Preparation method of micro-miniature direct formic acid fuel cell based on mems technology

A formic acid fuel cell, micro-miniature technology, applied in fuel cell parts, fuel cells, battery electrodes, etc., can solve the problems of large overall size, complex structure, poor corrosion resistance, etc., to overcome corrosion and simplify the battery. Structure, anti-corrosion effect

Active Publication Date: 2017-07-25
XIAMEN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a micro-sized direct formic acid fuel cell based on MEMS technology. The prepared micro-sized direct formic acid fuel cell can overcome the complex structure, poor corrosion resistance and overall Problems such as large size

Method used

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  • Preparation method of micro-miniature direct formic acid fuel cell based on mems technology
  • Preparation method of micro-miniature direct formic acid fuel cell based on mems technology
  • Preparation method of micro-miniature direct formic acid fuel cell based on mems technology

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Embodiment Construction

[0026] see figure 1 , the structure of the micro-miniature direct formic acid fuel cell prepared in the present embodiment, comprising membrane electrode (MEA) 1, electrode-bearing PDMS flow field plate 2 with air channel 21, serpentine micro-flow channel 31 and inlet and outlet liquid The anode PDMS flow field plate 3 with an electrode channel 32, the aluminum cathode pressure plate 4 with an air channel 41, and the aluminum anode pressure plate 5 with a liquid inlet and outlet channel 51 are assembled together by bolting.

[0027] see figure 2 , Preparation of PDMS flow field plate with electrode cathode: (a) using oxidation, photolithography and anisotropic wet etching micromachining technology to fabricate a square boss array 1 with a boss size of 1600 μm × 1600 μm on a silicon wafer; (b) Put the silicon wafer into the cavity of the mold, spray the release agent and PDMS glue 2 (PDMS substrate: PDMS curing agent = 10:1), and embed the copper foil electrode 3 to cure afte...

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Abstract

The invention discloses a preparation method of a miniature direct formic acid fuel cell based on an MEMS technology, and relates to a direct formic acid fuel cell. The method comprises the following steps: fabricating a snakelike convex micro-channel and a square boss array on a silicon slice by a micromachining technology; assembling the processed silicon slice into a mold, injecting PDMS liquid cement, embedding a copper foil into an uncured PDMS material, curing and integrating the copper foil and the PDMS material, so as to obtain a cell cathode flow field plate of the PDMS material; sputtering Cr on a flow field area and the copper foil, and then sputtering Au to cover Cr, so as to obtain the cell cathode flow field plate with an electrode; obtaining the cell cathode flow field plate with the electrode by the same preparation method; carrying out hot-pressing on PEM sprayed with an anode catalyst and a cathode catalyst and carbon paper to prepare a membrane electrode; passivating the cut metal plate in concentrated sulfuric acid, sputtering the PTFE and carrying out anti-corrosion treatment, so as to obtain a metal cathode pressure plate; obtaining a metal cathode pressure plate by the same preparation method; and encapsulating to obtain the miniature direct formic acid fuel cell.

Description

technical field [0001] The invention relates to a direct formic acid fuel cell, in particular to a method for preparing a micro-miniature direct formic acid fuel cell based on MEMS technology. Background technique [0002] Proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC) is considered to be the most research value and application prospect in the research of various fuel cells. Among them, direct methanol fuel cell (directmethanol fuel cell, DMFC) is a hot spot in fuel cell research. Direct methanol fuel cells have the advantages of wide fuel sources, convenient storage and transportation, high energy conversion efficiency and strong reliability. However, studies have found that because methanol easily permeates Nafion membranes, DMFCs using Nafion membranes as proton exchange membranes can only use low-concentration (1-2mol / L) methanol solutions to maintain stable work. At the same time, the electrocatalytic oxidation rate of methanol is also ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/026H01M4/88H01M8/1011B81C1/00
CPCB81C1/00349H01M4/8875H01M8/02Y02E60/50Y02P70/50
Inventor 郭航王婷婷曾毅波陈观生
Owner XIAMEN UNIV
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