JP7429753B2 - Electrolyte and its manufacturing method - Google Patents

Description

The present invention relates to an electrolyte and a method for producing the same, particularly a colloidal electrolyte, and a method for producing the colloidal electrolyte by a kneading method.

Current forms of electrolytes include solids, liquids, and colloids. Liquid electrolytes have high ionic conductivity and are effective in conducting electricity, but because they have fluidity, they tend to leak when used for long periods of time or are pushed by external forces, making electronic components inoperable. Furthermore, liquid electrolytes contain solvents such as strong acids and strong alkalis, which pose a safety risk if these solvents leak. Solid electrolytes can solve the leakage problem of liquid electrolytes by using polymers or inorganic metal oxides instead of liquid electrolytes, but since there is an interface resistance between solid electrolytes and electrodes, solid electrolytes Its ionic conductivity is not high, and the performance of electronic components is undesirable. Colloidal electrolytes are between solid electrolytes and liquid electrolytes, have the advantages of both, and will become the mainstream of future electrolyte materials. However, currently common colloidal electrolytes have problems such as non-uniform concentration distribution, poor light transmittance, and low conductivity.Therefore, it is necessary to improve conventional colloidal electrolytes.

One objective of the present invention is to provide an electrolyte with the properties of high viscosity, high light transmittance and high conductivity at the same time.

Another object of the present invention is to provide a method for producing an electrolyte, which is characterized in that the finished product is easily preserved and productivity is increased.

A further object of the present invention is a colloidal electrolyte useful in the fields of electrochemical energy storage and energy saving technologies, such as electrochromic technology, polymer lithium batteries, supercapacitance and superbatteries, and a manufacturing method for producing the colloidal electrolyte by a kneading method. The goal is to provide the following.

In order to achieve the above and other objects, the electrolyte of the present invention includes a polymeric material, a lithium salt, an organic solvent, a plasticizer, an ionic solution, and an auxiliary material, which are kneaded together. The polymer material is about 20-45% by weight, the lithium salt is about 2-20% by weight, the organic solvent is about 10-30% by weight, and the plasticizer is about 10-45% by weight. 30% by weight, the ionic solution is about 1-4% by weight, and the auxiliary material is about 1-4% by weight.

In order to achieve the above and other objects, the method for producing an electrolyte of the present invention involves reacting a polymeric material at a reaction temperature of about 50 to 70°C for about 15 to 30 minutes, and dehydrating and drying it to obtain a dry polymeric material. a drying step to obtain a colloidal electrolyte by uniformly stirring the dry polymeric material with a lithium salt, an organic solvent, a plasticizer, an ionic solution and an auxiliary material to obtain a colloidal electrolyte; a kneading step of reacting at a reaction temperature for about 2 to 10 minutes and kneading to homogenize the colloidal electrolyte.

In some embodiments of the invention, the polymeric material is a thermoplastic polymeric material or a thermoset polymeric material, such as polyvinyl butyral (PVB), vinyl acetate copolymer (EVA), epoxy resin (EP), etc. and polyethylene (PE) or other alternative materials.

In some embodiments of the invention, the lithium salt is lithium hexafluorophosphate (LiPF ₆ ), lithium tetrafluoroborate (LiBF ₄ ), lithium perchlorate (LiClO ₄ ), lithium hexafluoroarsenate ( LiAsF ₆ ), lithium trifluoromethylsulfonate (LiCF ₃ SO ₃ ), lithium bis(oxalate)borate (LiBOB), lithium difluoro(oxalato)borate (LiODFB), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) , lithium bis(fluorosulfonyl)imide (LiFSI), lithium difluorophosphate (LiPO ₂ F ₂ ), and lithium tetrafluorooxalate phosphate (LiFOP) or other possible substitutes. It is a good material.

In some embodiments of the invention, the organic solvent consists of propylene carbonate (PC), ethylene carbonate (EC), propyl butyrate (γ-BL), N-methyl-pyrrolidine (NMP), and dimethyl carbonate (DMC). at least one material selected from the group or other alternative materials.

In some embodiments of the invention, the plasticizer is selected from Diethylene Glycol Monobutyl Ether or Adipic acid.

In some embodiments of the invention, the ionic solution consists essentially of primarily cyclopropyl.

In some embodiments of the invention, the auxiliary material is at least one material selected from the group consisting of toner, UV absorber, light stabilizer, temperature stabilizer, and silicon powder.

