CN117497793A - Self-priming microfluidic fuel cell with rolled paper-wrapped electrode - Google Patents
Self-priming microfluidic fuel cell with rolled paper-wrapped electrode Download PDFInfo
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- CN117497793A CN117497793A CN202311527143.3A CN202311527143A CN117497793A CN 117497793 A CN117497793 A CN 117497793A CN 202311527143 A CN202311527143 A CN 202311527143A CN 117497793 A CN117497793 A CN 117497793A
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- 239000000446 fuel Substances 0.000 title claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000003054 catalyst Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 3
- 210000004027 cell Anatomy 0.000 claims abstract 16
- 210000003850 cellular structure Anatomy 0.000 claims abstract 2
- 238000010521 absorption reaction Methods 0.000 claims description 9
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000003575 carbonaceous material Substances 0.000 claims description 6
- 239000003115 supporting electrolyte Substances 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 15
- 230000002745 absorbent Effects 0.000 description 11
- 239000002250 absorbent Substances 0.000 description 11
- 239000012295 chemical reaction liquid Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000037427 ion transport Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04171—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal using adsorbents, wicks or hydrophilic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Abstract
The embodiment of the application relates to a self-priming micro-fluid fuel cell with a rolled paper-wrapped electrode, and belongs to the technical field of fuel cells. The embodiment of the application aims to solve the technical problems that the existing self-priming microfluidic fuel cell is low in common discharge performance and overlarge in internal resistance. The self-priming microfluidic fuel cell with the rolled paper-wrapped electrode comprises an absorbing piece, a cell component and a liquid storage tank which are sequentially arranged from top to bottom; the battery assembly comprises a paper-covered anode, a blank channel and a paper-covered cathode which are sequentially arranged from outside to inside, wherein the paper-covered anode, the blank channel and the paper-covered cathode are all made of porous filter paper into a hollow body structure with two open ends, and the porous filter paper of the paper-covered cathode and the paper-covered anode is coated with a conductive catalyst layer; the liquid storage tank is internally provided with an anolyte storage area and a catholyte storage area which correspond to the paper-covered anode and the paper-covered cathode respectively. The self-priming microfluidic fuel cell provided by the embodiment of the application remarkably reduces the internal resistance of the cell.
Description
Technical Field
The embodiment of the application relates to the technical field of fuel cells, in particular to a self-priming micro-fluid fuel cell with a rolled paper-wrapped electrode.
Background
Fuel cells are an efficient, clean and sustainable energy technology that is currently in a growing and mature stage. By improving the catalyst, optimizing the materials and innovative system design, the performance of the fuel cell is significantly improved. In addition, researchers are also striving to develop new catalysts and materials to reduce cost, improve sustainability, and improve stability and life of fuel cells.
Microfluidic fuel cells, which are a branch of fuel cell technology, have many advantages. First, microfluidic fuel cells have small size and high integration, and the micro-scale mixing and transporting of fuel and oxidant using microfluidic and micromachining techniques allows for higher power and energy densities for microfluidic fuel cells suitable for portable devices and microelectronics. Second, microfluidic fuel cells generally have faster start-up times and response speeds due to their small size and unique design, and are suitable for applications requiring instant energy supply, such as sensors and mobile devices. In addition, microfluidic fuel cells can use a variety of fuels, such as hydrogen, methanol, ethanol, and methane, and the like, the variety of which enables microfluidic fuel cells to accommodate different application requirements and provide more flexible energy options. Finally, microfluidic fuel cells can generally operate at lower temperatures, which is advantageous over some high temperature fuel cells, which reduces the thermal management costs of the system and increases reliability and performance stability in low temperature environments.
Self-priming microfluidic fuel cells are a current research hotspot in the field of microfluidic fuel cells. The passive transportation of the cathode and anode reaction liquid is realized by utilizing the capillary action of the paper-based channel, an external pump is not needed, and the transportation problem of the cathode and anode reaction liquid is solved. However, the current self-priming microfluidic fuel cell has low discharge performance generally because the contact area between the electrode and the electrolyte is limited, but the parasitic current is generated by the traditional method of increasing the electrode size along the flow direction of the reactant liquid. In addition, since the paper-based channels are mostly made of single-layer filter paper, the cross-sectional area of the cathode and anode ion transport channels is limited by the thickness of the filter paper (mostly a few tenths of a millimeter), resulting in excessive internal resistance of the battery.
