KR20230040449A - Fabric-based fluid fuel cell and manufacturing method thereof - Google Patents

Abstract

A fabric-based fluid fuel cell for improving the performance of a fuel cell to enable long-term operation is provided. The fabric-based fluid fuel cell includes: a body unit made of a fabric; a flow path unit which is formed in the body unit and through which a fluid flows; a pair of electrode units printed on the outer surface so that a part of the body unit can be connected to the flow path unit; and a coating unit that comprises components that do not absorb the fluid and is applied to the outer surface of the body unit to form the flow path unit.

Description

Fabric-based fluid fuel cell and manufacturing method thereof

The present invention relates to a fabric-based fluid fuel cell and a manufacturing method thereof, and more particularly, to a fabric-based fluid fuel cell for improving the performance of a fuel cell to enable long-term operation.

As the demand for wearable devices increases, a power source capable of stably driving even under bending or bending mechanical deformation is attracting attention. Accordingly, research on paper-based electrochemical microfluidic fuel cells, which have flexible properties and are low-cost and high-efficiency, is being actively conducted.

However, since the paper-based electrochemical microfluidic fuel cell is manufactured on a paper basis, the duration is short, and the flexibility of the hydrophobic region is deteriorated due to the curing of the photoresist in the process of manufacturing a flow path through an exposure process. In addition, in previous studies, electrodes are attached with nanowires, wraps, etc., which increases contact resistance and causes power loss.

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

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

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

The technical problem of the present invention is 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 following description.

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

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

The first electrode part and the second electrode part may be formed to be spaced apart from each other by a preset distance.

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

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

The coating part may include an acrylic component.

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

The fabric-based fluid fuel cell manufacturing method of the present invention includes the steps of preparing a fabric-based main body, printing a pair of electrodes on the outer surface of the main body, and spraying a coating liquid on the outer surface of the main body to produce a fluid. and forming a flow path portion through which the is flowing.

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

In the printing of the electrode part, the first electrode part and the second electrode part may be printed on the body part so as to have a preset interval.

In the printing of the electrode parts, the pair of electrode parts may be printed so as to overlap each other on different surfaces of the main body part.

In the printing of the electrode parts, the pair of electrode parts may be printed symmetrically on different surfaces of the body part with respect to the flow path part.

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

In the step of forming the flow path part, the coating solution may include at least one of a dimethylsiloxane (PDMS) or an oiliness ink component.

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

In addition, the fabric-based fluid fuel cell of the present invention is environmentally friendly, can be mass-produced in the process of product aspects, and has characteristics that can minimize manufacturing costs.

In addition, the fabric-based fluid fuel cell of the present invention has the characteristics 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 taken along line AA.
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 taken along line AA.
5 is a diagram of a fabric-based fluid fuel cell according to another embodiment of the present invention.
6 is a flowchart of a fabric-based fluid fuel cell manufacturing method according to the present invention.
FIG. 7 is a view for explaining in detail the printing of the electrode part in FIG. 6 .
FIG. 8 is a view for explaining in detail the formation of the flow path portion by spraying the coating liquid in FIG. 6 .
FIG. 9 is a view for explaining an example of cutting a plurality of fluid fuel cells in FIG. 6 .
10 is a graph showing OCV values for each time period according to fabric types.
11 is a graph showing maximum current density values according to fabric types.
12 is a graph showing maximum power density values according to fabric types.
13 is a graph showing OCV values for each time period according to the shape of the electrode part.
14 is a graph showing a linear-sweep measurement graph according to the shape of an electrode part and a maximum power density and a maximum current density.
15 is an EIS graph according to the shape of the electrode part.
16 is a graph showing OCV values at different times according to an acidic electrolyte and a basic electrolyte.
17 is a linear-sweep measurement graph according to an acidic electrolyte and a graph showing maximum power density and maximum current density.
18 is a linear-sweep measurement graph according to basic electrolyte and a graph showing maximum power density and maximum current density.
19 is an EIS graph according to an acidic electrolyte and a basic electrolyte.
20 is a graph of the duration of a stop flow state.
21 is a graph of the duration of a Continuous Flow state.

Advantages and features of the present invention and methods for achieving them will become clear with reference to the detailed description of the following embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete and those skilled in the art in the art to which the present invention belongs It is provided to fully inform the person of the scope of the invention, and the invention is defined only by the claims. Like reference numerals designate like elements throughout the specification.

