CN107195922B - Bendable microfluid membraneless fuel cell - Google Patents

Bendable microfluid membraneless fuel cell Download PDF

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Publication number
CN107195922B
CN107195922B CN201710317233.8A CN201710317233A CN107195922B CN 107195922 B CN107195922 B CN 107195922B CN 201710317233 A CN201710317233 A CN 201710317233A CN 107195922 B CN107195922 B CN 107195922B
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fuel cell
cover plate
microfluid
bendable
flow channel
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CN107195922A (en
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李丽
贝绍轶
李波
万超一
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Jiangsu University of Technology
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Jiangsu University of Technology
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    • 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
    • H01M8/0204—Non-porous and characterised by the material
    • H01M8/0221—Organic resins; Organic polymers
    • 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
    • H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
    • H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
    • 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
    • H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • 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)
  • Composite Materials (AREA)
  • Fuel Cell (AREA)
  • Inert Electrodes (AREA)

Abstract

The invention provides a bendable microfluid membrane-free fuel cell, which comprises a microfluid membrane-free fuel cell main body, wherein the microfluid membrane-free fuel cell main body is formed by hot-pressing and packaging a partition plate and an upper cover plate and a lower cover plate which cover the partition plate, a rectangular fluid flow channel is arranged on the partition plate, an inlet and an outlet of reaction liquid are arranged on the upper cover plate, a metal layer is deposited on the inner surface of the lower cover plate and is used as a metal electrode, and the metal electrode is connected with an external lead wire and used for leading out electric energy generated in the fuel cell for being used by an external circuit load. The bendable microfluid membraneless fuel cell provided by the invention utilizes a PVC sheet with good bending performance as a main material, adopts an extremely thin metal layer firmly adhered to the surface of the PVC sheet as a metal electrode, adopts an opposite flow channel design to reduce the area of a contact interface between cathode and anode reaction liquid, can keep stable output performance in different bending states, and can effectively meet the energy requirement of special-shaped electronic products.

