture. Is disclosed. However, the polymer solid electrolyte film disclosed in the above publication has problems such as insufficient ionic conductivity near room temperature and cannot achieve the intended purpose.

JP-A-11-510308 discloses two first monomers having acryloyl functionality, one first monomer having acryloyl functionality, and one monomer having allyl functionality. Formed by polymerizing a second monomer having a carbonate functionality or a cyan functionality selected from the group consisting of: and a third monomer selected from the group having an acryloyl functionality and an oligo (oxyethylene) group Disclosed are a solid polymer electrolyte in which a salt is incorporated in a crosslinked terpolymer network to be obtained, and a gel-type solid polymer electrolyte in which LiPF ₆ and a plasticizer composed of ethylene carbonate and propylene carbonate are incorporated in the crosslinked terpolymer network.

[0007] However, the solid polymer electrolyte disclosed in the above-mentioned publication still cannot sufficiently achieve ionic conductivity and high mechanical strength, and cannot achieve its intended purpose. In addition, when the gel-type solid polymer electrolyte is left at a temperature higher than room temperature, the gel-type solid polymer electrolyte component may be volatilized or leaked, and the ionic conductivity may be reduced.

The present inventors have intensively studied to obtain an ion conductive resin for a solid electrolyte having both high ion conductivity, high mechanical strength and long-term stability, and have obtained a phenoxy polyethylene glycol acrylate represented by the formula (1): They have found that a polymer containing a polymerizable derivative in a specific range can greatly contribute to the above-mentioned properties, and have completed the present invention.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an ion-conductive resin for a solid electrolyte, which has both high ion conductivity and high mechanical strength, a resin composition, and a resin composition. A solid electrolyte and a battery using the same.

[0010]

According to the first aspect of the present invention, there is provided an ion conductive resin for a solid electrolyte, wherein at least one selected from the group of monomers represented by the following general formula (1) is polymerized. It contains a conductive resin.

[0011]

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(Wherein, R ¹ represents hydrogen, an alkyl group having 10 or less carbon atoms or a fluorinated alkyl group, and n represents a natural number of 20 or less)

[0013] The ion conductive resin for a solid electrolyte according to the second aspect of the present invention comprises one or more monomers selected from the group consisting of monomers represented by the following general formula (1) and two (meth) compounds in the molecule. It contains an ion conductive resin copolymerized with at least one selected from the group of monomers having an acryloyl group.

[0014]

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(Wherein, R ¹ represents hydrogen, an alkyl group having 10 or less carbon atoms or a fluorinated alkyl group, and n represents a natural number of 20 or less)

According to a third aspect of the present invention, there is provided the ion conductive resin for a solid electrolyte according to the second aspect, wherein the monomer having two (meth) acryloyl groups in the molecule is: It is a compound represented by the following general formula (2) or (3).

[0017]

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[0018]

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(Wherein, R ² and R ³ each represent hydrogen, an alkyl group having 10 or less carbon atoms or an alkyl fluoride group, and a, b, c and (a + b) each represent a natural number of 20 or less. Represents)

According to a fourth aspect of the present invention, there is provided an ion conductive resin composition for a solid electrolyte comprising the ion conductive resin for a solid electrolyte according to the first, second or third aspect and a plasticizer.

According to a fifth aspect of the present invention, there is provided the ion conductive resin composition for a solid electrolyte according to the fourth aspect, wherein the plasticizer is represented by the following general formula (4). Is a compound that is

[0022]

Embedded image

[Wherein, m represents a natural number of 20 or less;
N + 5 or less shown in the general formula (1)]

The solid electrolyte of the invention according to claim 6 is an ion-conductive resin for a solid electrolyte according to claim 1, 2, or 3, or an ionic conductive resin composition for a solid electrolyte according to claim 4 or 5, And a compound.

According to a seventh aspect of the present invention, there is provided the solid electrolyte according to the sixth aspect, wherein the ionic compound is a lithium salt.

An eighth aspect of the present invention provides a battery using the solid electrolyte according to the sixth or seventh aspect.

In the monomer represented by the above general formula (1) in the present invention, if the number n of repeating units of the oxyethylene chain involved in ion conduction exceeds 20, the mechanical properties of the obtained solid electrolyte membrane will be poor. Since the ion conductivity is lowered and the ion conductivity is lowered, the content is limited to the above range. Preferably 3 ≦ n ≦
12 and more preferably 5 ≦ n ≦ 9.

