A testing device and method for a thin-film electrode of a solid oxide fuel cell

A solid oxide and thin film electrode technology, applied in the field of electrochemical testing, can solve the problems of difficulty in meeting the testing requirements of medium and high temperature solid oxide cathode thin film materials, and not equipped with probes for electrochemical performance testing, so as to prevent damage to current collectors. Layers, space-saving, evenly distributed effects

Active Publication Date: 2020-12-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the current commercial microprobe heating platform (hereinafter referred to as "hot platform") usually operates at a temperature of 600 °C or below, which is difficult to meet the testing requirements of medium and high temperature solid oxide cathode thin film materials, while those that can operate at temperatures above 600 °C The high-temperature hot stage is usually not equipped with probes for electrochemical performance testing; in addition, due to the small volume of the film material, its thickness is only nanometers, and the surface is only micrometers, but the test accuracy is very high, and it is necessary to test the thin film electrode. The surface is precisely processed to improve its electron transport performance and ensure the effective progress of related reactions in electrochemical tests

Method used

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  • A testing device and method for a thin-film electrode of a solid oxide fuel cell
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  • A testing device and method for a thin-film electrode of a solid oxide fuel cell

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Experimental program
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Effect test

Embodiment 1

[0058] 1) Fix the comb-shaped hollow mask 11 above the 5mm*5mm snap hole in the middle of the front of the clip 10 with conductive glue, and prepare a thin film sample Nd with a size of 5mm*5mm*1mm prepared by the pulsed laser deposition method. 0.5 Sr 0.5 CoO 3-δ -Zr 0.92 Y 0.08 o 2 (hereinafter referred to as NSC-YSZ) from the back of the clamping piece 10 into the clamping hole in the middle of the clamping piece, so that the sample surface is facing the mask side, and the glass bottom plate 9 is assembled; the collector layer spraying mold 7 is placed upwards. Put it into the gold spray tank 2, spray a layer of comb-shaped gold collector layer with a thickness of about 100nm on the surface of the film NSC-YSZ, the sputtering current is 5mA, and the total sputtering time is 100s;

[0059] 2) Apply a layer of platinum slurry evenly on the bottom of the film material NSC-YSZ, the thickness is about 0.3-0.5mm, and apply a little platinum slurry on the center of the comb ha...

Embodiment 2

[0063] 1) Fix the strip-shaped hollow mask 12 with conductive glue above the 5mm*5mm snap hole in the middle of the front of the snap-in sheet 10, and prepare a film sample Nd with a size of 4mm*4mm*1mm prepared by the pulsed laser deposition method. 0.5 Sr 0.5 CoO 3-δ -SrTiO 3 (hereinafter referred to as NSC-STO), from the back of the card position piece 10 into the card position hole of the corresponding size on the card position piece, so that the sample surface faces the mask side, and the glass bottom plate 9 is assembled; the collector layer spraying mold 7 faces Put it into the gold spray tank 2, and spray two strips of comb-shaped gold collector layers with a thickness of about 100nm on the surface of the thin film NSC-YSZ. The sputtering current is 5mA, and the total sputtering time is 100s; take out the collector layer Spray the thin film electrode sample in the mold, apply a little platinum slurry on the center of the two strip-shaped current collectors on the upp...

Embodiment 3

[0067] The difference between this embodiment and embodiment 2 is that the film sample tested is La 0.6 Sr 0.4 CoO 3-δ -SrTiO 3 (hereinafter referred to as LSC-STO), when conducting electrical tests, the temperature is stabilized at 700°C, and a mixed gas with an oxygen partial pressure of 10% is stably introduced into the heating chamber first, and the resistance value of the sample is recorded, and then through the three-way valve Quickly switch to a mixed gas with an oxygen partial pressure of 1%, record the change in the resistance value during this process until the resistance is stable again, record 1 point per second during the test, and the test results are as follows: Figure 7 shown. According to this test result, combined with the conductance relaxation method formula, the oxygen exchange rate on the surface of the thin film sample can be calculated.

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Abstract

The invention discloses test equipment and method of a film electrode of a solid oxide fuel cell, and belongs to the field of the electrochemistry test. The equipment comprises a high-temperature heating stage, an ohm meter, an electrochemical workstation, a current collection layer spraying mold and a probe test component; the current collection layer spraying mold comprises a glass baseplate, ablocking sheet, and a hollow masking sheet; the probe test component comprises a bevel probe and a plane spiral probe; the method comprises electrical test and electrochemical test, the film electrodecan be tested by using a test probe combination according to a specific test demand. Through the test equipment disclosed by the invention, the quick precise test of the electrical performance and the electrochemical performance of the film electrode in the temperature range of 600-1000 DEG C, and the test equipment has the features of being accurate in test, high in efficiency and space-saving.

Description

technical field [0001] The invention belongs to the field of electrochemical testing, and is especially suitable for testing the electrochemical performance of thin film materials in medium and high temperature environments. Background technique [0002] The medium-high temperature solid oxide fuel cell is an all-solid-state chemical power generation device that directly converts the chemical energy stored in the fuel and oxidant into electrical energy within the temperature range of 600-1000 ° C. Due to its environmental friendliness and high energy conversion efficiency , flexible energy access, strong adaptability, and cost competitiveness are widely considered to be a promising energy conversion technology. As an important part of solid oxide fuel cells, the cathode provides an electrochemical reaction site for the oxygen reduction reaction, and the optimization of cathode materials is a key link that affects the performance and further development of fuel cells. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04G01N27/26G01R27/02
Inventor 赵晨欢郑云李一枫张文强于波王建晨陈靖
Owner TSINGHUA UNIV
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