Description

Bendable microfluid membraneless fuel cell
Technical Field
The invention relates to the technical field of fuel cells, in particular to a bendable microfluid membraneless fuel cell.
Background
Along with portable electronic equipment's development and popularization, special-shaped electronic products such as intelligent bracelet, intelligent glasses, arc cell-phone, intelligent wearable equipment constantly appear. How to satisfy the energy requirements of the special-shaped electronic products without changing the appearance of the special-shaped electronic products is one of the problems to be solved in the field of portable electronic equipment.
Among various micro power supplies, the micro-fluid membraneless fuel cell utilizes the characteristic of parallel laminar flow of fluid in a micro channel to isolate fuel and oxidant, avoids the need of using a proton exchange membrane, and has a series of advantages of cleanness, high efficiency, simple structure, low cost and the like, thereby being widely concerned.
Currently, the developed microfluidic membraneless fuel cell mostly adopts glass as a substrate material, Polydimethylsiloxane (PDMS) as a cover plate material, or polymethyl methacrylate (PMMA) as a main body material, but both glass and PMMA have no flexibility. In addition, in the current flow channel design of the microfluid membraneless fuel cell, the contact interface between the anolyte and the catholyte is large when the anolyte and the catholyte flow in parallel laminar flows in the microchannel, and even if the cell material has flexibility, the contact interface between the anolyte and the catholyte can be greatly disturbed when the cell is bent, so that the cell performance is poor, and the energy requirement of special-shaped electronic products can not be met.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a bendable microfluid membrane-free fuel cell, which is used for solving the problem that the conventional microfluid membrane-free fuel cell cannot be bent and is limited in application in special-shaped electronic products.
The invention provides a bendable microfluid membrane-free fuel cell, which comprises a microfluid membrane-free fuel cell main body, wherein the microfluid membrane-free fuel cell main body is formed by hot-pressing and packaging a partition plate and an upper cover plate and a lower cover plate which cover the partition plate, a rectangular fluid flow channel is arranged on the partition plate, an inlet and an outlet of reaction liquid are arranged on the upper cover plate, a metal layer is deposited on the inner surface of the lower cover plate and is used as a metal electrode, and the metal electrode is connected with an external lead wire and used for leading out electric energy generated in the fuel cell for being used by an external circuit load.
Furthermore, the material of the partition plate and the cover plate is a PVC sheet with good bending property, and the thickness of the PVC sheet is 0.5 mm.
Furthermore, a rectangular through groove is formed in the partition plate to serve as a fluid flow channel, the length of the flow channel is 13mm, and the width of the flow channel is 1 mm.
Furthermore, the upper cover plate is provided with through holes as an inlet and an outlet of the reaction liquid, the through holes are positioned above the fluid flow channel, the left through hole and the right through hole are respectively an inlet of the anode liquid and an inlet of the cathode liquid, and the middle through hole is an outlet of the reaction liquid.
Furthermore, two rectangular titanium-platinum bimetallic layers with the length of 5mm and the width of 1mm are deposited on the lower cover plate and respectively used as the anode and the cathode of the fuel cell, wherein the titanium layer is an adhesion layer and the thickness of the titanium layer is 5 nm; the platinum layer is a catalytic layer and has a thickness of 50 nm.
Further, the anode and the cathode are embedded at symmetrical positions on both sides of the lower side of the fluid flow channel with a spacing of 1 mm. The anode and the cathode are connected with an external lead, and the joint is connected by carbon paste and silver paste to lead out electric energy generated in the fuel cell for external circuit load.
Has the advantages that: the invention adopts the PVC sheet with excellent bending property as the main material of the microfluid membraneless fuel cell, and realizes the flexibility of the cell main body; depositing an extremely thin titanium-platinum double-metal layer on the surface of the PVC sheet as a metal electrode, and enhancing the adhesion of the metal electrode on the surface of the PVC sheet by using the titanium layer to realize the flexibility of the electrode; the design of the opposite-impact flow channel is adopted, the contact interface between the anolyte and the catholyte is reduced, the influence of the change of the battery shape on the contact interface between the anode and cathode reaction liquid is reduced, and the flexibility of the fluid flow channel is realized.
The bendable microfluid membraneless fuel cell provided by the invention utilizes a PVC sheet with good bending performance as a main material, adopts an extremely thin metal layer firmly adhered to the surface of the PVC sheet as a metal electrode, adopts an opposite flow channel design to reduce the area of a contact interface between cathode and anode reaction liquid, can keep stable output performance in different bending states, and can effectively meet the energy requirement of special-shaped electronic products.
Drawings
FIG. 1 is a diagram of the assembly mechanism of a flexible microfluidic membraneless fuel cell of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of a metal electrode deposited on the lower cover plate of a flexible microfluidic membraneless fuel cell according to the present invention;
fig. 3 is a schematic longitudinal cross-section of a bendable microfluidic membraneless fuel cell of the present invention.
The labels in the figures are: 1. the device comprises a lower cover plate, 2, a partition plate, 2-1, a fluid flow channel, 3, an upper cover plate, 3-1, an anolyte inlet, 3-2, a catholyte inlet, 3-3, a reaction liquid outlet, 4, a metal electrode, 4-1, a titanium layer in the metal electrode, 4-2, a platinum layer in the metal electrode, 5, an external lead, 6, anolyte, 7, catholyte, 67 and a cathode-anode reaction liquid contact interface.
Detailed Description
In fig. 1, the bendable microfluidic membraneless fuel cell body of the present invention comprises a separator 2 and two cover plates 1 and 3 covering the separator. The main material is a PVC sheet with good bending property, and the thickness of the PVC sheet is 0.5 mm. A rectangular through groove (13 mm in length and 1mm in width) is formed in the partition plate 2 to serve as a fluid flow channel 2-1, three circular through holes (0.25 mm in radius) are formed in the upper cover plate 3 to serve as an inlet and an outlet of reaction liquid, the through holes are located above the fluid flow channel, the through hole in the left side is an inlet 3-1 of anolyte 6, the through hole in the right side is an inlet 3-2 of catholyte 7, and the through hole in the middle is an outlet 3-3 of the reaction liquid. Two rectangular titanium-platinum bimetallic layers (5 mm in length and 1mm in width) are deposited on the inner surface of the lower cover plate 1 and used as metal electrodes 4, and the two metal electrodes are embedded in symmetrical positions at two sides of the lower side of the fluid flow channel at an interval of 1 mm. The metal electrode 4 is connected with an external lead 5, and the joint is connected by carbon paste and silver paste for leading out electric energy generated in the fuel cell for external circuit load.
In fig. 2, a titanium-platinum bimetallic layer is deposited on the inner surface of the lower cover plate 1 as the metal electrode 4, and the preparation method of the metal electrode 4 comprises the following steps:
(1) covering a layer of PVC mask on all non-electrode areas on the inner surface of the lower cover plate 1;
(2) depositing a titanium layer with the thickness of 5nm on the inner surface of the lower cover plate 1 by an electron beam evaporation technology, and then depositing a platinum layer with the thickness of 50 nm;
(3) and removing the mask covered on the lower cover plate 1 to obtain the metal electrode 4 with a specific size and shape.
In fig. 3, the bendable microfluidic membraneless fuel cell of the present invention is formed by thermocompression-packaging a separator 2 with two cover plates 1 and 3 covering the separator. During operation of the cell, anolyte 6 and catholyte 7 enter the cell from the anolyte and catholyte inlets, respectively, and meet at a location intermediate the fluid flow paths after passing through the anode and cathode, respectively, in the fluid flow paths. Due to the micro-scale laminar flow effect and diffusion control, a narrow liquid interface 67 is automatically formed at the interface of the anode liquid and the cathode liquid after meeting, and then the anode liquid and the cathode liquid flow upwards through a reaction liquid outlet in a parallel laminar flow flowing mode and flow out of the cell.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.

