KR102665550B1 - Fabric-based fluid fuel cell and manufacturing method thereof - Google Patents

Abstract

A fabric-based fluid fuel cell is provided to improve performance so that the fuel cell can be operated for a long time. A fabric-based fluid fuel cell includes a main body made of fabric, a flow path formed in the main body through which the fluid flows, a pair of electrode parts printed on the outer surface so that the flow path is partially connected to the main body, and a fluid flow fuel cell. It is composed of a component that is not absorbed and includes a coating portion that is applied to the outer surface of the main body to form a flow path portion.

Description

Fabric-based fluid fuel cell and manufacturing method thereof}

The present invention relates to a fabric-based fluid fuel cell and a method of manufacturing the same, and more specifically, to a fabric-based fluid fuel cell for improving performance so that the fuel cell can be operated for a long time.

As the demand for wearable devices increases, power sources that can operate stably despite mechanical deformation such as bending or bending are attracting attention. Accordingly, research is being actively conducted on paper-based electrochemical microfluidic fuel cells that have flexible properties, low cost, and high efficiency.

However, paper-based electrochemical microfluidic fuel cells have a short duration because they are manufactured based on paper, and there is a problem in that the flexibility of the hydrophobic region is reduced due to curing of the photoresist during the flow path manufacturing process through the exposure process. Additionally, in previous research, electrodes were attached using nanowires, wraps, etc., but this had the problem of increasing contact resistance and causing power loss.

A fuel cell was needed to solve the conventional problems of short duration, deterioration of flexible properties due to curing of the photoresist, and power loss.

Republic of Korea Patent No. 10-1877681 (“Flexible electrode, biofuel cell using the same, and manufacturing method thereof”, Korea University Industry-Academic Cooperation Foundation, 2018.07.05)

The technical problem to be achieved by the present invention is to solve this problem and relates to a fabric-based fluid fuel cell to improve performance so that the fuel cell can be operated for a long time.

The technical problems of the present invention are not limited to the problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

The fabric-based fluid fuel cell of the present invention includes a main body formed of fabric, a flow path formed in the main body and through which fluid flows, and a pair printed on the outer surface of the main body so that a portion is connected to the flow path. It is composed of an electrode part and a component that does not absorb fluid, and includes a coating part applied to the outer surface of the main body part to form the flow path part.

The electrode portion may include a first electrode portion printed on the upper surface of the main body portion and a second electrode portion printed on the lower surface of the main body portion.

The first electrode portion and the second electrode portion may be formed to be spaced apart by a preset distance.

The pair of electrode parts may be formed to overlap each other on different surfaces of the main body part.

The pair of electrode parts may be positioned in the main body to be symmetrical about the flow path part.

The coating part may include an acrylic component.

The coating may include at least one of polydimethylsiloxane (PDMS) or oiliness ink (Schmierfδhigkeitink).

The fabric-based fluid fuel cell manufacturing method of the present invention includes the steps of providing a fabric-based main body, printing a pair of electrode parts on the outer surface of the main body, and spraying a coating liquid on the outer surface of the main body to provide fluid. It includes the step of forming a flow passage part.

In the step of printing the electrode part, a first electrode part may be printed on the upper surface of the main body part, and a second electrode part may be printed on the lower surface of the main body part.

In the step of printing the electrode portion, the main body portion may be printed so that the first electrode portion and the second electrode portion have a preset gap.

In the step of printing the electrode portion, the pair of electrode portions may be printed so that they overlap on different surfaces of the main body portion.

In the step of printing the electrode portion, the pair of electrode portions may be printed so that they are symmetrical on different surfaces of the main body with the flow path portion as the center.

In the step of forming the flow path portion, the coating portion may include an acrylic component.

In the step of forming the flow path portion, the coating liquid may include at least one of dimethylsiloxane (polydimethylsiloxane, PDMS) or oiliness ink.

The fabric-based fluid fuel cell of the present invention can maintain flexible properties.

In addition, the fabric-based fluid fuel cell of the present invention has the characteristics of being environmentally friendly, capable of mass production during the product development process, and minimizing manufacturing costs.

In addition, the fabric-based fluid fuel cell of the present invention has the feature of reducing power loss and improving duration.

1 is a front view of a fabric-based fluid fuel cell according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the fabric-based fluid fuel cell of FIG. 1 cut along line AA.
Figure 3 is a front view of a fabric-based fluid fuel cell according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of the fabric-based fluid fuel cell of FIG. 3 cut along line AA.
Figure 5 is a diagram of a fabric-based fluid fuel cell according to another embodiment of the present invention.
Figure 6 is a flow chart of the fabric-based fluid fuel cell manufacturing method of the present invention.
FIG. 7 is a diagram to explain in more detail the printing of the electrode portion in FIG. 6.
FIG. 8 is a diagram to explain in more detail the formation of a flow path by spraying the coating liquid in FIG. 6.
FIG. 9 is a diagram for explaining an example of cutting a plurality of fluid fuel cells in FIG. 6.
Figure 10 is a graph showing OCV values over time according to fabric type.
Figure 11 is a graph showing the maximum current density value according to fabric type.
Figure 12 is a graph showing maximum power density values according to fabric type.
Figure 13 is a graph showing OCV values over time according to the shape of the electrode part.
Figure 14 is a linear-sweep measurement graph according to the shape of the electrode portion, and a graph showing the maximum power density and maximum current density.
Figure 15 is an EIS graph according to the shape of the electrode part.
Figure 16 is a graph showing OCV values over time according to acidic electrolyte and basic electrolyte.
Figure 17 is a linear-sweep measurement graph according to acid electrolyte, and a graph showing maximum power density and maximum current density.
Figure 18 is a linear-sweep measurement graph according to basic electrolyte, and a graph showing maximum power density and maximum current density.
Figure 19 is an EIS graph according to acid electrolyte and base electrolyte.
Figure 20 is a graph of the duration of the stop flow state.
Figure 21 is a graph of the duration of the Continuous Flow state.

Advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely intended to ensure that the disclosure of the present invention is complete and to those skilled in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the invention is merely defined by the claims. Like reference numerals refer to like elements throughout the specification.

The fabric-based fluid fuel cell (1) of the present invention is a flexible fuel cell that produces power using capillary action without an external power source. The fabric-based fluid fuel cell 1 has the advantage of maintaining the flexible nature of the microfluidic channel by using a waterproof spray instead of a photoresist when manufacturing a microfluidic channel through which fluid flows (the flow path 30 in FIG. 1).

In addition, the fabric-based fluid fuel cell (1) of the present invention is based on fabric and has a continuous flow type structure, so it is environmentally friendly and inexpensive to manufacture, and the short duration, which is a disadvantage of fluid fuel cells, is improved. There are possible features.

The fabric-based fluid fuel cell (1) of the present invention can reduce power loss due to electrode attachment in conventional microfluidic fuel cells by printing electrodes using a screen printing method, and can be mass-produced due to its single-layer manufacturing structure. The process has the advantage of being capable of mass production.

