JP2016066582A - Metal-air battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long life metal-air battery which efficiently uses a negative electrode material.SOLUTION: A metal-air battery includes: a negative electrode 1 including at least a metal which may be ionized to be eluted in an electrolytic solution 2; a positive electrode 3 which is disposed so as to contact with the electrolytic solution 2; and a holding member including a conductive part which contacts with the negative electrode 1 to hold the negative electrode 1 at a position where the negative electrode 1 is not exposed from an interface between the electrolytic solution 2 and a gas phase.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a metal-air battery capable of supplying power to the outside.

  Patent Document 1 is known as a metal-air battery.

  Patent Document 1 discloses a metal-air battery in which a metal constituting a negative electrode is used as a negative electrode active material, and oxygen in air that is in contact with the positive electrode is used as a positive electrode active material. A configuration is described in which the thickness or width decreases as the distance from the interface increases. The problem to be solved in Patent Document 1 is as follows. That is, for example, as shown in FIG. 1 of Patent Document 1, when the negative electrode is exposed from the interface between the electrolyte and the gas phase, the negative electrode is consumed and damaged in the vicinity of the interface between the electrolyte and the gas phase. In other words, the negative electrode below the portion may fall into the electrolyte solution and not function as the negative electrode. Such a problem occurs more remarkably in a negative electrode material having higher reactivity, such as magnesium. Patent Document 1 proposes a method of preventing the negative electrode from falling into the electrolytic solution by increasing the width or thickness of the negative electrode exposed from the interface between the electrolytic solution and the gas phase.

JP 2010-238644 A

  However, Patent Document 1 has a problem in that the energy of the negative electrode exposed from the interface between the electrolytic solution and the gas phase cannot be extracted, and the negative electrode material cannot be used efficiently.

  Therefore, the present invention has been made in view of the above problems, and suppresses consumption and breakage in the vicinity of the interface between the electrolyte solution and the gas phase of the negative electrode, and the long-life metal air that can efficiently use the negative electrode material. An object is to provide a battery.

  In order to solve the above problems, the present invention provides a negative electrode containing at least a metal that can be ionized and eluted into an electrolytic solution, a positive electrode disposed so as to be in contact with the electrolytic solution, and an interface between the electrolytic solution and a gas phase. And a holding member including a conductive portion that can be held in contact with the negative electrode at a position where the negative electrode is not exposed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement | achieve the long life metal air battery which can utilize negative electrode material efficiently.

It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 1 is seen from the side. It is a principal part perspective view which shows only the negative electrode 1 and the electroconductive holding member 4 of the metal-air battery shown in FIG. 1, (a) is a sandwiching part of the upper central part of the negative electrode 1 with a single member. (B) is a diagram showing a configuration in which the upper portion of the negative electrode 1 is partially sandwiched and joined by a plurality of members, and (c) is a diagram showing a single upper portion of the negative electrode 1 as a whole. It is a figure which shows the structure which carries out pinching joining by the member. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 2 is seen from the side. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 3 is seen from the side. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 4 is seen from the side. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 5 is seen from the side. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 6 is seen from the side. It is a principal part perspective view which shows only the negative electrode 1 and the electroconductive holding member 4 of the metal air battery shown in FIG. 7, (a) is the state which has not inserted the negative electrode 1 in the opening part 41 of the electroconductive holding member 4. FIG. FIG. 4B is a diagram illustrating a state in which the negative electrode 1 is fitted in the opening 41 of the conductive holding member 4. FIG. 9 is a perspective view of a main part showing only a negative electrode 1 and a conductive holding member 4 of a metal-air battery according to a sixth embodiment, and shows a configuration different from the configuration shown in FIG. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 7 is seen from the side. It is principal part sectional drawing which shows typically schematic structure when the metal air battery of Embodiment 8 is seen from the side. FIG. 10 is an exploded perspective view of a main part schematically showing a schematic configuration of one form of a reaction product recovery membrane 7 and a reaction product recovery membrane frame 8 in a metal-air battery of an eighth embodiment. FIG. 10 is an exploded perspective view of a main part schematically showing a schematic configuration of one form of a reaction product recovery membrane 7 and a reaction product recovery membrane frame 8 in a metal-air battery of an eighth embodiment. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 9 is seen from the side in a model body. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 10 is seen from the side in a model body. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 11 is seen from the side in a model body. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 12 is seen from the side. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 13 is seen from the side. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 14 is seen from the side. It is principal part sectional drawing which shows a schematic structure when the metal air battery of Embodiment 14 is seen from the side. FIG. 22 is a perspective view schematically showing a main part of a schematic configuration of an embodiment of a reaction product recovery film 7 and a reaction product recovery film frame 8 in the metal-air battery according to the fifteenth embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. In these drawings, the same reference numerals represent the same or corresponding parts.

<Embodiment 1>
FIG. 1 is a cross-sectional view of a main part showing a schematic configuration when the metal-air battery of Embodiment 1 is viewed from the side.

