Solid film concentration cell and preparation method thereof

Abstract

The invention provides a solid thin film concentration cell and a preparation method thereof, and relates to the technical field of thin film concentration cells. A solid or semi-solid electrolyte film similar to conductive gel is prepared from a conductive material, a hygroscopic inorganic salt and a hydrogel material, the solid or semi-solid electrolyte film is attached to one side of a semi-permeable membrane, by means of the hygroscopicity of the inorganic salt, one side of the conductive gel continuously absorbs water from air, water molecules diffuse and pass through the semi-permeable membrane, and then the other side continuously evaporates water into the air, so that the solid or semi-solid electrolyte film is formed. And a continuous concentration difference is formed on the two sides of the semipermeable membrane.

Description

Technical Field

[0001] The present invention relates to the technical field of thin film concentration difference batteries, and in particular to a solid thin film concentration difference battery and a preparation method thereof. Background Art

[0002] With the increasing demand for new energy sources, both solar and wind power generation have developed rapidly. Since solar cells require sunlight, they cannot be used well on rainy days or at night, which has become a bottleneck for the development of solar energy. Wind power also has geographical limitations, and its power generation is highly dependent on the seasons, making it difficult to obtain a stable power supply. In addition, the initial investment and equipment maintenance of natural energy utilization require a lot of expenses. A new type of power generation device that is less affected by environmental changes and has low cost has been an important development direction in recent years, especially thin-film concentration batteries and air-energy thin-film batteries, which have been widely studied. However, due to the difficulty of packaging, the difficulty of liquid leakage and disposal, and the inconvenience of carrying, their application is greatly restricted.

[0003] The use of solid electrolytes can effectively solve these existing problems, but the requirements of thin-film batteries pose severe challenges to electrolyte film materials. Summary of the invention

[0004] One of the purposes of the present invention is to provide a solid thin film concentration cell, in which a solid or semi-solid electrolyte film similar to a conductive gel is prepared by means of a conductive material, a hygroscopic inorganic salt and a hydrogel material, and is attached to one side of a semipermeable membrane. By utilizing the hygroscopicity of the inorganic salt, one side of the conductive gel continuously absorbs water from the air, and after the water molecules diffuse through the semipermeable membrane, the other side continuously evaporates water into the air, thereby forming a continuous concentration difference on both sides of the semipermeable membrane.

[0005] The second object of the present invention is to provide a method for preparing the solid thin film concentration cell.

[0006] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0007] In a first aspect, the present invention provides a solid thin film concentration cell, comprising a semipermeable membrane and two conductive electrodes, a solid electrolyte film is arranged on one side of the semipermeable membrane, and the two conductive electrodes are respectively connected to the semipermeable membrane and the solid electrolyte film;

[0008] The solid electrolyte film is made of the following raw materials in percentage by mass: 23%-25% conductive material, 12%-20% film-forming resin, 4%-8% hygroscopic inorganic salt and 50-60% water;

[0009] The semipermeable membrane is a membrane that allows water molecules, and ions and molecules with a smaller diameter than water molecules to pass through.

[0010] The following is a detailed description:

[0011] Solid electrolyte film:

[0012] The solid electrolyte film is made of the following raw materials in percentage by mass: 23%-25% of conductive material, 12%-20% of film-forming resin, 4%-8% of hygroscopic inorganic salt and 50%-60% of water.

[0013] The conductive material is one or more selected from conductive graphite, graphene, polyaniline, polypyrrole, metal copper powder, and metal nickel powder;

[0014] Based on the total mass of the solid electrolyte film raw material, the content of the conductive material is, for example, 23%, 24%, or 25%.

[0015] The film-forming resin is one or more selected from styrene-acrylic emulsion (solid content of about 45-50%), polyacrylate emulsion (solid content of about 45-50%), polyvinyl alcohol, cellulose ether, and polyvinyl pyrrolidone;

[0016] These resin chains have hydrophilic groups and can be designed to form hydrogels with three-dimensional network structures in water through cross-linking schemes.

[0017] Based on the total mass of the solid electrolyte thin film raw material, the content of the film-forming resin is, for example, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20%.

[0018] The hygroscopic inorganic salt refers to an inorganic salt that can absorb moisture in the air when the air humidity is less than 40. The hygroscopic inorganic salt is one or more selected from calcium chloride, lithium chloride, potassium acetate, potassium carbonate, magnesium bromide, magnesium nitrate, and magnesium chloride.