Hereinafter, the fabric-based fluid fuel cell and manufacturing method of the present invention will be described in more detail with reference to FIGS. 1 to 9.

With reference to FIGS. 1 and 2, a fabric-based fluid fuel cell according to an embodiment of the present invention will be described.

FIG. 1 is a front view of a fabric-based fluid fuel cell according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the fabric-based fluid fuel cell of FIG. 1 taken along line A-A.

The fabric-based fluid fuel cell 1 includes a main body 10, a pair of electrode parts 20 printed on different sides of the main body 10, and a fluid flowing through the main body 10. It includes a flow path portion 30 and a coating portion 40 that is composed of a component that does not absorb fluid and is applied to different surfaces of the main body portion 10 to form the flow path portion 30.

Hereinafter, each component will be described in detail.

The main body 10 forms the housing of the fabric-based fluid fuel cell 1 and may be made of a textile product (woven, knitted, non-woven, etc.) such as fabric capable of absorbing fluid through capillary action. For example, the main body 10 is made of Paper (Fiter paper Cat.1001-150, Whatman, 0.15mm, UK), Cotton (Sixty-naked cotton, 0.12mm, Chungage, Korea), Flannel (Cotton recruitment organization, 0.3 mm, 1000nara, Korea), Span blend (Span stretch, 0.3mm, Makefabric, Korea), Polyester blend (Prism stripe, 0.15mm, Decotop, Korea), etc. to form the substrate of the fabric-based fluid fuel cell (1). You can.

An electrode portion 20, a flow path portion 30, and a coating portion 40 may be formed in the body portion 10.

The electrode portion 20 forms the electrode of the fabric-based fluid fuel cell (1). The electrode unit 20 may be formed by printing an electrode solution (see 23 and 24 in FIG. 7B) in which a catalyst is mixed with a graphene mixture on different sides of the main body 10 using a screen printing method. The electrode unit 20 includes a first electrode unit 21 and a second electrode unit 22 formed on different upper and lower surfaces of the main body unit 10, respectively.

In this specification, 'upper surface' refers to a surface located on the upper side of the main body 10 based on the cross-sectional view of FIG. 2. In addition, 'lower surface' refers to the surface located below the main body 10 with respect to the main body 10 in FIG. 2.

The first electrode portion 21 and the second electrode portion 22 are the anode electrode (Anolyte) and the cathode electrode (Catholyte) of the fabric-based fluid fuel cell (1), and are at least partially connected to the flow path portion 30, which will be described later. Preferably, it can be printed on the upper and lower surfaces of the main body 10. At this time, the first electrode portion 21 and the second electrode portion 22 may not be formed to overlap the upper and lower surfaces of the main body portion 10 as shown in FIG. 2 but may be formed to be offset from each other. The first electrode portion 21 and the second electrode portion 22 may be formed to be symmetrical about the flow path portion 30, and when the main body portion 10 is folded along line B-B in FIG. 1, they will overlap each other. You can.

The first embodiment has been described as an example in which the first electrode portion 21 and the second electrode portion 22 are arranged on the upper and lower surfaces of the main body portion 10 so that they do not overlap but are offset from each other. However, the present invention is not limited to this, and the first electrode portion 21 and the second electrode portion 22 may be formed overlapping the upper and lower surfaces of the main body portion 10, and this will be described in detail in the second embodiment.

The first electrode portion 21 and the second electrode portion 22 may be printed on the upper and lower surfaces of the main body portion 10 to have a preset distance from each other. Here, the preset interval refers to the minimum interval at which the first electrode portion 21 and the second electrode portion 22 do not interfere with each other and generate resistance.

The fluid fuel cell in this specification uses a fabric-based main body 10 and has a slight thickness unlike paper, but has a first electrode part 21 printed on different sides of the main body 10 and a first electrode part 21 printed on different sides of the main body 10. By including the structure of the two electrode portion 22, the distance between the anode electrode and the cathode electrode can be minimized. In particular, the first electrode portion 21 and the second electrode portion 22 are printed on the upper and lower surfaces of the main body 10 to have a preset distance from each other, thereby avoiding the disadvantages caused by the thickness difference compared to the paper-based fluid fuel cell. It has the characteristic of being able to overcome small resistance and produce high power.

The first electrode unit 21 and the second electrode unit 22 are pre-manufactured OHP films (OHP film, Alpha, Korea) placed on the upper and lower surfaces of the main body 10, and electrode solutions 23 and 24 are placed on the OHP film. ) may be applied and formed on the main body 10. The first electrode unit 21 and the second electrode unit 22 are screen-printed on the main body 10 with pre-mixed electrode solutions 23 and 24 using OHP films whose upper and lower surfaces are laser cut in the shape of electrodes. It is formed through screen printing. Accordingly, the first electrode portion 21 and the second electrode portion 22 are formed by the main body portion (see 220 in FIG. 7B) and the anode electrode film (see 210 in FIG. 7B) pre-made of OHP film. 10) Can be printed at the exact location.

The electrode solutions 23 and 24 are mixed solutions composed of the components of the electrode unit 20, and can be manufactured by mixing a preset amount of catalyst per area of the electrode with graphene. For example, the electrode solutions 23 and 24 may be formed by mixing a catalyst with a graphene mixture (Water-Dispersible graphene paste (15 mg/mL), Mexplorer co. ltd, Korea).

The electrode solutions 23 and 24 are formed of catalysts corresponding to the anode electrode (Anolyte) and the cathode electrode (Catholyte), respectively. The electrode solutions 23 and 24 are formed by uniformly mixing a catalyst and an acid catalyst (Nafion solution (Nafion stock solution: Dupont, 5% (w/w) solution, USA)) with a graphene paste. The amount of catalyst and acid catalyst can be adjusted depending on the weight and area of the electrode unit 20. The electrode solutions 23 and 24 may contain 37 mg of catalyst and 37 ul of acid catalyst (nafion) per 1 g of graphene paste. The anode electrode solution 23 and the cathode electrode solution 24 containing catalysts are applied using a screen printing technique, and the applied electrode solutions 23 and 24 are heated to a high temperature in an oven to form the first electrode part 21 and the second electrode part 21. The electrode portion 22 may be formed.

A coating portion 40 may be formed at a location adjacent to the electrode portion 20.

The coating portion 40 is formed by spraying a coating liquid (see 41 in FIG. 8B) of a component that does not absorb fluid onto different surfaces of the main body portion 10. The coating liquid 41 may be made of Neverwet (Neverwet for fabric, Rust-Oleum, USA), which can prevent fluid penetration and penetration. The coating portion 40 is sprayed with the above-mentioned coating liquid 41 on the upper and lower surfaces of the main body 10 using a stencil technique, and dried at room temperature so that the sprayed coating liquid 41 can permeate into the main body 10. can be formed. Here, the coating portion 40 is sprayed on the upper and lower surfaces of the main body portion 10 except for the position of the electrode portion 20 and the position where the flow path portion 30 will be formed by the pre-manufactured flow path film (31 in FIG. 8b). This can create a hydrophobic region. As the coating portion 40 is formed, the flow path portion 30 may be formed in a location in the main body portion 10 where the electrode portion 20 and the coating portion 40 are not formed.