In some embodiments of the present invention, the colloidal electrolyte kneaded in the kneading step is extruded and granulated using a high-speed cutter while rapidly cooling and drying to produce a granular electrolyte. further including steps.

In some embodiments of the invention, in the extrusion granulation step, the operating temperature is about 100-140° C., the extrusion pressure is about 0.2-1 megapascals (MPa), and the granules produced The size of the electrolyte granules is approximately 1 to 30 mm.

In some embodiments of the present invention, the colloidal electrolyte kneaded in the kneading step is heated at 80 to 150° C. to melt it to form a fluid colloid, and a slit-like discharge port whose opening diameter size can be adjusted is disposed at the tip. Injecting the fluid colloid into a cavity of a coating head having a coating head using the pressure of the cavity, causing the fluid colloid to uniformly flow out from the slit-shaped discharge port, and applying the fluid colloid onto a release film to form an adhesive film structure; Next, the method further includes forming a first colloidal electrolyte membrane by rapidly lowering the temperature using an air knife and controlling the thickness to form a colloidal electrolyte membrane.

In some embodiments of the invention, the granular electrolyte produced in the extrusion granulation step is reacted at a reaction temperature of about 70-140° C. for about 2-10 minutes and kneaded to form the granular electrolyte. The second colloidal electrolyte is heated at about 80 to 150°C to melt it and become a fluid colloid, which is then flowed into a cavity of a coating head having a slit-shaped discharge port with an adjustable opening diameter at the tip. The fluid colloid is injected by the pressure of the cavity, the fluid colloid is uniformly flowed out from the slit-shaped discharge port, and is applied onto the release film to form an adhesive film structure. The method further includes forming a second colloidal electrolyte membrane by controlling the thickness of the membrane.

In some embodiments of the present invention, the colloidal electrolyte body kneaded in the kneading step is extruded at a temperature of about 80 to 160°C, a wind pressure of an air knife jet of about 95 to 1000 kilopascals (kPa), and an extrusion pressure of about 0.5 The method further includes a third colloidal electrolyte membrane forming step of heating and extruding at ~1 megapascal (MPa) to form a colloidal electrolyte membrane having a thickness of approximately 0.005 to 3 mm.

In some embodiments of the invention, the granular electrolyte produced in the extrusion granulation step is heated to a viscous colloid by an extrusion flow process at about 70-140°C; The viscous colloid is heated and extruded at an extrusion temperature of about 80 to 160°C, a wind pressure of about 95 to 1000 kilopascals (kPa) from the air knife nozzle, and an extrusion pressure of about 0.5 to 1 megapascal (MPa) to a thickness of about 0. The method further includes a fourth colloidal electrolyte membrane forming step of forming a colloidal electrolyte membrane with a thickness of .005 to 3 mm.

The beneficial effects of the present invention are as follows.

In the colloidal electrolyte of the present invention, by employing specific components and specific ratios between each component and uniformly dispersing each component by kneading, the colloidal electrolyte has low fluidity due to high cohesive mechanical properties. . The ionic conductivity is also clearly improved compared to solid electrolytes, realizing properties such as high ionic conductivity, no need for spacers, and useful for adhesion to glass, plastic, etc. It is highly safe to avoid liquid leakage, and also has high adhesiveness, high light transmittance and high conductivity.

The electrolyte of the present invention can be used as an electrolyte layer of an electrochromic device, and can also be produced using adhesive technology. Additionally, the electrolytes of conventional energy storage components such as supercapacitances, lithium polymer batteries, and superbatteries can all be isolated from the electrodes in combination with separators to avoid electrode conduction. Comparing these, when the electrolyte of the present invention is made into an adhesive film, it can be used as a spacer between two electrodes and as a barrier for ion transfer and electrons.

1 is a flowchart of an embodiment of the electrolyte manufacturing method of the present invention. 3 is a flow chart of another embodiment of the method for producing an electrolyte of the present invention. 3 is a flow chart of another embodiment of the method for producing an electrolyte of the present invention. 3 is a flow chart of another embodiment of the method for producing an electrolyte of the present invention. 3 is a flow chart of another embodiment of the method for producing an electrolyte of the present invention. 3 is a flow chart of another embodiment of the method for producing an electrolyte of the present invention.