[0019] The content of the hygroscopic inorganic salt is, for example, 4%, 5%, 6%, 7%, or 8% based on the total mass of the solid electrolyte film raw material.

[0020] The water content is, for example, 50%, 55%, or 60%.

[0021] Preferably, the method for preparing the solid electrolyte film comprises the following steps:

[0022] Conductive material, film-forming resin, hygroscopic inorganic salt and water are uniformly mixed according to the formula content to form a slurry, and a film is applied according to the design thickness (20-80 μm) within 30 minutes, and vacuum freeze-dried and solidified to obtain a solid electrolyte film of corresponding thickness.

[0023] Semipermeable membrane:

[0024] The semipermeable membrane selected in the present invention is a solid film;

[0025] Preferably, the semipermeable membrane is a printable composite cross-linked semipermeable membrane material, and the raw materials for preparing the semipermeable membrane include the following components in parts by weight:

[0026] 0.4-2.4 parts by weight of hydrophilic polymer;

[0027] 13-25 parts by weight of polymer resin;

[0028] Cross-linking agent 0.25-3.3 parts by weight;

[0029] 1-6 parts by weight of initiator;

[0030] Water 5-35 parts by weight;

[0031] Wherein, the hydrophilic polymer includes polyvinyl alcohol and / or hydroxyethyl cellulose; the polymer resin includes waterborne polyurethane and / or polymethacrylate emulsion.

[0032] Conductive Electrode:

[0033] Preferably, the conductive electrode is a platinum electrode or a copper electrode or a coated electrode, preferably a printable thin film electrode material.

[0034] The raw materials for preparing the printable thin film electrode material include the following components in parts by weight:

[0035] 0.014-0.025 parts by weight of graphite, or 1.0-1.9 parts by weight of polyurethane;

[0036] 1.5-2.0 parts by weight of aniline monomer;

[0037] DBSA 18-23 parts by weight;

[0038] 0.5-2.5 parts by weight of the first initiator;

[0039] 1.5-3.5 parts by weight of the second initiator;

[0040] Peroxide 0.1-0.3 parts by weight;

[0041] Water 60-75 parts by weight;

[0042] The peroxide is hydrogen peroxide and / or tert-butyl hydroperoxide;

[0043] The method for preparing the printable thin film electrode material comprises the following steps:

[0044] (1) dispersing a selected amount of graphite or polyurethane in a selected amount of water, adjusting the pH of the system to a strong acid, and adding a selected amount of the first initiator to initiate a reaction, thereby forming free radical groups on the chains of the graphite or polyurethane to obtain a reaction liquid;

[0045] (2) continuing to add a selected amount of the aniline monomer, DBSA and the second initiator to the reaction system and mixing them to react, so that the aniline monomer grows on the graphite or polyurethane after entering the solution to form a star-shaped or branch-shaped composite material;

[0046] (3) Continue to add a selected amount of the peroxide to obtain a stable desired polyaniline composite material system.

[0047] The principle of concentration difference battery is different from that of lithium battery. The positive and negative electrode materials used in it are of the same type. It does not rely on electrochemical reactions on the electrodes to generate current, but requires a semipermeable membrane to maintain the concentration difference on both sides of the membrane. Therefore, the solid electrolyte film in the present invention is different from the solid electrolyte used in current all-solid-state lithium-ion batteries to replace the traditional organic liquid electrolyte. The new solid electrolyte film material not only needs to transmit electrons, but also needs to be able to remain in a solid or semi-solid state on one side of the semipermeable membrane (one side absorbs moisture, water is stored inside the hydrogel, diffuses through the semipermeable membrane and evaporates on the other side).

[0048] In some embodiments, the structure of the solid thin film concentration difference battery is as follows Figure 1 As shown, it includes a semipermeable membrane 1 and two conductive electrodes 3. A solid electrolyte film 2 is arranged on one side of the semipermeable membrane 1. The two conductive electrodes 3 are connected to the semipermeable membrane 1 and the solid electrolyte film 2 respectively.

[0049] Preferably, the solid thin film concentration difference cell further comprises an outer packaging layer 4 (eg, a plastic film, a UV-curable printed coating).