The flow path film 31 has through-holes formed in positions other than the positions where the electrode part 20 and the flow path part 30 are to be formed, and may be made of a type of filter paper. The flow path film 31 may be, for example, filter paper (Whatman, Cat No. 1, UK) with a diameter of 150 mm. In the flow path film 31, through-holes may be formed in positions other than the position of the electrode part 20 and the position where the flow path part 30 is to be formed by using a laser cutting machine using filter paper. When the flow path film 31 is placed on the upper and lower surfaces of the main body 10, the coating liquid 41 can permeate the main body 10 through the through hole. The coating portion 40 may be formed by spraying the coating liquid 41 on the main body using the flow path film 31, and may form a hydrophobic region of the main body 10. Flow passage portions 30 may be formed on the upper and lower surfaces of the main body portion where the coating liquid 41 is not sprayed, except for the electrode portion 20.

Meanwhile, the detailed chemical composition of the coating liquid 41 constituting the coating portion 40 may be comprised of proprietary acrylic or aliphatic petroleum distillates, polydimethylsiloxane (PDMS), or It may be replaced with oil-based ink (Schmierfδhigkeit ink).

The flow path portion 30 forms a flow path for fluids such as fuel and electrolyte flowing from one end of the main body portion 10. The flow path portion 30 may extend along one direction of the body portion 10 and may be formed on the body portion 10 by a coating portion 40 that is formed by spraying on the upper and lower surfaces of the body portion 10. . The flow path portion 30 creates an area through which fuel flows except for the coating portion 40 formed by permeating the coating liquid 41 into the body portion 10 and the electrode portion 20 printed on the body portion 10. can do.

The fluid flowing into the flow path portion 30 is absorbed into the fabric-based main body portion 10 and is absorbed and flows along the flow path by self-pumping by capillary action. Accordingly, the fabric-based fluid fuel cell of the present invention may not require a separate external pump.

Since the flow path portion 30 is not formed by etching or removing the photoresist, but is manufactured using a waterproof coating solution 41, all parts of the fabric-based fluid fuel cell 1 can be manufactured flexibly. .

As described above, the fabric-based fluid fuel cell 1 of the present invention can maintain flexible properties in all parts and can be efficiently used in laminar flow devices such as clothing, wearable electronic devices, and artificial muscle devices.

Figure 3 is a front view of a fabric-based fluid fuel cell according to a second embodiment of the present invention, and Figure 4 is a cross-sectional view of the fabric-based fluid fuel cell of Figure 3 taken along line A-A.

Hereinafter, a fabric-based fluid fuel cell according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

Referring to FIGS. 3 and 4, the fabric-based fluid fuel cell 1 according to the second embodiment of the present invention is the same as the first described above except for the position of the electrode portion 20a and the position where the coating portion 40a is formed. It is virtually the same as the embodiment. Accordingly, detailed descriptions related to the already described main body portion 10, flow path portion 30, etc. will be omitted.

The electrode portion 20 forms the electrode of the fabric-based fluid fuel cell 1 and includes a first electrode portion 21a and a second electrode portion 22a formed on different upper and lower surfaces of the main body 10, respectively. Includes.

The first electrode portion 21a and the second electrode portion 22a may be printed on the upper and lower surfaces of the main body portion 10, respectively, so that at least a portion of the first electrode portion 21a and the second electrode portion 22a are connected to the flow path portion 30. Unlike the first embodiment, the first electrode portion 21a and the second electrode portion 22a may be formed overlapping the upper and lower surfaces of the main body portion 10. Unlike the first embodiment, the first electrode portion 21a and the second electrode portion 22a may be formed to face the upper and lower surfaces of the main body portion 10. Here, the fact that the first electrode portion 21a and the second electrode portion 22a are formed overlapping may mean that they are formed on the same vertical line of the main body portion 10. That is, the first electrode portion 21a and the second electrode portion 22a are formed on the same vertical line and can be symmetrical about the main body portion 10. The first electrode portion 21a and the second electrode portion 22a are printed on different upper and lower surfaces, and are formed overlapping on the upper and lower surfaces with the main body 10 as the center, thereby minimizing the distance between the anode electrode and the cathode electrode. In addition, the first electrode portion 21a and the second electrode portion 22a are arranged to have a preset gap, that is, a minimum gap that does not interfere with each other and generate resistance, so that the resistance in the fabric-based main body 10 is small and It can produce high power.

As described above in the first embodiment, the first electrode portion 21a and the second electrode portion 22a are electrode solutions 23 and 24 mixed in advance using an OHP film whose upper and lower surfaces are laser cut into the shape of the electrode. This main body portion 10 may be screen printed.

Since the electrode solutions 23 and 24 comprised of the components of the electrode portion 20a are the same as the electrode solutions 23 and 24 in the first embodiment described above, detailed descriptions thereof will be omitted.

The coating portion 40a is applied to different surfaces of the main body 10 to form the flow path portion 30, and is a coating liquid 41 containing a component that prevents the intrusion and penetration of the fluid without absorbing the fluid. It can be formed by spraying. The coating portion 40a may be formed by spraying on the upper and lower surfaces of the main body portion 10 using a stencil technique. Since the position of the second electrode part 22a formed on the main body 10 of the coating part 40a according to the second embodiment is changed, the position at which the coating part 40a is sprayed on the main body 10 may be changed. Accordingly, the cross-sectional shape of the pre-manufactured flow path film 31 may be manufactured differently from the first embodiment, but the main body portion 10 excluding the position of the electrode portion 20a and the position where the flow path portion 30 is to be formed It is manufactured in a form that allows the coating liquid 41 to be sprayed on the upper and lower surfaces of the. That is, the passage portion film 31 has through-holes formed at locations other than the location where the passage portion 30 is to be formed and the location of the electrode portion 20a. The coating portion 40a may include a hydrophobic region formed when the coating liquid 41 sprayed through the through hole of the flow path film 31 permeates the main body portion 10. The flow path portion 30 may be formed in a portion of the flow path film 31 that is not sprayed, excluding the through hole and the electrode portion 20a.

Since the components constituting the coating portion 40 are the same as in one embodiment, detailed description thereof will be omitted.

FIG. 5A is a front view of a fabric-based fluid fuel cell according to a third embodiment of the present invention, FIG. 5B is a cross-sectional view of the fabric-based fluid fuel cell of FIG. 5A taken along line a-a, and FIG. 5C is a front view of a fabric-based fluid fuel cell according to a fourth embodiment of the present invention. This is a front view of the fabric-based fluid fuel cell, and FIG. 5D is an enlarged view of part C of FIG. 5C.

Hereinafter, a fabric-based fluid fuel cell according to another embodiment of the present invention will be described with reference to FIGS. 5A to 5D.