Disclosure of Invention
In view of this, the embodiment of the application provides a self-priming microfluidic fuel cell with a rolled paper-wrapped electrode, so as to solve the technical problems of low discharge performance and excessive internal resistance of the existing self-priming microfluidic fuel cell.
The embodiment of the application provides a self-priming microfluidic fuel cell with a rolled paper-wrapped electrode, which comprises an absorbing piece, a cell assembly and a liquid storage tank which are sequentially arranged from top to bottom;
the battery assembly comprises a paper-covered anode, a blank channel and a paper-covered cathode which are sequentially arranged from outside to inside, wherein the paper-covered anode, the blank channel and the paper-covered cathode are all made of porous filter paper into a hollow body structure with two open ends, and conductive catalyst layers are coated on the porous filter paper of the paper-covered anode and the paper-covered cathode and are positioned on the inner side of the hollow body structure;
the liquid storage tank is internally provided with an anolyte storage area and a catholyte storage area respectively, the anolyte storage area and the catholyte storage area are respectively loaded with anolyte and catholyte, and the anolyte storage area and the catholyte storage area respectively correspond to the paper-wrapped anode and the paper-wrapped cathode.
In some embodiments, which may include the above embodiments, the paper-wrapped anode includes a paper-wrapped anode outer wall surface, a paper-wrapped anode inner wall surface, and a paper-wrapped anode pin located on the paper-wrapped anode outer wall surface; or (b)
The blank channel comprises a blank channel outer wall surface and a blank channel inner wall surface; or (b)
The paper-covered cathode comprises a paper-covered cathode outer wall surface, a paper-covered cathode inner wall surface and paper-covered cathode pins, wherein the paper-covered cathode pins are positioned on the paper-covered cathode inner wall surface;
the paper package anode, the blank channel and the paper package cathode are sequentially attached.
In some embodiments that may include the foregoing embodiments, the liquid storage tank is a rectangular parallelepiped structure with one end open, and has a first wall surface; an annular partition plate is arranged in the liquid storage tank and provided with a second wall surface; the anode liquid storage area is formed between the first wall surface and the second wall surface, and the cathode liquid storage area is formed by the containing cavity in the annular separator.
In some embodiments, which may include the foregoing embodiments, the paper-covered anode inner wall surface is attached to an outer side of the second wall surface, the paper-covered cathode outer wall surface is attached to an inner side of the second wall surface, and bottoms of the paper-covered cathode and the paper-covered anode are both attached to a bottom of the liquid storage tank; the thickness of the blank channel is the same as the wall thickness of the second wall surface, the bottom of the blank channel is attached to the top of the second wall surface, and the top of the blank channel, the top of the paper package cathode and the top of the paper package anode are arranged in a flush manner; the bottom of the absorbing piece is attached to the top of the paper package cathode, the top of the blank channel and the top of the paper package anode.
In some embodiments, which may include the above embodiments, the paper-wrapped cathode and the paper-wrapped anode are the same height; or (b)
The heights of the paper-coated cathode and the paper-coated anode are 9.3cm; or (b)
The lengths of the paper package cathode pins and the paper package anode pins are 1cm, and the heights of the paper package cathode pins and the paper package anode pins are 3cm; or (b)
The height of the blank channel is 5.5cm; or (b)
The thickness of the porous filter paper is 0.15-0.3mm; or (b)
The thickness of the porous filter paper is 0.2mm.
In some embodiments, which may include the embodiments described above, the reservoir is made of a polymethyl methacrylate material.
In some embodiments, which may include the embodiments described above, the anolyte is an aqueous solution of fuel and supporting electrolyte and the catholyte is an aqueous solution of oxide and supporting electrolyte.
In some embodiments, which may include the above embodiments, the absorbent member is made of a water absorbent material; or (b)
The absorption piece is of a cube structure with a cylindrical through groove in the middle, and comprises an absorption pad outer wall surface and an absorption pad inner wall surface, wherein the side length is 4cm, the height is 2cm, and the diameter of the cylindrical through groove is 2cm.
In some embodiments, which may include the foregoing embodiments, the first wall has a square structure, a wall thickness of 2mm, a height of 5cm, and a side length of 5cm; the second wall surface is of a square structure, the wall thickness is 1mm, the height is 3.8cm, and the side length is 3cm; the wall thickness of the bottom of the liquid storage tank is 2mm.