The R ¹ group at the α-position of the acryloyl group of the monomer represented by the above general formula (1) is hydrogen, having 10 carbon atoms.
It is selected from the following alkyl groups or fluorinated alkyl groups having 10 or less carbon atoms. If the number of carbon atoms of the alkyl group or the fluorinated alkyl group is too large, the interaction with lithium ions is reduced, and the ionic conductivity is reduced. Preferably, these have no more than 4 carbon atoms.

The ion conductive resin for a solid electrolyte of the present invention is obtained by polymerizing one or more monomers selected from the group consisting of the monomers represented by the above general formula (1). In addition to the above, it may be obtained by copolymerizing one or more monomers selected from the group of monomers having two (meth) acryloyl groups in the molecule.

The monomer having two (meth) acryloyl groups in the molecule is preferably a compound represented by the above formula (2) or (3). In the compound represented by the general formula (2) or (3),
When the number n of repeating units of the oxyethylene chain involved in ion conduction represented by a, b, (a + b) and c exceeds 20, the mechanical properties of the obtained solid electrolyte membrane decrease, and Since the conductivity is reduced, the range is limited to the above range.

The R ² or R ³ group at the α-position of the acryloyl group of the monomer represented by the general formula (2) or (3) is hydrogen, an alkyl group having 10 or less carbon atoms or a carbon number. It is selected from 10 or less fluorinated alkyl groups. If the number of carbon atoms of the alkyl group or the fluorinated alkyl group is too large, the interaction with lithium ions is reduced, and the ionic conductivity is reduced. Preferably, these have no more than 4 carbon atoms.

These monomer compositions are appropriately selected according to the desired performance of the solid electrolyte. Means for obtaining the ion conductive resin for a solid electrolyte from the above monomer is not particularly limited. For example, a monomer represented by the general formula (1) or a monomer represented by the general formula (2) or (3) may be used. A method of adding a polymerization initiator to the monomer to be added, and applying light or heat to perform polymerization.

The solid electrolyte of the present invention contains the above-mentioned ion-conductive resin for a solid electrolyte, and is a resin composition containing the above-mentioned ion-conductive resin for a solid electrolyte and a plasticizer. You may. The plasticizer is preferably a compound represented by the general formula (4). In the compound represented by the general formula (4), the number of repeating units of the oxyethylene chain involved in ionic conduction represented by m is 2
If it exceeds 0, the mechanical properties of the obtained solid electrolyte membrane will be reduced, and the ionic conductivity will be reduced. Preferably, 3 ≦ m ≦ 12, and more preferably, 5 ≦ m ≦ 9.

M is the number of repeating units of the oxyethylene chain in the monomer represented by the general formula (1), (2) or (3), and n, a, b or c. In this connection, m <a, m <b, m <c, and m ≦ (n + m) from the compatibility with the obtained ion conductive resin for solid electrolyte.
5) is preferable.

The solid electrolyte of the present invention comprises the above-mentioned ion conductive resin for solid electrolyte or the ion conductive resin composition for solid electrolyte, and an ionic compound. There is no particular limitation. For example, an ionic compound or an ionic compound and a plasticizer represented by the general formula (4) may be added during the polymerization of the ion conductive resin for a solid electrolyte. A method for incorporating into the ion conductive resin for the solid electrolyte,
A method in which an ionic compound or an ionic compound and a plasticizer represented by the above formula (4) are kneaded with the polymerized ion conductive resin for a solid electrolyte may be used.

The ionic compound is preferably a lithium salt. Although it does not specifically limit as said lithium salt, For example, lithium hexafluorophosphate, lithium borofluoride, lithium hexafluoroarsenate, lithium perchlorate etc. are mentioned.

(Mol number of lithium salt) / (total mole number of ether oxygen in oxyethylene chain in ion conductive resin for solid electrolyte, hereinafter simply referred to as total mole number of ether oxygen). The concentration of the above lithium salt is preferably 0.01 to 0.05. If the concentration of the lithium salt is less than 0.01, the number of carriers is small and the ionic conductivity is reduced. If the concentration is more than 0.05, lithium ions become pseudo-crosslinking points and the ionic conductivity is reduced.

