JP5987792B2 - Air battery and manufacturing method thereof - Google Patents

Description

  The present invention relates to an air battery having a higher current density than the conventional one and a manufacturing method thereof.

  It is known that a material excellent in hydrophilicity and strength is used for a separator of an air battery. Patent Document 1 is characterized by comprising a fiber sheet-like material formed mainly by sulfonated easily sulfonated fibers containing a modified styrenic polymer component having a glass transition temperature lowered by 5 ° C. or more, and mainly comprising the sulfonated fibers. A battery separator is disclosed.

JP 7-278963 A

Patent Document 1 discloses an example in which a nonwoven fabric containing easily sulfonated fibers is immersed in a sulfuric acid solution at 80 ° C. and 97% for 20 minutes to sulfonate the nonwoven fabric. However, as is apparent from the above reaction conditions, it is necessary to react with concentrated sulfuric acid at a high temperature in order to impart sulfonic acid to the easily sulfonated fiber. Therefore, in order to manufacture the battery separator according to Patent Document 1, a manufacturing facility that can withstand high temperature conditions and concentrated sulfuric acid is required, and the manufacturing cost increases accordingly.
The present invention has been accomplished in view of the above circumstances, and an object thereof is to provide an air battery having a higher current density than the conventional one and a method for manufacturing the same.

  The air battery of the present invention is an air battery including at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode, wherein the electrolyte layer includes an electrolytic solution containing an ionic liquid, and a separator. The separator includes a separator base material and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid impregnated in the separator base material.

  An air battery manufacturing method of the present invention is an air battery manufacturing method including at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode, wherein the positive electrode, the negative electrode, and the ionic liquid are provided. Prepare electrolyte solution, separator substrate, and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid, and contact the separator substrate with poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid In this way, a separator is manufactured, and an air battery is manufactured by interposing the separator and the electrolyte between the positive electrode and the negative electrode.

  According to the present invention, by using a separator containing poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid, the wettability of the electrolyte with respect to the separator can be improved. Current density can be increased.

It is a figure which shows an example of the laminated constitution of the air battery of this invention, Comprising: It is the figure which showed typically the cross section cut | disconnected in the lamination direction. It is the bar graph which compared the contact angle of the electrolyte solution with respect to the separator of manufacture example 1, and the nonwoven fabric made from a polypropylene. It is the graph which piled up and showed the IV curve of Example 1 and Comparative Example 1. FIG.

1. Air battery The air battery of the present invention is an air battery including at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode, wherein the electrolyte layer includes an electrolyte solution containing an ionic liquid, and The separator includes a separator base material and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid impregnated in the separator base material.

In general, a lithium air battery using an ionic liquid as an electrolyte has a low current density during discharge. This is because the electrolyte solution using an ionic liquid has high viscosity, so that the wettability with the separator is poor, and the charge transfer between the electrolyte solution and the separator becomes non-uniform, resulting in low current density of discharge. Conceivable.
The present inventor considered that the wettability with respect to the ionic liquid can be improved by improving the separator, and conducted extensive research. As a result, it was found that wettability with an ionic liquid was improved by immersing the separator in poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT-PSS), and the present invention was completed. I let you.

FIG. 1 is a diagram showing an example of a layer configuration of an air battery according to the present invention, and is a diagram schematically showing a cross section cut in a stacking direction. In FIG. 1, double wavy lines indicate omission of the figure. The air battery of the present invention is not necessarily limited to this example.
The air battery 100 includes a positive electrode 6 including a positive electrode layer 2 and a positive electrode current collector 4, a negative electrode 7 including a negative electrode active material layer 3 and a negative electrode current collector 5, the positive electrode 6 and an electrolyte layer 1 sandwiched between the negative electrode 7; A battery case 8 that houses the positive electrode 6, the negative electrode 7, and the electrolyte layer 1 is also provided. In FIG. 1, there are portions where the positive electrode current collectors 4 are scattered, which indicates that the positive electrode current collectors 4 are in a mesh shape. Further, the battery case 8 has air holes so as to substantially overlap the mesh portion of the positive electrode current collector 4.
Hereinafter, the positive electrode, the negative electrode, and the electrolyte layer constituting the air battery of the present invention, and the battery case suitably used for the air battery of the present invention will be described in detail.

