JP2010262876A - Air cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cell capable of preventing invasion of water and suppressing deterioration of performance. <P>SOLUTION: The air cell is equipped with a power generating portion equipped with a porous air electrode, a metal containing negative electrode, and an electrolyte layer having an electrolyte in charge of conduction of ions between the air electrode and the negative electrode, and a cabinet to house the power generating portion. The negative electrode is arranged and installed downward the air electrode, the electrolyte layer is arranged and installed between the air electrode and the negative electrode, a fluorine based solvent is arranged and installed on the upper face of the air electrode, and the electrolyte layer prevents invasion of the fluorine based solvent. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air battery.

  The air battery is a battery using oxygen as a positive electrode active material, and takes in air from the outside during discharge. Therefore, it is possible to increase the proportion of the negative electrode active material in the battery container as compared with other batteries having positive and negative electrode active materials in the battery. Therefore, in principle, the electric capacity that can be discharged is large, and it is easy to reduce the size and weight. Further, since the oxidizing power of oxygen used as the positive electrode active material is strong, the battery electromotive force is relatively high. Furthermore, since oxygen has a feature that it is a clean material without resource restrictions, the air battery has a small environmental load. As described above, the air battery has many advantages, and is expected to be used for a hybrid vehicle battery, a portable device battery, and the like.

  In an air battery (metal-air battery) in which metal is used for the negative electrode, for example, when alkali metal is used for the negative electrode, water and alkali metal may react when water enters the battery. When water and an alkali metal react, it is anticipated that an air battery will deteriorate. Therefore, in order to suppress deterioration of the air battery, it is important to prevent water from entering the air battery.

  In an air battery, an electrolyte (electrolytic solution or solid electrolyte) contained in an electrolyte layer accommodated between a positive electrode (hereinafter referred to as “air electrode”) and a negative electrode is interposed between the air electrode and the negative electrode. Responsible for ion conduction in And in order to take out electric energy from an air battery, it is required for ion to move an electrolyte layer. Therefore, in order to improve the performance of the air battery, it is important to have a form in which ions easily move in the electrolyte layer.

  As a technique relating to such an air battery, for example, Patent Document 1 includes an air electrode, a metal negative electrode, and a hydrophobic nonaqueous electrolyte, and the hydrophobic nonaqueous electrolyte includes trimethylpropylammonium bis (trifluoromethylsulfonyl). An air battery using an imide is disclosed.

JP 2005-116317 A

  According to the technique disclosed in Patent Document 1, it is considered that water can be prevented from entering because the hydrophobic non-aqueous electrolyte is used. However, the hydrophobic non-aqueous electrolyte disclosed in Patent Document 1 has a problem that the performance of the air battery is likely to be lowered because of low ionic conductivity.

  Then, this invention makes it a subject to provide the air battery which can prevent permeation of water and can suppress the fall of performance.

In order to solve the above problems, the present invention takes the following means. That is,
The present invention accommodates a power generation unit including a porous air electrode, a negative electrode containing a metal, and an electrolyte layer having an electrolyte that conducts ions between the air electrode and the negative electrode, and the power generation unit. A housing, a negative electrode is disposed below the air electrode, an electrolyte layer is disposed between the air electrode and the negative electrode, a fluorine solvent is disposed on the upper surface of the air electrode, and the electrolyte layer is The air battery is configured to prevent entry of a fluorine solvent.

  Here, “the fluorine solvent is disposed on the upper surface of the air electrode” means that the fluorine solvent is disposed so that the fluorine solvent exists on a part or all of the upper surface of the air electrode. A part of the fluorine solvent disposed on the upper surface of the air electrode penetrates into the porous air electrode. And in the air battery of this invention, the fluorine solvent arrange | positioned on the upper surface of an air electrode is accommodated in a housing | casing. In addition, “the electrolyte layer is configured to prevent entry of the fluorine solvent” means, for example, that the electrolyte layer is (1) a separator holding a hydrophilic electrolyte having a higher density than the fluorine solvent. (2) constituted by a gel-like polymer holding an electrolytic solution, (3) constituted by a dense solid polymer electrolyte, or (4) constituted by a dense solid electrolyte. Say. By configuring the electrolyte layer in this way, it is possible to suppress the situation in which the fluorine solvent moves between the air electrode and the negative electrode, and it is possible to suppress the performance deterioration of the air battery.

  Moreover, in the said invention, it is preferable that the electrolyte layer is comprised with the gel-like polymer holding the electrolyte solution.