The fabric-based fluid fuel cell 1 of the present invention is a fuel cell that has flexibility and generates power using capillary action without an external power source. The fabric-based fluid fuel cell 1 is characterized in that the flexible properties of the microfluidic channel can be maintained by using a waterproof spray instead of a photoresist when fabricating the microfluidic channel through which the fluid flows (the flow path portion 30 in FIG. 1 ).

In addition, the fabric-based fluid fuel cell 1 of the present invention includes a fabric-based continuous flow type structure, is environmentally friendly, has a low manufacturing cost, and has improved short duration, which is a disadvantage of fluid fuel cells. There are possible features.

The fabric-based fluid fuel cell 1 of the present invention can reduce power loss due to electrode attachment in a conventional microfluidic fuel cell by printing electrodes using a screen printing method, and mass-produced products due to a single-layer fabrication structure. It has the characteristics of being able to mass-produce in the process.

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 .

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

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 body portion 10, a pair of electrode portions 20 printed on different surfaces of the body portion 10, and formed on the body portion 10 to allow fluid to flow. It includes a flow path portion 30 and a coating portion 40 composed of a component that does not absorb fluid and applied to different surfaces of the body portion 10 to form the flow path portion 30 .

Hereinafter, each component will be described in detail.

The main body 10 forms a housing of the fabric-based fluid fuel cell 1, and may be made of a textile product (woven, knitted, non-woven fabric, etc.) such as a fabric capable of absorbing fluid by capillarity. For example, the main body 10 is 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) to form the substrate of the fabric-based fluid fuel cell (1). can

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

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

'Upper surface' in this specification means a surface located on the upper side of the body portion 10 based on the cross-sectional view of FIG. 2 . In addition, 'lower surface' means a surface located on the lower side of the body portion 10 based on the body portion 10 in FIG.

The first electrode unit 21 and the second electrode unit 22 are an anode electrode (Anolyte) and a cathode electrode (Catholyte) of the fabric-based fluid fuel cell 1, and at least partially connected to a flow path portion 30 to be described later. It may be printed on the upper and lower surfaces of the body portion 10 as possible. At this time, the first electrode part 21 and the second electrode part 22 may be formed to be offset from each other without overlapping the upper and lower surfaces of the body part 10 as shown in FIG. 2 . The first electrode part 21 and the second electrode part 22 may be formed to be symmetrical about the flow path part 30, and when the main body part 10 is folded along line B-B in FIG. 1, they overlap each other. can

The first electrode unit 21 and the second electrode unit 22 in the first embodiment have been described as an example in which the upper and lower surfaces of the main body unit 10 are displaced from each other without overlapping each other. However, it is not limited thereto, and the first electrode unit 21 and the second electrode unit 22 may be overlapped on the upper and lower surfaces of the body unit 10, and in this regard, the second embodiment will be described in detail.

The first electrode unit 21 and the second electrode unit 22 may be printed on the upper and lower surfaces of the body unit 10 at predetermined intervals from each other. Here, the preset interval means a minimum interval at which resistance is not generated due to interference between the first electrode unit 21 and the second electrode unit 22 .

The fluid fuel cell in the present specification uses a fabric-based body portion 10 and has a slight thickness unlike paper, but the first electrode portion 21 and the first electrode portion 21 printed on different surfaces of the body portion 10 Including the structure of the two-electrode unit 22, the distance between the anode electrode and the cathode electrode can be minimized. In particular, the first electrode unit 21 and the second electrode unit 22 are printed on the upper and lower surfaces of the body unit 10 to have a predetermined distance from each other, thereby avoiding the disadvantages due to the difference in thickness from paper-based fluid fuel cells. It has the characteristics of being able to produce high power with low resistance by overcoming it.

In the first electrode part 21 and the second electrode part 22, a pre-manufactured OHP film (OHP film, Alpha, Korea) is placed on the upper and lower surfaces of the body part 10, and the electrode solutions 23 and 24 are placed on the OHP film. ) may be applied and formed on the body portion 10. The first electrode part 21 and the second electrode part 22 are screen-printed on the body part 10 with the electrode solutions 23 and 24 mixed in advance using OHP films whose upper and lower surfaces are laser-cut in the shape of electrodes. screen printing). Accordingly, the first electrode unit 21 and the second electrode unit 22 are formed by the positive electrode film (see 210 in FIG. 7B) and the positive electrode film (see 220 in FIG. 7B) previously made of an 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 may be prepared by mixing graphene with a corresponding amount of a catalyst per predetermined electrode area. 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)) in a graphene mixture (Graphene Paste), The amount of catalyst and acid catalyst may be adjusted according to the weight and area of the electrode unit 20 . Electrode solutions 23 and 24 may be a mixture of 37 mg of catalyst and 37 ul of acid catalyst (nafion) per 1 g of graphene paste. The positive electrode solution 23 and the negative electrode solution 24 with a catalyst are applied by screen printing technique, and the coated electrode solutions 23 and 24 are heated in an oven at a high temperature to form the first electrode part 21 and the second electrode solution 21. An electrode unit 22 may be formed.