FIG. 1 is a flowchart of an embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 1, the electrolyte of this example includes a polymer material, a lithium salt, an organic solvent, a plasticizer, an ionic solution, and an auxiliary material, which are kneaded to form a colloid. This is what I did. The polymeric material is about 20-45% by weight, the lithium salt is about 2-20% by weight, the organic solvent is about 10-30% by weight, the plasticizer is about 10-30% by weight, and the ionic solution is about 10-30% by weight. About 1-4% by weight, the supplementary material about 1-4% by weight.

Preferably, the polymeric material is a thermoplastic polymeric material or a thermosetting polymeric material, and is selected from polyvinyl butyral (PVB), vinyl acetate copolymer (EVA), epoxy resin (EP) and polyethylene (PE). or other alternative materials. In this example, the thermoplastic polymeric material is polyvinyl butyral (PVB), which primarily functions as providing an ionic conduction path, improving the cohesiveness and ionic conductivity of the colloidal electrolyte, as well as providing excellent electronic Has insulation properties.

Preferably, the lithium salt is lithium hexafluorophosphate (LiPF ₆ ), lithium tetrafluoroborate (LiBF ₄ ), lithium perchlorate (LiClO ₄ ), lithium hexafluoroarsenate (LiAsF ₆ ), trifluoromethyl Lithium sulfonate (LiCF ₃ SO ₃ ), lithium bis(oxalate)borate (LiBOB), lithium difluoro(oxalato)borate (LiODFB), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(fluorosulfonyl) At least one material selected from the group consisting of imide (LiFSI), lithium difluorophosphate (LiPO ₂ F ₂ ), and lithium tetrafluorooxalate phosphate (LiFOP) or other alternative materials. In this example, the lithium salt is lithium perchlorate (LiClO4), which can dissociate to generate ions, which impart a desirable ion conduction function by moving between the thermoplastic polymers.

Preferably, the organic solvent is at least one selected from the group consisting of propylene carbonate (PC), ethylene carbonate (EC), propyl butyrate (γ-BL), N-methyl-pyrrolidine (NMP) and dimethyl carbonate (DMC). seed material or other alternative materials. The organic solvent provides a transport site for the lithium ions and assists in their dissociation from the lithium salt. The organic solvent preferably has high boiling characteristics.

Preferably, the plasticizer is selected from Diethylene Glycol Monobutyl Ether or Adipic acid. In this example, the plasticizer is diethylene glycol butyl ether. Addition of the plasticizer improves the translucency of the electrolyte, improving the applicability of the electrolyte, and particularly making it possible to apply it to electrochromic devices (ECD).

Preferably, the ionic solution consists essentially of cyclopropyl. In this example, the ionic solution has a chlorate group in the main cyclopropyl group [(Pmim)(ClO ₄ )]. The ionic solution provides conductive ions other than lithium ions, increases the ionic concentration of the electrolyte, and also increases the environmental stability of lithium ions.

Preferably, the auxiliary material is at least one material selected from the group consisting of toner, UV absorber, light stabilizer, temperature stabilizer and silicon powder. The toner may be a colorant of any color and is useful for filtering and depth adjustment. The UV absorber is titanium dioxide, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, a mixture of 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole and triazole. It can extend the life of the adhesive and improve its weather resistance. The light stabilizer is mainly composed of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and can avoid deterioration due to oxidative decomposition of polymers that absorb UV light. . The temperature stabilizer is mainly composed of ethylene glycol (EG) and improves the low-temperature freezing resistance and high-temperature volatility resistance of the adhesive. The silicon powder may be particles of any shape from 10 ⁵ to 10 nanometers, and improves the mechanical and electrical insulation properties of the adhesive.

After mixing the thermoplastic polymer, the lithium salt, and the organic solvent, the thermoplastic polymer is swollen with the organic solvent to form a polymer network. Highly electronegative atoms (eg, oxygen) or hydroxy groups (ie, OH-) on the main chain or side chain of the thermoplastic polymer have unpaired electrons. Therefore, the lithium ions (Li+) dissociated from the lithium salt form temporary coordination bonds with the thermoplastic polymer, and are easily transmitted within the polymer network. The presence of the organic solvent provides another mode of conduction for lithium ions, allowing them to move through the colloidal polyelectrolyte through the organic solvent.

