Micro membrane-free fuel cell with three-dimensional porous carbon electrode and preparation method thereof

A porous carbon electrode, fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of low fuel utilization rate and low power density, and achieve high fuel utilization rate and power density, large specific surface area, high efficiency Effects of Diffusion/Convective Mass Transport Properties

Inactive Publication Date: 2014-03-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of low fuel utilization rate and low power density of fuel cells in the prior art, the prese...

Method used

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  • Micro membrane-free fuel cell with three-dimensional porous carbon electrode and preparation method thereof

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Effect test

Embodiment 1

[0028] A micro-filmless fuel cell containing a three-dimensional porous carbon electrode is prepared by the following method, specifically comprising the following steps:

[0029] (1) Prepare metal electrode leads on the substrate:

[0030] 1.1 Prepare a layer of chromium metal film on the cleaned glass sheet (substrate) by magnetron sputtering method, and the chromium metal film is used as the lead wire of the carbon electrode. The process parameters of the magnetron sputtering method are: chamber pressure 0.6Pa, sputtering power 100W, argon flow rate 12cm 2 / min, sputtering time 2min;

[0031] 1.2 Use a coating machine to coat a layer of photoresist on the chromium metal film. The process parameters of coating are: low speed about 800rpm, time 6s, high speed 3500rpm, time 30s;

[0032] 1.3 Perform photolithography, development and other treatments on the photoresist, pattern the photoresist, so that the residual photoresist on the chromium metal film presents the required ...

Embodiment 2

[0039] A micro-filmless fuel cell containing a three-dimensional porous carbon electrode is prepared by the following method, specifically comprising the following steps:

[0040] (1) Prepare metal electrode leads on the substrate:

[0041] 1.1 Prepare a layer of chromium metal film on the cleaned silicon wafer (substrate) by magnetron sputtering method. The process parameters of magnetron sputtering method are: chamber pressure 0.5Pa, sputtering power 80W, argon flow rate 10cm 2 / min, sputtering time 3min;

[0042] 1.2 Use a coating machine to coat a layer of photoresist on the chromium metal film. The process parameters for coating are: low speed 700rpm, time 9s, high speed 3500rpm, time 20s;

[0043] 1.3 Perform photolithography, development and other treatments on the photoresist, pattern the photoresist, so that the residual photoresist on the chromium metal film presents the required electrode pattern, and then put it into the chromium etching solution to etch and remov...

Embodiment 3

[0050] A micro-filmless fuel cell containing a three-dimensional porous carbon electrode is prepared by the following method, specifically comprising the following steps:

[0051] (1) Preparing metal electrode leads on the substrate: same as Example 1;

[0052] (2) Loading carbon nanotubes on the metal electrode leads: deposit carbon nanotubes on the surface of the metal electrode leads by electrophoretic deposition, add 2g of carbon nanotubes to 1L of water, and prepare an aqueous solution of carbon nanotubes with a concentration of 2g / l. Apply a voltage of 1V and deposit for 10 hours to obtain carbon nanotubes supported on metal electrode leads, and the thickness of the carbon nanotubes is about 0.5mm;

[0053] (3) Catalyst loading on carbon nanotubes: soak the substrate loaded with metal electrode leads and carbon nanotubes in a solution containing chloroplatinic acid and silver nitrate for 18 hours, take it out at room temperature and dry it with hydrogen plasma Reduction...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a micro membrane-free fuel cell with a three-dimensional porous carbon electrode and a preparation method thereof. The surface of a metal electrode lead is loaded with a carbon nanotube with a certain-thickness or carbon fiber to form the three-dimensional porous carbon electrode, and then is bonded and packaged by a cover slip to prepare the micro membrane-free fuel cell. The fuel and oxidant of the fuel cell respectively penetrate the three-dimensional porous carbon electrode loaded with a catalyst in a penetrative mode to conduct oxidation and reduction reaction, and a reactant (fuel and oxidant) liquid flow has high-efficient diffusion/convection substance transmission characteristics during penetrating the three-dimensional electrode. Reactants near an electrode consumption boundary layer can obtain sustained and effective supplement, so that the reactant concentration at the electrode can maintain a certain value. Meanwhile, as the carbon nanotube or the carbon fiber are loose and porous and have large specific surface area and more reactivity areas, the micro fuel cell has high fuel availability and a high power density.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a micro-filmless fuel cell containing a three-dimensional porous carbon electrode and a preparation method thereof. Background technique [0002] With the development of science and technology, mobile electronic devices continue to be miniaturized, and the demand for miniature and efficient power supplies is increasing. Micro fuel cells have the advantages of high energy conversion efficiency, high specific power, high capacity, small size and environmental friendliness, which can meet the increasing energy demand of mobile electronic devices to a certain extent. With the increasing popularity of various mobile electronic devices, The demand for micro-fuel cells will become more prominent, and it is a potential technology. [0003] Micro-membrane fuel cell is a new type of micro-fuel cell without proton exchange membrane. It makes full use of the co-laminar flow p...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/88H01M8/00
CPCY02E60/50H01M4/8605H01M4/8825H01M4/8853H01M4/9083H01M4/921
Inventor 王升高许结林张维皮晓强李鹏飞孔垂雄王传新汪建华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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