The coating unit 40 may be formed at a position adjacent to the electrode unit 20 .

The coating unit 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 body unit 10 . The coating liquid 41 may be made of Neverwet (Neverwet for fabric, Rust-Oleum, USA) capable of preventing permeation and permeation of fluid. In the coating part 40, the above-described coating liquid 41 is sprayed on the upper and lower surfaces of the body part 10 by a stencil technique, and the sprayed coating liquid 41 is dried at room temperature so that it permeates the body part 10 can be formed. Here, the coating unit 40 is sprayed onto the upper and lower surfaces of the main body 10 excluding the location of the electrode unit 20 and the location where the channel unit 30 is to be formed by a pre-manufactured channel unit film (31 in FIG. 8B). It is possible to create a region having hydrophobicity. As the coating part 40 is formed, the flow path part 30 may be formed at a position where the electrode part 20 and the coating part 40 are not formed in the main body part 10 .

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

On the other hand, detailed chemical components of the coating liquid 41 constituting the coating unit 40 may be made of acrylic or aliphatic petroleum distillates, and polydimethylsiloxane (PDMS) or It can be replaced with oiliness ink (　Schmierfδhigkeit　ink).

The passage part 30 forms a flow path for fluids such as fuel and electrolyte introduced from one end of the main body part 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 the coating portion 40 formed by spraying on the upper and lower surfaces of the body portion 10. . The passage part 30 generates a region where fuel flows in a portion other than the coating part 40 formed by permeating the coating liquid 41 into the body part 10 and the electrode part 20 printed on the body part 10. can do.

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

Since the passage part 30 is not formed by etching or removing the photoresist and is manufactured using a waterproof coating liquid 41, all parts of the fabric-based fluid fuel cell 1 can be flexibly manufactured. .

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

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

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

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

The first electrode portion 21a and the second electrode portion 22a may be printed on the upper and lower surfaces of the body portion 10 so that at least a portion thereof is connected to the flow path portion 30 . Unlike the first embodiment, the first electrode part 21a and the second electrode part 22a may overlap the upper and lower surfaces of the body part 10 . Unlike the first embodiment, the first electrode part 21a and the second electrode part 22a may be formed to face each other on the upper and lower surfaces of the body part 10 . Here, that the first electrode part 21a and the second electrode part 22a are overlapped may mean that they are formed on the same vertical line of the body part 10 . That is, the first electrode portion 21a and the second electrode portion 22a may be formed on the same vertical line to be symmetrical about the main body portion 10 . The first electrode part 21a and the second electrode part 22a are printed on different upper and lower surfaces, but are overlapped on the upper and lower surfaces around the main body 10, so that the distance between the positive electrode and the negative electrode can be minimized. In addition, the first electrode part 21a and the second electrode part 22a are arranged to have a preset interval, that is, a minimum interval at which resistance is not generated by interfering with each other, so that resistance is small in the fabric-based body portion 10. It can produce high power.

As described above in the first embodiment, the first electrode part 21a and the second electrode part 22a are electrode solutions 23 and 24 mixed in advance using OHP films whose upper and lower surfaces are laser-cut in the shape of electrodes. Screen printing may be performed on the body portion 10 .

Since the electrode solutions 23 and 24 composed of the components of the electrode part 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 body portion 10 to form the flow path portion 30, and the coating liquid 41 of a component capable of preventing fluid penetration and penetration without absorbing fluid It can be formed by spraying. The coating portion 40a may be sprayed and formed on the upper and lower surfaces of the body portion 10 using a stencil technique. Since the location of the second electrode portion 22a formed on the body portion 10 of the coating portion 40a according to the second embodiment is changed, the spraying location of the coating portion 40a on the body portion 10 may be changed. Accordingly, the cross-sectional shape of the prefabricated flow path film 31 may be manufactured differently from that of the first embodiment, but the body portion 10 excluding the location of the electrode portion 20a and the location where the flow path portion 30 is to be formed. The upper and lower surfaces of the coating liquid 41 are manufactured in a form that can be sprayed. That is, in the channel portion film 31, through-holes are formed at locations other than the location where the channel portion 30 is to be formed and the location of the electrode portion 20a. The coating portion 40a may include a hydrophobic region formed by permeating the coating liquid 41 sprayed through the through-hole of the flow path film 31 into the body portion 10 . The passage part 30 may be formed in a portion of the passage part film 31 that is not sprayed except for the through-hole and the electrode part 20a.