In some embodiments, which may include the above embodiments, the conductive catalyst layer is one or more of a platinum catalyst, a palladium catalyst, a platinum-carrying carbon material, and a palladium-carrying carbon material; or (b)
The height of the conductive catalyst layer is 3cm; or (b)
The distance between the top of the conductive catalyst layer and the top of the paper-coated cathode/paper-coated anode was 1.5cm; or (b)
The distance between the bottom of the conductive catalyst layer and the bottom of the paper-coated cathode/paper-coated anode was 4.8cm.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
according to the self-priming microfluidic fuel cell, automatic liquid feeding of the microfluidic fuel cell is achieved based on capillary flow; by increasing the electrode area in the direction perpendicular to the flow path of the reaction liquid, the generation of parasitic current is avoided while improving the battery performance; through the design of the blank channel, the cross section area of a transport channel is effectively increased when ions are transported between the anode and the cathode, and the internal resistance of the battery is further remarkably reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a self-priming microfluidic fuel cell according to an embodiment of the present application;
FIG. 2 is an exploded schematic view of a self-priming microfluidic fuel cell according to an embodiment of the present application;
fig. 3 is an overall cross-sectional view of a self-priming microfluidic fuel cell according to an embodiment of the present application;
fig. 4 is a schematic structural view of an absorber in a self-priming microfluidic fuel cell according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a paper-coated cathode in a self-priming microfluidic fuel cell according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a hollow white channel of a self-priming microfluidic fuel cell according to an embodiment of the present application;
FIG. 7 is a schematic view of the structure of a paper-wrapped anode in a self-priming microfluidic fuel cell according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a liquid storage tank in a self-priming microfluidic fuel cell according to an embodiment of the present application.
Reference numerals illustrate:
1. an absorbent member;
101. an outer wall surface of the absorption pad, 102, an inner wall surface of the absorption pad;
2. a paper-coated cathode;
201. paper-covered cathode outer wall surface 202, paper-covered cathode inner wall surface 203, paper-covered cathode pin;
3. blank channels;
301. a blank channel outer wall surface, 302, a blank channel inner wall surface;
4. a paper-wrapped anode;
401. a paper-wrapped anode outer wall surface 402, a paper-wrapped anode inner wall surface 403 and a paper-wrapped anode pin;
5. a liquid storage tank;
501. a first wall 502, a second wall 503, an anolyte reservoir, 504, and a catholyte reservoir.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. Those skilled in the art can adapt it as desired to suit a particular application.
Further, it should be noted that, in the description of the present application, terms such as "upper," "lower," "left," "right," "front," "rear," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or component must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The self-priming microfluidic fuel cells of the related art have low universal discharge performance mainly due to limited contact area between the electrodes and the electrolyte, but conventional methods of increasing the electrode size in the direction of the reactant flow velocity can result in parasitic current generation. In addition, the paper-based channel is mostly made of single-layer filter paper, and the cross-sectional area of the cathode and anode ion transport channel is limited by the thickness of the filter paper (mostly a few tenths of a millimeter), so that the technical problem of overlarge internal resistance of the battery is caused.
In order to solve the above technical problems, referring to fig. 1 and 2, an embodiment of the present application provides a self-priming microfluidic fuel cell with a rolled paper-wrapped electrode, which includes an absorber 1, a cell assembly and a liquid storage tank 5 sequentially disposed from top to bottom; the battery assembly comprises a paper-covered anode 4, a blank channel 3 and a paper-covered cathode 2 which are sequentially arranged from outside to inside, wherein the paper-covered anode 4, the blank channel 3 and the paper-covered cathode 2 are all made of porous filter paper into a hollow body structure with two open ends, and conductive catalyst layers are coated on the porous filter paper of the paper-covered cathode 2 and the paper-covered anode 4 and are positioned on the inner side of the hollow body structure; the liquid storage tank 5 is respectively provided with an anolyte storage area 503 and a catholyte storage area 504, the anolyte storage area 503 and the catholyte storage area 504 are respectively loaded with anolyte and catholyte, and the anolyte storage area 503 and the catholyte storage area 504 respectively correspond to the paper-coated anode 4 and the paper-coated cathode 2.