  The metal-air battery of the present embodiment is configured such that a negative electrode 1, an electrolytic solution 2, a positive electrode 3, and a conductive holding member 4 that holds the negative electrode 1 are housed in a container 5. In FIG. 1, the lower end of the negative electrode 1 may be in contact with the container 5. In FIG. 1, the positive electrode 3 is shown in contact with the gas phase in the container 5, but the positive electrode 3 may be entirely immersed in the electrolytic solution 2. Further, the container 5 does not need to be sealed inside, and one or a plurality of openings may be provided in the container 5.

  Here, the negative electrode 1 should just contain the metal which can be ionized and melt | dissolved with respect to the electrolyte solution 2. FIG. More specifically, for example, when water is included in the electrolytic solution 2, the negative electrode 1 is composed of a single metal whose standard electrode potential is lower than that of hydrogen or an anode active material made of an alloy including an element whose standard electrode potential is lower than that of hydrogen. including. Moreover, in order to obtain battery characteristics and desired characteristics, the negative electrode 1 may be added with a metal or a nonmetallic element. The added metal or nonmetallic element may be alloyed to function as a negative electrode active material, or may not be alloyed. In some cases, the negative electrode may be formed of a porous material or a powdery material, and the shape and surface state of the negative electrode are not limited.

  Examples of simple metals whose standard electrode potential is lower than that of hydrogen include lithium (Li), calcium (Ca), yttrium (Y), cerium (Ce), neodymium (Nd), beryllium (Be), zirconium (Zr), and indium. (In), cobalt (Co), nickel (Ni), tin (Sn), lead (Pb), zinc (Zn), iron (Fe), aluminum (Al), magnesium (Mg), manganese (Mn), silicon (Si), titanium (Ti), chromium (Cr), vanadium (V), and the like. An alloy can also be applied. Such negative electrode active materials may be used alone or in combination of two or more.

  In general, an alloy is a generic term for a metal element having one or more metal elements or non-metal elements added and having metallic properties. Specifically, a material obtained by adding one or more metal elements or non-metal elements to the above metal element can be given. In the alloy structure, the component elements are in a mixed state with separate crystals by causing eutectic, eutectoid, peritectic, and peritectic reaction, etc .; the component elements are completely mixed to form a solid solution. There are those in which the constituent elements form an intermetallic compound or a compound of a metal and a nonmetal. In this embodiment, any alloy structure may be used. However, it is not limited to these, The conventionally well-known material applied to a metal air battery can be used.

  In the present invention, it is effective to use a single metal having a higher standard electrode potential than hydrogen, in particular, a highly reactive metal, for example, a single magnesium or a magnesium alloy. The magnesium alloy is an alloy containing magnesium (Mg) as a main component, for example, an alloy containing 50 atomic% or more of magnesium. Examples of magnesium alloys include Mg—Al, Mg—Mn, Mg—Zn, Mg—Al—Mn, Mg—Al—Mn—Ca, Mg—Al—Zn—Ca, and Mg—Al. -Zn-based, Mg-Zn-Zr-based, and the like. Furthermore, elements such as Al, Ca, Zn, Mn, Si, Cu, Li, Na, K, Fe, Ni, Ti, Zr, Ce, Ga, and Hg may be added to the magnesium alloy.

  Moreover, this invention can be used also for a zinc simple substance or a zinc alloy. The zinc alloy is an alloy containing zinc (Zn) as a main component, for example, an alloy containing 50 atomic% or more of Zn. Examples of the zinc alloy include Zn—Al, Zn—Be, Zn—C, Zn—Ca, Zn—Ce, Zn—Cr, Zn—Fe, Zn—Ga, Zn—Ge, Zn—H, Zn—In, Zn—K, Zn—Li, Zn—Mg, Zn—Mn, Zn—N, Zn—Na, Zn—Ni, Zn—O, There are a Zn-S system, a Zn-Ti system, a Zn-Zr system, and the like. Alternatively, a ternary or higher zinc alloy obtained by combining the above binary zinc alloys may be used.

  As the electrolytic solution 2, for example, an aqueous solution or a non-aqueous solution of potassium chloride, sodium chloride, potassium hydroxide, sodium hydrogen carbonate, sodium percarbonate, or the like can be applied. Such an aqueous solution or non-aqueous solution may be used alone or in combination of two or more. Alternatively, treatment such as pH adjustment may be performed. However, the present invention is not limited to these, and conventionally known electrolytic solutions applicable to metal-air batteries, such as an aqueous solution of fluoride, an aqueous solution containing halogen, and an aqueous solution of polyvalent carboxylic acid, can be applied.

  The positive electrode 3 has a role of supplying electrons to oxygen in the air in contact with air, and is not particularly limited as long as it is a conductive material. Activated carbon, carbon fiber, carbon Carbonaceous materials such as felt and metal materials such as iron and copper can be used. As the material of the positive electrode 3, it is particularly preferable to use carbon powder from the viewpoint of a large contact area with oxygen in the air and excellent current collection efficiency. In addition, a substance having a catalytic action for promoting a reduction reaction of oxygen may be present on the material of the positive electrode 3. In addition, the structure of the positive electrode 3 is not limited to these, You may use the conventionally well-known positive electrode applied to an air cell or a hydrogen fuel cell.