Since components constituting the coating unit 40 are the same as those of one embodiment, a detailed description thereof will be omitted.

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 view according to a fourth embodiment. It is a front view of the fabric-based fluid fuel cell, and FIG. 5d is an enlarged view of portion 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 part 20b and the position where the coating part 40b is formed. virtually identical Therefore, detailed descriptions related to the previously described main body portion 10 and flow path portion 30 will be omitted.

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

The first electrode part 21b and the second electrode part 22b are formed so as to be connected at least partially to the flow path part 30, but unlike in one embodiment, they may be printed on the same side of the body part 10. . The first electrode portion 21b and the second electrode portion 22b may be formed on the same plane and symmetrical about the flow path portion 30 . Even if the first electrode part 21b and the second electrode part 22b are formed on the same surface, they may be disposed to have a minimum distance between each other and prevent resistance from occurring.

As described above in one embodiment, the first electrode part 21b and the second electrode part 22b are composed of electrode solutions 23 and 24 mixed in advance using OHP films whose upper and lower surfaces are laser-cut in the shape of electrodes. Screen printing may be performed on the body portion 10 .

In addition, since the electrode solutions 23 and 24 composed of components of the electrode part 20b are the same as the electrode solutions 23 and 24 in the above-described embodiment, a detailed description thereof will be omitted.

The coating portion 40b is sprayed on the upper surface of the main body portion 10 to form the flow path portion 30, and the coating liquid 41 of a component that does not absorb fluid and can prevent intrusion and permeation of fluid It can be formed by spraying. In the prefabricated channel part film 31 , through-holes may be formed in positions other than the position where the pair of electrode parts 20b and the channel part 30 are formed. Accordingly, the coating portion 40b according to the third embodiment uses the flow path portion film 31 to form the pair of electrode portions 20b and the body portion 10 except for the location where the flow path portion 30 is formed. It may include a hydrophobic region formed by spraying the coating liquid 41 on the upper surface. A pair of the electrode parts 20b is formed on the upper surface of the body part 10 and 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 body portion 10 .

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

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

The first electrode part 21c and the second electrode part 22c are formed differently from the shapes of the electrode parts 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 means the shape of the first electrode part 21c and the second electrode part 22c shown enlarged in FIG. 5C. As the first electrode part 21c and the second electrode part 22c are formed in the shape of a saw blade, the shape of the flow path part 30 can be designed differently, and the fluid introduced into the flow path part 30 flows. path may increase.

In the first electrode part 21c and the second electrode part 22c, electrode solutions 23 and 24 mixed in advance using an OHP film having upper and lower surfaces laser-cut in a blade shape are screen printed on the body part 10. printing) can be formed. Since the electrode solutions 23 and 24 composed of components of the electrode unit 20c are the same as the electrode solutions 23 and 24 in the above-described embodiment, detailed descriptions thereof will be omitted.

The coating portion 40c is sprayed on different surfaces of the main body portion 10 to form the flow path portion 30, and the coating liquid 41 of a component that does not absorb fluid and can prevent intrusion and permeation of fluid ) may be formed by spraying to the body portion 10. The pre-manufactured channel portion film 31 may include through-holes drilled at locations other than the location where the pair of electrode portions 20c and the channel portion 30c are formed. Accordingly, in the coating part 40c according to the fourth embodiment, the coating liquid 41 is sprayed on the upper surface of the body part 10 except for the position where the pair of electrode parts 20c and the flow path part 30c are formed. can be formed A pair of the electrode parts 20c is formed on the upper surface of the body part 10 and 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 body portion 10 .

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

6 is a flow chart of a fabric-based fluid fuel cell manufacturing method of the present invention, FIG. 7 is a view for explaining in more detail the printing of the electrode part in FIG. 6, and FIG. This is a view for explaining the formation of the flow path in more detail, and FIG. 9 is a view for explaining 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.

Although the present invention may manufacture a plurality of fabric-based fluid fuel cells 1, respectively, a plurality of electrode parts 20, a flow path part 30, and a coating part 40 are printed and printed on one main body part 10. By coating and cutting the body portion 10, a plurality of fabric-based fluid fuel cells 1 may be manufactured at one time. In the fabric-based fluid fuel cell manufacturing method, a fabric-based fluid fuel cell manufacturing method will be described later based on manufacturing a plurality of fabric-based fluid fuel cells 1 in one process.