The hollow body structure with two open ends can be a cuboid structure, and can also be a cylinder structure, and the application is not limited herein.
In the self-priming microfluidic fuel cell provided by the application, automatic liquid feeding of the microfluidic fuel cell is realized based on capillary flow; by increasing the electrode area in the direction perpendicular to the flow path of the reaction liquid, the generation of parasitic current is avoided while improving the battery performance; through the design of the blank channel, the cross section area of a transport channel is effectively increased when ions are transported between the anode and the cathode, and the internal resistance of the battery is further remarkably reduced.
Further, referring to fig. 7, the paper-covered anode 4 includes a paper-covered anode outer wall surface 401, a paper-covered anode inner wall surface 402, and a paper-covered anode pin 403, and the paper-covered anode pin 403 is located on the paper-covered anode outer wall surface 401.
In one embodiment, the porous filter paper coated with the conductive catalyst layer in the middle is rolled into a square three-dimensional structure from left to right, and the structure is the paper-covered anode 4 of the battery, wherein the bottom of the paper-covered anode 4 is immersed in the anode liquid, and 10 layers are rolled in total, so that the thickness of the paper-covered anode 4 is 2mm.
Further, referring to fig. 6, the blank channel 3 includes a blank channel outer wall surface 301 and a blank channel inner wall surface 302.
Further, referring to fig. 5, the paper covered cathode 2 includes a paper covered cathode outer wall surface 201, a paper covered cathode inner wall surface 202, and a paper covered cathode pin 203, and the paper covered cathode pin 203 is located on the paper covered cathode inner wall surface 202.
In one embodiment, the porous filter paper coated with the conductive catalyst layer in the middle is rolled into a square three-dimensional structure from right to left, and the structure is the paper-covered cathode 2 of the battery, wherein the bottom of the paper-covered cathode 2 is immersed in the cathode liquid, and 15 layers are rolled in total, so that the thickness of the paper-covered cathode 2 is 3mm.
Further, the paper-covered anode 4, the blank channel 3 and the paper-covered cathode 2 are sequentially attached.
In one embodiment, the filter paper is rolled into a square three-dimensional structure from left to right, one side of the structure is tightly attached to the paper-covered anode 4, the other side is tightly attached to the paper-covered cathode 2, the structure is a blank channel 3, 5 layers are rolled in total, and the thickness of the blank channel 3 is 1mm.
Further, referring to fig. 8, the liquid storage tank 5 has a rectangular parallelepiped structure with one end open, and has a first wall surface 501; an annular partition plate is arranged in the liquid storage tank 5 and is provided with a second wall surface 502; an anolyte reservoir 503 is formed between the first wall 501 and the second wall 502, and a catholyte reservoir 504 is formed by a receiving cavity within the annular separator.
Further, referring to fig. 2, the paper-covered anode inner wall surface 402 is attached to the outer side of the second wall surface 502, the paper-covered cathode outer wall surface 201 is attached to the inner side of the second wall surface 502, and the bottoms of the paper-covered cathode 2 and the paper-covered anode 4 are both attached to the bottom of the liquid storage tank 5; the thickness of the blank channel 3 is the same as the wall thickness of the second wall 502, the bottom of the blank channel 3 is attached to the top of the second wall 502, and the top of the blank channel 3, the top of the paper-covered cathode 2 and the top of the paper-covered anode 4 are arranged in a flush manner; the bottom of the absorber 1 is attached to the top of the paper-coated cathode 2, the top of the blank channel 3 and the top of the paper-coated anode 4.
Further, referring to fig. 5-7, the paper coated cathode 2 and the paper coated anode 4 are the same in height; preferably, the height of the paper-coated cathode 2 and the paper-coated anode 4 is 9.3cm; the paper-covered cathode pins 203 and the paper-covered anode pins 403 are 1cm in length and 3cm in height; the height of the blank channel 3 is 5.5cm; the thickness of the porous filter paper is 0.15-0.3mm; preferably, the porous filter paper has a thickness of 0.2mm.
Further, the liquid storage tank 5 is made of polymethyl methacrylate material.
In operation, when the height of the reaction liquid in the liquid storage tank 5 is reduced to 0.1cm, the reaction liquid needs to be replenished into the liquid storage tank 5 to maintain the stable operation of the battery.