  In the air battery of the present invention, a fluorine solvent is disposed on the upper surface of the air electrode. Since the fluorine solvent is a hydrophobic solvent, it is possible to prevent water from entering the negative electrode side of the air electrode. Further, since the fluorine solvent is a solvent that can dissolve a large amount of oxygen, even if a fluorine solvent is provided on the upper surface of the air electrode, oxygen can be supplied to the air electrode. Furthermore, in the air battery of the present invention, the electrolyte layer is configured to prevent the penetration of the fluorine solvent. Since the fluorine solvent does not have conductivity of metal ions that move between the air electrode and the negative electrode in a metal-air battery, if the fluorine solvent penetrates between the air electrode and the negative electrode, the performance may deteriorate. is there. However, since the electrolyte layer of the present invention is configured such that the electrolyte layer prevents entry of the fluorine solvent, such a situation can be prevented. In addition, by adopting such a configuration, it is possible to provide an air battery provided with an electrolyte layer having a higher ionic conductivity than the conventional technique using a hydrophobic nonaqueous electrolyte. As described above, according to the present invention, it is possible to provide an air battery capable of preventing the ingress of water and suppressing the decrease in performance.

  Further, in the present invention, the electrolyte layer is made of a gel-like polymer holding an electrolytic solution, thereby easily providing an air battery capable of preventing water from entering and suppressing performance degradation. can do.

1 is a cross-sectional view showing an example of a form of an air battery 10.

  In an air battery (metal-air battery) including a negative electrode using metal, when water and metal that have entered the battery react with each other, the negative electrode is deteriorated, and the performance of the air battery may be reduced. Therefore, in order to avoid such a situation, it is necessary to prevent water from entering the battery. As a result of earnest research, the present inventor has achieved both oxygen supply to the air electrode and prevention of reaction between the negative electrode and water by disposing a fluorine solvent on the upper surface of the air electrode disposed above the negative electrode. I found out that it would be possible. On the other hand, the fluorine solvent has a higher density than the electrolytic solution generally used in metal-air batteries. Therefore, simply filling a commonly used electrolyte between the air electrode and the negative electrode may cause the fluorine solvent to move between the air electrode and the negative electrode, thereby reducing the performance of the air battery. . As a result of earnest research, the present inventor has filled (1) a hydrophilic electrolyte solution having a higher density than the fluorine solvent between the air electrode and the negative electrode, and (2) a gel-like polymer holding the electrolyte solution. (3) A dense solid polymer electrolyte is disposed, or (4) A dense solid electrolyte is disposed, thereby avoiding a situation in which the fluorine solvent moves between the air electrode and the negative electrode. As a result, it has been found that the performance degradation of the air battery can be suppressed. Furthermore, as a result of earnest research, the present inventor has found that an interface (three-phase interface) where oxygen, metal ions and electrons meet by mixing an electrolyte material having metal ion conductivity when producing a porous air electrode. ) Can be formed on the air electrode.

  The present invention has been made based on such knowledge. In the present invention, a fluorine solvent is disposed on the upper surface of the air electrode, and an electrolyte layer configured to prevent the penetration of the fluorine solvent is provided, thereby suppressing the ingress of water and reducing the performance. The main gist is to provide an air battery that can be suppressed.

  The present invention will be described below with reference to the drawings. In addition, the form shown below is an illustration of this invention and this invention is not limited to the form shown below.

  FIG. 1 is a cross-sectional view schematically showing an embodiment of an air battery 10 of the present invention. As shown in FIG. 1, the air battery 10 includes an air electrode 1, a negative electrode 2 disposed below the air electrode 1, and an electrolyte layer 3 disposed between the air electrode 1 and the negative electrode 2. A power generation unit 4, a fluorine solvent 5 disposed on the upper surface of the air electrode 1, and a housing 6 that houses the power generation unit 4 and the fluorine solvent 5 are provided. In the air battery 10, the air electrode 1 has a porous structure, and the air electrode 1 contains a material having lithium ion conductivity (hereinafter sometimes referred to as “electrolyte material”) and a conductive material. Yes. The negative electrode 2 contains metallic lithium. The space 7 between the upper surface of the housing 6 and the fluorine solvent 5 is filled with oxygen-containing gas.