Referring to FIG. 6, in order to manufacture the fabric-based fluid fuel cell 1 of the present invention, a main body portion made of a textile product (woven, knitted, non-woven fabric, etc.) such as a fabric capable of absorbing fluid by capillary action ( 10) is provided (S100). Here, the body part 10 is 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. may form a substrate of the fabric-based fluid fuel cell 1.

After preparing the body portion 10, the electrode portion 20 is printed on different surfaces of the body portion 10 (S200). Regarding the printing of the electrode unit 20, it will be described in more detail with reference to FIG.

Referring to FIGS. 6 and 7 , prior to printing the electrode unit 20 on the body unit 10, the electrode solution to be printed on the electrode unit 20 is mixed (S210). The electrode solution may be formed by mixing a catalyst and graphene paste. The amount of catalyst in the electrode solution may be adjusted according to the weight of the first electrode part 21 and the second electrode part 22 . In addition, the ratio of the catalyst to the acid catalyst may be determined according to the area of the first electrode part 21 and the second electrode part 22 corresponding to the positive electrode and the negative electrode. The electrode solution may be formed by uniformly mixing the catalyst and the 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. Add 37mg of catalyst and 37ul of nafion per 1g to mix.

After mixing the electrode solution, a positive electrode film 210 is provided on the upper surface of the main body 10 (S220). The positive electrode film 210 is a prefabricated OHP film, and may be formed by laser cutting in the shape of the first electrode portion 21 to manufacture the first electrode portion 21 . In addition, while preparing the anode electrode film 210, the anode electrode film 220 may be provided together. Like the anode electrode film 210, the anode electrode film 220 is a prefabricated OHP film, and may be formed by laser cutting in the shape of the second electrode portion 22 to manufacture the second electrode portion 22. . When manufacturing the anode electrode film 210 and the cathode 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 cathode 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, since the fabric-based body part 10 has elasticity unlike paper, it can be temporarily fixed on the upper surface of the body part 10 by spraying a temporary fixative (75 Graphic art, 3M) on the cathode 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 cathode electrode film 210 . When the anode electrode solution 23 is uniformly pushed through the film applicator 25, the cathode electrode solution 23 is printed on the upper surface of the main body 10 through the through-hole of the cathode electrode film 210 (S230). can

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

In the same way as the method of printing the positive electrode solution 23, the positive electrode film 220 is prepared (S240), and the negative 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 the anode electrode film 220 with a temporary fixing spray, the cathode electrode solution 24 is placed on a portion of the anode electrode film 220. let go When the cathode electrode solution 24 is uniformly pushed using the film applicator 25, the cathode electrode solution 24 can be printed on the lower surface of the body portion 10 through the through hole of the cathode electrode film 220. . After the cathode electrode solution 24 is printed, the cathode 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) for adhesion between the positive electrode solution 23 and the negative electrode solution 24.

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

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

Prior to spraying the coating liquid 41 on the main body 10, a flow path film 31 is provided on the upper surface of the main body 10 (S310). The channel portion film 31 is formed by using a laser cutting machine based on filter paper (Whatman, Cat No. 1, UK) having a diameter of 150 mm to determine the position where the electrode portion 20 and the channel portion 30 are to be formed. It is manufactured by drilling holes in the remaining locations. In order to manufacture six fabric-based fluid fuel cells 1 at a time, six flow path films 31 may be manufactured in a connected form. As described above, the anode electrode film 210 and the cathode electrode film 220 may also be manufactured in a form in which six are connected in order to manufacture six fabric-based fluid fuel cells 1 at a time.

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

After the coating liquid 41 is sprayed, the body part 10 is dried at room temperature for 30 minutes so that the coating liquid 41 permeates into the body part 10 through the perforated portion of the flow path film 31 . The coating liquid 41 forms the coating portion 40 of the hydrophobic region permeated into the fabric through the perforated portion of the channel portion film 31 .

On the other hand, the coating liquid 41 does not permeate to the lower surface of the body portion 10 . Accordingly, the process of spraying and drying the coating liquid 41 is repeatedly performed on the lower surface of the body portion 10 by inverting the body portion 10 . The coating liquid 41 permeates into the fabric through the perforated portion of the channel portion film 31 to form the coating portion 40 of 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, a fabric-based fluid fuel cell 1 is formed by cutting (S500) a fluid fuel cell fabricated by connecting a plurality of the fluid fuel cells shown in the drawing as indicated by the dotted line.