[0050] In order to facilitate the inorganic salt on one side of the solid electrolyte film to absorb moisture in the air and the other side of the semipermeable membrane to facilitate the evaporation of moisture, windows (openings, holes) are opened on the packaging layer 4 on one side of the solid electrolyte film and the other side of the semipermeable membrane, with a specification of 1-3mm 2 .

[0051] When the solid film concentration cell is placed in a humid environment, the inorganic salt selected in the solid electrolyte film 2 is hygroscopic and absorbs moisture in the air. The moisture on one side of the solid electrolyte film increases to form a salt solution. The water molecules in the solution (and may carry a very small amount of inorganic salt) penetrate through the semipermeable membrane 1 to the other side, forming a concentration difference of the salt solution on both sides of the semipermeable membrane 1. The conductive electrodes 3 on both sides form a concentration cell. The voltage of the concentration cell is only related to the concentration difference at both ends of the semipermeable membrane, and the generated voltage is then derived through the electrodes connected on both sides. At the same time, water evaporates on one side, driving the water molecules on the other side to continuously diffuse to this side. If the evaporation stops, the battery cannot provide electrical energy within a certain period of time.

[0052] There are two principles that need to be explained in this process. First, the vapor pressure of the saturated solution of salt is selected to be lower, which is convenient for absorbing moisture from the environment and has a wider working range. If there are two extreme cases, such as the air is particularly dry, no water molecules are absorbed, and the battery cannot work at this time. If the humidity in the air is very high, the water absorption on one side of the solid electrolyte increases and the concentration decreases. At the same time, it is difficult for the other side to evaporate in a high humidity environment. In this case, it is also difficult to obtain electrical energy, and the battery will be in a state of equilibrium. If it is in an extreme state for a long time, such as an environment with 100% humidity for a month, the battery may also fail due to long-term stagnation. In general, the working conditions of the battery are best when the humidity is 30-85%.

[0053] In other embodiments, the structure of the solid thin film concentration difference battery is as follows Figure 2 As shown, it includes a semipermeable membrane 1 and two conductive electrodes 3, a solid electrolyte film 2 is arranged on one side of the semipermeable membrane 1, and a blank solid electrolyte film 5 is arranged on the other side, and the two conductive electrodes 3 are respectively connected to the solid electrolyte film 2 and the blank solid electrolyte film 5; wherein the difference between the blank solid electrolyte film and the solid electrolyte film is that the blank solid electrolyte film does not contain hygroscopic inorganic salts.

[0054] Preferably, the solid thin film concentration difference cell further comprises an outer packaging layer 4 (eg, a plastic film, a UV-curable printed coating).

[0055] In order to facilitate the inorganic salt on one side of the solid electrolyte film to absorb moisture in the air, and the blank solid electrolyte film on the other side of the semipermeable membrane to facilitate moisture evaporation, windows (openings, holes) are opened on the packaging layer 4 on one side of the solid electrolyte film and the blank solid electrolyte film, with a specification of 1-3mm 2 .

[0056] When the solid film concentration cell is placed in a humid environment, the inorganic salt selected in the solid electrolyte film 2 is hygroscopic and absorbs moisture in the air. The moisture on one side of the solid electrolyte film increases, and the moisture and a very small amount of inorganic salt permeate through the semipermeable membrane 1 to the blank solid electrolyte film 5 on the other side. The inorganic salts on the solid electrolyte film and the blank solid electrolyte film on both sides of the semipermeable membrane 1 form a concentration difference, and the conductive electrodes 3 on both sides form a concentration cell. The voltage of the concentration cell is only related to the concentration difference at both ends of the semipermeable membrane, and the generated voltage is then derived through the electrodes connected on both sides.

[0057] In order to prevent the salt concentration from gradually increasing due to the continuous evaporation of water on the other side of the semipermeable membrane, a semipermeable membrane with good performance is required to prevent too much salt from passing through the semipermeable membrane. In the solid-state battery, the quality of the semipermeable membrane directly affects the service life of the battery. The above-mentioned printable composite cross-linked semipermeable membrane material is preferred.

[0058] In a second aspect, the present invention provides a method for preparing the above-mentioned solid thin film concentration difference battery, comprising the following steps:

[0059] The conductive electrode is adhered to a packaging material (such as a plastic film), a semipermeable membrane is sandwiched in the packaging material, a solid electrolyte film is placed on one side of the semipermeable membrane with an overlapping portion with the conductive electrode, and then the packaging material is plastic-sealed.