Claims (6)

1. A bendable microfluid membrane-free fuel cell is characterized by comprising a microfluid membrane-free fuel cell main body, wherein the microfluid membrane-free fuel cell main body is formed by hot-pressing and packaging a partition plate and an upper cover plate and a lower cover plate which cover the partition plate, a rectangular fluid flow channel is formed in the partition plate, an inlet and an outlet of reaction liquid are arranged on the upper cover plate, a metal layer is deposited on the inner surface of the lower cover plate and serves as a metal electrode, and the metal electrode is connected with an external lead to lead out electric energy generated in the fuel cell for being used by an external circuit load;
the partition plate and the cover plate are made of PVC sheets, and the thickness of the partition plate and the cover plate is 0.5 mm.
2. The flexible microfluidic membraneless fuel cell according to claim 1, wherein the separator has rectangular through channels as fluid channels, the channels having a length of 13mm and a width of 1 mm.
3. The bendable microfluidic membraneless fuel cell according to claim 1, wherein the upper cover plate is provided with a through hole as an inlet and an outlet of the reaction solution, the through hole is located above the fluid flow channel, the left and right through holes are inlets of the anode solution and the cathode solution, respectively, and the middle through hole is an outlet of the reaction solution.
4. The bendable microfluidic membraneless fuel cell according to claim 1, wherein two rectangular titanium-platinum bimetallic layers with a length of 5mm and a width of 1mm are deposited on the lower cover plate to serve as an anode and a cathode of the fuel cell, respectively, wherein the titanium layer is an adhesion layer and has a thickness of 5 nm; the platinum layer is a catalytic layer and has a thickness of 50 nm.
5. The flexible microfluidic membraneless fuel cell according to claim 4, wherein the anode and cathode are embedded in the fluid flow channel at symmetrical positions on both sides of the underside of the fluid flow channel with a spacing of 1 mm.
6. The flexible microfluidic membraneless fuel cell according to claim 5, wherein the anode and the cathode are connected to external leads, and the connection is made by carbon paste and silver paste to extract electric energy generated in the fuel cell for external circuit loads.
CN201710317233.8A 2017-05-08 2017-05-08 Bendable microfluid membraneless fuel cell Active CN107195922B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108417855A (en) * 2018-04-08 2018-08-17 江苏理工学院 A kind of microfluid fuel cell with right-angled trapezium porous electrode
CN109860651B (en) * 2019-01-25 2020-10-30 江苏理工学院 High-performance radial microfluid fuel cell
CN110112423B (en) * 2019-04-08 2024-02-09 华南理工大学 Microchannel circulating flow type pulse electrodeposition device for preparing platinum-based core-shell structure catalyst and application method thereof
CN112751053B (en) * 2019-10-30 2022-03-29 武汉轻工大学 Flexible microfluid photoelectric fuel cell

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103066311A (en) * 2012-12-11 2013-04-24 华东理工大学 Self-driven type micro-fluid membrane less fuel cell based on gravity effects
CN103268945A (en) * 2013-07-02 2013-08-28 成都赢创科技有限公司 Bipolar electrode for flow battery and manufacturing process thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103066311A (en) * 2012-12-11 2013-04-24 华东理工大学 Self-driven type micro-fluid membrane less fuel cell based on gravity effects
CN103268945A (en) * 2013-07-02 2013-08-28 成都赢创科技有限公司 Bipolar electrode for flow battery and manufacturing process thereof

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