10 is a graph showing OCV values for each time period according to fabric types, FIG. 11 is a graph showing maximum current density values according to fabric types, and FIG. 12 is a graph showing maximum power density values according to fabric types.

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

The five materials described above in FIG. 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), Polyester blend (Prism stripe, 0.15mm, Decotop, Korea) fabric-based fluid fuel cell (1) fabrication Then, OCV (Open Circuit Voltage), Linear sweep Voltammetry and EIS were measured to measure and compare the performance according to each fabric material.The fuel and electrolyte used in the experiment were a combination of H2O2 and HCl, and the electrode was It proceeded to the electrode part 20b of the third embodiment.

Looking at the speed according to the type of fabric, the time taken for the fuel and electrolyte to flow from the beginning to the end is different because the material and thickness of the fabric used are 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±0.008mm ² /s for flannel, 3.23±0.15 mm ² /s for span blend, and 0.13 for polyester blend. ±0.00 mm ² /s 6 was measured. 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 FIG. 10, in order to accurately measure the efficiency of the fuel cell, after the electrode applied to the flow path is sufficiently wet, the OCV value is measured every 10 seconds, and the time when a stable section appears Measurements such as linear sweep were carried out in . As a result of the experiment, in the OCV value for each time period according to the fabric type, Paper was 0.695±0.041V, Cotton was 0.802±0.071V, Flannel was 0.534±0.027V, Polyester was 0.392±0.027V, and Blend Span Blend was 0.454±0.039V. has been measured The OCV value for each time period according to the fabric type was measured as the highest value 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 by the Linear sweep Voltammetry measurement 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/cm ² ] 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 the maximum power density will be described with reference to FIGS. 11 and 12 . In the OCV value, Flannel was measured the highest at 0.888V, and at the maximum current density value, Flannel was measured the highest at 2.39mA/cm2, excluding paper, and at the maximum power density value, Flannel was the highest at 0.547mW/cm2. has been measured

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 well, and when the thickness is 0.3mm, it is measured high. These two variables affect the performance. judge

Based on this result, subsequent experiments set the base of the microfluidic fuel cell as Flannel material.

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

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

Linear-sweep voltammetry and EIS measurements were performed to compare fuel cell performance according to the shape of the electrode parts 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 the entire area where the fuel was present was wetted.

Referring to FIG. 13, looking at the COV values according to the shape of the electrode unit, the electrode unit 20 of the first embodiment is 0.543±0.019V, the electrode unit 20a of the second embodiment is 0.604±0.059V, and the third embodiment is 0.543±0.019V. The electrode part 20b measured 0.534±0.027V, and the electrode part 20c of the fourth embodiment measured 0.505±0.041V. Here, the electrode portion 20c in the fourth embodiment showed the highest OCV value of 0.575V. After that, as about 5 minutes passed, 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 find out the performance of the fuel cell by measuring Linear sweep Voltammetry in the part where the OCV value was stabilized, the maximum power density and maximum current density of the fuel cell according to the shape of each electrode were measured, and the measured values are shown in Table 2. 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 unit with reference to FIG. 14, the highest OCV value was measured as 0.921V in the shape of the electrode unit 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 having the shape of the electrode part 20b of the third embodiment. The highest efficiency was measured in the shape of the electrode part 20b of the third embodiment.

Theoretically, the closer the distance between the 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 the electrodes is very close compared to other cases, so interference between the electrodes occurs and interferes with generating power, resulting in power loss It is believed that this appeared Accordingly, in the fabric-based fluid fuel cell 1 of the present invention, a pair of electrode units 20 disposed on different surfaces are arranged to have a minimum distance between each other so as not to cause resistance by interfering with each other.

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

Basic Blade D.Side Basic D. Side Center Ohmic resistance
[Ω] (R _Ω ) 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 _CT 1170.4 ±154.1 1033.68 ±103.14 1138.11 ±109.21 2328.39 ±331.27

Examining the internal resistance values according to the shape of the electrode unit, the internal resistance has the lowest value of 316.32Ω in the shape of the electrode unit 20b according to the third embodiment. Since the resistance value of the third embodiment is small, it produces higher power than other electrode-shaped fuel cells. On the other hand, in the shape of the electrode part 20a according to the second embodiment, the internal resistance has the highest value of 932.65Ω. In the second embodiment, it is judged that the distance between the electrodes was set too close, so that the resistance increased due to the interference between the electrodes. FIGS. 17a and 17b are linear-sweep measurement graphs and graphs showing maximum power density and maximum current density according to acidic electrolytes, and FIGS. 18a and 18b are linear-sweep measurement graphs, maximum power density and maximum current according to basic electrolytes. It is a graph showing density, and FIGS. 19a and 19b are EIS graphs according to an acidic electrolyte and a 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, based on previous research, the performance of the microfluidic fuel cell was compared and measured by using different fuels and electrolytes. An acid electrolyte and a basic electrolyte were combined in the fuel. Combinations of fuel and electrolyte may be shown in Table 4.