Referring to FIG. 5, the fabric-based fluid fuel cell 1 according to another embodiment of the present invention is similar to the previously described embodiment except for the shape and position of the electrode portion 20b and the location where the coating portion 40b is formed. They are virtually identical. Accordingly, detailed descriptions related to the already described main body portion 10, flow path portion 30, etc. will be omitted.

Referring to FIGS. 5A and 5B, the electrode portion 20b of the fabric-based fluid fuel cell 1 according to the third embodiment includes the first electrode portion 21b and the first electrode portion 21b formed on the same surface of the main body 10. It includes two electrode portions 22b.

The first electrode portion 21b and the second electrode portion 22b are formed to be at least partially connected to the flow path portion 30, but, unlike in one embodiment, may be printed on the same side of the main body portion 10. . The first electrode portion 21b and the second electrode portion 22b may be formed on the same plane and may be symmetrical about the flow path portion 30. Even if the first electrode portion 21b and the second electrode portion 22b are formed on the same surface, they can be arranged to have a minimum gap that does not interfere with each other and cause resistance.

As described above in one embodiment, the first electrode portion 21b and the second electrode portion 22b are made of electrode solutions 23 and 24 mixed in advance using an OHP film whose upper and lower surfaces are laser cut into the shape of the electrode. The main body 10 may be screen printed.

In addition, since the electrode solutions 23 and 24 comprised of the components of the electrode portion 20b are the same as the electrode solutions 23 and 24 in the previously described embodiment, detailed descriptions thereof will be omitted.

The coating portion 40b is sprayed on the upper surface of the main body 10 to form the flow path portion 30, and contains a coating liquid 41 containing a component that does not absorb fluid and prevents the intrusion and penetration of fluid. It can be formed by spraying. The pre-manufactured flow path film 31 may have through-holes formed in positions other than the position where the pair of electrode parts 20b and the flow path 30 are formed. Accordingly, the coating portion 40b according to the third embodiment uses the passage portion film 31 to form a pair of electrode portions 20b and the main body portion 10 excluding the position where the passage portion 30 is formed. It may include a hydrophobic region formed by spraying the coating liquid 41 on the upper surface. A pair of electrode parts 20b is formed on the upper surface of the main body 10, but is not formed on the lower surface. Accordingly, the coating portion 40b may be formed by spraying the coating liquid 41 on the entire lower surface of the main body portion 10.

Since the components constituting the coating portion 40b are the same as in one embodiment, detailed description thereof will be omitted.

Referring to FIGS. 5C and 5D, the electrode portion 20c of the fabric-based fluid fuel cell 1 according to the fourth embodiment is formed in a blade shape and is a first electrode portion formed on the same side of the main body 10. (21c) and a second electrode portion (22c).

The first electrode portion 21c and the second electrode portion 22c are formed differently from the shape of the electrode portion 20 of the first to third embodiments described above. The first electrode portion 21c and the second electrode portion 22c are characterized in that they are formed in a blade shape. Here, the blade shape refers to the shape of the first electrode portion 21c and the second electrode portion 22c shown enlarged in FIG. 5C. As the first electrode portion 21c and the second electrode portion 22c are formed in a blade-like sawtooth shape, the shape of the flow path portion 30 can be designed differently, and the fluid flowing into the flow path portion 30 flows. paths may increase.

The first electrode portion 21c and the second electrode portion 22c are formed by screen printing the premixed electrode solutions 23 and 24 on the main body 10 using an OHP film whose upper and lower surfaces are laser cut into a blade shape. It can be formed by printing. Since the electrode solutions 23 and 24 comprised of the components of the electrode portion 20c are the same as the electrode solutions 23 and 24 in the previously described embodiment, detailed descriptions thereof will be omitted.

The coating portion 40c is sprayed on different surfaces of the main body 10 to form the flow path portion 30, and the coating liquid 41 contains a component that prevents fluid from being absorbed and prevents fluid from entering and passing through. ) can be formed by spraying on the main body 10. The pre-manufactured flow path film 31 may include through-holes in positions other than the position where the pair of electrode parts 20c and the flow path part 30c are formed. Accordingly, in the coating portion 40c according to the fourth embodiment, the coating liquid 41 is sprayed on the upper surface of the main body 10 except for the position where the pair of electrode portions 20c and the flow path portion 30c are formed. can be formed. A pair of electrode parts 20c is formed on the upper surface of the main body 10, but is not formed on the lower surface. Accordingly, the coating portion 40c may be formed by spraying the coating liquid 41 on the entire lower surface of the main body portion 10.

Since the components constituting the coating portion 40c are the same as in one embodiment, detailed description thereof will be omitted.

FIG. 6 is a flowchart of the fabric-based fluid fuel cell manufacturing method of the present invention, FIG. 7 is a diagram for explaining in more detail the printing of the electrode portion in FIG. 6, and FIG. 8 is a flowchart of the fabric-based fluid fuel cell manufacturing method in FIG. 6. FIG. This is a drawing to explain forming a flow path in more detail, and FIG. 9 is a drawing to explain an example of cutting a plurality of fluid fuel cells in FIG. 6.

Hereinafter, with reference to FIGS. 6 to 9, the fabric-based fluid fuel cell manufacturing method of the present invention will be described in detail.

In the present invention, a plurality of fabric-based fluid fuel cells 1 can be manufactured separately, but a plurality of electrode parts 20, flow path parts 30, and coating parts 40 are printed and By coating and cutting the body portion 10, multiple fabric-based fluid fuel cells 1 can be manufactured at a time. The fabric-based fluid fuel cell manufacturing method will be described later based on manufacturing a plurality of fabric-based fluid fuel cells (1) in a single process.

Referring to FIG. 6, in order to manufacture the fabric-based fluid fuel cell 1 of the present invention, a main body (made of a textile product such as fabric (woven, knitted fabric, non-woven fabric, etc.) capable of absorbing fluid through capillary phenomenon) is used. 10) Prepare (S100). Here, the main body 10 is made of Paper (Fiter paper Cat.1001-150, Whatman, 0.15mm, UK), Cotton (Sixty-naked cotton, 0.12mm, Chungage, Korea), Flannel (Cotton recruitment organization, 0.3mm, 1000nara) , Korea), Span blend (Span stretch, 0.3mm, Makefabric, Korea), Polyester blend (Prism stripe, 0.15mm, Decotop, Korea), etc. can form the substrate of the fabric-based fluid fuel cell (1).

After preparing the main body 10, electrode parts 20 are printed on different sides of the main body 10 (S200). Regarding printing the electrode portion 20, it will be described in more detail with reference to FIG. 7.

Referring to FIGS. 6 and 7 , prior to printing the electrode portion 20 on the main body 10, the electrode solution to be printed on the electrode portion 20 is mixed (S210). The electrode solution can be formed by mixing a catalyst and graphene paste. The amount of catalyst in the electrode solution can be adjusted depending on the weight of the first electrode unit 21 and the second electrode unit 22. Additionally, the ratio of catalyst to acid catalyst in the electrode solution may be determined depending on the area of the first electrode portion 21 and the second electrode portion 22 corresponding to the anode electrode and the cathode electrode. The electrode solution can be formed by uniformly mixing a catalyst and an acid catalyst (Nafion solution (Nafion stock solution: Dupont, 5% (w/w) solution, USA) at a ratio of 2 mg/cm2 and 0.1 mg/cm2. The electrode solution is Add 37mg of catalyst and 37ul of nafion per 1g and mix.

