CN110061259A - A kind of air-breathing paper base microfluid fuel cell of embedded anode - Google Patents

A kind of air-breathing paper base microfluid fuel cell of embedded anode Download PDF

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Publication number
CN110061259A
CN110061259A CN201910379791.6A CN201910379791A CN110061259A CN 110061259 A CN110061259 A CN 110061259A CN 201910379791 A CN201910379791 A CN 201910379791A CN 110061259 A CN110061259 A CN 110061259A
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runner
air
paper base
anode
breathing
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CN110061259B (en
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张彪
文金玲
朱恂
叶丁丁
陈蓉
廖强
何雪丰
李俊
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Chongqing University
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Chongqing University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/08Fuel cells with aqueous electrolytes
    • H01M8/083Alkaline fuel cells
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Inert Electrodes (AREA)

Abstract

The invention discloses a kind of air-breathing paper base microfluid fuel cells of embedded anode, including air-breathing cathode, runner, anode and bottom plate;It is characterized by: the runner is set as " Y " type, and stacked by double-deck or multilayer paper base, there are certain intervals between each layer paper base;The air-breathing cathode and anode are separately positioned on runner two sides, and the anode is made of hydrophilic electrode, and one end is embedded in runner in the horizontal direction, and form wedge gap with runner;Anode insertion runner section is provided with Catalytic Layer;Air-breathing cathode is arranged in the top of anode and is located at the other side of runner, and one end of air-breathing cathode is placed on above top layer paper base;The air-breathing cathode is made of hydrophobic porous electrode, and top layer paper base contact portion is provided with Catalytic Layer, which arranges towards runner;The present invention can be widely used in the fields such as the energy.