  If the water that has entered the inside of the housing 6 reacts with lithium contained in the negative electrode 2 in an emergency or emergency, the negative electrode 2 may be deteriorated. On the other hand, in the air battery 10, the hydrophobic fluorine solvent 5 is disposed on the upper surface of the air electrode 1. Therefore, according to the air battery 10, it is possible to avoid a situation where water enters the negative electrode 2 side of the air electrode 1 by the fluorine solvent 5. Further, the air battery 10 is configured such that the electrolyte layer 3 prevents the penetration of the fluorine solvent. Therefore, according to the air battery 10, it is possible to avoid a situation in which the fluorine solvent disposed on the upper surface of the air electrode 1 enters between the air electrode 1 and the negative electrode 2. For example, when the fluorine solvent that has entered between the air electrode 1 and the negative electrode 2 covers the upper surface of the negative electrode 2, the performance of the air battery 10 is degraded because the fluorine solvent does not have lithium ion conductivity. In the battery 10, since the infiltration of the fluorine solvent is prevented by the electrolyte layer 3, such a situation can be avoided. Further, in the air battery 10, the porous air electrode 1 contains an electrolyte material and a conductive material. Therefore, oxygen dissolved in the fluorine solvent that has entered the inside of the air electrode 1 and lithium ions and electrons that have moved through the air electrode 1 can react at the air electrode 1. Therefore, according to the air battery 10, the infiltration of water can be prevented by the fluorine solvent 5, and the performance deterioration of the air battery 10 can be suppressed by the air electrode 1 and the electrolyte layer 3. Hereinafter, the air battery 10 will be described for each configuration.

<Air electrode 1>
The air electrode 1 is a porous structure containing a conductive material, a catalyst, an electrolyte material, and a binder for binding them. Since it is porous, the fluorine solvent 5 disposed on the upper surface of the air electrode 1 penetrates into the air electrode 1. Then, when the conductive material and the electrolyte material constituting the air electrode 1 are in contact with the fluorine solvent 5, an electrochemical reaction can be generated in the air electrode 1. The air electrode 1 is provided with an air electrode current collector (not shown) that collects the air electrode 1 in contact with the inside or the outer surface of the air electrode 1.

  The conductive material contained in the air electrode 1 is not particularly limited as long as it can withstand the environment when the air battery 10 is used and has conductivity. Examples of the conductive material contained in the air electrode 1 include carbon materials such as carbon black and mesoporous carbon. Moreover, it is preferable that content of the electroconductive material in the air electrode 1 shall be 10 mass% or more from a viewpoint of suppressing the fall of a reaction field and the fall of battery capacity. Further, from the viewpoint of making the form capable of exhibiting a sufficient catalytic function, the content of the conductive material in the air electrode 1 is preferably 99% by mass or less.

  Examples of the catalyst contained in the air electrode 1 include cobalt phthalocyanine and manganese dioxide. From the viewpoint of providing a form capable of exhibiting a sufficient catalytic function, the content of the catalyst in the air electrode 1 is preferably 1% by mass or more. Further, from the viewpoint of suppressing a decrease in reaction field and a decrease in battery capacity, the content of the catalyst in the air electrode 1 is preferably 90% by mass or less.

  The electrolyte material contained in the air electrode 1 is not particularly limited as long as it has conductivity of lithium ions that move between the air electrode 1 and the negative electrode 2. Examples of the form of the electrolyte material contained in the air electrode 1 include a gel polymer holding an electrolytic solution, a solid polymer electrolyte, or a solid electrolyte.

When the gel-like polymer holding the electrolytic solution is contained in the air electrode 1, as the electrolytic solution held by the gel-like polymer, propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), Examples thereof include dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), and γ-butyrolactone (GBL). In the case where an ionic liquid is used as the electrolytic solution retained in the gel polymer, the ionic liquid includes N, N, N-trimethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide (abbreviated name). TMPA TFSI), N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide (abbreviation name; PP13 TFSI), N-methyl-N-propylpyrrolidinium bis (trifluoromethanesulfonyl) imide (abbreviation name) P13 TFSI), N-methyl-N-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide (abbreviated name; P14 TFSI), and the like. As the salt dissolved in these _{electrolyte, LiBF 4, LiPF 6, LiClO} 4, LiBOB, LiN (SO 2 CF 3) 2 ( short form _{name; LiTFSI), LiN (SO 2} C 2 F 5) 2 (Abbreviation name; LiBETI) etc. can be illustrated.

  Moreover, when the gel-like polymer which hold | maintained electrolyte solution is contained in the air electrode 1, as a gel-like polymer which hold | maintains electrolyte solution, ethers, such as an acrylate-type high molecular compound, a polyethylene oxide, and a crosslinked body containing this, Examples thereof include fluorine-based polymer compounds such as a polymer polymer compound, a methacrylate polymer compound such as polymethacrylate, polyvinylidene fluoride, and a copolymer of polyvinylidene fluoride and hexafluoropropylene.