The solid electrolyte of the present invention is formed into various shapes in accordance with its use, and the forming means is not particularly limited, but is formed into a thin film by a coating method such as a solution casting method. The molding method is a preferred method for obtaining a solid electrolyte having excellent physical properties.

The thickness of the solid electrolyte is determined according to the intended solid electrolyte and is not particularly limited. However, if the thickness is too small, the handleability is inferior. If the thickness is too large, the workability decreases. Therefore, preferably 25 to 10
It is about 0 μm.

The ion conductive resin for a solid electrolyte or the ion conductive resin composition for a solid electrolyte of the present invention can also be used as a positive and negative electrode material. Examples of the means for preparing the electrode include, for example, a paste obtained by mixing a monomer, a plasticizer, a polymerization initiator, and an electrode active material constituting the ion conductive resin for a solid electrolyte or the ion conductive resin composition for a solid electrolyte of the present invention. And a method in which this is applied to a metal foil such as a copper foil, an aluminum foil, or a nickel foil as a current collector in a thin film state, and polymerized and cured by heat or light.

The above-mentioned electrode active material is not particularly limited. As the positive electrode active material, for example, LiCoO 2
₂ , LiNiO ₂ , composite oxides in which part or all of Co or Ni in the above compounds are substituted with a metal such as Mn, and the like, and examples of the negative electrode active material include polymer fibers, aromatic compounds, and heterogeneous compounds. Examples include carbon compounds and carbon powders obtained by firing isotropic pitch at a high temperature. In addition, a conductive material such as carbon black, a metal powder, or a metal oxide powder may be added to the electrode material as needed in order to enhance ion conductivity.

The battery of the present invention incorporates an electrode and / or a solid electrolyte made of the solid electrolyte prepared by using the ion conductive resin for a solid electrolyte or the ion conductive resin composition for a solid electrolyte. . Means for producing the battery is not particularly limited, but, for example, a positive electrode and a negative electrode are stacked in a battery case by stacking a plurality of sheets via a solid electrolyte or spirally wound and stacked. Method and the like. Next, the stacked positive and negative electrodes are connected in parallel or in series according to the target electromotive force, and the terminal end is guided to a terminal outside the battery case by a lead wire.

The ion conductive resin for a solid electrolyte according to the first aspect of the present invention has both high ion conductivity and high mechanical strength, and a battery using the same as an electrode binder or a solid electrolyte has a high capacity and a high energy. It shows density and good cycle characteristics, and can be reduced in size and weight. In particular, it is used as a secondary battery such as a lithium polymer battery as a power source for various electronic devices, and can provide a remarkable effect. . Since the above properties include an ion conductive resin in which the monomer represented by the general formula (1) is polymerized, flexibility and ion mobility are determined by the presence of a phenyl group linked to the oxyethylene chain. It is presumed to be due to having a free volume suitable for dispersing and containing a plasticizer for increasing the water content.

The ion conductive resin for a solid electrolyte according to the second and third aspects of the present invention has a further excellent mechanical strength in addition to the effects of the ion conductive resin for a solid electrolyte according to the first aspect of the present invention. It can be expressed. The above property is that the monomer represented by the general formula (1) and the monomer represented by the general formula (2) or (3) having two (meth) acryloyl groups in a molecule are copolymerized. It is thought that since it contains the ion-conductive resin described above, the mechanical strength can be enhanced by intramolecular and / or intermolecular crosslinking.

The ionic conductive resin composition for a solid electrolyte according to the fourth and fifth aspects of the present invention has high ionic conductivity and high mechanical strength, similarly to the ionic conductive resin for a solid electrolyte of the preceding aspect. In particular, it is excellent in flexibility, excellent in processability, and improves heat resistance and high-temperature storage property.Batteries using this as an electrode binder or solid electrolyte have high capacity and high energy density. And good cycle characteristics, and can be reduced in size and weight.
In particular, it is used as a secondary battery such as a lithium polymer battery as a power source for various electronic devices, and can provide remarkable effects.

The plasticizer represented by the general formula (4) strongly dissociates a lithium salt due to the presence of an aromatic ring composed of a polar group such as a sulfonic acid ester group and a tolyl group, Is presumed to improve the compatibility of the plasticizer due to the interaction with the phenyl group of the ion-conductive resin, suppress bleed-out, and improve the heat resistance and the high-temperature storage property of the battery.