After mixing the electrode solution, a positive electrode film 210 is prepared on the upper surface of the main body 10 (S220). The anode electrode film 210 is a pre-manufactured OHP film, and can be formed by laser cutting into the shape of the first electrode part 21 to manufacture the first electrode part 21. Additionally, the anode electrode film 220 can be prepared simultaneously with the anode electrode film 210. The anode electrode film 220, like the anode electrode film 210, is a pre-manufactured OHP film, and can be formed by laser cutting into the shape of the second electrode part 22 to manufacture the second electrode part 22. . When manufacturing the anode electrode film 210 and the anode electrode film 220, the laser cutting machine setting conditions may be set to Power [W] -7, Speed [cm/s] -2.1, and Frequency [Hz] -2000.

When the anode electrode film 210 is prepared (S220), the anode electrode film 210 is placed on the upper surface of the main body 10, and then the anode electrode solution 23 is printed on the upper surface of the main body 10 (S230). )do. At this time, because the fabric-based main body 10 has elasticity unlike paper, the anode electrode film 210 can be temporarily fixed to the upper surface of the main body 10 by spraying a temporary fixative (75 Graphic Art, 3M) on the positive electrode film 210. there is. After temporarily fixing the anode electrode film 210 to the upper surface of the main body 10, the anode electrode solution 23 is placed on a portion of the anode electrode film 210. When the anode electrode solution 23 is pushed uniformly through the film applicator 25, the anode electrode solution 23 will be printed (S230) on the upper surface of the main body 10 through the through hole of the anode electrode film 210. You can.

After printing the anode electrode solution 23 (S230), the anode electrode film 210 temporarily fixed to the main body 10 is detached and the anode electrode film 220 is prepared (S240) to form the anode electrode film 210 of the main body 10. The cathode electrode solution 24 is printed on the lower surface (S250).

In the same manner as the method of printing the anode electrode solution 23, a positive electrode film 220 is prepared (S240) and the cathode electrode solution 24 is printed (S250). After temporarily fixing the anode electrode film 220 to the lower surface of the main body 10 by spraying a temporary fixing spray on the anode electrode film 220, the cathode electrode solution 24 is placed on a portion of the anode electrode film 220. Let go. By uniformly pushing the cathode electrode solution 24 using the film applicator 25, the cathode electrode solution 24 can be printed on the lower surface of the main body 10 through the through hole of the anode electrode film 220. . After the cathode electrode solution 24 is printed, the anode electrode film 220 temporarily fixed to the main body 10 is detached.

The main body 10 is heated in an oven at 120° C. for 60 minutes (S260) to ensure adhesion between the anode electrode solution 23 and the cathode electrode solution 24.

After the electrode portion 20 is printed on the main body 10, the coating liquid 41 is sprayed on the main body 10 (S300) to form the coating portion 40 and the flow path portion 30 (S400). Spraying the coating liquid 41 (S300) and forming the flow path 30 (S400) will be described in more detail with reference to FIG. 8.

Referring to FIG. 8, after printing the electrode unit 20 on the main body 10 (S200), the coating liquid 41 is sprayed on the main body 10 (S300).

Before spraying the coating liquid 41 on the main body 10, a flow path film 31 is prepared on the upper surface of the main body 10 (S310). The flow path film 31 is based on filter paper (Whatman, Cat No. 1, UK) with a diameter of 150 mm. The position where the electrode part 20 and the flow path part 30 will be formed is cut using a laser cutting machine. It is manufactured by drilling holes in the remaining positions. The channel film 31 may be manufactured in a form of six connected pieces in order to manufacture six fabric-based fluid fuel cells 1 at a time. The anode electrode film 210 and the anode electrode film 220 described above can also be manufactured in a connected form in order to manufacture six fabric-based fluid fuel cells 1 at a time.

The manufactured flow path film 31 is provided on the upper surface of the main body 10 (S310). The coating liquid 41 is sprayed on the upper surface of the flow path film 31 at a distance of about 20 to 25 cm from the upper surface of the main body 10 where the flow path film 31 is placed (S320). At this time, in order to prevent the coating solution 41 from spreading in the position where the flow path 30 is to be formed, a temporary fixative is applied to the flow path film 31 to adhere it to the main body 10 as closely as possible. However, in order to prevent the electrode portion 20 from being separated from the main body 10 by the temporary fixative, the flow path film 31 is placed only slightly on the electrode portion 20.

After the coating liquid 41 is sprayed, the main body 10 is dried at room temperature for 30 minutes so that the coating liquid 41 can permeate into the main body 10 through the perforated portion of the flow path film 31. The coating liquid 41 penetrates into the fabric through the pores of the flow path film 31 and forms a coating portion 40 in the hydrophobic region.

Meanwhile, the coating liquid 41 does not penetrate to the lower surface of the main body 10. Accordingly, the main body 10 is turned over and the process of spraying and drying the coating liquid 41 on the lower surface of the main body 10 is repeated. The coating liquid 41 permeates the fabric through the pores of the flow path film 31 to form the coating portion 40 in the hydrophobic region.

As shown in FIG. 9, a plurality of fabric-based fluid fuel cells 1 manufactured through the above-described manufacturing method are formed in one main body 10. Accordingly, the plurality of connected fluid fuel cells shown in the drawing are cut along the dotted line (S500) to form a fabric-based fluid fuel cell (1).

Figure 10 is a graph showing the OCV value over time according to the fabric type, Figure 11 is a graph showing the maximum current density value according to the fabric type, and Figure 12 is a graph showing the maximum power density value according to the fabric type.

Hereinafter, the test results for selecting the fabric type will be described in detail with reference to FIGS. 10 to 12.

The five materials described above in Figure 1 (Paper (Fiter paper Cat.1001-150, Whatman, 0.15mm, UK), Cotton (Sixty-naked cotton, 0.12mm, Chungage, Korea), Flannel (Cotton recruitment organization, 0.3mm , 1000nara, Korea), Span blend (Span stretch, 0.3mm, Makefabric, Korea), and the main body (10) of Polyester blend (Prism stripe, 0.15mm, Decotop, Korea) to produce a fabric-based fluid fuel cell (1). Afterwards, OCV (Open Circuit Voltage), Linear Sweep Voltammetry, and EIS were measured to measure and compare the performance of each fabric material. The fuel and electrolyte used in the experiment were a combination of H2O2 and HCl, and the electrode was used. The process proceeded to the electrode part 20b of the third example.