  When the solid electrolyte is contained in the air electrode 1, specific examples of the solid polymer electrolyte include polyethylene oxide and a copolymer of polyethylene oxide and ethyl glycidyl ether.

Further, if the solid electrolyte to the air electrode 1 is contained, as a specific example of the solid electrolyte, LiPGeS, LiGeGaS, LiPSiS, LiSiAlS , other sulfide-based solid electrolytes such as _{LiPS, Li 1.5 Ti 2 Si 0} . ₄ P _2.6 O ₁₂ , Li _1.5 Al _0.5 Ge _1.5 (PO ₄ ) ₃ , Li ₇ La ₃ Zr ₂ O ₁₂ , Li ₆ BaLa ₂ Ta ₂ O ₁₂ , Li _0.5 La _{0 .5} TiO ₃ , Li _3.6 P _0.4 Si _0.5 O ₄ , Li _3.4 V _0.6 Ge _0.4 O ₄ , Li ₂ O—B ₂ O ₃ , LiCl—Li ₂ O— _{B 2 O 3, Li 2 O} -SiO 2, Li 2 SO 4 -LiPO 4, Li 2 O-Nb 2 O 5, Li 2 O-Ta 2 O 5 and the like.

  Examples of the binder contained in the air electrode 1 include polyvinylidene fluoride (PVDF) and polytetrafluoroethylene (PTFE). Although content of the binder in the air electrode 1 is not specifically limited, For example, it is preferable to set it as 10 mass% or less, and it is more preferable to set it as 1 mass% or more and 5 mass% or less.

  The air electrode 1 is provided with an air electrode current collector that collects the air electrode 1. The form of the air electrode current collector is not particularly limited as long as it is made of a conductive material and has a shape that allows the air battery 10 to operate to take out electric energy. Examples of a material that can constitute the air electrode current collector include stainless steel, nickel, aluminum, iron, titanium, and carbon. Examples of the shape of the air electrode current collector include a mesh (grid) shape. When a mesh-shaped air electrode current collector is provided, the air electrode current collector can be disposed inside the air electrode 1.

  The air electrode 1 is manufactured by a method such as applying a paint mixed with a conductive material, a catalyst, an electrolyte material, and a binder to the surface of the air electrode current collector by a doctor blade method, for example. Can do. In addition, it can also be produced by a method such as thermocompression bonding of a mixed powder containing a conductive material, a catalyst, and an electrolyte material.

<Negative electrode 2>
The negative electrode 2 contains metallic lithium that functions as a negative electrode active material. Further, the negative electrode 2 is provided with a negative electrode current collector (not shown) that contacts the inside or the outer surface of the negative electrode 2 and collects the current of the negative electrode 2.

  The negative electrode 2 only needs to contain at least a negative electrode active material, and may further contain a conductive material that improves conductivity, or a binder that fixes metallic lithium or the like. From the viewpoint of suppressing a decrease in reaction field and a decrease in battery capacity, the content of the conductive material in the negative electrode 2 is preferably 10% by mass or less. Further, the content of the binder in the negative electrode 2 is not particularly limited, but is preferably 10% by mass or less, and more preferably 1% by mass or more and 5% by mass or less. The kind of conductive material and binder that can be contained in the negative electrode 2, the amount used, and the like can be the same as in the air electrode 1.

  In the air battery 10, a negative electrode current collector is provided in contact with the inside or the outer surface of the negative electrode 2. The negative electrode current collector collects current from the negative electrode 2. In the air battery 10, the material for the negative electrode current collector is not particularly limited as long as it is a conductive material. As the material of the negative electrode current collector, copper, stainless steel, nickel, or the like can be used. Further, the negative electrode current collector can have a foil shape, a plate shape, a mesh (grid) shape, or the like. In the air battery 10, the negative electrode 2 can be produced by the same method as that for the air electrode 1, for example.