The method for producing an electrolyte of this embodiment includes a drying step S0 in which a polymeric material is reacted at a reaction temperature of approximately 50 to 70°C for approximately 15 to 30 minutes, and then dehydrated and dried to obtain a dry polymeric material; A material mixing step S1 of uniformly stirring the material with a lithium salt, an organic solvent, a plasticizer, an ionic solution and an auxiliary material to obtain a colloidal electrolyte; The method includes a kneading step S2 in which the colloidal electrolyte is made uniform by reacting for a minute and kneading the colloidal electrolyte. In this embodiment, in the material mixing step S1, stirring is performed using a stirrer, and in the kneading step S2, a kneader is used to uniformly mix the colloidal electrolyte by mechanical force and chemical action.

FIG. 2 is a flowchart of another embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 2, preferably, in the method of this embodiment, the colloidal electrolyte kneaded in the kneading step S2 is extruded, and while granulating using a high-speed cutter, the temperature is rapidly lowered and dried to form granules. The method further includes an extrusion granulation step S3 for producing a shaped electrolyte. In this example, the colloidal electrolyte is extruded by a screw, and then rapidly cooled down and dried by a high-speed cutter using a granulator to become a granular electrolyte, thus making it easy to store the finished product. This makes it advantageous for use in subsequent processes. Regarding temperature lowering and drying, for example, after lowering the temperature with water or an organic solvent, drying may be performed by an air drying method.

Preferably, the extrusion granulation step S3 has an operating temperature of about 100-140° C., an extrusion pressure of about 0.2-1 megapascals (MPa), and a granule size of the produced granular colloidal electrolyte of about 1-140° C. It is 30mm. In this example, the size of the electrolyte granules is 4 mm, the operating temperature is 105° C., and the extrusion pressure is 0.8 megapascals (MPa).

FIG. 3 is a flowchart of another embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 3, preferably, from the viewpoint of ease of handling in subsequent processes, the electrolyte manufacturing method of this embodiment is such that the colloidal electrolyte kneaded in the kneading step S2 is heated at about 80 to 150°C to melt it. The fluid colloid is made into a fluid colloid, and the fluid colloid is injected into a cavity of a coating head having a slit-shaped discharge port at the tip with an adjustable opening diameter by the pressure of the cavity. Further, a first colloidal electrolyte membrane forming step S41 is performed, in which the colloidal electrolyte membrane is uniformly flowed out, coated on a release membrane to form an adhesive membrane structure, and rapidly cooled with an air knife to form a colloidal electrolyte membrane by controlling the thickness. include. In this example, the heating and melting temperature was set to 95°C, and the fluid colloid was injected into the cavity of the coating head having a slit-shaped discharge port at the tip with an adjustable opening diameter by the pressure of the cavity. uniformly flows out from the slit-shaped discharge port of the coating head, and as the fluid colloid is applied onto the release film, it forms an adhesive film structure, and the temperature of the adhesive film is rapidly lowered using an air knife to reduce the thickness of the adhesive film. control to form a colloidal electrolyte membrane.

FIG. 4 is a flowchart of another embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 4, preferably, from the viewpoint of ease of handling in subsequent processes, the electrolyte production method of this embodiment is performed by heating the granular electrolyte produced in the extrusion granulation step S3 at a temperature of about 70 to 140°C. The granular electrolyte is reacted for about 2 to 10 minutes at a reaction temperature of The fluid colloid is injected into the cavity of the coating head which has a slit-shaped discharge port at the tip whose diameter size can be adjusted by the pressure of the cavity, the fluid colloid is uniformly flowed out from the slit-shaped discharge port, and the mold is released. It further includes a second colloidal electrolyte membrane forming step S42 of coating the membrane to form an adhesive membrane structure, rapidly lowering the temperature using an air knife, and controlling the thickness of the adhesive membrane to form a colloidal electrolyte membrane. In this example, the reaction temperature was 90°C and the reaction time was 5 minutes, and the granular electrolyte was made into a colloidal electrolyte using a kneader, and then the colloidal electrolyte was heated at 95°C to melt it. Then, the fluid colloid is made into a fluid colloid, and the fluid colloid is injected into the cavity of the coating head by the pressure of the cavity. The tip of the coating head is a slit-shaped discharge port whose opening diameter size can be adjusted, and the fluid colloid flows out from the slit-shaped discharge port of the coating head and forms an adhesive film structure as it is coated onto the release film. . Here, the release film is a paper film, a cloth film, or a plastic film. The temperature of the adhesive film is rapidly lowered using an air knife, and the thickness of the adhesive film is controlled to form a colloidal electrolyte membrane.Finally, a release film is coated, and a colloidal electrolyte membrane is obtained using an adhesive film winding device.