The solid electrolyte of the invention according to claims 6 and 7 is an ion-conductive resin for a solid electrolyte according to claims 1 to 3 or an ion-conductive resin composition for a solid electrolyte according to claim 4 or 5. Product and an ionic compound such as a lithium salt, so that the various functions of the ion-conductive resin for a solid electrolyte or the ion-conductive resin composition for a solid electrolyte of the invention described in the preceding paragraphs are the same. Can be played.

Since the battery according to the eighth aspect of the present invention is configured as described above, it has high capacity, high energy density and good cycle characteristics as described in the preceding sections, and has a small size. It can be reduced in weight and is used as a power source for various electronic devices, and can provide a remarkable effect.

[0049]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1 <Preparation of Negative Electrode> 41.2 parts by weight of coke (“MBC-N” manufactured by Mitsubishi Chemical Corporation), 4.8 parts by weight of acetylene carbon black, and 3.0 parts by weight 4. parts of polyacrylonitrile (POLY Science, average molecular weight 150,000);
An equimolar amount of 7 parts by weight of LiPF ₆ and 45.3 parts by weight of a plasticizer [triethylene glycol methyl ether (manufactured by Aldrich) and paratoluenesulfonic acid chloride (manufactured by Wako Pure Chemical Industries, Ltd.) were added in pyridine at 0 ° C. The kneaded product of the plasticizer belonging to the general formula (4), m = 3] obtained by the reaction
30 mm thick on a 5.4 mm x 38.1 mm copper foil
A negative electrode was prepared by hot pressing at 0 μm. The carbon loading of the obtained negative electrode was 19 mg / cm ² .

<Preparation of Positive Electrode> 50.9 parts by weight of LiC
oO ₂ , 5.1 parts by weight of acetylene carbon black, 2.5 parts by weight of polyacrylonitrile, 5.1 parts by weight of LiPF ₆ , and 36.4 parts by weight of a plasticizer (the plasticizer used in the negative electrode) 22.2 mm x 3)
250μ thickness on 4.9mm aluminum foil
m to obtain a negative electrode. The amount of LiCoO ₂ charged in the obtained positive electrode was 37 mg / cm ² .

<Preparation of Solid Electrolyte Membrane> Phenoxypolyethylene glycol acrylate [Shin-Nakamura Chemical Co., Ltd .;
MP-60G, a polymerizable compound of the above general formula (1), n = 6] 13.5 parts by weight and ethylene oxide-modified bisphenol A diacrylate [manufactured by Shin-Nakamura Chemical Co., Ltd.
"A-BPE-20", a polymerizable compound of the above general formula (2), a + b = 20] 3 parts by weight, a plasticizer (same as the plasticizer used for the positive and negative electrodes) 71.4 parts by weight, and benzoyl A mixture of 1.1 parts by weight of peroxide and 11 parts by weight of LiPF ₆ was formed into a 38 mm × 50 mm size having a thickness of 100 μm and heated at 70 ° C. for 8 minutes to produce a solid electrolyte membrane.

<Production of Battery> FIG. 1 is a plan view showing an example of the battery of the present invention produced using the battery material prepared as described above, and FIG. It is sectional drawing in a line. The positive electrode 1 and the negative electrode 2 are laminated with the solid electrolyte membrane 3 interposed therebetween, sealed in an aluminum battery case having polyvinylidene fluoride laminated inside together with an inert gas, together with an inert gas collector. 11
Then, the tips of the lead wires 12 and 22 were taken out of the battery case from above and 21 and the opening was thermally fused to produce a battery having a solid electrolyte membrane area of 7.76 cm ² . 13 and 23
Are the positive and negative electrode active material layers.

<Evaluation of Battery> The obtained battery was subjected to a charge / discharge cycle at a constant current. Both the charging current and the discharging current were 0.52 mA / cm ^2, which was the same. This battery was charged to 4.2V at room temperature (20 ° C) and 2.7V
Until discharge. Table 1 shows the voltage characteristics.

<High Temperature Storage Property of Battery> The obtained battery was exposed to an atmosphere at a temperature of 80 ° C. and a relative humidity of 80% for 20 days, and the presence or absence of leakage from the battery case was examined. Was decomposed, and the presence or absence of separation of low molecular weight components in the battery case was visually observed and tested. The test results are shown in Table 2.

