CN217009256U - Novel wearable sweat biofuel cell - Google Patents
Novel wearable sweat biofuel cell Download PDFInfo
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- CN217009256U CN217009256U CN202220164991.7U CN202220164991U CN217009256U CN 217009256 U CN217009256 U CN 217009256U CN 202220164991 U CN202220164991 U CN 202220164991U CN 217009256 U CN217009256 U CN 217009256U
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Abstract
The utility model discloses a novel wearable sweat biofuel cell, which comprises a first insulating barrier layer, a negative electrode layer, a diaphragm layer, a positive electrode layer and a second insulating barrier layer which are sequentially overlapped; the membrane layer is used for adsorbing sweat, the positive electrode layer comprises a gas diffusion electrode, and an opening is formed in the second insulating barrier layer in a penetrating mode and used for enabling a gas diffusion layer of the gas diffusion electrode to be in contact with air. The utility model aims to solve the problem of low power density of the existing biofuel cell.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a novel wearable sweat biofuel cell.
Background
Wearable electronic devices have received much attention in recent years, and in particular, wearable biochemical indicator detection sensors, motion detection sensors, wound healing devices, and the like are used in the fields of fitness and medical care. Most of such small wearable electronic devices utilize button cells as energy supply devices, however, the disposal of these waste button cells can bring pressure to the environment, and the trend of environment-friendly and green energy development is not met.
On the other hand, a biofuel cell is an energy supply device that converts chemical energy in fuel into electrical energy using a biocatalyst such as microorganisms and enzymes. The sweat biofuel cell uses lactic acid in sweat as a substrate, does not need to be additionally fueled or charged, has great potential to replace a button cell, and becomes a next generation energy supply device of the wearable electronic equipment. The structure of the biofuel cell comprises a current collector, an electrode and an insulating barrier layer. The existing sweat biofuel cell still has the problem of low power density.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a novel wearable sweat biofuel cell, and aims to solve the problem that the power density of the conventional biofuel cell is low.
In order to achieve the purpose, the utility model provides a novel wearable sweat biofuel cell, which comprises a first insulating barrier layer, a negative electrode layer, a diaphragm layer, a positive electrode layer and a second insulating barrier layer which are sequentially stacked;
the membrane layer is used for adsorbing sweat, the positive electrode layer comprises a gas diffusion electrode, and an opening is formed in the second insulating barrier layer in a penetrating mode and used for enabling a gas diffusion layer of the gas diffusion electrode to be in contact with air.
Optionally, a catalyst is fixed in each of the positive electrode layer and the negative electrode layer to promote a redox reaction between lactic acid in sweat and oxygen in air on the positive electrode layer and the negative electrode layer.
Optionally, the catalyst arranged on the positive electrode layer is platinum carbon, bilirubin oxidase or laccase.
Optionally, the catalyst disposed on the negative electrode layer is lactate oxidase or lactate dehydrogenase.
Optionally, the negative electrode layer is provided as a conductive material having a porous structure.
Optionally, the conductive material is at least one of conductive carbon paper and carbon nanotube paper.
Optionally, the separator layer comprises a separator paper disposed between the positive electrode layer and the negative electrode layer to block the positive electrode layer and the negative electrode layer.
Optionally, the separator paper is a Nafion proton exchange membrane or a cellulose paper based separator.
Optionally, the extension area of the separator paper is larger than the extension areas of the positive electrode layer and the negative electrode layer.
Optionally, the first insulating barrier layer and the second insulating barrier layer are both provided as a single-sided film tape.
In the technical scheme of the utility model, the novel wearable fuel sweat battery adopts a sandwich-shaped stacked structure, and compared with the existing structure that the anode and the cathode are arranged on the same horizontal plane, the novel wearable fuel sweat battery has the advantages that the diffusion distance is reduced, the integral volume is reduced, and the volume power density is improved; meanwhile, the stacked structure is more compact and stable, and meets the requirement of mechanical strain resistance of wearable equipment. The device is placed at a position where a human body is prone to sweat, the first insulating barrier layer is made to contact with the skin of the human body, after the human body sweats during movement, sweat generated during movement of the human body is absorbed by the diaphragm paper and then diffuses to the surface of the negative electrode layer. The electrode active material layer is not in direct contact with the skin, thereby reducing battery failure due to leakage of the active material and also contributing to reduction of the uncomfortable reaction of the electrode in contact with the skin. The gas diffusion layer of the gas diffusion electrode is directly contacted with the air through the opening, so that oxygen in the air can be directly obtained, the reaction cannot be limited by the low concentration of sweat dissolved oxygen, the oxygen content in the device is improved, the reaction rate is improved, and the power density of the battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of an explosion structure of an embodiment of the novel wearable sweat biofuel cell provided by the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | A first |
4 | Positive electrode layer |
| 2 | |
4a | |
| 3 | Separator layer | 5 | A second |
| 3a | Diaphragm paper | 6 | Opening of the container |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like under a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Wearable electronic devices have received much attention in recent years, and in particular, wearable biochemical indicator detection sensors, motion detection sensors, wound healing devices, and the like are used in the fields of fitness and medical care. This type of miniature wearable electronic device utilizes button cell as energy supply device mostly, handles these old and useless button cell nevertheless and can bring the pressure to the environment, also does not accord with the green energy development trend of environmental protection yet.