FIG. 5 is a flowchart of another embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 5, preferably, from the viewpoint of ease of handling in subsequent processes, the electrolyte manufacturing method of this embodiment is such that the colloidal electrolyte body kneaded in the kneading step S2 is extruded at a temperature of about 80 to 160° C. with an air knife. A colloidal electrolyte membrane having a thickness of about 0.005 to 3 mm is formed by heating and extruding at an air pressure of about 95 to 1000 kilopascals (kPa) at the injection port and an extrusion pressure of about 0.5 to 1 megapascals (MPa). The method further includes a step S43 of forming a three-colloidal electrolyte membrane. In this example, the extrusion temperature was 120°C, the blowing angle of the air knife nozzle was 90° to 105°, the cap of the extrusion nozzle was 1 mm, and the extrusion pressure was 0.6 megapascals (MPa). Finally, a colloidal electrolyte membrane with a thickness of 0.6 mm is formed.

FIG. 6 is a flowchart of another embodiment of the electrolyte manufacturing method of the present invention. As shown in FIG. 6, preferably, from the viewpoint of ease of handling in subsequent processes, the electrolyte manufacturing method of this example is such that the granular electrolyte manufactured in the extrusion granulation step S3 is subjected to an extrusion flow spreading method. The viscous colloid is heated at about 70 to 140°C, and then the viscous colloid is extruded at a temperature of about 80 to 160°C, a wind pressure of about 95 to 1000 kilopascals (kPa) at the air knife nozzle, and an extrusion pressure of about 80 to 160°C. The method further includes a fourth colloidal electrolyte membrane forming step S44 of heating and extruding at 0.5 to 1 megapascal (MPa) to form a colloidal electrolyte membrane having a thickness of about 0.005 to 3 mm. In this example, the granular electrolyte was heated at 100°C to form a viscous colloid, the extrusion temperature was 120°C, the wind pressure at the air knife jet was about 100 kilopascals (kPa), and the wind was extruded into a viscous colloid. Exists across the width of the mouth, the blowing angle of the air knife jet is 90° to 105°, the cap of the extrusion jet is about 1 mm, the extrusion pressure is 0.6 megapascals (MPa), and finally , a colloidal electrolyte membrane with a thickness of 0.6 mm is formed.

In the colloidal electrolyte of the present invention, by employing specific components and specific ratios between each component and uniformly dispersing each component by kneading, the colloidal electrolyte has low fluidity due to high cohesive mechanical properties. . The ionic conductivity is also clearly improved compared to solid electrolytes, realizing properties such as high ionic conductivity, no need for spacers, and useful for adhesion to glass, plastic, etc. It is highly safe to avoid liquid leakage, and also has high adhesiveness, high light transmittance and high conductivity.

The electrolyte of the present invention can be used as an electrolyte layer of an electrochromic device, and can also be produced using adhesive technology. Additionally, the electrolytes of conventional energy storage components such as supercapacitances, lithium polymer batteries, and superbatteries can all be isolated from the electrodes in combination with separators to avoid electrode conduction. Comparing these, when the electrolyte of the present invention is made into an adhesive film, it can be used as a spacer between two electrodes and as a barrier for ion transfer and electrons.

S0 Drying step S1 Material mixing step S2 Kneading step S3 Extrusion granulation step S41 First colloidal electrolyte membrane forming step S42 Second colloidal electrolyte membrane forming step S43 Third colloidal electrolyte membrane forming step S44 Fourth colloidal electrolyte membrane forming step

Claims (7)