[0060] Preferably, windows are opened in the packaging material on one side of the solid electrolyte film and on one side of the semipermeable membrane.

[0061] In some embodiments, the method for preparing a solid thin film concentration cell comprises the following steps:

[0062] The conductive electrode is adhered to the packaging material (plastic film), a semipermeable membrane is sandwiched in the packaging material, a solid electrolyte film is placed on one side of the semipermeable membrane, and a blank solid electrolyte film is placed on the other side with an overlapping portion with the conductive electrode, and then the packaging material is plastic-sealed.

[0063] Preferably, windows are opened in the packaging material on one side of the solid electrolyte film and on one side of the blank solid electrolyte film.

[0064] In actual production, UV light curing (after applying one layer, use ultraviolet light to quickly cure the layer, and then apply the next layer) can also be used for packaging. (UV packaging is also the last layer, similar to plastic packaging. The middle layer can be printed, but because it cannot be UV resin, it requires drying time.)

[0065] Beneficial Effects

[0066] (1) The present invention mainly utilizes conductive materials, inorganic salts and hydrogel materials to prepare solid or semisolid electrolyte films. Since the selected inorganic salts are hygroscopic, they will take water from a humid environment and maintain the state of conductive gel after obtaining water. The conductive gel is attached with a semipermeable membrane, which only allows water molecules to pass through, and salts and molecular ions with large radius cannot pass through. After the water molecules pass through the semipermeable membrane, a concentration difference is formed on both sides of the semipermeable membrane (1. The semipermeable membrane cannot completely isolate the salt, such as retaining 99.5%, then a concentration difference of the inorganic salt in the gel will be formed on both sides. Generally speaking, the quality of the semipermeable membrane determines the life of the battery; 2. It is difficult for the semipermeable membrane to achieve 100% purity. On the side without hydrogel, as long as water passes through, conductivity will occur. At this time, because the ionic strength on both sides is different, the ionization of water also changes. The hydrogen ions or hydroxide ions of the ionized water can move, and a concentration difference may also be formed on both sides). The electrodes on both sides form a concentration difference battery. When one side of the hydrogel continuously absorbs water, the water diffuses through the semipermeable membrane, and the other side continuously evaporates water into the air, and continuously absorbs water-diffusion-evaporation maintains the continuous operation of the entire battery. Its essence is to use the difference in saturated vapor pressure of the solutions on both sides to convert the micro energy in the air into electrical energy. The concentration difference caused by the evaporation of water from the air provides an energy source for the continuous generation of electrical energy, resulting in a solid concentration difference battery with sustainable discharge. When there is energy in the air to evaporate water, the battery can continue to operate, but when the energy in the air is small and water cannot evaporate, the battery cannot continue to supply power.

[0067] (2) The present invention is essentially a device that converts air energy into electrical energy. Especially after being prepared into a thin-film battery, it is easy to carry and has obvious advantages over traditional concentration difference batteries. At the same time, it is a battery that can generate electricity continuously. It is not an energy storage device, but a device that can provide power continuously.

[0068] (3) The present invention achieves efficient and stable electricity generation through the design of semipermeable membranes and solid electrolyte materials as well as the structural design of the battery. The present invention solves the portability problem of liquid concentration batteries. Solid-state concentration batteries have a stable structure and a small size. Due to their sheet-like structure, they can be applied to some scenarios that have this demand. By controlling the air humidity, the operation of the battery is controlled, the loss is reduced, and it can be stored for a long time. Solid-state concentration batteries are used in portable mobile power supplies or distributed energy systems.

[0069] The present invention has been described in detail above, but the above embodiments are only illustrative in nature and are not intended to limit the present invention. In addition, this article is not limited by any theory described in the above prior art or invention content or the following examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 A schematic diagram of the structure of the solid thin film concentration difference battery of Example 1 is shown;

[0071] Figure 2 A schematic structural diagram of the solid thin film concentration battery of Example 2 is shown.

[0072] Illustration: 1-semipermeable membrane; 2-solid electrolyte film; 3-conductive electrode; 4-encapsulation layer; 5-blank solid electrolyte film.

[0073] Figure 3 The discharge performance of Example 1 under different humidity environments is shown.

[0074] Figure 4 The discharge performance of Example 2 under different humidity environments is shown.

[0075] Figure 5 The discharge performance of Example 3 under different humidity environments is shown.