<Electrolyte layer 3>
The electrolyte layer 3 contains an electrolyte (liquid or solid) that is responsible for the conduction of lithium ions between the air electrode 1 and the negative electrode 2. The form of the electrolyte layer 3 is (1) a form in which a separator holding a hydrophilic electrolyte solution having a higher density than the fluorine solvent is contained, (2) a form in which a gel-like polymer holding the electrolyte solution is contained, (3) The solid polymer electrolyte having a dense structure can be accommodated, or (4) the solid electrolyte having a dense structure can be accommodated. According to the above form (1), the electrolyte solution filled in the electrolyte layer 3 has a higher density than the fluorine solvent 5 and the electrolyte solution filled in the electrolyte layer 3 is hydrophilic. It is possible to prevent the fluorine solvent 5 from moving downward from the air electrode 1. Further, according to the above-described form (2), the electrolyte solution held in the gel polymer is bonded to the gel polymer matrix, so that it is fluorine that tends to move downward from the air electrode 1. Solvent 5 can be blocked. Moreover, according to the said form (3) and (4), since the electrolyte layer 3 is comprised densely, the fluorine solvent 5 which is going to move below the air electrode 1 can be blocked | prevented.

In the case of the electrolyte layer 3 having a configuration in which a separator holding an electrolyte solution having a higher density than the fluorine solvent is accommodated, the electrolyte solution held in the separator may be an ionic liquid such as TMPA TFSI, PP13 TFSI, or P13 TFSI. Can be illustrated. Furthermore, examples of the fluorine solvent disposed on the upper surface of the air electrode 1 include methyl perfluoropropinate, ethyl perfluoropropinate, ethyl perfluorobutyrate, and methyl pearl fluorooctanoate. And, as an example of a combination of the electrolytic solution held in the separator and the fluorine solvent disposed on the upper surface of the air electrode 1, (electrolytic solution, fluorine solvent) = (PP13 TFSI, ethyl perfluoropropinate), ( P13 TFSI, ethyl perfluorobutyrate), (TMPA TFSI, methyl perfluorooctanoate) and the like. Examples of the salt dissolved in the electrolyte include LiBF ₄ , LiPF ₆ , LiClO ₄ , LiBOB, LiTFSI, LiBETI, and the like. Moreover, 1 mol / L etc. can be illustrated as salt concentration of electrolyte solution. Examples of the separator for holding the electrolytic solution include non-woven fabrics such as resin nonwoven fabrics and glass fiber nonwoven fabrics in addition to porous films such as polyethylene and polypropylene.

In the case of the electrolyte layer 3 in a form in which a gel-like polymer holding an electrolytic solution is accommodated, the electrolyte solution having a lower density than the fluorine solvent held in the gel-like polymer includes PC, EC, DEC, Examples include DMC, EMC, GBL, and the like. Examples of the electrolyte solution having a higher density than the fluorine solvent held in the gel polymer include ionic liquids such as TMPA TFSI, PP13 TFSI, P13 TFSI, and P14 TFSI. As the salt dissolved in these electrolytes _can be exemplified _{LiBF 4, LiPF 6, LiClO 4} , LiBOB, LiTFSI, the LiBETI like. In the air battery 10, when a gel-like polymer holding an electrolytic solution is accommodated in the electrolyte layer 3, the magnitude relationship between the density of the electrolytic solution held by the gel-like polymer and the density of the fluorine solvent 5 is large. Is not particularly limited, and it is also possible to adopt a form in which an electrolytic solution having a density equal to that of the fluorine solvent 5 is held by a gel-like polymer.

  Further, in the case of the electrolyte layer 3 having a form in which a gel polymer holding an electrolytic solution is accommodated, examples of the gel polymer holding the electrolytic solution include an acrylate polymer compound, polyethylene oxide, and a crosslinked body containing the same. Examples thereof include ether polymer compounds such as methacrylate polymer compounds such as polymethacrylate, fluorine polymer compounds such as polyvinylidene fluoride and a copolymer of polyvinylidene fluoride and hexafluoropropylene, and the like. .

  In the case of the electrolyte layer 3 in a form in which a solid polymer electrolyte having a dense structure is accommodated, specific examples of the solid polymer electrolyte accommodated in the electrolyte layer 3 include polyethylene oxide, polyethylene oxide and ethyl glycidyl ether. And a copolymer thereof. In addition, the degree of the density is not particularly limited as long as the structure of the solid polymer electrolyte constituting the electrolyte layer 3 is dense enough to prevent entry of the fluorine solvent.