The positive electrode used in the present invention preferably includes a positive electrode layer, and generally further includes a positive electrode current collector and a positive electrode lead connected to the positive electrode current collector.
The positive electrode layer used in the present invention contains at least a conductive material. Furthermore, you may contain at least one of a catalyst and a binder as needed.

  The conductive material used in the present invention is not particularly limited as long as it has conductivity. For example, a carbon material, a perovskite-type conductive material, a porous conductive polymer, a metal porous body, etc. Can be mentioned. In particular, the carbon material may have a porous structure or may not have a porous structure, but in the present invention, the carbon material preferably has a porous structure. This is because the specific surface area is large and many reaction fields can be provided. Specific examples of the carbon material having a porous structure include mesoporous carbon. On the other hand, specific examples of the carbon material having no porous structure include graphite, acetylene black, carbon black, carbon nanotube, and carbon fiber. As content of the electroconductive material in a positive electrode layer, when the mass of the whole positive electrode layer is 100 mass%, for example, it is preferable that it is 10-99 mass%, especially 50-95 mass%. If the content of the conductive material is too small, the reaction field may decrease and the battery capacity may be reduced. If the content of the conductive material is too large, the content of the catalyst is relatively reduced and sufficient. This is because it may not be possible to exert a proper catalytic function.

Examples of the positive electrode catalyst used in the present invention include an oxygen active catalyst. Examples of oxygen active catalysts include, for example, platinum groups such as nickel, palladium and platinum; perovskite oxides containing transition metals such as cobalt, manganese or iron; inorganic compounds containing noble metal oxides such as ruthenium, iridium or palladium A metal coordination organic compound having a porphyrin skeleton or a phthalocyanine skeleton; manganese oxide and the like. The content ratio of the catalyst in the positive electrode layer is not particularly limited. For example, when the mass of the entire positive electrode layer is 100% by mass, it is 0 to 90% by mass, and particularly 1 to 90% by mass. preferable.
From the viewpoint that the electrode reaction is performed more smoothly, a catalyst may be supported on the conductive material described above.

  The positive electrode layer only needs to contain at least a conductive material, but further preferably contains a binder for fixing the conductive material. Examples of the binder include rubber resins such as polyvinylidene fluoride (PVdF), polytetrafluoroethylene (PTFE), and styrene / butadiene rubber (SBR rubber). The content ratio of the binder in the positive electrode layer is not particularly limited. For example, when the mass of the entire positive electrode layer is 100% by mass, it is 1 to 40% by mass, especially 1 to 10% by mass. It is preferable.

As a method for producing the positive electrode layer, for example, a method of mixing and rolling the raw material of the positive electrode layer containing the conductive material, or preparing a slurry by adding a solvent to the raw material, Although the method of apply | coating etc. is mentioned, it is not necessarily limited to these methods. Examples of the method for applying the slurry to the positive electrode current collector include known methods such as a spray method, a screen printing method, a doctor blade method, a gravure printing method, and a die coating method.
The thickness of the positive electrode layer varies depending on the use of the air battery and the like, but is preferably 2 to 500 μm, and particularly preferably 30 to 300 μm.

The positive electrode current collector used in the present invention collects current from the positive electrode layer. The material of the positive electrode current collector is not particularly limited as long as it has conductivity, and examples thereof include stainless steel, nickel, aluminum, iron, titanium, and carbon. Examples of the shape of the positive electrode current collector include a foil shape, a plate shape, and a mesh (grid) shape. Among these, in the present invention, it is preferable that the shape of the positive electrode current collector is a mesh shape from the viewpoint of excellent current collection efficiency. In this case, usually, a mesh-like positive electrode current collector is disposed inside the positive electrode layer. Furthermore, the air battery according to the present invention may include another positive electrode current collector (for example, a foil-shaped current collector) that collects electric charges collected by the mesh-shaped positive electrode current collector. In the present invention, a battery case to be described later may have the function of a positive electrode current collector.
The thickness of the positive electrode current collector is, for example, preferably 10 to 1,000 μm, and more preferably 20 to 400 μm.