Description

A kind of air-breathing paper base microfluid fuel cell of embedded anode
Technical field
The present invention relates to fluid fuel cell fields, and in particular to a kind of air-breathing paper base microfluid of embedded anode Fuel cell.
Background technique
The attention degree of environmental protection, public health, personal health is continuously improved in modern society, however at present to environment Large-sized analytic instrument is generallyd use with biochemical substances Concentration Testings various in body fluid, there are at high cost, detection sample requirement amounts greatly, The disadvantages of complicated for operation cumbersome, detection speed is slow, mobile difficult.In recent years, the paper base miniflow of new generation based on electrochemical principle Body chip can realize highly sensitive, high specific quantitative detection, be widely used in the fields such as environmental protection, biomedicine. Paper base micro-fluid chip has the characteristics that at low cost, sample size is few, easy to operate, analysis speed is fast, result is easily read, preferably Meet instant detection technique (point-of-care testing, POCT) spot sampling, detect immediately and is instantly obtained detection knot The requirement of fruit, application range constantly expand, and industrial prospect is persistently become better.However, the above-mentioned paper base miniflow based on electrochemical principle More stringent requirements are proposed to mini mobile power supply for body chip.That there are energy densities is low for conventional lithium ion battery, self discharge loss Greatly, the disadvantages of operation warm area is small, integrated difficult, is not suitable for such paper base micro-fluid chip.As a kind of new micro fuel electricity Pond, paper base microfluid fuel cell are separated using fuel and oxidant fluid capillary seepage flow spontaneous in paper base porous media Yin/Yang pole reactant simultaneously allows ion to transmit, and eliminates proton exchange membrane and Micropump, makes battery design, manufacture, processing, operation It is all more simple, and it is more easily implemented the system integration.In addition, microfluid fuel cell being capable of flexible modulation Yin/Yang pole reactant The bio-fuels such as blood glucose (glucose), urine (urea), sweat (acetate) can be used in component, are expected to utilize and change in body fluid It learns substance and realizes electricity production and detection simultaneously, further increase level of integrated system, it is miniature to become paper base microfluid analysis chip The optimal selection of power supply.
J.P.Esquivel et al. was put forward for the first time the passive type paper base microfluid combustion based on capillary seepage flow in paper in 2014 Expect battery.The cellulose chromatography filter paper of porous structure is cut into Y shape paper base runner, liquid phase reactor object (fuel and electrolyte) according to Spontaneous capillary seepage flow realizes passive transport in paper porous media.Since chromatography filter paper average pore size is smaller (about 1~10 μm), So that Re number is only 10-3Left and right, fuel and electrolyte form parallel capillary flowing, substance between two fluids in paper base runner Transmitting is only horizontal proliferation at liquid-liquid interface.Mixed Zone can be limited in runner by appropriately designed runner geometric dimension It realizes that fuel/electrolyte separates naturally without contacting two lateral electrodes, to remove proton exchange membrane, simplifies structure in middle part.
Main problem existing for paper base microfluid fuel cell is anode side fuel mass transfer and limit at present.It is micro- in traditional paper base In fluid fuel cell, anode catalyst layer is close to paper base runner, fuel passive transport in paper base runner with capillary seepage flow, flowing Speed is lower, and is mainly transmitted to anodic porous Catalytic Layer from paper porous media side with diffusion way, and mass transfer rate is lower.High electricity The fuel consumed when current density cannot be added in time, and it is lower fuel concentration to be formed in paper porous media near anode surface Region, i.e. fuel concentration boundary layer can significantly increase fuel resistance to mass tranfer, cause concentration polarization, limitation battery performance.
Summary of the invention
The present invention is in view of the deficienciess of the prior art, propose a kind of air-breathing paper base microfluid of embedded anode Fuel cell.
The technical scheme is that a kind of air-breathing paper base microfluid fuel cell of embedded anode, including sky Gas breathes cathode, runner, anode and bottom plate certainly;It is characterized by: the runner is set as " Y " type, and by double-deck or multilayer Paper base stacks, and there are certain interval, principal flow passage of the gap as electrolyte and fuel between each layer paper base;Institute It states air-breathing cathode and anode is separately positioned on runner two sides, the anode is made of hydrophilic electrode, and one end is along level Direction is embedded in runner, and forms wedge gap with runner, in favor of accelerating fuel local velocity, enhanced fuel mass transfer;In sun Pole insertion runner section is provided with Catalytic Layer;Air-breathing cathode is arranged in the top of anode and is located at the other side of runner, One end of air-breathing cathode is placed on above top layer paper base;The air-breathing cathode is by hydrophobic porous electrode structure At, and top layer paper base contact portion is provided with Catalytic Layer, which arranges towards runner;The front end of the runner is provided with Two imports, are separately connected electrolyte inlet and fuel inlet, electrolyte inlet setting in air-breathing cathode side, fuel into Mouth is arranged in anode-side, and the rear end of the runner is connect with absorption pad;In the lower section of runner, bottom plate is set.The effect of absorption pad is The liquid of runner exit is absorbed, capillary seepage flow in runner is maintained persistently to carry out.
This patent proposes a kind of air-breathing paper base microfluid fuel cell of embedded anode, and anode is embedded in stream Inside road, anode is avoided directly to contact with oxygen and cause oxidizing agent penetration;Using between-anode-runner the lower part of runner top Gap accelerate anode nearby fuel flow rate, enhanced fuel mass transfer;Simultaneously also using between double/each layer in multi-ply paper base flow road Gap accelerate fluid-flow rate, strengthen reactant mass transfer;Cathode oxidant mass transfer is strengthened using air-breathing cathode.
This patent is from anode side fuel transmission is strengthened, and for the purpose of improving battery performance, anode is embedded in by proposition Inside paper base runner, accelerate fuel flow rate using the gap between each layer medium, strengthens anode fuel transmission.
A kind of preferred embodiment of the air-breathing paper base microfluid fuel cell of embedded anode according to the present invention, Each layer paper base is made of Capillary-Porous Medium.
A kind of preferred embodiment of the air-breathing paper base microfluid fuel cell of embedded anode according to the present invention, The absorption pad is made of the porous media with spontaneous imbibition ability.