  The conductive holding member 4 includes a conductive portion made of a conductive material that can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface of the electrolytic solution 2. Since the conductive holding member 4 includes a conductive portion that contacts the negative electrode 1, the negative electrode 1 and the conductive holding member 4 are electrically connected.

  Therefore, for example, if the positive electrode 3 and the conductive holding member 4 are wired and connected to an external circuit, power can be supplied to the external circuit.

  The conductive holding member 4 may be composed of only a conductive portion made of a conductive material, or a conductive portion made of a conductive material and an insulating portion made of an insulating material. Also good. When the conductive holding member 4 is composed of a conductive portion and an insulating portion, the negative electrode 1 need not be held only by the conductive portion, and the negative electrode 1 can be held as a structure in which the conductive portion and the insulating portion are combined. It may be.

  As a conductive material applicable to the conductive portion of the conductive holding member 4, a general conductive material can be used, such as copper and copper alloy, aluminum and aluminum alloy, iron and iron alloy, silver and silver alloy. Gold and gold alloys, nickel and nickel alloys, titanium and titanium alloys are particularly preferred. Moreover, such a conductive material may be used alone or in combination of two or more.

  As a material applicable to the insulating portion of the conductive holding member 4, a general insulating material can be used, and in particular, a plastic material, a ceramic material, a glass material, a synthetic resin material, a wood, a rubber material, and a polymer material. Etc. can be used.

  In the present embodiment, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper part, joining the upper part, or sandwiching and joining the upper part. More specifically, as the conductive holding member 4, for example, as shown in FIG. 2, which is a main part perspective view showing only the negative electrode 1 and the conductive holding member 4 of the metal-air battery shown in FIG. A structure in which the central part above 1 is partially sandwiched and joined by a single member (FIG. 2A), and a structure in which the upper part of negative electrode 1 is partially sandwiched, joined or sandwiched by a plurality of members (FIG. 2B), a configuration in which the upper portion of the negative electrode 1 is entirely sandwiched and joined by a single member (FIG. 2C), and the like can be applied.

  In addition, as a clamping method, it is fastened with a clip, fastened with a vise or a similar structure, fastened with a string-like thing, fastened with a fitting such as a groove or unevenness, fastened with magnetic force, elastic deformation is the original Examples thereof include a method of fastening using a force to return to the shape of the material and a method of fastening using the shape memory effect of the shape memory alloy.

  In addition, as a joining method, general welding methods such as gas welding, arc welding, electroslag welding, electron beam welding, and laser beam welding, and general welding methods such as resistance welding, forging welding, friction welding, and explosion welding are used. Examples thereof include a pressure welding method, brazing, soldering, diffusion bonding, ultrasonic bonding, vapor deposition, atomic bonding, and rolling bonding.

  In the present embodiment, the metal contained in the negative electrode 1 that can be ionized and eluted into the electrolyte 2 functions as a substance that emits electrons, and oxygen in the air functions as a substance that receives electrons from the positive electrode. As a result, an electromotive force is generated.

When the metal contained in the negative electrode 1 is, for example, magnesium, the magnesium in the negative electrode 1 emits electrons and becomes magnesium ions and is eluted into the electrolyte solution 2. In the positive electrode 3, oxygen and water receive the electrons and receive water. It becomes oxide ion. When viewed as a whole metal-air battery, an electromotive force is generated between the _two electrodes by producing magnesium hydroxide (Mg (OH) ₂ ) from magnesium, oxygen, and water. Each reaction formula in the positive electrode 3 and the negative electrode 1 is as follows.
Positive electrode: O ₂ + 2H ₂ O + 4e ⁻ → 4OH ⁻
Negative electrode: 2Mg → 2Mg2 ⁺⁺ 4e ⁻
Overall: 2Mg + O ₂ + 2H ₂ O → 2Mg (OH) ₂ ↓

Alternatively, when the metal contained in the negative electrode 1 is, for example, zinc, the zinc in the negative electrode 1 emits electrons and becomes zinc ions and elutes into the electrolytic solution 2. In the positive electrode 3, oxygen and water receive the electrons. It becomes hydroxide ion. When viewed from the whole metal air, an electromotive force is generated between the two electrodes by generating zinc hydroxide or zinc oxide from zinc, oxygen and water. The respective reaction formulas at the positive electrode and the negative electrode are as follows.
Positive electrode: O ₂ + 2H ₂ O + 4e ⁻ → 4OH ⁻
Negative electrode: 2Zn → 2Zn ₂ ++ 4e ⁻
_{Overall: 2Zn + O 2 + 2H 2} O → 2Zn (OH) 2 → 2ZnO ↓ + 2H 2 O

  According to the metal-air battery of the present embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, since such an effect is more remarkable as the negative electrode material having higher reactivity, it is preferably applied to a configuration using a negative electrode containing at least magnesium.