fuel electrolyte H ₂ O ₂ HCl H ₂ O ₂ H ₂ SO ₄ HCOOH KCOOH _CH3OH H ₂ O ₂ NaOH HCOOH KCOOH KOH _CH3OH

Linear-sweep Voltammetry and EIS measurements were performed to measure the performance of the fuel cell according to the combination of fuel and electrolyte. Afterwards, the OCV value was measured every 10 seconds. Linear sweep Voltammetry measurement method and EIS measurement were started at the part where OCV was stabilized.

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

In addition, the OCV values for each time period according to the combination of fuel and basic electrolyte were 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 as

Among the 9 combinations, the OCV value was the highest at 0.575V for the previously used combination of hydrogen peroxide and hydrochloric acid. 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 part where the OCV value was stabilized. Table 5 is a table showing fuel cell performance according to fuel and acidic electrolyte combinations, and Table 6 is a table showing fuel cell performance according to fuel and basic electrolyte combinations.

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/cm ² ] 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 _CH3OH +KOH OCV
[V] 0.351
±0.009 0.537
±0.004 0.101
±0.002 0.061
±0.001 Max. Current density
[mA/cm ² ] 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 the fuel and electrolyte with reference to FIGS. 17 and 18, the maximum power density was measured as the highest at 0.888V and 0.547mW / cm2 in the hydrogen peroxide and hydrochloric acid combination, and the maximum current density was The highest was measured at 3.05 mA/cm2 in the combination of methanol and sulfuric acid.

Comparing the group using an acidic electrolyte and the group using a basic electrolyte, the performance of the combination using a basic electrolyte is significantly lower than that of the group using an acidic electrolyte. The reason is that the performance of a fuel cell is correlated with pH. pH was measured by immersing the reaction part in the 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 judged that the acidic medium performs better than the basic medium.

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

When comparing each fuel in the acidic electrolyte group, the maximum power density was high in the order of hydrogen peroxide, methanol, formic acid, and potassium formate, and the performance was measured well. Therefore, it is judged that the hydrogen peroxide reactant using Al has a high performance.

Looking at the internal resistance graph measured by the EIS measurement method according to the fuel and electrolyte with reference to FIG. 19, in the group in which the fuel and acidic electrolyte were combined, the combination of hydrogen peroxide and hydrochloric acid was measured as the lowest resistance at 316.32Ω. In addition, in the group using fuel and basic electrolyte, the combination of potassium formate and potassium hydroxide was measured as the lowest resistance at 240.17Ω.

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

Hereinafter, the performance duration measured by comparing the fabric-based microfluidic fuel cell using a combination of electrolytes with good performance for each fuel in the above-described experiments with reference to FIGS. 20 to 21 and the conventional paper-based microfluidic fuel cell let me explain Measure the performance duration of the fabric-based fluid fuel cell (1) and the paper-based fluid fuel cell in Continuous Flow and Stop Flow states. Continuous flow was measured by chronopotentiometry, the applied current value was 2.2mA (10mA/cm2), and stop flow was measured by chronoamperometry, and the set applied voltage value was half of OCV.

Tables 7 and 8 show the chronopotentiometry setting conditions and the 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 was measured after the electrode was completely wet and the amount of fuel used was 0.039 ml. The experiment was carried out until the time when the current value reached ‘0’ at the end of the measurement. The duration of the Stop Flow state is 25±1.5min for Paper (H2O2+HCl), 90±2.5min for Fabric (H2O2+HCl), 72±3.5min for Fabric (HCOOH+H2SO4), and 72±3.5min for Fabric (KCOOH+H2SO4). 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 had the highest duration of 90 minutes, and the paper-based fluid fuel cell measured as a comparison group had a duration of 25 minutes. It can be seen that when the fabric is based, the duration is significantly increased compared to when the paper is based.