On the other hand, a biofuel cell is an energy supply device for converting chemical energy in fuel into electric energy by using a biocatalyst such as microorganisms and enzymes. The sweat biofuel cell uses lactic acid in sweat as a substrate, does not need to be additionally fueled or charged, has a great potential to replace a button cell, and becomes a next generation energy supply device of the wearable electronic device. The structure of the biofuel cell comprises a current collector, an electrode and an insulating barrier layer. The existing sweat biofuel cell still has the problem of low power density.
In view of the above, the present invention provides a novel wearable sweat biofuel cell, and fig. 1 shows an embodiment of the present invention.
Referring to fig. 1, the novel wearable sweat biofuel cell includes a first insulating barrier layer 1, a negative electrode layer 2, a diaphragm layer 3, a positive electrode layer 4 and a second insulating barrier layer 5, which are sequentially stacked; the separator layer 3 is used for adsorbing sweat, the positive electrode layer 4 includes a gas diffusion electrode 4a, and an opening 6 is formed in the second insulating barrier layer 5 in a penetrating manner, so that a gas diffusion layer of the gas diffusion electrode 4a is in contact with air.
In the technical scheme of the utility model, the novel wearable fuel sweat battery adopts a sandwich-shaped stacked structure, and compared with the existing structure that the anode and the cathode are arranged on the same horizontal plane, the novel wearable fuel sweat battery has the advantages that the diffusion distance is reduced, the integral volume is reduced, and the volume power density is improved; meanwhile, the stacked structure is more compact and stable, and meets the requirement of mechanical strain resistance of wearable equipment. The device is placed at a position where sweat is easy to sweat, the first insulating barrier layer 1 is made to contact with the skin of a human body, and after the human body sweats in motion, the sweat generated in motion is absorbed by the diaphragm paper 3a and then diffused to the surface of the negative electrode layer 2. The electrode active material layer is not in direct contact with the skin, thereby reducing battery failure due to leakage of the active material and also contributing to reduction of the uncomfortable reaction of the electrode in contact with the skin. The gas diffusion layer of the gas diffusion electrode 4a is directly contacted with the air through the opening 6, so that oxygen in the air can be directly obtained, the reaction cannot be limited by the low concentration of sweat dissolved oxygen, the oxygen content in the device is improved, the reaction rate is improved, and the power density of the battery is improved.
It should be noted that, the size of opening 6 can be seted up according to actual conditions to reach the best effect that can acquire enough oxygen content, in addition, first insulation barrier layer 1 with second insulation barrier layer 5 has certain intensity, can easily buckle and not fragile, and is right first insulation barrier layer 1 with the inner structure of second insulation barrier layer 5 protects, simultaneously negative pole layer 2 diaphragm layer 3 with positive pole layer 4 all chooses flexible material to make, in order to accord with the human demand of wearing.
Further, a catalyst is fixed in each of the positive electrode layer 4 and the negative electrode layer 2 to promote the redox reaction between lactic acid in sweat and oxygen in air on the positive electrode layer 4 and the negative electrode layer 2. By providing a catalyst on both the positive electrode layer 4 and the negative electrode layer 2, the oxidation reaction and the reduction reaction are promoted to occur, so that chemical energy is converted into electric energy.
Further, the catalyst provided in the positive electrode layer 4 promotes the reduction reaction of oxygen, and specifically, in the present embodiment, the catalyst provided in the positive electrode layer 4 is platinum carbon, bilirubin oxidase, or laccase.
Further, the catalyst provided in the negative electrode layer 2 promotes the oxidation reaction of lactic acid, and specifically, in the present embodiment, the catalyst provided in the negative electrode layer 2 is lactate oxidase or lactate dehydrogenase.