A kind of preferred embodiment of the air-breathing paper base microfluid fuel cell of embedded anode according to the present invention, The anode is embedded in the horizontal direction " intersection of Y " type runner, to prevent fuel to be impregnated with.
A kind of preferred embodiment of the air-breathing paper base microfluid fuel cell of embedded anode according to the present invention, Bottom plate is made of corrosion resistant polymer or glass material.
1) a kind of beneficial effect of the air-breathing paper base microfluid fuel cell of embedded anode of the present invention is: This patent is from reactant transmission is strengthened, and for the purpose of improving battery performance, anode is embedded in inside paper base runner by proposition, It avoids directly contacting with oxygen and causing oxidizing agent penetration;Utilize the wedge between the-anode-paper base runner lower part of paper base runner top Accelerate anode fuel local flow speed nearby, enhanced fuel mass transfer in shape gap;It is proposed using double/each layer in multi-ply paper base flow road it Between gap accelerate fluid-flow rate, strengthen reactant mass transfer.Battery performance is fired than paper base microfluid reported in the literature at present Material battery improves a lot.
2) air is directlyed adopt as oxidant, and cathode oxygen mass transfer is strengthened using air-breathing cathode.
3) the air-breathing paper base microfluid fuel cell of embedded anode proposed by the present invention and paper base microfluid analysis The material of chip is identical and manufacturing process highly compatible, it is easy to accomplish large-scale production and highly integrated.
The present invention can be widely used in the fields such as the energy.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the air-breathing paper base microfluid fuel cell of embedded anode of the present invention Figure.
Fig. 2 is the main body battery decomposition diagram of Fig. 1.
Fig. 3 is the B direction view of Fig. 2.
Fig. 4 is the C direction view of Fig. 2.
Fig. 5 is the schematic diagram in A-A direction of Fig. 3.
Fig. 6 is a kind of air-breathing paper base microfluid fuel battery performance figure of embedded anode of the present invention.
Specific embodiment
Technical solution of the present invention is described in more detail with specific implementation example with reference to the accompanying drawing.But it answers This points out, implementation of the invention embodiment not limited to the following.
Referring to Fig. 1 to Fig. 5, a kind of air-breathing paper base microfluid fuel cell of embedded anode, including air are exhaled certainly Inhale cathode 1, runner, anode 3 and bottom plate 5;The runner is set as " Y " type, and stacked by double-deck or multilayer paper base, respectively There are certain interval, principal flow passage of the gap as electrolyte and fuel between layer paper base;The air-breathing yin Pole 1 and anode 3 are separately positioned on runner two sides, and the anode 3 is made of hydrophilic electrode, and one end is embedded in runner in the horizontal direction It is interior, and wedge gap is formed with runner, in favor of accelerating fuel local velocity, enhanced fuel mass transfer;Flow path portion is embedded in anode 3 Set up separately and be equipped with Catalytic Layer, such as Pd Catalytic Layer;Air-breathing cathode 1 is arranged in the top of anode 3 and is located at the another of runner Side, one end of air-breathing cathode 1 are placed on above top layer paper base;The air-breathing cathode 1 is by hydrophobic porous electricity Pole is constituted, such as porous carbon paper;And top layer paper base contact portion is provided with Catalytic Layer, such as Pd Catalytic Layer, the Catalytic Layer towards Runner arrangement;The front end of the runner is provided with two imports, is separately connected electrolyte inlet 6 and fuel inlet 7, electrolyte into 6 setting of mouth is in 1 side of air-breathing cathode, and fuel inlet 7 is arranged in anode-side, and the rear end of the runner is connect with absorption pad 8; In the lower section of runner, bottom plate 5 is set.
In a particular embodiment, each layer paper base is made of Capillary-Porous Mediums such as cellulose chromatography filter papers.
The absorption pad 8 is made of the porous media with spontaneous imbibition ability.
The anode 3 is embedded in the horizontal direction " intersection of Y " type runner.
Bottom plate 5 is made of corrosion resistant polymer or glass material.
In a particular embodiment, can by double-deck or multilayer paper base by being divided into runner top 2 and runner lower part 4 up and down, Described 3 one end of anode is embedded in the horizontal direction between runner top 2 and runner lower part 4.
When it is implemented, potassium hydroxide solution can be used in electrolyte, the mixing of sodium formate and potassium hydroxide is can be used in fuel Solution.Fuel and electrolyte simultaneously in the gap between each layer of Capillary-Porous Medium and bilayer or multi-ply paper base flow road with Spontaneous passively mode flows, wherein the flowing velocity in gap is very fast.One end of anode 3 is embedded in bilayer or multilayer paper base stream Between road, fuel solution flows in the wedge gap that the periphery of anode 3 is formed with double/multi-ply paper base flow road, and flow velocity is very fast, has Conducive to enhanced fuel mass transfer.Anode side fuel is transmitted in a manner of convection-diffusion effect to the Catalytic Layer of anode 3.The sky of ambient enviroment Gas is spontaneous to diffuse to air-breathing cathode 1, and then fluid enters absorption pad 8, by its internal gas-liquid before being no longer entirely wetted The capillary pressure at interface maintains capillary flow in runner.
The anode 3 oxygenated fuel and can generate electronics and carbonate, in 1 reducing atmosphere of air-breathing cathode Oxygen and combine electronics and water to generate hydroxide ion.The catalyst such as the Pd on anode catalyst layer are to fuel such as sodium formates Electrocatalytic oxidation is carried out, carbanion, electronics and water are generated.Electronics reaches air-breathing yin through load by external circuit Pole 1, produces electricl energy.Oxygen in air is transmitted by hydrophobic porous structure to cathode catalysis layer, the catalyst such as Pt of cathode Electro-catalysis reduction is carried out to oxygen, generates hydroxide ion in conjunction with water and electron reaction.Hydroxide ion passes through electromigration mode Reach anode.Carbonate and waste liquid are absorbed by tail absorption pad.
It is a kind of air-breathing paper base miniflow fluid fuel of embedded anode of the present invention referring to Fig. 6 and table 1, Fig. 6 Battery performance figure.Table 1 is the performance comparison table of current paper base microfluid fuel cell reported in the literature and battery of the present invention.
Table 1
As it can be seen from table 1 paper base microfluid fuel cell maximum power density reported in the literature is 7.1mW/ at present cm2, and the air-breathing paper base microfluid fuel cell maximum power density of embedded anode proposed by the present invention is reachable 18.1mW/cm2.To show that the present invention can effectively enhanced fuel be transmitted, so that output power improves a lot.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this The range of invention is defined by the claims and their equivalents.