Further, when the electrolyte layer 3 is in a form in which a solid electrolyte having a dense structure is accommodated, specific examples of the solid electrolyte accommodated in the electrolyte layer 3 include sulfide systems such as LiPGeS, LiGeGaS, LiPSiS, LiSiAlS, and LiPS. In addition to solid electrolyte, Li _1.5 Ti ₂ Si _0.4 P _2.6 O ₁₂ , Li _1.5 Al _0.5 Ge _1.5 (PO ₄ ) ₃ , Li ₇ La ₃ Zr ₂ O ₁₂ , Li ₆ BaLa ₂ Ta ₂ O ₁₂ , Li _0.5 La _0.5 TiO ₃ , Li _3.6 P _0.4 Si _0.5 O ₄ , Li _3.4 V _0.6 Ge _0.4 O ₄ , Li ₂ O—B ₂ O ₃ , LiCl—Li ₂ O—B ₂ O ₃ , Li ₂ O—SiO ₂ , Li ₂ SO ₄ —LiPO ₄ , Li ₂ O—Nb ₂ O ₅ , Li ₂ O—Ta ₂ O List _5th mag You can. In addition, the degree of density is not particularly limited as long as the structure of the solid electrolyte constituting the electrolyte layer 3 is dense enough to prevent entry of the fluorine solvent. The electrolyte layer 3 having a dense structure constituted by such a solid electrolyte can be produced by appropriately controlling the sintering conditions.

<Fluorine solvent 5>
As the fluorine solvent 5, a known fluorine solvent having a property (hydrophobicity) capable of dissolving oxygen supplied to the air electrode 1 and preventing entry of water can be appropriately used. Specific examples of the fluorine solvent 5 include C ₆ F ₁₄ , C ₇ F ₁₆ , C ₈ F ₁₈ , C ₉ F ₂₀ , hexafluorobenzene (HFB), hydrofluoroether (HFE) and the like. In the air battery 10, when HFE is used as the fluorine solvent 5, for example, 3M's Novec HFE-7100 (“Novec” is a registered trademark of 3M, the same applies hereinafter), Novec HFE-7200, and Novec HFE−. 7300, Novec HFE-7600, etc. can be used.

<Case 6>
The housing 6 accommodates at least the power generation unit 4, the fluorine solvent 5, and the oxygen-containing gas. In the air battery 10, the shape of the housing 6 is not particularly limited. As a constituent material of the housing 6, a material that can be used for the housing of the metal-air battery can be appropriately used. Further, as the oxygen-containing gas accommodated in the housing 6 (existing in the space 7), for example, oxygen gas having a pressure of 1.01 × 10 ⁵ Pa and an oxygen concentration of 99.99% can be used.

  In the above description regarding the air battery 10, the power generation unit 4 and the atmosphere are separated from each other by the upper surface of the housing 6, and the power generation unit 4 is not open to the atmosphere. However, the air battery of the present invention is limited to this form. Is not to be done. The casing of the air battery of the present invention can be configured such that a top lid is not provided or a plurality of holes for taking air into the top lid. However, when an electrolytic solution is used for the fluorine solvent 5 or the electrolyte layer 3, the power generation unit 4 is open to the atmosphere from the viewpoint of being able to suppress the depletion of the fluorine solvent 5 and the electrolytic solution. It is preferable to have no form.

  In the above description regarding the air battery 10, the air battery of the present invention in which Li is contained in the negative electrode 2 has been described, but the technical idea of the present invention is Na, K, Mg, Ca, Al, Fe, Zn. It can also be applied to an air battery equipped with a negative electrode containing an alloy containing these or an alloy. Examples of such applications of the air battery of the present invention include vehicle mounting applications, stationary power supply applications, household power supply applications, and portable information devices.

  In the air battery of the present invention, the number of power generation units accommodated in the housing may be one or two or more. When two or more power generation units are accommodated in the housing, the air electrode and the negative electrode provided in each of these power generation units may be electrically connected in series or electrically connected in parallel. good.

  The air battery of the present invention can be used as a power source for electric vehicles and portable information devices.

DESCRIPTION OF SYMBOLS 1 ... Air electrode 2 ... Negative electrode 3 ... Electrolyte layer 4 ... Electric power generation part 5 ... Fluorine solvent 6 ... Case 7 ... Space 10 ... Air battery

Claims (2)

A power generation unit including a porous air electrode, a negative electrode containing a metal, and an electrolyte layer having an electrolyte that conducts ions between the air electrode and the negative electrode, and a housing that houses the power generation unit Comprising
The negative electrode is disposed below the air electrode, and the electrolyte layer is disposed between the air electrode and the negative electrode,
A fluorine solvent is disposed on the upper surface of the air electrode;
The air battery, wherein the electrolyte layer is configured to prevent intrusion of the fluorine solvent. The air battery according to claim 1, wherein the electrolyte layer is made of a gel-like polymer holding an electrolytic solution.

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