Further, the anolyte is an aqueous solution of fuel and supporting electrolyte, such as a mixed solution of formic acid and potassium chloride; the catholyte is an aqueous solution of an oxide and a supporting electrolyte, such as a mixed solution of hydrogen peroxide and potassium chloride, and is not described herein.
It should be noted that the self-priming microfluidic fuel cell structure of the present application is applicable to a variety of electrochemical systems.
Further, referring to fig. 4, the absorbent member 1 is made of a water absorbent material, the bottom of which is attached to the paper-covered cathode 2, the paper-covered anode 4 and the top of the empty channel 3, and the absorbent member 1 absorbs the reacted liquid, and the absorbent member 1 is replaced with a new absorbent member 1 after saturation of the absorption so as to maintain a stable laminar flow.
Illustratively, the absorbent member 1 has a cubic structure with a cylindrical through groove in the middle, and includes an outer wall surface 101 of the absorbent pad and an inner wall surface 102 of the absorbent pad, the side length is 4cm, the height is 2cm, and the diameter of the cylindrical through groove is 2cm.
Further, referring to fig. 8, the first wall 501 has a square structure, a wall thickness of 2mm, a height of 5cm, and a side length of 5cm; the second wall 502 has a square structure, the wall thickness is 1mm, the height is 3.8cm, and the side length is 3cm; the wall thickness of the bottom of the liquid storage tank 5 is 2mm.
Further, one or more of a platinum catalyst, a palladium catalyst, a platinum-carrying carbon material and a palladium-carrying carbon material of the conductive catalyst layer; illustratively, the height of the conductive catalyst layer is 3cm; the distance between the top of the conductive catalyst layer and the top of the paper-coated cathode 2/paper-coated anode 4 was 1.5cm; the distance between the bottom of the conductive catalyst layer and the bottom of the paper-coated cathode 2/paper-coated anode 4 was 4.8cm.
In summary, the self-priming microfluidic fuel cell of the embodiments of the present application realizes automatic liquid feeding of the microfluidic fuel cell based on capillary flow; by increasing the electrode area in the direction perpendicular to the flow path of the reaction liquid, the generation of parasitic current is avoided while improving the battery performance; through the design of the blank channel, the cross section area of a transport channel is effectively increased when ions are transported between the anode and the cathode, and the internal resistance of the battery is further remarkably reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The self-priming micro-fluid fuel cell with the rolled paper-wrapped electrode is characterized by comprising an absorbing piece (1), a cell component and a liquid storage tank (5) which are sequentially arranged from top to bottom;
the battery assembly comprises a paper-covered anode (4), a blank channel (3) and a paper-covered cathode (2) which are sequentially arranged from outside to inside, wherein the paper-covered anode (4), the blank channel (3) and the paper-covered cathode (2) are all made of porous filter paper into a hollow body structure with two open ends, and conductive catalyst layers are coated on the porous filter paper of the paper-covered cathode (2) and the paper-covered anode (4) and are positioned on the inner sides of the hollow body structure;
an anolyte storage area (503) and a catholyte storage area (504) are respectively arranged in the liquid storage tank (5), anolyte and catholyte are respectively loaded in the anolyte storage area (503) and the catholyte storage area (504), and the anolyte storage area (503) and the catholyte storage area (504) respectively correspond to the paper-wrapped anode (4) and the paper-wrapped cathode (2).
2. The self-priming microfluidic fuel cell with rolled paper-wrapped electrode according to claim 1, wherein the paper-wrapped anode (4) comprises a paper-wrapped anode outer wall surface (401), a paper-wrapped anode inner wall surface (402) and a paper-wrapped anode pin (403), the paper-wrapped anode pin (403) being located on the paper-wrapped anode outer wall surface (401); or (b)
The blank channel (3) comprises a blank channel outer wall surface (301) and a blank channel inner wall surface (302); or (b)
The paper-covered cathode (2) comprises a paper-covered cathode outer wall surface (201), a paper-covered cathode inner wall surface (202) and a paper-covered cathode pin (203), wherein the paper-covered cathode pin (203) is positioned on the paper-covered cathode inner wall surface (202);
the paper package anode (4), the blank channel (3) and the paper package cathode (2) are sequentially attached.