<Embodiment 2>
In the second embodiment, the conductive holding member 4 is configured to hold the upper part of the negative electrode 1 by sandwiching the upper part, joining the upper part, or holding and joining the upper part. A configuration in which the holding member 4 holds the negative electrode 1 by bonding or fitting only the upper surface thereof will be described. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  FIG. 3 is a cross-sectional view of a principal part showing a schematic configuration when the metal-air battery of the second embodiment is viewed from the side.

  As shown in FIG. 3, the second embodiment is different from the first embodiment only in that the conductive holding member 4 holds the upper surface of the negative electrode 1 by bonding or fitting only the upper surface. However, the rest is the same as in the first embodiment.

  Even in the metal-air battery of the second embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

<Embodiment 3>
In Embodiment 3, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper portion, joining the upper portion, or sandwiching and joining the upper portion. The structure which hold | maintains by combining the electroconductive holding member 4 and the negative electrode 1 using FIG. Is demonstrated. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  FIG. 4 is a cross-sectional view of the main part showing a schematic configuration when the metal-air battery of Embodiment 3 is viewed from the side.

  The third embodiment is different from the first embodiment in that the conductive holding member 4 sandwiches the upper side of the negative electrode 1 and uses the coupling member 6 to bond the conductive holding member 4 and the negative electrode 1. However, the configuration is the same as that of the first embodiment except for the point.

  As shown in FIG. 4, for example, a pin can be used as the coupling member 6, and in this case, a through-hole is provided in the conductive holding member 4, and the negative electrode 1 has a through-hole in the conductive holding member 4. The electric holding member 4 and the negative electrode 1 can be combined and held by providing a concave portion at a corresponding position and arranging the through portion and the concave portion with a common pin.

  Even in the metal-air battery of the third embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

<Embodiment 4>
In the fourth embodiment, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper part, joining the upper part, or sandwiching and joining the upper part. A configuration in which the holding member 4 holds the lower surface of the negative electrode 1 will be described. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  FIG. 5 is a cross-sectional view of a main part showing a schematic configuration when the metal-air battery of the fourth embodiment is viewed from the side.

  As shown in FIG. 5, the fourth embodiment is different from the first embodiment only in that the conductive holding member 4 receives and holds the lower surface of the negative electrode 1. Other than the above, the second embodiment is the same as the first embodiment. In the fourth embodiment, since the conductive holding member 4 has a substantially J-shape and receives the lower surface of the negative electrode 1, at least the lower surface contacts and is electrically connected. Moreover, you may join or couple | bond the negative electrode 1 and the electroconductive holding member 4 like the said Embodiment 1-3.

  Even in the metal-air battery of the fourth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

<Embodiment 5>
In the fifth embodiment, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper part, joining the upper part, or sandwiching and joining the upper part. A configuration in which the holding member 4 is held as a net-like member so as to cover the negative electrode 1 will be described. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  FIG. 6 is a cross-sectional view of a principal part showing a schematic configuration when the metal-air battery of the fifth embodiment is viewed from the side.

  As shown in FIG. 6, the fifth embodiment is different from the first embodiment in that the conductive holding member 4 is a net-like member, and the negative electrode 1 is covered with the net-like conductive holding member. The configuration is only a point, and the rest is the same as in the first embodiment. In the fifth embodiment, the load of the negative electrode 1 is applied, and at least the lower surface of the negative electrode 1 comes into contact with and is electrically connected to the conductive holding member 4. Moreover, you may join or couple | bond the negative electrode 1 and the electroconductive holding member 4 like the said Embodiment 1-3.

  Even in the metal-air battery of the fifth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

<Embodiment 6>
As the sixth embodiment, in the first embodiment, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper part, joining the upper part, or sandwiching and joining the upper part. A configuration in which the holding member 4 is provided with the opening 41 and the negative electrode 1 is fitted in the opening 41 will be described. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  FIG. 7 is a cross-sectional view of an essential part showing a schematic configuration when the metal-air battery of Embodiment 6 is viewed from the side. FIG. 8 is a perspective view of the main part showing only the negative electrode 1 and the conductive holding member 4 of the metal-air battery shown in FIG. 7, and FIG. 8A shows the negative electrode 1 fitted into the opening 41 of the conductive holding member 4. FIG. 8B shows a state in which the negative electrode 1 is fitted in the opening 41 of the conductive holding member 4.

  In the sixth embodiment, the only difference from the first embodiment is that the conductive holding member 4 is provided with an opening 41 and the negative electrode 1 is fitted into the opening 41 and held therein. The rest is the same as in the first embodiment.

  More specifically, as shown in FIG. 8A, the conductive holding member 4 is provided with an opening 41. For example, from the direction indicated by the arrow in FIG. The negative electrode 1 is fitted into 41. Thereby, as shown in FIG.8 (b), it can be set as the structure hold | maintained so that the negative electrode 1 may be engage | inserted in the electroconductive holding member 4, and a metal air battery as shown in FIG. 7 can be comprised.