(Example 2) In producing a solid electrolyte membrane, (poly) ethylene glycol diacrylate [manufactured by Shin-Nakamura Chemical Co., Ltd., "NK Ester A" was used instead of the ethylene oxide-modified bisphenol A diacrylate used in Example 1. -600 ", a polymerizable compound of the general formula (3), c = 14], except that 3 parts by weight were used.
Positive and negative electrodes and a solid electrolyte membrane were produced in the same manner as described above, and a battery was produced using these. The obtained battery was obtained in Example 1.
Was evaluated as well. The evaluation results are shown in Tables 1 and 2.

(Example 3) In producing the positive and negative electrodes and the solid electrolyte membrane, a plasticizer [Example 1] was used in place of the plasticizer used in Example 1 (m = 3 in the above formula (4)).
A plasticizer was prepared using polyethylene glycol methyl ether (manufactured by Aldrich, number average molecular weight 350) instead of the triethylene glycol methyl ether used in the above. In the above general formula (4), m = 7] A positive / negative electrode and a solid electrolyte membrane were produced in the same manner as in Example 1 except that the same parts by weight were used, and a battery was produced using these. The obtained battery was evaluated in the same manner as in Example 1. The evaluation results are shown in Tables 1 and 2.

Example 4 In preparing a solid electrolyte membrane, phenoxy polyethylene glycol acrylate [Shin Nakamura Chemical Co., Ltd., “A” was used instead of phenoxy polyethylene glycol acrylate (n = 6) used in Example 1.
MP-90G ", a polymerizable compound of the above general formula (1), n = 9] except that the same parts by weight were used, to produce a positive / negative electrode and a solid electrolyte membrane in the same manner as in Example 1. A battery was produced using the above. The obtained battery was evaluated in the same manner as in Example 1. The evaluation results are shown in Tables 1 and 2.

(Example 5) In producing both positive and negative electrodes,
4.5 parts by weight of phenoxy polyethylene glycol acrylate [manufactured by Shin-Nakamura Chemical Co., Ltd., “AMP-60G”, polymerizable compound of the above general formula (1), n = 6] in place of the polyacrylonitrile used in Example 1 0.6 parts by weight of ethylene oxide-modified bisphenol A diacrylate [manufactured by Shin-Nakamura Chemical Co., Ltd., "A-BPE-20", a polymerizable compound of the general formula (2), a + b = 20], and benzoyl peroxide 1 8 parts at 70 ° C.
A battery was fabricated in the same manner as in Example 1, except that the positive and negative electrodes were fabricated by heating for minutes. The obtained battery was evaluated in the same manner as in Example 1. The evaluation results are shown in Tables 1 and 2.

(Comparative Example 1) In preparing a solid electrolyte membrane, 13.5 parts by weight of methoxyhexaethylene glycol acrylate (“AM-60G” manufactured by Shin-Nakamura Chemical Co., Ltd.) and (poly) ethylene glycol diacrylate [Shin-Nakamura A battery was produced in the same manner as in Example 1, except that 3 parts by weight of “NK ester A-600”, a polymerizable compound of the general formula (3), c = 14], manufactured by Chemical Industries, Ltd., were used.
The obtained battery was evaluated in the same manner as in Example 1. The evaluation results are shown in Tables 1 and 2.

(Comparative Example 2) In producing a solid electrolyte membrane, 2-ethoxyethyl acrylate, acrylonitrile and tri (ethylene glycol) dimethacrylate were mixed at a weight ratio of 5.88: 1.88: 1.00. To 16.5 parts by weight of the monomer solution, 71.4 parts by weight of an ethylene carbonate / propylene carbonate mixture,
And benzoyl peroxide 1.1 parts by weight, LiPF ₆ 1
A battery was produced in the same manner as in Example 1, except that 1 part by weight of the mixture was molded and heated at 70 ° C. for 8 minutes to produce a solid electrolyte membrane. The obtained battery was evaluated in the same manner as in Example 1. The evaluation results are shown in FIG.

[0062]

[Table 1]

[0063]

[Table 2]

[0064]

The ionic conductive resin for a solid electrolyte according to the first aspect of the present invention is excellent in ionic conductivity and mechanical strength because it is constituted as described above, and is used as an electrode binder or a solid electrolyte. The batteries used are compact and lightweight batteries that exhibit high capacity, high energy density, and good cycle characteristics, and are used as power sources for various electronic devices as secondary batteries such as lithium polymer batteries, and can produce significant effects. It is.