  The negative electrode used in the present invention preferably includes a negative electrode active material layer containing a negative electrode active material, and generally further includes a negative electrode current collector and a negative electrode lead connected to the negative electrode current collector.

The negative electrode active material layer used in the present invention contains a negative electrode active material containing at least one selected from the group consisting of metal materials, alloy materials, and carbon materials. Specific examples of metals and alloy materials that can be used for the negative electrode active material include alkali metals such as lithium, sodium, and potassium; group 2 elements such as magnesium and calcium; group 13 elements such as aluminum; zinc, Examples include transition metals such as iron; alloys containing these metals; or compounds containing these metals such as metal oxides, metal nitrides, and metal sulfides.
Examples of the alloy containing lithium element include a lithium aluminum alloy, a lithium tin alloy, a lithium lead alloy, and a lithium silicon alloy. Moreover, as a metal oxide containing a lithium element, lithium titanium oxide etc. can be mentioned, for example. Examples of the metal nitride containing a lithium element include lithium cobalt nitride, lithium iron nitride, and lithium manganese nitride. In addition, lithium coated with a solid electrolyte can also be used for the negative electrode active material layer.

  The negative electrode active material layer may contain only the negative electrode active material, or may contain at least one of a conductive material and a binder in addition to the negative electrode active material. For example, when the negative electrode active material has a foil shape, a negative electrode active material layer containing only the negative electrode active material can be obtained. On the other hand, when the negative electrode active material is in a powder form, a negative electrode active material layer containing a negative electrode active material and a binder can be obtained. The type and content ratio of the binder are as described above.

  The conductive material contained in the negative electrode active material layer is not particularly limited as long as it has conductivity. For example, a carbon material, a perovskite-type conductive material, a porous conductive polymer, a metal porous body, etc. Can be mentioned. The carbon material may have a porous structure or may not have a porous structure. Specific examples of the carbon material having a porous structure include mesoporous carbon. On the other hand, specific examples of the carbon material having no porous structure include graphite, acetylene black, carbon nanotube, and carbon fiber.

  The material for the negative electrode current collector used in the present invention is not particularly limited as long as it has conductivity, and examples thereof include copper, stainless steel, nickel, and carbon. Of these, SUS and Ni are preferably used for the negative electrode current collector. Examples of the shape of the negative electrode current collector include a foil shape, a plate shape, and a mesh (grid) shape. In the present invention, a battery case, which will be described later, may have the function of a negative electrode current collector.

The electrolyte layer used in the present invention is held between the positive electrode layer and the negative electrode active material layer and has a function of exchanging metal ions between the positive electrode layer and the negative electrode active material layer.
The electrolyte layer includes an electrolytic solution containing an ionic liquid and a separator.

As the electrolytic solution, an ionic liquid itself may be used, or an aqueous electrolytic solution containing an ionic liquid, a non-aqueous electrolytic solution containing an ionic liquid, or the like may be used.
The ionic liquid used in the present invention is not particularly limited as long as it is an ionic liquid usually used in air batteries. For example, N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) amide (PP13TFSA) N-methyl-N-propylpyrrolidinium bis (trifluoromethanesulfonyl) amide (P13TFSA), N-butyl-N-methylpyrrolidinium bis (trifluoromethanesulfonyl) amide (P14TFSA), N, N-diethyl-N -Methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) amide (DEMETFSA), N, N, N-trimethyl-N-propylammonium bis (trifluoromethanesulfonyl) amide (TMPATFSA) and the like.
Of the ionic liquids, it is more preferable to use an ionic liquid that is stable to oxygen radicals. Examples of such ionic liquids include N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) amide (PP13TFSA), N-methyl-N-propylpyrrolidinium bis (trifluoromethanesulfonyl) amide ( P13TFSA), N-butyl-N-methylpyrrolidinium bis (trifluoromethanesulfonyl) amide (P14TFSA), N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) amide (DEMETFSA) and the like.