Looking at the duration of the continuous flow state using the chronopotentiometry measurement method with reference to FIG. 21, Paper (H2O2 + HCl) was 77 ± 8min, Fabric (H2O2 + HCl) was 600 ± 21min. Fabric (HCOOH+H2SO4) 220±17min, Fabric (KCOOH+H2SO4) 205±16min, Fabric (CH3OH+H2SO4) 185±21min. Fabric fluid fuel cell using H2O2 fuel lasted the continuous flow state for 10 hours, and the longest duration was measured. The experiment was conducted until the measured voltage value reached half of the initial voltage value, and the fabric-based product had a longer duration than the paper-based product. Fabric is more durable than paper, so it is judged that it provides power for a longer duration.

As a result of the experiment, the fuel cell using H2O2 as fuel was measured the highest. Accordingly, as shown in Table 9, previous studies using H2O2 as fuel and the fabric-based fluid fuel cell (1) were compared. It can be seen that the fabric-based fluid fuel cell (1) has the lowest maximum power density and maximum current density measured compared to previous studies, but has a much better duration in the case of 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 1 M H ₂ O ₂ +0.1 MHC1 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 CNT 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 - This study 1M H ₂ O ₂ +0.5MCl Graphene Paste 0.547 2.37 600
(continuous flow)

Referring to Table 10, when compared with the fabric-based fluid fuel cell (1), sequence number 4 is an electrochemical fuel cell and the rest are micro-bio 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 shows better performance in terms of duration, although the performance is not good when compared to previous studies in sequence.

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) This study 1M H ₂ O ₂ +0.5MCl Graphene Paste 0.547 2.37 600

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains know that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. You will understand. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

1, 1a, 1b, 1c: fabric-based fluid fuel cells
10: body part
20, 20a, 20b, 20c: electrode part
21, 21a, 21b, 21c: first electrode part
22, 22a, 22b, 22c: second electrode part
23: anode electrode solution
24: cathode electrode solution
25: film applicator
30, 30c: flow path part
31: euro part film
40, 40a, 40b 40c: coating part
41: coating liquid

Claims (14)

A body portion formed of fabric;
a flow path portion formed in the body portion and through which fluid flows;
a pair of electrode parts printed on an outer surface of the main body part so as to be partially connected to the flow path part; and
a coating portion composed of a component that does not absorb fluid and applied to an outer surface of the body portion to form the flow path portion;
A fabric-based fluid fuel cell comprising a. According to claim 1,
The electrode unit includes a first electrode unit printed on an upper surface of the body unit and a second electrode unit printed on a lower surface of the body unit. According to claim 2,
The fabric-based fluid fuel cell in which the first electrode part and the second electrode part are formed apart from each other by a preset distance. According to claim 1,
The fabric-based fluid fuel cell, characterized in that the pair of electrode parts are formed to overlap each other on different surfaces of the body part. According to claim 1,
The fabric-based fluid fuel cell wherein the pair of electrode parts are positioned symmetrically around the flow path part in the main body part. According to claim 1,
Fabric-based fluid fuel cell wherein the coating portion includes an acrylic component. According to claim 1,
The coating unit fabric-based fluid fuel cell comprising at least one of polydimethylsiloxane (PDMS) or oiliness ink (Schmierf δ higkeit ink) component. Preparing a fabric-based main body;
printing a pair of electrode parts on an outer surface of the body part; and
Forming a passage through which the fluid flows by spraying a coating liquid on an outer surface of the main body;
Fabric-based fluid fuel cell manufacturing method comprising a. According to claim 8,
The step of printing the electrode part,
A fabric-based fluid fuel cell manufacturing method comprising printing a first electrode on an upper surface of the main body and printing a second electrode on a lower surface of the main body. According to claim 9,
The step of printing the electrode part,
A fabric-based fluid fuel cell manufacturing method in which the first electrode part and the second electrode part are printed on the main body part to have a preset interval. According to claim 8,
The step of printing the electrode part,
A fabric-based fluid fuel cell manufacturing method in which the pair of electrode parts are printed so as to overlap each other on different surfaces of the body part. According to claim 8,
The step of printing the electrode part,
A fabric-based fluid fuel cell manufacturing method in which the pair of electrode parts are printed symmetrically on different surfaces of the body part with the flow path part as the center. According to claim 8,
In the step of forming the flow path,
Fabric-based fluid fuel cell manufacturing method, characterized in that the coating portion comprises an acrylic (Acrylic) component. According to claim 8,
In the step of forming the flow path,
The coating liquid is a fabric-based fluid fuel cell manufacturing method, characterized in that it contains at least one of dimethylsiloxane (polydimethylsiloxane, PDMS) or oil ink (oiliness ink) component.

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