Since the ion conductive resin for a solid electrolyte according to the second and third aspects of the present invention is constructed as described above, all of the excellent ion conductive resins for the solid electrolyte according to the invention according to the preceding aspect are produced. In addition to the effect, it has particularly excellent mechanical strength.

The ion conductive resin composition for a solid electrolyte according to the fourth and fifth aspects of the present invention is constituted as described above. In addition to the effects, it exhibits particularly excellent ion conductivity and heat resistance, and further has excellent flexibility and excellent workability.

Since the solid electrolyte according to the present invention is constructed as described above, it has the effects described in the preceding paragraphs. Since the battery used as the electrolyte shows high capacity, high energy density and good cycle characteristics,
It can be reduced in size and weight, and is particularly used as a secondary battery such as a lithium polymer battery as a power source for various electronic devices, and can provide remarkable effects.

Since the battery according to the eighth aspect of the present invention is configured as described above, it has high capacity, high energy density and good cycle characteristics as described in each of the preceding sections, and has a small size. It can be reduced in weight and is used as a power source for various electronic devices, and can provide a remarkable effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a battery of the present invention with a battery case removed.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Positive electrode 2 Negative electrode 3 Solid electrolyte membrane 11, 21 Current collector 12, 22 Lead wire 13 Positive electrode active material layer 23 Negative electrode active material layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08F 299/02 C08F 299/02 5H029 C08K 5/42 C08K 5/42 C08L 33/14 C08L 33/14 55/00 55 / 00 H01B 1/12 H01B 1/12 Z H01M 8/02 H01M 8/02 P 8/10 8/10 10/40 10/40 BF term (reference) 4J002 BG071 BQ001 DE187 DE197 DH047 DK007 EV246 FD026 FD207 GQ00 4J027 AC03 AC06 AJ08 BA19 CA10 CA26 CB03 CC02 CD01 4J100 AL08P AL66Q BA08P BA08Q BC43P BC45Q CA01 CA04 JA43 5G301 CA30 CD01 5H026 AA06 EE18 5H029 AJ06 AM16

Claims (8)

[Claims] 1. An ion conductive resin for a solid electrolyte, comprising an ion conductive resin obtained by polymerizing at least one selected from the group of monomers represented by the following general formula (1). Embedded image (In the formula, R ¹ represents hydrogen, an alkyl group having 10 or less carbon atoms or a fluorinated alkyl group, and n represents a natural number of 20 or less.) 2. One or more selected from the group of monomers represented by the following general formula (1) and one or more selected from the group of monomers having two (meth) acryloyl groups in the molecule: An ion-conductive resin for a solid electrolyte, characterized by containing an ion-conductive resin copolymerized with a resin. Embedded image (In the formula, R ¹ represents hydrogen, an alkyl group having 10 or less carbon atoms or a fluorinated alkyl group, and n represents a natural number of 20 or less.) 3. The compound according to claim 2, wherein the monomer having two (meth) acryloyl groups in the molecule is a compound represented by the following general formula (2) or (3). Ion conductive resin for solid electrolyte. Embedded image Embedded image (Wherein R ² and R ³ each represent hydrogen, an alkyl group having 10 or less carbon atoms or a fluorinated alkyl group, and a, b, c
And (a + b) each represent a natural number of 20 or less. 4. An ion-conductive resin composition for a solid electrolyte, comprising the ion-conductive resin for a solid electrolyte according to claim 1, 2 or 3, and a plasticizer. 5. The ion conductive resin composition for a solid electrolyte according to claim 4, wherein the plasticizer is a compound represented by the following general formula (4). Embedded image [In the formula, m represents a natural number of 20 or less, and is n + 5 or less shown in the general formula (1).] 6. An ionic compound comprising the ionic conductive resin for a solid electrolyte according to claim 1, 2 or 3, or the ionic conductive resin composition for a solid electrolyte according to claim 4 or 5. Characterized solid electrolyte. 7. The solid electrolyte according to claim 6, wherein the ionic compound is a lithium salt. 8. A battery comprising the solid electrolyte according to claim 6 or 7.