It contains a polymeric material, a lithium salt, an organic solvent, a plasticizer, an ionic solution, and an auxiliary material, and these are kneaded into a colloid, and the polymeric material is 20% by weight. The lithium salt is 2% to 20% by weight, the organic solvent is 10% to 30% by weight, the plasticizer is 10% to 30% by weight, the ionic solution is 1% by weight or more and 2% by weight or less, and the auxiliary material is 1% by weight or more and 2% by weight or less,
The polymer material is a thermoplastic polymer material or a thermosetting polymer material, and is at least one material selected from the group consisting of polyvinyl butyral, vinyl acetate copolymer, epoxy resin, and polyethylene,
The lithium salts include lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium trifluoromethylsulfonate, lithium bis(oxalate)borate, and lithium difluoro(oxalato)borate. , at least one material selected from the group consisting of lithium bis(trifluoromethanesulfonyl)imide, lithium bis(fluorosulfonyl)imide, lithium difluorophosphate, and lithium tetrafluorooxalate phosphate,
The organic solvent is at least one material selected from the group consisting of propylene carbonate, ethylene carbonate, propyl butyrate, N-methyl-pyrrolidine, and dimethyl carbonate,
the plasticizer is selected from diethylene glycol butyl ether or adipic acid;
The ionic solution has a chlorate group in the main cyclopropyl [(Pmim)(ClO ₄ )],
The auxiliary material is selected from the group consisting of a toner as a colorant of any color, a UV absorber, a light stabilizer, a temperature stabilizer, and a silicon powder consisting of particles of any shape between ¹⁰ and 10 nanometers. 1. An electrolyte comprising at least one material . A drying step of reacting the polymeric material at a reaction temperature of 50 to 70°C for 15 to 30 minutes and dehydrating and drying it to obtain a dry polymeric material;
a material mixing step of uniformly stirring the dry polymeric material with a lithium salt, an organic solvent, a plasticizer, an ionic solution and an auxiliary material to obtain a colloidal electrolyte;
A kneading step of reacting the colloidal electrolyte at a reaction temperature of 70 to 140° C. for 2 to 10 minutes and uniformly mixing the colloidal electrolyte using a kneader by mechanical force and chemical action. A method for producing the electrolyte according to claim 1. The colloidal electrolyte kneaded in the kneading step is extruded at an operating temperature of 100 to 140°C and an extrusion pressure of 0.2 to 1 MPa , and while granulating using a high-speed cutter, the temperature is rapidly lowered and dried to form granules. The method for producing an electrolyte according to claim 2, further comprising an extrusion granulation step of producing a granular electrolyte having a size of 1 to 30 mm . The colloidal electrolyte kneaded in the kneading step is heated at 80 to 150°C to melt it to form a fluid colloid, and the fluidity is applied to the cavity of the coating head, which has a slit-shaped discharge port whose opening diameter size can be adjusted at the tip. The colloid is injected by the pressure of the cavity, the fluid colloid is uniformly flowed out from the slit-shaped discharge port, and coated on the release film to form an adhesive film structure.Then, the temperature is rapidly lowered using an air knife. 3. The method of manufacturing an electrolyte according to claim 2 , further comprising forming a first colloidal electrolyte membrane by controlling the thickness of the colloidal electrolyte membrane. The granular electrolyte produced in the extrusion granulation step is reacted at a reaction temperature of 70 to 140°C for 2 to 10 minutes, and kneaded to make the granular electrolyte a second colloidal electrolyte. The fluid colloid is melted by heating at ~150°C to form a fluid colloid, and the fluid colloid is injected into a cavity of a coating head having a slit-shaped discharge port at the tip with an adjustable opening diameter using the pressure of the cavity. The colloid is uniformly flowed out from the slit-shaped discharge port and coated on the release film to form an adhesive film structure.Then, the temperature is rapidly lowered using an air knife, and the thickness of the adhesive film is controlled to remove the colloid. 4. The method for producing an electrolyte according to claim 3 , further comprising a second colloidal electrolyte membrane forming step of forming an electrolyte membrane. The colloidal electrolyte kneaded in the kneading step is extruded by heating at an extrusion temperature of 80 to 160°C, an air pressure of 95 to 1000 kPa from an air knife nozzle, and an extrusion pressure of approximately 0.5 to 1 MPa to form a colloid with a thickness of 0.005 to 3 mm. The method for producing an electrolyte according to claim 2 , further comprising a third colloidal electrolyte membrane forming step of forming an electrolyte membrane. The granular electrolyte produced in the extrusion granulation step is heated at 70 to 140°C by an extrusion flow process to form a viscous colloid, and then the viscous colloid is extruded at a temperature of 80 to 160°C. It is characterized by further comprising a fourth colloidal electrolyte membrane forming step of forming a colloidal electrolyte membrane with a thickness of 0.005 to 3 mm by heating and extruding at an air knife jet pressure of 95 to 1000 kPa and an extrusion pressure of 0.5 to 1 MPa. The method for producing an electrolyte according to claim 3 .