Looking at the speed according to the type of fabric, because the material and thickness of the fabric used are different, the time it takes for the fuel and electrolyte to meet and flow to the end is different. As a result of the experiment, the speed according to the type of fabric was 0.45±0.02 for paper, 0.45±0.04 mm ² /s for cotton, 0.194±0.008 mm ² /s for flannel, 3.23±0.15 mm ² /s for span blend, and 0.13 for polyester blend. It was measured as ±0.00 mm ² /s 6. The Span Blend base was measured at the fastest speed at 3.23mm2/s.

Looking at the OCV by time according to the type of fabric with reference to Figure 10, in order to accurately measure the efficiency of the fuel cell, the OCV value is measured every 10 seconds after the electrode applied to the flow path is sufficiently wet, and the time at which a stable section appears is Measurements such as linear sweep were carried out. As a result of the experiment, the OCV value over time according to the type of fabric was 0.695±0.041V for Paper, 0.802±0.071V for Cotton, 0.534±0.027V for Flannel, 0.392±0.027V for Polyester, and 0.454±0.039V for Blend Span Blend. It was measured. The OCV value over time according to fabric type was measured to be the highest at 0.821v when the fabric was cotton.

Looking at the maximum current density and maximum power density according to the type of fabric, the maximum power density and maximum current density for each fabric were measured using the linear sweep voltammetry method at the point where the OCV value was stabilized, and the measured values can be shown in Table 1. .

Paper Cotton Flannel Polyester Blend Span Blend OCV
[V] 0.666
±0.001 0.743
±0.001 0.888
±0.001 0.645
±0.004 0.352
±0.004 Max. Current density
[mA/ ^cm2 ] 3.32
±0.11 1.09
±0.14 2.39
±0.15 0.053
±0.002 1.85
±0.12 Max. Power density [mW/cm ² ] 0.496
±0.053 0.181
±0.024 0.547
±0.062 0.007
±0.0009 0.159
±0.057

The maximum current density and maximum power density will be explained with reference to FIGS. 11 and 12. In the OCV value, Flannel was measured the highest at 0.888V, and in the maximum current density value, Flannel was measured the highest at 2.39mA/cm2, excluding paper. In the maximum power density value, Flannel was measured the highest at 0.547mW/cm2. Measurement has been made.

Looking at the characteristics of each fabric, the material and thickness are composed of different materials, so when the material is 100% cotton, the performance is measured as good, and when the thickness is 0.3mm, the performance is measured as high. These two variables affect the performance. judge.

Based on these results, subsequent experiments set the basis for the microfluidic fuel cell to be flannel material.

Figure 13 is a graph showing the OCV value over time according to the shape of the electrode part, Figure 14a is a linear-sweep measurement graph according to the shape of the electrode part, and Figure 14b is a graph showing the maximum power density and maximum current density according to the shape of the electrode part. , and Figure 15 is an EIS graph according to the shape of the electrode part.

Hereinafter, fuel cell performance according to the electrode portion will be described in detail with reference to FIGS. 13 and 15.

Linear-sweep voltammetry and EIS measurements were performed to compare the performance of fuel cells according to the shapes of the electrode portions 20, 20a, 20b, and 20c of the first to fourth embodiments. In order to reliably measure the efficiency of the fuel cell for each electrode shape, the OCV value was measured every 10 seconds after wetting all parts where fuel was present, and linear sweep voltammetry and EIS measurements were started at the part where the OCV was stabilized.

Looking at the COV values over time according to the shape of the electrode portion with reference to FIG. 13, the electrode portion 20 of the first embodiment is 0.543 ± 0.019V, the electrode portion 20a of the second embodiment is 0.604 ± 0.059V, and the electrode portion 20 of the third embodiment is 0.604 ± 0.059V. The electrode portion 20b was measured at 0.534±0.027V, and the electrode portion 20c of the fourth example was measured at 0.505±0.041V. Here, the electrode portion 20c in the fourth embodiment showed the highest OCV value of 0.575V. After about 5 minutes, the OCV values gradually progressed and stabilized. After that, linear sweep voltammetry and EIS were measured to measure the performance of the fuel cell.

In order to determine the performance of the fuel cell by measuring Linear Sweep Voltammetry in the area where the OCV value was stabilized, the maximum power density and maximum current density of the fuel cell were measured according to each electrode shape. The measured values are shown in Table 2. You can.

Basic Blade D.side basic D. side center OCV
[V] 0.888
±0.001 0.852
±0.007 0.921
±0.011 0.678
±0.003 Max. Current density [mA/cm ² ] 2.39
±0.15 1.96
±0.11 1.74
±0.09 1.71
±0.04 Max. Power density [mW/cm ² ] 0.547
±0.062 0.416
±0.032 0.401
±0.045 0.298
±0.047

Looking at the maximum current density and maximum power density according to the shape of the electrode part with reference to FIG. 14, the OCV value was measured to be the highest at 0.921V in the shape of the electrode part 20 of the first embodiment. However, the maximum power density and maximum current density, which are important in fuel cell efficiency, were measured as high as 0.547 mW/cm2 and 2.39 mA/cm2, respectively, for the fuel cell with the electrode portion 20b shape of the third example. The highest efficiency was measured in the shape of the electrode portion 20b of the third example.

In theory, the closer the distance between electrodes, the better the efficiency of the fuel cell. However, in the second embodiment with the closest distance, the lowest efficiency was measured. The reason is that the distance between electrodes was placed very close compared to other cases, so interference between electrodes occurred, interfering with power generation, resulting in power loss. It is believed that this has appeared. Accordingly, in the fabric-based fluid fuel cell 1 of the present invention, a pair of electrode parts 20 disposed on different sides are arranged to have a minimum gap that does not interfere with each other and generate resistance.

Referring to Figure 15, the internal resistance measured by the EIS measurement method according to the shape of the electrode part can be shown as Table 3.

Basic Blade D.Side Basic D.Side Center Ohmic resistance
[Ω]( _RΩ ) 316.32
±81.14 495.89
±92.71 385.28
±31.47 932.65
±51.71 Anode resistance[Ω](R _CT ) 854.08
±254.24 537.79
±141.75 752.83
±124.17 1395.74
±347.09 R _Ω + R _{C T} 1170.4 ±154.1 1033.68 ±103.14 1138.11 ±109.21 2328.39 ±331.27

Looking at the internal resistance values according to the shape of the electrode part, the shape of the electrode part 20b according to the third embodiment has the lowest internal resistance value of 316.32Ω. Because the third embodiment has a small resistance value, it produces higher power than fuel cells of other electrode shapes. On the other hand, in the shape of the electrode portion 20a according to the second embodiment, the internal resistance has the highest value of 932.65Ω. In the second embodiment, the spacing between electrodes was set too close, so it is judged that the resistance increased due to interference between electrodes. Figures 16a and 16b are graphs showing OCV values over time according to acidic electrolyte and basic electrolyte; Figures 17a and 17b are graphs showing linear-sweep measurement graphs and maximum power density and maximum current density according to acidic electrolyte, and Figures 18a and 18b are graphs showing linear-sweep measurement graphs and maximum power density and maximum current according to basic electrolyte. It is a graph showing density, and Figures 19a and 19b are EIS graphs according to acidic electrolyte and basic electrolyte.

