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Preparation method of double-layer junction electrode series tubular solid oxide fuel cell

A solid oxide, fuel cell technology, used in fuel cells, battery electrodes, circuits, etc., can solve the problems of high temperature operation of the coating stability battery, increase processing procedures, reduce production efficiency, etc., and achieve easy automation. , Long-term stability and service life improvement, the effect of high production efficiency

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These post-treatment processes increase the processing steps and reduce the production efficiency. Not only may it cause damage to other components of the battery, but the stability of the coating after treatment cannot be guaranteed during the high-temperature operation of the battery.

Method used

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  • Preparation method of double-layer junction electrode series tubular solid oxide fuel cell
  • Preparation method of double-layer junction electrode series tubular solid oxide fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The basic structure of SOFC battery tube adopts such as figure 1 As shown, when the SOFC battery tube is manufactured, the anode layer 3, the electrolyte layer 4, the inner connection layer 6, the outer connection layer 7 and the cathode layer 5 are sequentially prepared from the inside to the outside on the outer surface of the porous insulating layer 2, and the dense electrolyte layer is prepared After layer 4, sintered La 0.3 Sr 0.7 TiO 3 Powder is used as the material of the inner connection layer 6, the substrate is preheated to above 400°C, and a dense ceramic coating is prepared by plasma spraying at a power of 30kW, the inner connection layer 6 overlaps the electrolyte layer 4 by 1-5mm in the lateral direction, and the thickness is 150μm; then , using La 0.8 Sr 0.2 CrO 3 Powder, the substrate is preheated to above 500°C, and the dense outer connection layer 7 is plasma sprayed under 40kW power. The outer connection layer 7 completely covers the inner connec...

Embodiment 2

[0055] The basic structure of SOFC battery tube adopts such as figure 1 As shown, when manufacturing the SOFC battery tube, on the outer surface of the porous insulating layer 2, an anode layer 3, an electrolyte layer 4, an inner connection layer 6, an outer connection layer 7 and a cathode layer 5 are sequentially prepared from the inside to the outside. After preparing the dense electrolyte layer 4, the sintered La 0.3 Sr 0.7 TiO 3 Powder is used as the material of the inner connection layer 6, the substrate is preheated to above 400°C, and a dense ceramic coating is prepared by plasma spraying at a power of 30kW, the inner connection layer 6 overlaps the electrolyte layer 4 by 1-5mm in the lateral direction, and the thickness is 150μm; then , using La 0.8 Ca 0.2 CrO 3 Powder, the substrate is preheated to above 450°C, and the dense outer connection layer 7 is plasma sprayed under 38kW power. The outer connection layer 7 completely covers the inner connection layer 6 an...

Embodiment 3

[0057] The basic structure of SOFC battery tube adopts such as figure 1 As shown, when manufacturing the SOFC battery tube, on the outer surface of the porous insulating layer 2, an anode layer 3, an electrolyte layer 4, an inner connection layer 6, an outer connection layer 7 and a cathode layer 5 are sequentially prepared from the inside to the outside. After preparing the dense electrolyte layer 4, the sintered La 0.3 Sr 0.7 TiO 3 The powder is used as the material of the inner connection layer 6, the substrate is preheated to above 400°C, and a dense ceramic coating is prepared by plasma spraying at a power of 30kW, the inner connection layer 6 overlaps the electrolyte layer 4 by 1-5mm in the lateral direction, and the thickness is 200μm; then , using La 0.8 Sr 0.2 MnO 3 powder, the substrate is preheated to above 350°C, and the dense outer connection layer 7 is plasma sprayed at a power of 35kW. The outer connection layer 7 completely covers the inner connection laye...

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Abstract

The invention discloses a method for preparing a double-layer connected electrode series tubular solid oxide fuel cell, which comprises the following steps: preparing a continuous porous insulating layer by plasma spraying on the outer surface of a cermet support tube; Prepare the anode layer of a set number of single cells by plasma spraying; prepare the electrolyte layer on the outer surface of the anode layer by plasma spraying to obtain a half-cell; spray the inner connection layer between the half-cells, and the inner connection layer overlaps part of the electrolyte layer of the single cells on both sides Outer surface: prepare an outer connection layer on the outer surface of the inner connection layer, the outer connection layer completely covers the inner connection layer, and extends to the electrolyte layer of the single cells on both sides; thermal spraying on the outer surface of the electrolyte layer and the outer connection layer A porous cathode layer is prepared to finally form a tubular solid oxide fuel cell with a series structure. The invention prepares dense and high-conductivity double-layer connection poles through thermal spraying, which improves the output power density and long-term stability of the battery tube.

Description

technical field [0001] The invention belongs to the fields of energy and material processing, and relates to a preparation method of a high-temperature and high-conductivity metal-ceramic composite coating, in particular to a preparation method of a double-layer connection pole series tubular solid oxide fuel cell. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) is an energy conversion device that directly converts the chemical energy of fuel into electrical energy through electrochemical reactions. -70%, and the quality of waste heat is high, if the cogeneration of heat and power is realized reasonably, its energy utilization efficiency can reach 80-90%. SOFC fuel has wide adaptability and close to zero emission of pollutants. It is a clean and efficient ideal power generation system. [0003] At present, the SOFCs developed internationally mainly have two structures: planar and tubular. Flat-shaped SOFC generally consists ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0297H01M4/88H01M8/1246
CPCH01M4/886H01M8/0297H01M8/1246Y02E60/50
Inventor 李长久陈旭张山林李成新杨冠军
Owner XI AN JIAOTONG UNIV
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