Further, the negative electrode layer 2 is provided as a conductive material having a porous structure. By providing the negative electrode layer 2 with a porous structure, the amount of the catalyst supported by the negative electrode layer 2 can be increased.
Further, the conductive material is at least one of conductive carbon paper and carbon nanotube paper. The negative electrode layer 2 can be independently arranged as conductive carbon paper, can also be independently arranged as carbon nanotube paper, and can also be formed by combining the conductive carbon paper and the carbon nanotube paper.
Further, the separator layer 3 includes a separator paper 3a, and the separator paper 3a is provided between the positive electrode layer 4 and the negative electrode layer 2 to block the positive electrode layer 4 and the negative electrode layer 2. Wherein the separator paper 3a has excellent electrolyte adsorption capacity, and a battery structure is formed by combining the separator layer 3 with the positive electrode layer 4 and the negative electrode layer 2.
Further, since the membrane layer 3 is a core component of the fuel cell, playing a key role in the cell performance, it has not only a barrier function but also a proton conducting function, and specifically, in the present embodiment, the membrane paper 3a is a Nafion proton exchange membrane or a cellulose paper-based membrane.
Further, since the separator paper 3a is used to absorb human sweat, in order to achieve a better adsorption effect, specifically, in the present embodiment, the extending area of the separator paper 3a is larger than the extending area of the positive electrode layer 4 and the negative electrode layer 2. Therefore, when the device is worn by a human body, the diaphragm paper 3a can directly contact the skin of the human body and absorb sweat while isolating the positive electrode layer 4 and the negative electrode layer 2.
Further, the first insulating barrier layer 1 and the second insulating barrier layer 5 are both provided as a single-sided film tape. By setting the first insulating barrier layer 1 and the second insulating barrier layer 5 as single-sided film tapes, the positive electrode layer 4, the separator layer 3 and the negative electrode layer 2 can be fastened and have good hydrophobic performance.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A novel wearable sweat biofuel cell is characterized by comprising a first insulating barrier layer, a negative electrode layer, a diaphragm layer, a positive electrode layer and a second insulating barrier layer which are sequentially stacked;
the membrane layer is used for adsorbing sweat, the positive electrode layer comprises a gas diffusion electrode, and an opening is formed in the second insulating barrier layer in a penetrating mode and used for enabling a gas diffusion layer of the gas diffusion electrode to be in contact with air.
2. The novel wearable sweat biofuel cell of claim 1, wherein said positive electrode layer and said negative electrode layer each have a catalyst immobilized therein for promoting a redox reaction of lactic acid in sweat with oxygen in air on said positive electrode layer and said negative electrode layer.
3. The novel wearable sweat biofuel cell of claim 2, wherein the catalyst provided in said positive electrode layer is platinum carbon, bilirubin oxidase, or laccase.
4. The novel wearable sweat biofuel cell of claim 2, wherein the catalyst disposed in the negative layer is lactate oxidase or lactate dehydrogenase.
5. The novel wearable sweat biofuel cell of claim 1, wherein said negative electrode layer is provided as a conductive material with a porous structure.
6. The novel wearable sweat biofuel cell of claim 5, wherein said electrically conductive material is at least one of electrically conductive carbon paper and carbon nanotube paper.
7. The novel wearable sweat biofuel cell of claim 1, wherein said separator layer comprises a separator paper disposed between said positive electrode layer and said negative electrode layer to block said positive electrode layer from said negative electrode layer.
8. The novel wearable sweat biofuel cell of claim 7, wherein said membrane paper is a Nafion proton exchange membrane or cellulose paper based membrane.
9. The novel wearable sweat biofuel cell of claim 7, wherein said separator paper has an extended area that is larger than the extended area of said positive electrode layer and said negative electrode layer.
10. The novel wearable sweat biofuel cell of claim 1 wherein said first insulating barrier layer and said second insulating barrier layer are each provided as a single-sided thin film adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220164991.7U CN217009256U (en) | 2022-01-20 | 2022-01-20 | Novel wearable sweat biofuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220164991.7U CN217009256U (en) | 2022-01-20 | 2022-01-20 | Novel wearable sweat biofuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217009256U true CN217009256U (en) | 2022-07-19 |
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| CN202220164991.7U Active CN217009256U (en) | 2022-01-20 | 2022-01-20 | Novel wearable sweat biofuel cell |
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|---|---|
| CN (1) | CN217009256U (en) |
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- 2022-01-20 CN CN202220164991.7U patent/CN217009256U/en active Active
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