When the air battery of the present invention is a lithium air battery, the electrolytic solution usually contains a lithium salt. Examples of the lithium salt include inorganic lithium salts such as LiPF ₆ , LiBF ₄ , LiClO _4, and LiAsF ₆ ; LiCF ₃ SO ₃ , LiN (SO ₂ CF ₃ ) ₂ (Li-TFSA), LiN (SO ₂ C ₂ F ₅ ) ₂ and organic lithium salts such as LiC (SO ₂ CF ₃ ) ₃ . The concentration of the lithium salt in the electrolytic solution is, for example, 0.05 to 1 mol / kg.

  It is preferable that the type of the non-aqueous electrolyte containing the ionic liquid is appropriately selected according to the type of the metal ion to be conducted. For example, when the air battery of the present invention is a lithium air battery, the electrolytic solution usually contains an ionic liquid, a lithium salt, and a nonaqueous solvent. As said lithium salt, the said inorganic lithium salt, organic lithium salt, etc. can be mentioned. Examples of the non-aqueous solvent include ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), ethyl carbonate, butylene carbonate, γ-butyrolactone, and sulfolane. , Acetonitrile (AcN), dimethoxymethane, 1,2-dimethoxyethane (DME), 1,3-dimethoxypropane, diethyl ether, tetraethylene glycol dimethyl ether (TEGDME), tetrahydrofuran, 2-methyltetrahydrofuran, dimethyl sulfoxide (DMSO) and A mixture thereof can be exemplified.

It is preferable that the type of the aqueous electrolyte solution containing the ionic liquid is appropriately selected according to the type of metal ion to be conducted. For example, when the air battery of the present invention is a lithium air battery, the electrolytic solution usually contains an ionic liquid, a lithium salt, and water. Examples of lithium salts that can be used with water include lithium salts such as LiOH, LiCl, LiNO ₃ , and CH ₃ CO ₂ Li.

The separator used in the present invention may be referred to as poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (CAS No. 155090-83-8; hereinafter referred to as PEDOT-PSS) as the separator substrate. ).
The separator base material used for this invention will not be specifically limited if it is a material which has a hole of the grade which can be made to impregnate PEDOT-PSS. The separator base material itself may have a performance as a separator, or may function as a separator only after impregnation with PEDOT-PSS.
Examples of the separator substrate include porous membranes made of polyolefin such as polyethylene and polypropylene; and nonwoven fabrics made of resin such as polypropylene and nonwoven fabrics such as glass fiber nonwoven fabric. The thickness of the separator substrate is usually 20 to 150 μm.

The reason why the wettability with respect to the electrolytic solution containing the ionic liquid is improved by impregnating the separator base material with PEDOT-PSS is that when the PEDOT-PSS is applied to the separator base material, the interfacial tension with the electrolytic solution decreases. As a result, it is considered that the contact angle is reduced and wettability is improved.
As a result of the improvement of wettability as described above, the separator containing PEDOT-PSS becomes well compatible with the electrolyte containing the ionic liquid. As a result, the air battery of the present invention including the separator is more than the conventional air battery. Is excellent in IV characteristics, and the current density is particularly high.
The separator in the present invention is used as an electrolyte layer together with the above-described electrolytic solution. Although the thickness of an electrolyte layer will not be specifically limited if it is more than the thickness of the separator base material mentioned above, For example, 20-200 micrometers may be sufficient.

In general, the air battery of the present invention preferably includes a battery case that houses a positive electrode, a negative electrode, an electrolyte layer, and the like. Specific examples of the shape of the battery case include a coin type, a flat plate type, a cylindrical type, and a laminate type. The battery case may be an open-air battery case or a sealed battery case. An open-air battery case is a battery case having a structure in which at least the positive electrode layer can sufficiently come into contact with the atmosphere. On the other hand, when the battery case is a sealed battery case, it is preferable that a gas (air) introduction pipe and an exhaust pipe are provided in the sealed battery case. In this case, the gas to be introduced / exhausted preferably has a high oxygen concentration, more preferably dry air or pure oxygen. In addition, it is preferable to increase the oxygen concentration during discharging and decrease the oxygen concentration during charging.
An oxygen permeable film or a water repellent film may be provided in the battery case according to the structure of the battery case.

