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Rapid activation method for film electrode of proton exchange film fuel cell and application thereof

A fuel cell membrane and proton exchange membrane technology, applied in the disposal/recycling of fuel cells, fuel cells, battery recycling, etc., can solve the problem of long activation time and achieve the effect of improving activation efficiency

Active Publication Date: 2020-02-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing activation method has a long activation time, the present invention provides a rapid activation method and application of the membrane electrode of a proton exchange membrane fuel cell. State, the described rapid activation method is a continuous high-frequency variable voltage forced activation in which the voltage decreases linearly at a constant rate

Method used

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  • Rapid activation method for film electrode of proton exchange film fuel cell and application thereof
  • Rapid activation method for film electrode of proton exchange film fuel cell and application thereof
  • Rapid activation method for film electrode of proton exchange film fuel cell and application thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Make the active area 5 cm 2 The membrane electrode is assembled into the single cell fixture and connected to the test instrument. After checking the airtightness of the fixture, N is introduced into the cathode and anode. 2 Purge for 30 s. The working temperature was set at 80 °C, and air and hydrogen with a relative humidity of 100% were fed to the cathode and anode respectively, the stoichiometric ratio was 1.5, and the gas pressure was set to 0.1 MPa. After the temperature rose to 80 °C, the fuel cell was forced to activate with a constant rate of continuously variable voltage. The activation procedure was as follows: the voltage was increased from the open circuit voltage to 4 mV s -1 The constant rate linearly decreases to the preset low voltage value of 0.2 V. When the voltage of the single cell drops to 0.2 V, the current is quickly cut off, and the battery returns to the open circuit voltage ( figure 1 ). The above activation steps were repeated, and the pol...

Embodiment 2

[0024] Make the active area 5 cm 2 The membrane electrode is assembled into the single cell fixture and connected to the test instrument. After checking the airtightness of the fixture, N is introduced into the cathode and anode. 2 Purge for 30 s. The working temperature was set at 80 °C, and air and hydrogen with a relative humidity of 100% were fed to the cathode and anode respectively, the stoichiometric ratio was 1.5, and the working pressure of the gas was set to 0.1 MPa. After the temperature rose to 80 °C, the fuel cell was forced to activate with a constant rate of continuously variable voltage. The activation procedure was: the voltage was increased from the open circuit voltage to 10 mV s -1 The constant rate linearly decreases to a preset low voltage value of 0.2 V. When the cell voltage drops to 0.2 V, the current is quickly cut off, and the battery returns to the open circuit voltage. The above activation steps were repeated, and the polarization curve and power...

Embodiment 3

[0026] Make the active area 5 cm 2 The membrane electrode is assembled into the single cell fixture and connected to the test instrument. After checking the airtightness of the fixture, N is introduced into the cathode and anode. 2 Purge for 30 s. The working temperature was set at 80 °C, and air and hydrogen with a relative humidity of 100% were fed to the cathode and anode respectively, the stoichiometric ratio was 1.5, and the working pressure of the gas was set to 0.1 Mpa. After the temperature rose to 80 °C, the fuel cell was forced to activate with a constant rate of continuously variable voltage. The activation procedure was as follows: the voltage was increased from the open circuit voltage to 4 mV s -1 The constant rate linearly decreases to the preset low voltage value of 0.3 V. When the single cell voltage drops to 0.3 V, the current is quickly cut off, and the battery returns to the open circuit voltage. The above activation steps were repeated, and the polarizat...

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Abstract

The invention relates to a rapid activation method for a film electrode of a proton exchange film fuel cell and an application of the rapid activation method, and aims to enable the film electrode toreach an optimal state in a shorter time. The rapid activation method is continuous high-frequency variable-voltage forced activation in which voltage is linearly reduced at a constant rate. Comparedwith a constant-current activation mode in the prior art, an activation mode provided is simple and feasible, the activation time can be obviously shortened, and the activation mode has important significance for improving activation efficiency of the fuel cell, saving energy and reducing emission.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for rapidly activating membrane electrodes of proton exchange membrane fuel cells and an application thereof. The method can obviously shorten the time required for fuel cell activation. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an energy conversion device that directly converts chemical energy in fuel into electrical energy through electrochemical reactions. choose. PEMFC single cell consists of membrane electrode assembly, bipolar plate, current collector and end plate, among which the membrane electrode component (composed of proton exchange membrane, catalytic layer and gas diffusion layer) is the key to the fuel cell. When the fuel cell is first assembled, the proton conduction is hindered due to the lack of water inside the proton exchange membrane and the catalytic layer. Therefore, in order to quickly construct a reasonable ...

Claims

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Application Information

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IPC IPC(8): H01M8/008H01M8/04223H01M8/1004
CPCH01M8/008H01M8/04223H01M8/1004Y02E60/50Y02W30/84
Inventor 王峰李宁窦美玲王琨
Owner BEIJING UNIV OF CHEM TECH
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