  In the sixth embodiment, a portion where the negative electrode 1 and the conductive holding member 4 are in contact with each other is formed by fitting the negative electrode 1 into the opening 41 of the conductive holding member 4 and is electrically connected there. It will be. Moreover, you may join or couple | bond the negative electrode 1 and the electroconductive holding member 4 like the said Embodiment 1-3.

  In the configuration shown in FIG. 8, the configuration in which one negative electrode 1 is held by one conductive holding member 4 is shown. For example, as shown in FIG. In addition, a plurality of negative electrodes 1 may be held in at least one of the lateral directions.

  Since the metal-air battery of the sixth embodiment is also configured to be able to contact and hold the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase using the conductive holding member 4. As a result, it is possible to easily supply electric power to the outside, to efficiently use the negative electrode material, and to achieve a long-life metal-air battery.

<Embodiment 7>
In the seventh embodiment, the conductive holding member 4 is configured to hold the negative electrode 1 by sandwiching the upper part, joining the upper part, or holding and joining the upper part. A configuration for holding the negative electrode 1 so as to adhere to the holding member 4 will be described. In addition, since it is the same as that of the said Embodiment 1 except the holding structure of the negative electrode 1 by the electroconductive holding member 4 demonstrated here, description is not repeated.

  As shown in FIG. 10, the seventh embodiment is different from the first embodiment only in that the negative electrode 1 is attached to the conductive holding member 4 so as to hold it. Is the same as in the first embodiment.

  In order to attach the negative electrode 1 to the conductive holding member 4, for example, the negative electrode 1 and the conductive holding member 4 are joined as in the first embodiment, or a film forming technique is used for the conductive holding member 4. A film made of a negative electrode material as the negative electrode 1 may be formed on the conductive holding member 4 by vapor deposition or the like.

  Even in the metal-air battery according to the seventh embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

<Eighth embodiment>
Japanese Patent Application Laid-Open No. 2004-362869 discloses a supply of a negative electrode that can be discharged again by replacing only the negative electrode while leaving all the components other than the negative electrode in the metal-air battery when the discharge is completed after using up the negative electrode. A method (hereinafter referred to as “mechanical charge”) has been proposed.

  In metal-air batteries, reaction products due to reactions such as battery reactions accumulate in the electrolyte, resulting in a decrease in output due to increased liquid resistance and battery reaction termination due to contamination of battery components, resulting in shorter battery life. May cause adverse effects such as Furthermore, when a metal-air battery is operated using mechanical charge, the reaction products described above accumulate and accumulate. Therefore, the greater the number of mechanical charges, the greater the adverse effects described above. .

  Embodiments 8 to 15 to be described below have been made in view of such problems, and are caused by reaction products by efficiently recovering reaction products due to reactions such as battery reactions. Another object of the present invention is to provide a metal-air battery that does not cause a decrease in output and does not have a shortened life caused by a reaction product. Here, the reaction such as the battery reaction refers to any reaction that can occur in the system constituting the metal-air battery including the battery reaction.

  As an eighth embodiment, in addition to the configuration of the first embodiment, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used, and the reaction product recovery film 7 forms at least a part of the negative electrode 1. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 1 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 11, in the eighth embodiment, the difference from the first embodiment is that the reaction product is arranged so as to surround at least a part of the negative electrode 1 in addition to the configuration of the first embodiment. The product recovery membrane 7 and the reaction product recovery membrane 7 are fixed, and a reaction product recovery membrane frame 8 having a structure that can be detached from the conductive holding member 4 is added. The other points are the same as in the first embodiment.

  The reaction product recovery film frame 8 has a reaction product recovery film frame fixing protrusion 81, and the reaction product recovery film frame fixing protrusion 81 is a reaction product recovery film frame fixing hole of the conductive holding member 4. 41, the reaction product recovery film frame fixing projection 81 and the reaction product recovery film frame fixing hole 41 are fitted to each other so that the reaction product recovery film frame 8 is electrically conductive. 4 is fixed.

  The shape of the reaction product recovery film frame fixing projection 81 is not particularly limited, but for example, a substantially rectangular parallelepiped shape can be selected. The number of reaction product recovery film frame fixing projections 81 is not particularly limited, and may be two as shown in FIG. 11, or may be one or more than two. Alternatively, the reaction product recovery film frame 8 may be provided on the entire surface in contact with the conductive holding member 4.

  The shape and quantity of the reaction product recovery film frame fixing hole 41 are not particularly limited as long as the shape and quantity allow the reaction product recovery film frame fixing protrusion 81 to enter. The reaction product recovery film frame fixing hole 41 may be provided on the lower surface of the conductive holding member 4 as shown in FIG. 11, but is not limited to this position. It may be provided on the side surface of the member 4.