2. Air battery manufacturing method The air battery manufacturing method of the present invention is an air battery manufacturing method including at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode, the positive electrode and the negative electrode , An electrolytic solution containing an ionic liquid, a separator base material, and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid, and the separator base material is poly (3,4-ethylenedioxythiophene)- A separator is produced by contacting with polystyrene sulfonic acid, and an air battery is produced by interposing the separator and the electrolyte between the positive electrode and the negative electrode.

The positive electrode, the negative electrode, the electrolytic solution containing the ionic liquid, the separator base material, and the PEDOT-PSS are as described above. In addition, PEDOT-PSS may use a stock solution as it is, or may use a solution diluted with a solvent such as water or alcohol.
As a method for bringing the separator substrate into contact with PEDOT-PSS, a method in which the separator substrate is immersed in PEDOT-PSS, a method in which PEDOT-PSS is applied to the separator substrate, and a method in which PEDOT-PSS is sprayed on the separator substrate. Etc. can be illustrated. Among these, from the viewpoint that PEDOT-PSS can be impregnated to every corner of the separator base material, it is preferable to employ a method in which the separator base material is immersed in PEDOT-PSS.
When the separator substrate is immersed in PEDOT-PSS, the immersion time is preferably 5 minutes to 24 hours, and the temperature of PEDOT-PSS is preferably 10 to 30 ° C.
A method of forming an air battery using a positive electrode, a negative electrode, a separator, and an electrolytic solution is the same as that in the past. The positional relationship between the separator and the electrolytic solution in the electrolyte layer is not particularly limited. For example, in the electrolyte layer, (1) the electrolyte layer may be mainly in contact with the negative electrode and the separator may be mainly in contact with the positive electrode, or (2) the electrolyte solution layer may be mainly in contact with the positive electrode and the separator may be in the negative electrode. Or (2) the separator may be disposed in the vicinity of the center of the electrolyte layer in the thickness direction without contacting either the positive electrode or the negative electrode.
As mentioned above, in the manufacturing method of this invention, since a separator is produced by making a separator base material contact PEDOT-PSS, it can manufacture with simple equipment and can reduce manufacturing cost.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

1. Production of separator [Production Example 1]
A polypropylene nonwoven fabric was prepared as a separator substrate. The polypropylene nonwoven fabric was immersed in poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT-PSS, manufactured by Aldrich) for 30 minutes at room temperature (15-30 ° C.). Thereafter, the nonwoven fabric made of polypropylene was taken out from PEDOT-PSS and dried appropriately to produce the separator of Production Example 1.

2. Production of lithium-air battery [Example 1]
First, ketjen black (manufactured by KetjenBlack International, ECP600JD) was prepared as a conductive material, and PTFE (manufactured by Daikin Industries, Ltd.) was prepared as a binder. These materials were mixed so that the content ratio was ketjen black: PTFE = 90% by mass: 10% by mass, rolled by a roll press, and dried to produce a positive electrode layer.
As the positive electrode current collector, 100 mesh (manufactured by Nilaco Corporation) made of SUS304 was prepared.
SUS304 foil (manufactured by Nilaco Corporation) was prepared as a negative electrode current collector, and lithium metal (manufactured by Honjo Metal) was bonded to one side of the SUS foil to prepare a negative electrode.

N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) amide (manufactured by Kanto Chemical Co., Ltd., DEMETFSA), lithium bis (trifluoromethanesulfonyl) amide (Kishida Chemical Co., Ltd.) Manufactured, LiTFSA) was dissolved to a concentration of 0.32 mol / kg to obtain an electrolytic solution.
The separator of Production Example 1 was used as the separator. The electrolyte layer was obtained by immersing the electrolyte in the separator of Production Example 1.
In order to prevent bubbles from entering the electrolyte layer, the negative electrode current collector, lithium metal, electrolyte layer, positive electrode layer, and positive electrode current collector are arranged in this order from the lower side in the gravity direction by the positive electrode and the negative electrode. The lithium-air battery of Example 1 was manufactured. All the above steps were performed in a glove box under a nitrogen atmosphere.
The lithium air battery of Example 1 was placed in an electrochemical cell. Pure oxygen (manufactured by Taiyo Nippon Sanso Corporation, purity: 99.9%) was introduced into the lithium-air battery of Example 1.