[0076] Figure 6 The discharge performance of Example 4 under different humidity environments is shown. DETAILED DESCRIPTION

[0077] The present invention is further described below in conjunction with examples. It should be noted that the following examples are provided for illustrative purposes only and do not constitute a limitation on the scope of protection claimed for the present invention.

[0078] Unless otherwise specified, the raw materials, reagents, methods, etc. used in the examples are conventional raw materials, reagents, methods in the art.

[0079] raw material:

[0080] The semipermeable membrane of the embodiment adopts the semipermeable membrane of Example 1 in patent CN 113527730 B.

[0081] The conductive electrode of the embodiment adopts the molding material of embodiment 1 in patent CN 113337114 B.

[0082] Evaluation method:

[0083] Gel property: The gel itself is not flowing, nor is it completely solid. Good gel property: it is not completely water-soluble, but can have a large reserve, such as a swelling degree of 300-1000%;

[0084] Hygroscopicity: The weight change caused by hygroscopicity at different humidity, the size of the open circuit voltage after assembling the battery, the time to maintain a higher voltage, etc. The hygroscopicity at different humidity is mainly caused by inorganic salts; Poor hygroscopicity: The dry film cannot form a gel in an environment with 30-85% humidity; Good hygroscopicity: The dry film can turn into a gel in an environment with 30-85% humidity.

[0085] Conductivity: caused by conductive materials and inorganic salts, it can reduce the internal resistance of the battery; poor conductivity: internal resistance is more than tens of megohms, good conductivity: internal resistance is less than 1000 ohms.

[0086] Preparation Examples 1-4, Comparative Preparation Example 1 Preparation of Solid Electrolyte Film

[0087] First, add some water to the blender, dissolve the inorganic salt in it and set it aside; add the film-forming resin to another blender, add the remaining water to adjust the viscosity, then slowly add the conductive material, stir evenly, then add the prepared inorganic salt solution, mix for 5-10 minutes, start coating, complete the coating within 30 minutes, and vacuum freeze-dry.

[0088] The mass ratio of the raw materials in each preparation example is as follows (mass unit is gram):

[0089]

[0090] The comparative example cannot absorb moisture, cannot produce concentration difference, and cannot generate electricity.

[0091] Example 1-4 Preparation of solid thin film concentration cell

[0092] The solid electrolyte films of Preparation Examples 1-4 were used to prepare solid thin film concentration difference cells with the following structures:

[0093] The conductive electrode is adhered to the plastic film, a semipermeable membrane is sandwiched in the plastic film, a solid electrolyte film (preparation example 1-4) is placed on one side of the semipermeable membrane, and the solid electrolyte film overlaps with the conductive electrode, and then the plastic film is plastic-sealed. A window (1-3 mm) is opened on the plastic film on one side of the solid electrolyte film and on the other side of the semipermeable membrane. 2 ).

[0094] Example 5-8 Preparation of solid thin film concentration cell

[0095] The solid electrolyte films of Preparation Examples 1-4 were used to prepare solid thin film concentration difference cells with the following structures:

[0096] The conductive electrode is adhered to the plastic film, a semipermeable membrane is sandwiched in the plastic film, a solid electrolyte film (preparation example 1-4) is placed on one side of the semipermeable membrane, and a blank solid electrolyte film (the difference from the solid electrolyte film of the corresponding preparation example is that there is no inorganic salt, and other components are the same) is placed on the other side, and there is an overlapping part with the conductive electrode, and then the plastic film is plastic-sealed. Open windows (1-3mm) on the plastic film on one side of the solid electrolyte film and on the other side of the blank solid electrolyte film. 2 ).

[0097] Experimental example: Application effect of solid thin film concentration difference battery in different environments

[0098] The discharge performance of Examples 1-4 at room temperature and under different humidity conditions was tested respectively:

[0099] The discharge performance of Example 1 under different humidity conditions (A1: humidity 75%; A2: humidity 80%; A3: humidity 85%; A4: humidity 93%; A5: humidity 95%) is as follows Figure 3 The discharge performance of Example 2 under different humidity (B1: humidity 85%; B2: humidity 88%; B3: humidity 90%; B4: humidity 93%; B5: humidity 98%) is shown in FIG. Figure 4 As shown. In the case of high humidity environment, the discharge voltage is small. The discharge performance of Example 3 under different humidity (C1: humidity 45%; C2: humidity 70%; C3: humidity 75%; C4: humidity 90%; C5: humidity 95%), as shown Figure 5 The discharge performance of Example 4 under different humidity conditions (D1: humidity 35%; D2: humidity 75%; D3: humidity 80%; D4: humidity 83%; D5: humidity 85%) is shown in FIG. Figure 6 shown.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features thereof may be replaced by equivalents, without departing from the spirit and essence of the claims of the present invention; and these modifications or replacements are still within the scope defined by the claims of the present invention.