  12 and 13 show examples of the shape of the reaction product recovery film frame 8. In FIG. 12, the reaction product recovery membrane frame 8 has a substantially annular shape, and in FIG. 13, the reaction product recovery membrane frame (left) 82 and the reaction product are used as the reaction product recovery membrane frame 8. A shape divided into a recovery film frame (right) 83 is used. The shape of the reaction product recovery membrane frame 8 is not limited to the shape example described here.

  The fixing of the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 will be described with reference to FIG. The reaction product recovery membrane 7 has a reaction product recovery membrane joint 71, and the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 are moved relative to each other in the direction of the arrow to thereby generate a reaction product. By fixing the recovery membrane joining portion 71 to the reaction product recovery membrane frame 8, the reaction product recovery membrane 7 is fixed to the reaction product recovery membrane frame 8. In the example shown in FIG. 13, the reaction product recovery membrane joint 71 can be fixed to the reaction product recovery membrane frames 82 and 83 in the same manner.

  The place where the reaction product recovery membrane joint 71 is fixed to the reaction product recovery membrane frame 8 may be the lower part of the reaction product recovery membrane frame 8 as shown in FIGS. For example, the side part of the reaction product recovery film frame 8 may be used. As a method for fixing the reaction product recovery film 7 to the reaction product recovery film frame 8, a conventionally known fixing method can be used. For example, hot air fusion, solvent fusion, heat fusion, and electric fusion And a general fixing method such as fastening with an adhesive or glue. When the reaction product recovery film 7 is removed from the conductive holding member 4 together with the reaction product recovery film frame 8, the reaction product recovery film 7 is turned over (reversed) around the reaction product recovery film frame 8. It is desirable to have a structure that can be used. The shape of the reaction product recovery film 7 is not particularly limited, and the reaction product recovery film 7 may or may not be in contact with the negative electrode 1.

  The material that can be used for the reaction product recovery film 7 may be a conventional public separator material or resin material applied to an air battery or a hydrogen fuel cell. For example, glass paper that has not been subjected to water repellent treatment. A microporous film made of polyolefin such as polyethylene or polypropylene can be preferably used. In addition, as a material that can be used for the reaction product recovery film frame 8, a conventionally known material that is applied to a metal-air battery can be applied. For example, a material made of resin, metal, or a composite material thereof can be used. Can be applied.

  Even in the metal-air battery of the eighth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 9>
In the ninth embodiment, the reaction product recovery film frame 8 to which the reaction product recovery film 7 is fixed is fixed to the conductive holding member 4 in the eighth embodiment. A configuration in which the reaction product recovery film frame 8 to which the product recovery film 7 is fixed is fixed to the container 5 will be described. In addition, since it is the same as that of the said Embodiment 8 except the fixing structure of the reaction product collection | recovery film | membrane frame 8 by the housing 5 demonstrated here, description is not repeated.

  As shown in FIG. 14, the ninth embodiment is different from the eighth embodiment in that the reaction product recovery film frame 8 to which the reaction product recovery film 7 is fixed is fixed to the container 5. In other respects, this embodiment is the same as the eighth embodiment.

  The container 5 has container protrusions 51, and these container protrusions 51 are inserted into the reaction product recovery film frame fixing holes (frames) 84 of the reaction product recovery film frame 8. And the frame-side reaction product recovery membrane frame fixing hole 84 are fitted together, and the reaction product recovery membrane frame 8 is fixed to the container 5. Although the shape of the container protrusion 51 is not particularly limited, for example, a substantially rectangular parallelepiped shape can be selected. The number of container protrusions 51 is not particularly limited, and may be two as shown in FIG. 14, or may be one or more than two. Alternatively, the reaction product recovery film frame 8 may be provided on the entire surface in contact with the container 5. The shape and quantity of the reaction product recovery membrane frame fixing hole (frame) 84 are not particularly limited as long as the shape and quantity allow the container protrusion 51 to enter.

  Even in the metal-air battery according to the ninth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolyte 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the ninth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, the reaction product recovery membrane 7 can be easily detached from the container 5 by removing the reaction product recovery membrane frame 8 from the container 5, and the reaction product recovery membrane 7 can be removed from the reaction product recovery membrane frame. 8 is a structure that can be turned upside down (inverted) around the axis, so that the reaction product is deposited with the reaction product recovery film 7 removed from the container 5. If the front and back are turned over so that the inside is the outside, the reaction product deposited in the reaction product recovery film 7 can be easily removed. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 10>
In the tenth embodiment, in addition to the configuration of the third embodiment, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used, and the reaction product recovery film 7 forms at least a part of the negative electrode 1. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 3 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 15, in the tenth embodiment, the difference from the third embodiment is that the reaction product arranged to surround at least a part of the negative electrode 1 in addition to the configuration of the third embodiment. The product recovery membrane 7 and the reaction product recovery membrane 7 are fixed, and a reaction product recovery membrane frame 8 having a structure that can be detached from the conductive holding member 4 is added. The other points are the same as in the third embodiment.