3. Self-priming microfluidic fuel cell with rolled paper wrapped electrode according to claim 2, characterized in that the reservoir (5) is of rectangular parallelepiped structure with one end open, with a first wall (501); an annular partition plate is arranged in the liquid storage tank (5), and the annular partition plate is provided with a second wall surface (502); the anolyte storage area (503) is formed between the first wall surface (501) and the second wall surface (502), and the catholyte storage area (504) is formed by a containing cavity in the annular separator.
4. A self-priming microfluidic fuel cell with rolled paper-wrapped electrode according to claim 3, characterized in that the paper-wrapped anode inner wall (402) is attached to the outside of the second wall (502), the paper-wrapped cathode outer wall (201) is attached to the inside of the second wall (502), and the paper-wrapped cathode (2) and the paper-wrapped anode (4) are both attached to the bottom of the reservoir (5); the thickness of the blank channel (3) is the same as the wall thickness of the second wall surface (502), the bottom of the blank channel (3) is attached to the top of the second wall surface (502), and the top of the blank channel (3), the top of the paper bag cathode (2) and the top of the paper bag anode (4) are arranged in a flush manner; the bottom of the absorbing piece (1) is attached to the top of the paper package cathode (2), the top of the blank channel (3) and the top of the paper package anode (4).
5. Self-priming microfluidic fuel cell with rolled paper-wrapped electrode according to claim 2, characterized in that the paper-wrapped cathode (2) and paper-wrapped anode (4) are of the same height; or (b)
The heights of the paper-coated cathode (2) and the paper-coated anode (4) are 9.3cm; or (b)
The lengths of the paper package cathode pins (203) and the paper package anode pins (403) are 1cm, and the heights are 3cm; or (b)
The height of the blank channel (3) is 5.5cm; or (b)
The thickness of the porous filter paper is 0.15-0.3mm; or (b)
The thickness of the porous filter paper is 0.2mm.
6. Self-priming microfluidic fuel cell with rolled paper-wrapped electrode according to claim 1, characterized in that the reservoir (5) is made of polymethyl methacrylate material.
7. The self-priming microfluidic fuel cell with rolled paper wrapped electrode according to claim 1, wherein the anolyte is an aqueous solution of fuel and supporting electrolyte and the catholyte is an aqueous solution of oxide and supporting electrolyte.
8. Self-priming microfluidic fuel cell with rolled paper wrapped electrode according to claim 1, characterized in that the absorbing member (1) is made of a water absorbing material; or (b)
The absorption piece (1) is of a cube structure with a cylindrical through groove in the middle, and comprises an absorption pad outer wall surface (101) and an absorption pad inner wall surface (102), wherein the side length is 4cm, the height is 2cm, and the diameter of the cylindrical through groove is 2cm.
9. A self-priming microfluidic fuel cell with rolled paper wrapped electrode according to claim 3, characterised in that the first wall (501) is square in structure, 2mm thick, 5cm high and 5cm long on side; the second wall surface (502) is of a square structure, the wall thickness is 1mm, the height is 3.8cm, and the side length is 3cm; the wall thickness of the bottom of the liquid storage tank (5) is 2mm.
10. The self-priming micro fluidic fuel cell with rolled paper wrapped electrode according to claim 1, wherein the conductive catalyst layer is one or more of platinum catalyst, palladium catalyst, platinum-loaded carbon material and palladium-loaded carbon material; or (b)
The height of the conductive catalyst layer is 3cm; or (b)
The distance between the top of the conductive catalyst layer and the top of the paper-coated cathode (2)/paper-coated anode (4) is 1.5cm; or (b)
The distance between the bottom of the conductive catalyst layer and the bottom of the paper-coated cathode (2)/paper-coated anode (4) was 4.8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311527143.3A CN117497793A (en) | 2023-11-16 | 2023-11-16 | Self-priming microfluidic fuel cell with rolled paper-wrapped electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311527143.3A CN117497793A (en) | 2023-11-16 | 2023-11-16 | Self-priming microfluidic fuel cell with rolled paper-wrapped electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117497793A true CN117497793A (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311527143.3A Pending CN117497793A (en) | 2023-11-16 | 2023-11-16 | Self-priming microfluidic fuel cell with rolled paper-wrapped electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117497793A (en) |
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2023
- 2023-11-16 CN CN202311527143.3A patent/CN117497793A/en active Pending
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