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

A solid oxide and fuel cell technology, applied in the direction of fuel cells, battery electrodes, circuits, etc., can solve the problems of coating stability, battery high temperature operation cannot be guaranteed, increase processing procedures, reduce production efficiency, etc., and achieve easy automation , long-term stability and service life improvement, and high production efficiency

Active Publication Date: 2020-03-17
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 connecting electrode series tubular solid oxide fuel cell
  • Preparation method of double-layer connecting electrode series tubular solid oxide fuel cell

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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 preparation method of a double-layer connecting electrode series tubular solid oxide fuel cell. The preparation method comprises the following steps: preparing a continuous porous insulating layer on the outer surface of a metal ceramic supporting tube through plasma spraying; carrying out plasma spraying on the outer surface of the insulating layer according to a designed interval to prepare anode layers of a set number of single cells; carrying out plasma spraying on the outer surface of the anode layer to prepare an electrolyte layer to obtain a half cell; sprayingan inner connecting layer between the half cells, wherein the inner connecting layer is lapped on the outer surfaces of part of the electrolyte layers of the single cells on the two sides; preparingan outer connecting layer on the outer surface of the inner connecting layer, completely covering the inner connecting layer with the outer connecting layer, and extending to the electrolyte layers ofthe single cells on the two sides; a porous cathode layer is prepared on the outer surfaces of the electrolyte layer and the outer connecting layer through thermal spraying, and finally the tubular solid oxide fuel cell of the series structure is formed. The compact high-conductivity double-layer connecting electrode is prepared through thermal spraying, and the output power density and the long-term stability of the battery tube are improved.

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 Applications(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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