Hereinafter, performance according to fuel and electrolyte will be described in detail with reference to FIGS. 16 to 19.

In addition to the combination of hydrogen peroxide and hydrochloric acid used in the previous experiment, the performance of the microfluidic fuel cell was compared and measured by using different fuels and electrolytes based on previous research. Acidic electrolyte and basic electrolyte were combined in the fuel. Combinations between fuel and electrolyte may be as shown in Table 4.

fuel electrolyte H ₂ O ₂ HCl H ₂ O _{2 H2SO4 ​} HCOOH KCOOH CH ₃ OH H ₂ O ₂ NaOH HCOOH KCOOH KOH CH ₃ OH

Linear-sweep voltammetry and EIS measurements were conducted to measure the performance of the fuel cell according to the combination of fuel and electrolyte. In order to reliably measure the efficiency of the microfluidic fuel cell for each fuel and electrolyte, all parts where fuel was wet were wetted. Afterwards, the OCV value was measured every 10 seconds. Linear sweep voltammetry and EIS measurements were started in the area where OCV was stabilized.

Looking at the OCV values over time for each combination of fuel and electrolyte with reference to Figure 16, the OCV values over time for each combination of fuel and acidic electrolyte are 0.534±0.027V for H2O2+HCl, 0.474±0.031V for H2O2+H2SO4, and HCOOH. +H2SO4 was measured at 0.283±0.015V, KCOOH+H2SO4 at 0.397±0.029V, and CH3OH+H2SO4 at 0.254±0.018V.

In addition, the OCV value over time according to the combination of fuel and basic electrolyte is 0.474±0.037V for H2O2+NaOH, 0.265±0.017V for HCOOH+NaOH, 0.0397±0.0035V for KCOOH+KOH, and 0.0287±0.0017 for CH3OH+KOH. was measured.

Among the 9 combinations, the OCV value of the previously used combination of hydrogen peroxide and hydrochloric acid was measured to be the highest at 0.575V. In general, solutions using acidic electrolytes were measured higher than those using basic electrolytes.

In order to measure the performance of the fuel cell according to the fuel and electrolyte, the maximum current density and maximum power density were measured using Linear-sweep Voltammetry in the area where the OCV value was stabilized. Table 5 is a table showing fuel cell performance according to the combination of fuel and acidic electrolyte, and Table 6 is a table showing fuel cell performance according to the combination of fuel and basic electrolyte.

H ₂ O ₂ +HCl H ₂ O ₂ +H ₂ SO ₄ HCOOH+H ₂ SO ₄ KCOOH+H ₂ SO ₄ CH ₃ OH+H ₂ SO ₄ OCV
[V] 0.888
±0.001 0.741
±0.002 0.428
±0.004 0.471
±0.003 0.634
±0.002 Max. Current density
[mA/ ^cm2 ] 2.39
±0.15 1.12
±0.12 1.87
±0.09 1.42
±0.18 3.05
±0.38 Max. Power density [mW/cm ² ] 0.547
±0.062 0.212
±0.015 0.226
±0.046 0.168
±0.014 0.484
±0.055 pH 1.14 1.41 2.1 1.35 2.1

H ₂ O ₂ +NaOH HCOOH+NaOH KCOOH+KOH CH ₃ OH+KOH OCV
[V] 0.351
±0.009 0.537
±0.004 0.101
±0.002 0.061
±0.001 Max. Current density
[mA/ ^cm2 ] 0.156
±0.024 0.335
±0.015 0.225
±0.11 0.03
±0.003 Max. Power density
[mW/cm ² ] 0.013
±0.002 0.045
±0.0049 0.0067
±0.001 0.00041
±0.00001 pH 12.3 3.4 14 14

Looking at the maximum current density and maximum power density according to fuel and electrolyte with reference to Figures 17 and 18, the maximum power density was measured to be the highest in the combination of hydrogen peroxide and hydrochloric acid at 0.888V, 0.547mW/cm2, and the maximum current density was The highest value was measured at 3.05 mA/cm2 in the combination of methanol and sulfuric acid.

When comparing the group using acidic electrolyte and the group using basic electrolyte, the performance of the combination using basic electrolyte was significantly lower than that of the group using acidic electrolyte. The reason is that the performance of fuel cells is correlated with pH. pH was measured by immersing the reaction part in fuel using a meter (pH testr 30, Eutech, Singapore). When using an acidic medium, the oxygen saturation concentration is 25% higher than when using a basic medium, so it is believed that acidic media performs better than basic media.

In the group using basic electrolyte, the combination of formic acid and sodium hydroxide measured the highest OCV, maximum current density, and maximum power density of 0.537V, 0.335mA/cm2, and 0.045mW/cm2, respectively, which are also related to pH. . This combination has a pH value of 3.4 and is acidic, but the remaining three combinations have a basic pH value of 12 to 14, so it is judged that the oxygen saturation using formic acid showed the best performance.

When comparing fuels in the group using acid electrolyte, the maximum power density was high in the order of hydrogen peroxide, methanol, formic acid, and potassium formate, indicating good performance. Oxidation kinetics of the electrode catalysts used for each fuel were affected. Therefore, it was judged that the hydrogen peroxide reactant using Al had high performance.

Referring to Figure 19, looking at the internal resistance graph measured by the EIS measurement method according to fuel and electrolyte, in the group combining fuel and acid electrolyte, the combination of hydrogen peroxide and hydrochloric acid was measured as the lowest resistance at 316.32Ω. Additionally, in the group using fuel and basic electrolyte, the combination of potassium formate and potassium hydroxide measured the lowest resistance at 240.17Ω.

Figure 20 is a graph of the duration of the stop flow state of the fuel cell, and Figure 21 is a graph of the duration of the continuous flow state of the fuel cell.

Hereinafter, with reference to FIGS. 20 and 21, the performance duration measured by comparing the fabric-based microfluidic fuel cell using a combination of electrolytes that showed good performance for each fuel in the above-described experiment and the conventional paper-based microfluidic fuel cell is compared. Let me explain. The performance duration of the fabric-based fluid fuel cell (1) and the paper-based fluid fuel cell is measured in Continuous Flow and Stop Flow states. Continuous Flow was measured using Chronopotentiometry, and the applied current value was 2.2mA (10mA/cm2). Stop Flow was measured using Chronoamperometry, and the set applied voltage value was half of OCV.

Table 7 and Table 8 show the Chronopotentiometry setting conditions and Chronoamperometry setting conditions.