Claims (5)

1. a kind of air-breathing paper base microfluid fuel cell of embedded anode, including air-breathing cathode (1), runner, Anode (3) and bottom plate (5);It is characterized by: the runner is set as " Y " type, and stacked by double-deck or multilayer paper base, There are certain intervals between each layer paper base;The air-breathing cathode (1) and anode (3) are separately positioned on runner two sides, institute It states anode (3) to be made of hydrophilic electrode, one end is embedded in runner in the horizontal direction, and forms wedge gap with runner;In sun Pole (3) insertion runner section is provided with Catalytic Layer;Air-breathing cathode (1) is arranged the top in anode (3) and is located at runner The other side, one end of air-breathing cathode (1) is placed on above top layer paper base;The air-breathing cathode (1) is by dredging Aqueous porous electrode is constituted, and top layer paper base contact portion is provided with Catalytic Layer, which arranges towards runner;The stream The front end in road is provided with two imports, is separately connected electrolyte inlet (6) and fuel inlet (7), and electrolyte inlet (6) setting exists Air-breathing cathode (1) side, fuel inlet (7) are arranged in anode-side, and the rear end of the runner is connect with absorption pad (8);? Bottom plate (5) are arranged in the lower section of runner.
2. a kind of air-breathing paper base microfluid fuel cell of embedded anode according to claim 1, feature exist In: each layer paper base is made of Capillary-Porous Medium.
3. a kind of air-breathing paper base microfluid fuel cell of embedded anode according to claim 1, feature exist In: the absorption pad (8) is made of the porous media with spontaneous imbibition ability.
4. a kind of air-breathing paper base microfluid fuel cell of embedded anode according to claim 1 or 2 or 3, Be characterized in that: the anode (3) is embedded in the horizontal direction " intersection of Y " type runner.
5. a kind of air-breathing paper base microfluid fuel cell of embedded anode according to claim 4, feature exist In: bottom plate (5) is made of corrosion resistant polymer or glass material.
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CN110459789A (en) * 2019-09-06 2019-11-15 重庆大学 The sub-thread electrolyte microfluid fuel cell of anode and cathode down current arrangement
CN110600751A (en) * 2019-10-24 2019-12-20 重庆大学 Direct formate microfluid fuel cell with cotton wire electrode
CN110739466A (en) * 2019-09-03 2020-01-31 西安交通大学 Bipolar plate of fuel cell and fuel cell
CN110797560A (en) * 2019-11-08 2020-02-14 重庆大学 Miniature membraneless liquid fuel cell with hydrogel solid electrolyte
CN110808393A (en) * 2019-11-08 2020-02-18 重庆大学 Detachable and packaging pressure-adjustable hydrogel liquid storage and supply type membrane-free fuel cell
CN111030418A (en) * 2019-12-03 2020-04-17 广州大学 Double-cavity micropump based on electrowetting phenomenon
CN111916809A (en) * 2020-07-14 2020-11-10 江苏理工学院 Self-suction paper-based microfluid fuel cell stack
CN111952622A (en) * 2020-08-19 2020-11-17 重庆大学 Single-channel flow-through laminated electrode microfluid fuel cell
CN112190399A (en) * 2020-10-27 2021-01-08 天津大学 Intelligent diaper using paper-based microfluid fuel cell stack as self-power supply
CN112563514A (en) * 2020-12-03 2021-03-26 江苏理工学院 Self-suction type microfluid fuel cell based on paper-wrapped electrode
CN112751053A (en) * 2019-10-30 2021-05-04 武汉轻工大学 Flexible microfluid photoelectric fuel cell
CN114156499A (en) * 2021-10-12 2022-03-08 天津大学 Paper-based microfluid fuel cell embedded with cotton wires