Claims

1. A solid thin film concentration cell, characterized in that: It includes a semipermeable membrane and two conductive electrodes, a solid electrolyte film is arranged on one side of the semipermeable membrane, and the two conductive electrodes are respectively connected to the semipermeable membrane and the solid electrolyte film; The solid electrolyte film is made of the following raw materials in percentage by mass: 23%-25% conductive material, 12%-20% film-forming resin, 4%-8% hygroscopic inorganic salt and 50-60% water; The semipermeable membrane is a membrane that allows water molecules, and ions and molecules with a smaller diameter than water molecules to pass through.

2. The solid thin film concentration cell according to claim 1, characterized in that: The conductive material is one or more selected from conductive graphite, graphene, polyaniline, polypyrrole, metal copper powder, and metal nickel powder; The film-forming resin is one or more selected from styrene acrylic emulsion, polyacrylate emulsion, polyvinyl alcohol, cellulose ether, and polyvinyl pyrrolidone; The hygroscopic inorganic salt is one or more selected from calcium chloride, lithium chloride, potassium acetate, potassium carbonate, magnesium bromide, magnesium nitrate and magnesium chloride.

3. The solid thin film concentration cell according to claim 1, characterized in that: The semipermeable membrane is a printable composite cross-linked semipermeable membrane material, and the raw materials for preparation include the following components in parts by weight: 0.4-2.4 parts by weight of hydrophilic polymer; 13-25 parts by weight of polymer resin; Cross-linking agent 0.25-3.3 parts by weight; 1-6 parts by weight of initiator; Water 5-35 parts by weight; Wherein, the hydrophilic polymer includes polyvinyl alcohol and / or hydroxyethyl cellulose; the polymer resin includes waterborne polyurethane and / or polymethacrylate emulsion.

4. The solid thin film concentration cell according to claim 1, characterized in that: The conductive electrode is a platinum electrode or a copper electrode or a coated electrode; Preferably, the conductive electrode is a printable thin film electrode material.

5. The solid thin film concentration cell according to any one of claims 1 to 4, characterized in that: The solid film concentration cell also includes an outer packaging layer; windows are opened on the packaging layer on one side of the solid electrolyte film and on the other side of the semipermeable membrane.

6. The solid thin film concentration cell according to any one of claims 1 to 4, characterized in that: The solid thin film concentration cell comprises a semipermeable membrane and two conductive electrodes, a solid electrolyte film is arranged on one side of the semipermeable membrane, and a blank solid electrolyte film is arranged on the other side, and the two conductive electrodes are respectively connected to the solid electrolyte film and the blank solid electrolyte film; wherein the difference between the blank solid electrolyte film and the solid electrolyte film is that the blank solid electrolyte film does not contain hygroscopic inorganic salts.

7. The solid thin film concentration cell according to claim 6, characterized in that: The solid film concentration cell also includes an outer packaging layer; windows are opened on the packaging layer on one side of the solid electrolyte film and on one side of the blank solid electrolyte film.

8. A method for preparing a solid thin film concentration cell according to any one of claims 1 to 7, characterized in that: The following steps are involved: The conductive electrode is adhered to the packaging material, a semipermeable membrane is sandwiched in the packaging material, a solid electrolyte film is placed on one side of the semipermeable membrane with an overlapping portion with the conductive electrode, and then the packaging material is plastic-sealed.

9. The solid thin film concentration cell according to claim 8, characterized in that: The conductive electrode is adhered to the packaging material, a semipermeable membrane is sandwiched in the packaging material, a solid electrolyte film is placed on one side of the semipermeable membrane, and a blank solid electrolyte film is placed on the other side with an overlapping portion with the conductive electrode, and then the packaging material is plastic-sealed.

10. A method for preparing a solid thin film concentration cell according to any one of claims 1 to 7, characterized in that: The following steps are involved: Printing is performed according to the layered structure of the solid thin film concentration difference battery, and then UV light curing is performed.

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