  The reaction product collection film frame 8 has a hole through which the reaction product collection film frame coupling member 85 passes, and is fixed to the conductive holding member 4 by the reaction product collection film frame coupling member 85. The shape of the reaction product recovery film frame coupling member 85 is not particularly limited, and may have, for example, a thread. Further, the number of the reaction product recovery membrane frame coupling members 85 is not particularly limited. The reaction product recovery film frame coupling member 85 is the same as the coupling member 6, and in addition to fixing the negative electrode 1 to the conductive holding member 4 as in the third embodiment, the reaction product recovery film 85 The frame connecting member 85 may also have a role of fixing to the conductive holding member 4.

  The method for fixing the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 is the same as that in the eighth embodiment, and is therefore omitted.

  The materials that can be used for the reaction product recovery film 7 and the reaction product recovery film frame 8 are the same as those in the eighth embodiment, and are therefore omitted.

  Even in the metal-air battery of the tenth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 11>
As an eleventh embodiment, in addition to the configuration of the seventh embodiment, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used, and the reaction product recovery film 7 forms at least a part of the negative electrode 1. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 7 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 16, in the eleventh embodiment, the difference from the seventh embodiment is that the reaction product arranged so as to surround at least a part of the negative electrode 1 in addition to the configuration of the seventh embodiment. The reaction product collection film 7 and the reaction product collection film 7 are fixed, and a reaction product collection film frame having a structure that can be attached to and detached from the conductive holding member 4 is added. The rest is the same as in the seventh embodiment.

  The method for fixing the reaction product recovery film frame 8 to the conductive holding member 4 is not particularly limited. For example, the fixing method exemplified in the above-described eighth, ninth, and tenth embodiments can be used.

  The method for fixing the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 is the same as that in the eighth embodiment, and is therefore omitted.

  The materials that can be used for the reaction product recovery film 7 and the reaction product recovery film frame 8 are the same as those in the eighth embodiment, and are therefore omitted.

  Even in the metal-air battery of the eleventh embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 12>
In the twelfth embodiment, in addition to the configuration of the fourth embodiment, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used, and the reaction product recovery film 7 forms at least a part of the negative electrode 1. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 4 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 17, in the present twelfth embodiment, the difference from the fourth embodiment is that the reaction product arranged to surround at least part of the negative electrode 1 in addition to the configuration of the fourth embodiment. The product recovery membrane 7 and the reaction product recovery membrane 7 are fixed, and a reaction product recovery membrane frame 8 having a structure that can be detached from the conductive holding member 4 is added. The other points are the same as in the fourth embodiment.

  The method for fixing the reaction product recovery film frame 8 to the conductive holding member 4 is not particularly limited. For example, the fixing method exemplified in the above-described eighth, ninth, and tenth embodiments can be used.

  The method for fixing the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 is the same as that in the eighth embodiment, and is therefore omitted.

  The materials that can be used for the reaction product recovery film 7 and the reaction product recovery film frame 8 are the same as those in the eighth embodiment, and are therefore omitted.

  Even in the metal-air battery of the twelfth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 13>
As Embodiment 13, in addition to the configuration of Embodiment 2 above, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 2 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 18, in the thirteenth embodiment, the difference from the second embodiment is that the reaction product arranged to surround at least a part of the negative electrode 1 in addition to the configuration of the second embodiment. The product recovery membrane 7 and the reaction product recovery membrane 7 are fixed, and a reaction product recovery membrane frame 8 having a structure that can be detached from the conductive holding member 4 is added. The other points are the same as in the second embodiment.

  The method for fixing the reaction product recovery film frame 8 to the conductive holding member 4 is not particularly limited. For example, the fixing method exemplified in the above-described eighth, ninth, and tenth embodiments can be used.

  The method for fixing the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 is the same as that in the eighth embodiment, and is therefore omitted.

  The materials that can be used for the reaction product recovery film 7 and the reaction product recovery film frame 8 are the same as those in the eighth embodiment, and are therefore omitted.

  Even in the metal-air battery of the thirteenth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 14>
As Embodiment 14, in addition to the configuration of Embodiment 6, the reaction product recovery film 7 fixed to the reaction product recovery film frame 8 is used, and the reaction product recovery film 7 forms at least a part of the negative electrode 1. The structure arrange | positioned so that it may surround is demonstrated. In addition, since it is the same as that of the said Embodiment 6 except the reaction product collection | recovery film | membrane 7 and the reaction product collection | recovery film | membrane frame 8 demonstrated here, description is not repeated.

  As shown in FIG. 19, the difference between Embodiment 14 and Embodiment 6 is that the reaction product arranged to surround at least a part of negative electrode 1 in addition to the configuration of Embodiment 6 above. The product recovery membrane 7 and the reaction product recovery membrane 7 are fixed, and a reaction product recovery membrane frame 8 having a structure that can be detached from the conductive holding member 4 is added. The other points are the same as in the sixth embodiment.

  The method for fixing the reaction product recovery film frame 8 to the conductive holding member 4 is not particularly limited. For example, the fixing method exemplified in the above-described eighth, ninth, and tenth embodiments can be used.

