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Solid oxide electrolytic cell and preparation method thereof

A solid oxide and electrolytic cell technology, applied in electrolytic components, electrolytic process, electrodes, etc., can solve the problems of battery performance degradation, low open circuit potential, low oxygen ion conductivity, etc., to avoid high temperature sintering, good uniformity, The effect of operational reliability

Active Publication Date: 2022-02-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, doped zirconia materials are commonly used SOEC electrolyte materials, but their low oxygen ion conductivity at low temperatures leads to a significant decrease in battery performance.
Doped cerium oxide material has higher oxygen ion conductivity at low temperature, but it has a certain electronic conductivity, which causes the open circuit potential (OCV) of the battery to be lower than the theoretical value, reducing the battery efficiency

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] A solid oxide electrolytic cell comprises successively a hydrogen electrode layer, an electrolyte layer, an electron barrier layer, an interlayer, and an oxygen electrode layer, and its hydrogen electrode is 1g, wherein NiO and Gd 0.2 Ce 0.8 o 2 0.5g respectively, the thickness of the hydrogen electrode layer is 1000 nm, the porosity is 45%, and the electrolyte is Gd 0.2 Ce 0.8 o 2 , the thickness of the electrolyte layer is 10 microns, and the material of the electron blocking layer is Y 0.15 Zr 0.85 o 2 , the thickness of the electron blocking layer is 100 nm, and the interlayer material is Gd 0.2 Ce 0.8 o 2 , the thickness of the interlayer is 1 μm, and the oxygen electrode is La0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 -Gd 0.2 Ce 0.8 o 2 , with a mass of 0.01g, where La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 0.006g, Gd 0.2 Ce 0.8 o 2 The thickness of the oxygen electrode layer is 50 microns, and the porosity of the oxygen electrode layer is 50%. At 550°C, when the ...

Embodiment 2

[0029] A solid oxide electrolytic cell comprises successively a hydrogen electrode layer, an electrolyte layer, an electron barrier layer, an interlayer, and an oxygen electrode layer, and its hydrogen electrode is 1g, wherein NiO and Gd 0.2 Ce 0.8 o 2 0.5g respectively, the thickness of the hydrogen electrode layer is 1000 nm, the porosity is 45%, and the electrolyte is Gd 0.2 Ce 0.8 o 2 , the thickness of the electrolyte layer is 10 microns, and the material of the electron blocking layer is Y 0.15 Zr 0.85 o 2 , the thickness of the electron blocking layer is 100 nm, and the interlayer material is Gd 0.2 Ce 0.8 o 2 , the thickness of the interlayer is 1 μm, and the oxygen electrode is La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 -Gd 0.2 Ce 0.8 o 2 , with a mass of 0.01g, where La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 0.006g, Gd 0.2 Ce 0.8 o 2 The thickness of the oxygen electrode layer is 50 microns, and the porosity of the oxygen electrode layer is 50%.

[0030] The abov...

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Abstract

The invention discloses a low-temperature solid oxide electrolytic cell and a preparation method thereof. The electrolytic cell comprises a hydrogen electrode layer, an electrolyte layer, an electron barrier layer, an interlayer and an oxygen electrode layer, wherein the hydrogen electrode layer is a composite material composed of NiO and doped cerium oxide LnxCe<1-x>O2, the electrolyte layer is a doped cerium oxide-based material LnxCe<1-x>O2, Ln is one or more of La, Gd, Sm, Pr and Er, x is greater than or equal to 0.1 and less than or equal to 0.5, the electron barrier layer is a doped zirconia-based material MyZr<1-y>O2, M is one or more of Y, Sc, Ce, Yb, La, Gd and Sm, y is greater than or equal to 0 and less than or equal to 0.5, the interlayer is doped cerium oxide LnxCe<1-x>O2, Ln is one or more of La, Gd, Sm, Y, Pr and Er, x is greater than or equal to 0.1 and less than or equal to 0.5, and the oxygen electrode is a composite material composed of a perovskite oxide, a perovskite-like oxide or a perovskite oxide and doped cerium oxide or a perovskite-like oxide and doped cerium oxide. The electrolytic cell disclosed by the invention has excellent performance of producing hydrogen by electrolyzing water at low temperature and supplying electrolytic water and carbon dioxide.

Description

technical field [0001] The invention relates to the field of fuel cells and electrolytic cells, in particular to a solid oxide electrolytic cell and a preparation method thereof. Background technique [0002] Solid Oxide Electrolysis Cell (SOEC) can be regarded as the reverse process of solid oxide fuel cell, which can electrolyze water vapor into hydrogen and oxygen at high temperature, or electrolyze water vapor and carbon dioxide into synthesis gas. Its apparent electrical efficiency can reach 100%, and it is currently considered to be the most efficient electrolytic hydrogen production technology. [0003] High cost is an important reason hindering the commercial application of solid oxide fuel cells or electrolytic cells. In order to reduce the cost, the low temperature of solid oxide fuel cells or electrolytic cells has become a research hotspot in this field. Membrane electrode is the core component of SOEC, which has a "sandwich" structure with a dense electrolyte ...

Claims

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Application Information

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IPC IPC(8): C25B9/60C25B11/04C25B1/04
CPCC25B9/60C25B11/04C25B1/04Y02E60/36Y02E60/50
Inventor 赵哲邵志刚程谟杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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