[Comparative Example 1]
In Example 1, a positive electrode layer, a positive electrode current collector, a negative electrode, and an electrolyte layer were used in the same manner as in Example 1 except that a polypropylene nonwoven fabric itself was used as a separator instead of the separator of Production Example 1. A lithium air battery of Comparative Example 1 was produced. Note that pure oxygen was introduced into the lithium-air battery of Comparative Example 1 in the same manner as the lithium-air battery of Example 1.

3. Contact angle measurement About the separator of the manufacture example 1 and the polypropylene nonwoven fabric which is the raw material, the contact angle was measured using the droplet method, and the wettability of each material was evaluated. Details of the measurement are as follows.
Contact angle measuring device: Automatic contact angle meter (trade name: DM-301, manufactured by Kyowa Interface Science Co., Ltd.)
Electrolytic solution: a solution in which LiTFSA is dissolved in DEMETFSA to a concentration of 0.32 mol / kg

FIG. 2 is a bar graph comparing the contact angle of the electrolytic solution with respect to the separator of Production Example 1 and the nonwoven fabric made of polypropylene.
As can be seen from FIG. 2, the contact angle of the electrolyte solution with respect to the nonwoven fabric made of polypropylene is 50 °, whereas the contact angle of the electrolyte solution with respect to the separator of Production Example 1 is 46 °. From this result, the polypropylene nonwoven fabric (Production Example 1) treated with PEDOT-PSS has a smaller contact angle of 4 ° than the polypropylene nonwoven fabric before treatment, and the wettability is improved by the PEDOT-PSS treatment. I understand that

4). IV measurement About the lithium air battery of Example 1 and the comparative example 1, after leaving still for 3 hours in a 60 degreeC thermostat, IV measurement was implemented on condition of the following.
Charge / Discharge IV measurement device: Multi-channel potentiostat / galvanostat (trade name: VMP3, manufactured by Bio-Logic)
Current application time / rest time 30 minutes / 0.1 seconds Battery temperature: 60 ° C
Battery pressure: 1 atmosphere Atmosphere: pure oxygen

FIG. 3 is a graph in which the IV curves of Example 1 and Comparative Example 1 are superimposed. FIG. 3 is a graph in which the vertical axis represents voltage (V) and the horizontal axis represents current density (mA / cm ² ).
As can be seen from FIG. 3, the lithium-air battery of Example 1 exhibits a higher voltage than the lithium-air battery of Comparative Example 1 over almost the entire range of current density. In particular, the difference becomes noticeable under high current density conditions. For example, the voltage of Comparative Example 1 is 2.4 V under the current density of 0.2 mA / cm ² , whereas the voltage of Example 1 Is as high as 2.65V. Further, under the condition where the current density is 0.3 mA / cm ² , the voltage of Comparative Example 1 is 2.3V, while the voltage of Example 1 is as high as 2.6V.
Thus, it is considered that the reason why Example 1 is superior to Comparative Example 1 in IV characteristics is that in the separator, the wettability with respect to the electrolytic solution was improved by the PEDOT-PSS treatment.

DESCRIPTION OF SYMBOLS 1 Electrolyte layer 2 Positive electrode layer 3 Negative electrode active material layer 4 Positive electrode collector 5 Negative electrode collector 6 Positive electrode 7 Negative electrode 8 Battery case 100 Air battery

Claims (2)

An air battery comprising at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode,
The electrolyte layer includes an electrolytic solution containing an ionic liquid, and a separator,
The separator includes a separator base material and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid impregnated in the separator base material. A method for producing an air battery comprising at least a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode,
Preparing the positive electrode, the negative electrode, an electrolyte containing an ionic liquid, a separator substrate, and poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid;
Producing a separator by contacting the separator substrate with poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid; and
An air battery manufacturing method comprising manufacturing the air battery by interposing the separator and the electrolyte between the positive electrode and the negative electrode.