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Publication number Priority date Publication date Assignee Title
CN110739466B (en) * 2019-09-03 2021-01-15 西安交通大学 Bipolar plate of fuel cell and fuel cell
CN110739466A (en) * 2019-09-03 2020-01-31 西安交通大学 Bipolar plate of fuel cell and fuel cell
CN110459789A (en) * 2019-09-06 2019-11-15 重庆大学 The sub-thread electrolyte microfluid fuel cell of anode and cathode down current arrangement
CN110600751A (en) * 2019-10-24 2019-12-20 重庆大学 Direct formate microfluid fuel cell with cotton wire electrode
CN112751053B (en) * 2019-10-30 2022-03-29 武汉轻工大学 Flexible microfluid photoelectric fuel cell
CN112751053A (en) * 2019-10-30 2021-05-04 武汉轻工大学 Flexible microfluid photoelectric fuel cell
CN110808393A (en) * 2019-11-08 2020-02-18 重庆大学 Detachable and packaging pressure-adjustable hydrogel liquid storage and supply type membrane-free fuel cell
CN110797560A (en) * 2019-11-08 2020-02-14 重庆大学 Miniature membraneless liquid fuel cell with hydrogel solid electrolyte
CN111030418B (en) * 2019-12-03 2021-04-02 广州大学 Double-cavity micropump based on electrowetting phenomenon
CN111030418A (en) * 2019-12-03 2020-04-17 广州大学 Double-cavity micropump based on electrowetting phenomenon
CN111916809A (en) * 2020-07-14 2020-11-10 江苏理工学院 Self-suction paper-based microfluid fuel cell stack
CN111952622A (en) * 2020-08-19 2020-11-17 重庆大学 Single-channel flow-through laminated electrode microfluid fuel cell
CN112190399A (en) * 2020-10-27 2021-01-08 天津大学 Intelligent diaper using paper-based microfluid fuel cell stack as self-power supply
CN112563514A (en) * 2020-12-03 2021-03-26 江苏理工学院 Self-suction type microfluid fuel cell based on paper-wrapped electrode
CN114156499A (en) * 2021-10-12 2022-03-08 天津大学 Paper-based microfluid fuel cell embedded with cotton wires
CN114156499B (en) * 2021-10-12 2023-06-23 天津大学 Paper-based micro-fluid fuel cell embedded with cotton thread

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