  The method for fixing the reaction product recovery membrane 7 to the reaction product recovery membrane frame 8 is the same as that in the eighth embodiment, and is therefore omitted.

  As shown in FIG. 19, the reaction product recovery film 7 may cover up to the lower part of the conductive holding member 4, but the shape is not limited, and for example, as shown in FIG. It is good also as the shape covered with a part.

  The materials that can be used for the reaction product recovery film 7 and the reaction product recovery film frame 8 are the same as those in the eighth embodiment, and are therefore omitted.

  Even in the metal-air battery of the fourteenth embodiment, the conductive holding member 4 can be held in contact with the negative electrode 1 at a position where the negative electrode 1 is not exposed from the interface between the electrolytic solution 2 and the gas phase. In addition, it is possible to supply electric power to the outside, and it is possible to realize a long-life metal-air battery by making it possible to efficiently use the negative electrode material.

  In addition, regarding the reaction product generated by the reaction such as the battery reaction, in the eighth embodiment, since the reaction product recovery film 7 is disposed so as to surround at least a part of the negative electrode 1, the reaction product is reacted. The product recovery film 7 is deposited mainly on the portion surrounding the negative electrode 1 and hardly diffuses / deposits outside the portion. As a result, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stoppage due to contamination of battery constituent members, and a long-life and high-output metal-air battery can be provided.

  Further, by removing the reaction product recovery film frame 8 from the conductive holding member 4, the reaction product recovery film 7 can be easily removed from the conductive holding member 4, and the reaction product recovery film 7 is reacted. Since the structure is such that the product recovery film frame 8 can be turned upside down (inverted) around the axis, the reaction product is deposited with the reaction product recovery film 7 removed from the conductive holding member 4. The reaction product deposited in the reaction product recovery film 7 can be easily removed by turning the front and back so that the inner side of the reaction product recovery film 7 is outside. This is because the reaction product recovery membrane 7 and the reaction product recovery membrane frame 8 can be used repeatedly when the metal-air battery is operated by mechanical charge, and the reaction product by the negative electrode before replacement by mechanical charge. It can be removed at every mechanical charge. Therefore, even when a metal-air battery is operated using mechanical charge, as described above, it is possible to suppress adverse effects such as a decrease in output due to an increase in liquid resistance and a battery reaction stop due to contamination of battery components. It is possible to provide a high-power metal-air battery that has a long life and can be used repeatedly.

<Embodiment 15>
As an fifteenth embodiment, an embodiment of the reaction product recovery film 7 will be described. In the example of the shape of the reaction product recovery film 7 described in FIGS. 12 and 13 described in the eighth embodiment, the reaction product recovery film 7 is illustrated as a shape that covers a part of the side surface and the lower part of the negative electrode 1. The shape of the reaction product recovery film 7 is not limited to this, and for example, as shown in FIG. In the reaction product recovery film 7 of the fifteenth embodiment, since the negative electrode 1 covers all surfaces in contact with the electrolytic solution 2, the reaction product is efficiently deposited inside the reaction product recovery film 7. Can do. In addition, since it is the same as that of the said Embodiment 8 except the reaction product collection | recovery film | membrane 7 demonstrated here, description is not repeated.

  Also in the metal-air battery of the fifteenth embodiment, the same effects as those described in the eighth, ninth, tenth, eleventh, twelfth, thirteenth and fourteenth embodiments can be obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Negative electrode 2 Electrolytic solution 3 Positive electrode 4 Conductive holding member (holding member)
41 Reaction Product Recovery Membrane Frame Fixing Hole 5 Container 51 Container Projection 6 Bonding Member 7 Reaction Product Recovery Membrane 71 Reaction Product Recovery Membrane Joint 8 Reaction Product Recovery Membrane Frame 81 Reaction Product Recovery Membrane Frame Fixing Protrusion 82 Frame for reaction product recovery membrane (left)
83 Reaction product recovery membrane frame (right)
84 Frame fixing hole for reaction product recovery membrane (frame)
85 Frame coupling member for reaction product recovery membrane

Claims (6)

A negative electrode containing at least a metal that can be ionized and eluted into the electrolyte;
A positive electrode disposed in contact with the electrolyte;
A metal-air battery comprising: a holding member including a conductive portion that can be held in contact with the negative electrode at a position where the negative electrode is not exposed from the interface between the electrolytic solution and the gas phase.   The metal-air battery according to claim 1, wherein the holding member holds the lower part of the negative electrode.   The metal-air battery according to claim 1, wherein the holding member holds the upper part of the negative electrode.   The metal-air battery according to any one of claims 1 to 3, wherein the holding member holds a plurality of the negative electrodes.   The metal-air battery according to any one of claims 1 to 4, wherein the negative electrode is made of magnesium and an alloy containing 50 atomic% or more of magnesium.   The metal-air battery according to claim 1, further comprising a reaction product recovery film disposed so as to surround at least a part of the negative electrode.

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