Item Value Current [mA] 2.2 Interval time [s] 300 Current Range [mA] One Potential Range[V] 10

Item Value

Voltage [V] 0.333
0.445
0.214
0.236
0.317 Interval time [s] 60 Current Range [mA] One

Looking at the duration of the stop flow state using the chronoamperometry measurement method with reference to FIG. 20, the amount of fuel used, measured after the electrodes were fully wet, was 0.039ml. The experiment was carried out from the point where the measurement ended until the time when the current value reached ‘0’. The duration of the stop flow state is 25 ± 1.5 min for Paper (H2O2 + HCl), 90 ± 2.5 min for Fabric (H2O2 + HCl), 72 ± 3.5 min for Fabric (HCOOH + H2SO4), and 72 ± 3.5 min for Fabric (KCOOH + H2SO4). Measured at 48±2.0min, Fabric (CH3OH+H2SO4) is measured at 89±1.5min. As a result of the measurement, the fabric-based fluid fuel cell (1) using H2O2 fuel was measured to have the highest duration of 90 minutes, and the paper-based fluid fuel cell measured as a comparison group was measured to have a duration of 25 minutes. It can be seen that when it is based on fabric, the duration increases significantly compared to when it is based on paper.

Referring to Figure 21, looking at the duration of the continuous flow state using the chronopotentiometry measurement method, paper (H2O2 + HCl) was 77 ± 8 min, and fabric (H2O2 + HCl) was 600 ± 21 min. Fabric (HCOOH + H2SO4) is measured as 220 ± 17 min, Fabric (KCOOH + H2SO4) 205 ± 16 min, Fabric (CH3OH + H2SO4) 185 ± 21 min. The duration of the continuous flow state was measured to be the highest for the fabric fluid fuel cell using H2O2 fuel at 10 hours. The experiment was conducted until the measured voltage value reached half of the initial voltage value, and the fabric-based one had a longer duration than the paper-based one. It is believed that fabric is more durable than paper, so it generates power for a longer period of time.

As a result of the experiment, the fuel cell using H2O2 as fuel measured the highest. Accordingly, as shown in Table 9, the fabric-based fluid fuel cell (1) was compared with previous studies using H2O2 as fuel. Although the fabric-based fluid fuel cell (1) measured the lowest maximum power density and maximum current density compared to previous studies, it can be seen that it has a much better duration.

turn thesis Fuel/oxidizer electrode power density
(mW/cm ² ) current density
(mA/cm ² ) duration
(Min) [5] Paper-based membraneless hydrogen peroxide fuel cell prepared by micro-fabrication 1M H ₂ O ₂ +0.1MHCl Carbon 0.81 5.3 50
(Stop flow) [6] A Paper-Based Microfluidic Fuel Cell with Hydrogen Peroxide as Fuel and Oxidant 2M H ₂ O ₂ +1.5MH ₂ SO ₄ CNTs 0.88 10.3 3
(Continuous flow) [7] An improved alkaline direct formate paper microfluidic fuel cell 7.3MH ₂ O ₂ , 5M KCOOH Carbon 2.53 11.5 - Main study 1M H ₂ O ₂ +0.5MHCl Graphene Paste 0.547 2.37 600
(Continuous flow)

When comparing with the fabric-based fluid fuel cell (1) with reference to Table 10, number 4 is an electrochemical fuel cell and the rest are microbio fuel cells. The fabric-based fluid fuel cell (1) of the present invention has better performance and duration than the micro bio fuel cell, and when compared to previous studies, the performance was not good, but it showed better performance in terms of duration.

turn thesis Fuel/oxidizer electrode power density
(mW/cm ² ) current density
(mA/cm ² ) duration
(Min) [4] , Fabric-based alkaline direct formate microfluidic fuel cells
7.3MH ₂ O ₂
5M KCOOH Carbon 1.67 7.86 240
(Continuous flow) [14] Flexible and Stretchable Biobatteries: Monolithic Integration of Membrane-Free Microbial Fuel Cells in a Single Textile Layer - PEDOT:PSS 0.0064 0.052 - [15] Wearable textile-based glucose fyel cell using moisture management fabrics for improved & long-term power generation Glucose in PBS Carbon 0.017 0.23 200(Continuous flow) Main study 1M H ₂ O ₂ +0.5MHCl Graphene Paste 0.547 2.37 600

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will recognize that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will understand. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

1, 1a, 1b, 1c: Fabric-based fluid fuel cell
10: main body
20, 20a, 20b, 20c: electrode part
21, 21a, 21b, 21c: first electrode portion
22, 22a, 22b, 22c: second electrode portion
23: Anode electrode solution
24: cathode electrode solution
25: Film applicator
30, 30c: Eurobu
31: Eurobu Film
40, 40a, 40b 40c: Coating part
41: coating liquid

Claims (14)

A main body formed of fabric;
A flow path portion formed in the main body through which fluid flows;
a pair of electrode parts formed in the form of sawtooth blades and printed on the main body so that a portion is connected to the flow path part; and
A coating portion composed of a component that does not absorb fluid and applied to the outer surface of the main body portion to form the flow path portion;
A fabric-based fluid fuel cell comprising a. According to paragraph 1,
The electrode unit is a fabric-based fluid fuel cell including a first electrode unit printed on the upper surface of the main body unit and a second electrode unit printed on the lower surface of the main body unit. According to paragraph 2,
A fabric-based fluid fuel cell in which the first electrode portion and the second electrode portion are formed spaced apart by a preset distance. According to paragraph 1,
A fabric-based fluid fuel cell, characterized in that the pair of electrode parts are formed to overlap each other on different surfaces of the main body part. According to paragraph 1,
A fabric-based fluid fuel cell in which the pair of electrode parts are positioned in the main body to be symmetrical about the flow path part. According to paragraph 1,
The coating portion is a fabric-based fluid fuel cell containing an acrylic component. According to paragraph 1,
A fabric-based fluid fuel cell wherein the coating portion includes at least one of polydimethylsiloxane (PDMS) or oiliness ink (Schmierfδhigkeit ink). Preparing a fabric-based main body;
Printing a pair of electrode parts formed in the shape of a sawtooth blade on the main body; and
Spraying a coating liquid on the outer surface of the main body to form a flow path through which fluid flows;
Fabric-based fluid fuel cell manufacturing method comprising. According to clause 8,
The step of printing the electrode part is,
A fabric-based fluid fuel cell manufacturing method in which a first electrode part is printed on the upper surface of the main body part and a second electrode part is printed on the lower surface of the main body part. According to clause 9,
The step of printing the electrode part is,
A fabric-based fluid fuel cell manufacturing method for printing the main body portion so that the first electrode portion and the second electrode portion have a preset gap. According to clause 8,
The step of printing the electrode part is,
A fabric-based fluid fuel cell manufacturing method in which the pair of electrode parts are printed so that they overlap on different sides of the main body. According to clause 8,
The step of printing the electrode part is,
A fabric-based fluid fuel cell manufacturing method in which the pair of electrode parts are printed symmetrically on different surfaces of the main body with respect to the flow path part. According to clause 8,
In the step of forming the flow path portion,
A fabric-based fluid fuel cell manufacturing method, characterized in that the flow path portion through which the fluid flows is formed by spraying the coating liquid containing an acrylic component. According to clause 8,
In the step of forming the flow path portion,
A fabric-based fluid fuel cell manufacturing method, wherein the coating liquid contains at least one of dimethylsiloxane (polydimethylsiloxane, PDMS) or oiliness ink.