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Based on ag-srtio 3 Symmetric sofc of electrode and preparation method thereof

An electrode and symmetric technology, applied in the field of solid oxide fuel cells, can solve the problems of battery performance degradation, complex processing of battery components, and different performance requirements, and achieve a method that is believed to be feasible, guarantees uniform stability, and has simple equipment requirements. Effect

Active Publication Date: 2020-08-11
淮南市通霸蓄电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the different working environments of SOFC anodes and cathodes, their performance requirements are also different. For example, the anode material is required to be stable in a reducing atmosphere, the cathode material is required to be stable in an oxidizing atmosphere, and both anode and cathode are required to have certain Conductivity, strength, etc. At present, for SOFC with asymmetric structure, the main problem is that when carbon-containing fuel is used, carbon deposition at the anode will lead to rapid degradation of battery performance, and at the same time, the increase in battery composition materials also brings processing. the complexity of

Method used

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  • Based on ag-srtio <sub>3</sub> Symmetric sofc of electrode and preparation method thereof
  • Based on ag-srtio <sub>3</sub> Symmetric sofc of electrode and preparation method thereof
  • Based on ag-srtio <sub>3</sub> Symmetric sofc of electrode and preparation method thereof

Examples

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Embodiment 1

[0047] A Ag-SrTiO based 3 A symmetrical SOFC with electrodes, including an electrolyte, a cathode and an anode, the cathode and the anode are respectively coated on both sides of the electrolyte, and the electrolyte is Ce 0.8 Gd 0.2 o 1.9 (GDC), the cathode and the anode are both Ag-SrTiO 3 electrode, the Ag-SrTiO 3 The electrode is powdered Ag-SrTiO 3 As raw material, the powder Ag-SrTiO 3 According to the mass ratio of silver to the metal element is 5wt% to make Ag + It is obtained by modifying STO with nano-Ag particles.

[0048] The Ag-SrTiO-based 3 The preparation method of the symmetrical SOFC of electrode, comprises the following steps:

[0049] (1) Preparation of powder

[0050] (1) Preparation of STO powder by citric acid self-propagating combustion method: Weigh a certain amount of Sr(NO 3 ) 3 In a beaker, dissolve it with deionized water and add the corresponding volume of butyl titanate, then add citric acid, the ratio of citric acid to metal ion substan...

Embodiment 2

[0060] A Ag-SrTiO based 3 A symmetrical SOFC with electrodes, including an electrolyte, a cathode and an anode, the cathode and the anode are respectively coated on both sides of the electrolyte, and the electrolyte is Ce 0.8 Gd 0.2 o 1.9 (GDC), the cathode and the anode are both Ag-SrTiO 3 electrode, the Ag-SrTiO 3 The electrode is powdered Ag-SrTiO 3 As raw material, the powder Ag-SrTiO 3 According to the mass ratio of silver to the metal element being 10wt%, the Ag + It is obtained by modifying STO with nano-Ag particles.

[0061] The Ag-SrTiO-based 3 The preparation method of the symmetric SOFC of the electrode, except that in step (2) according to the mass ratio of silver to the metal element is 10wt% to modify the STO, sintering to obtain powder Ag-SrTiO 3 Outside, other is with embodiment 1.

Embodiment 3

[0063] A Ag-SrTiO based 3 A symmetrical SOFC with electrodes, including an electrolyte, a cathode and an anode, the cathode and the anode are respectively coated on both sides of the electrolyte, and the electrolyte is Ce 0.8 Gd 0.2 o 1.9 (GDC), the cathode and the anode are both Ag-SrTiO 3 electrode, the Ag-SrTiO 3 The electrode is powdered Ag-SrTiO 3 As raw material, the powder Ag-SrTiO 3 According to the mass ratio of silver to metal elements is 15wt% to make Ag + It is obtained by modifying STO with nano-Ag particles.

[0064] This embodiment is based on Ag-SrTiO 3 The preparation method of the symmetric SOFC of the electrode, except that in step (2) according to the mass ratio of silver accounting for metal elements is 15wt% to modify STO, sintering to obtain powder Ag-SrTiO 3 Outside, other is with embodiment 1.

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Abstract

The invention provides an Ag-SrTiO3 electrode-based symmetric solid oxide fuel cell (SOFC). The Ag-SrTiO3 electrode-based symmetric SOFC comprises an electrolyte, a negative electrode and a positive electrode, wherein the negative electrode and the positive electrode are respectively coated at two sides of the electrolyte, the electrolyte is Ce<0.8>Gd<0.2>O<1.9> (GDC), the negative electrode and the positive electrode both are Ag-SrTiO3 electrodes, the Ag-SrTiO3 electrodes take powder Ag-SrTiO3 as a raw material, and the powder Ag-SrTiO3 is obtained by reducing Ag<+> in which the mass ratio ofAg accounts for 5-20wt% of a metal element to nanometer Ag particles and modifying STO. In the Ag-SrTiO3 electrode-based symmetric SOFC, the electrodes are loosen and are porous, and favorable contact between the electrodes and the electrolyte is achieved. The invention also provides a preparation method of the Ag-SrTiO3 electrode-based symmetric SOFC. The preparation method comprises the following steps of (1) powder preparation; (2) symmetric electrode preparation; and (3) single battery assembly.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, in particular to an Ag-SrTiO-based 3 Electrode symmetric SOFC and its preparation method. Background technique [0002] Solid oxide fuel cell (SOFC) is an all-solid component energy conversion device that can directly and continuously convert the chemical energy in fuel and oxidant into electrical energy. Among various fuel cells, solid oxide fuel cell has a system structure It has unique advantages such as simplicity, high power conversion efficiency, environmental friendliness, wide range of applicable fuels and long life. It has wide application prospects in large, medium and small power stations, mobile and portable power supplies, as well as military, aerospace and other fields, and is recognized as a new power generation technology with good development prospects. Although SOFC technology has made significant progress, there is still a lot of work to be done to achieve comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/12H01M4/86H01M4/88B82Y30/00
CPCB82Y30/00H01M4/86H01M4/8605H01M4/88H01M8/10H01M2008/1293Y02E60/50
Inventor 全桂英陈钉宋雨蔷张晶晶田冬
Owner 淮南市通霸蓄电池有限公司
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