A Zirconium-Based Anode-Supported Solid Oxide Battery Without a Separator

A solid oxide, anode support technology, used in fuel cells, battery electrodes, electrodes, etc., can solve the problem of insufficient cathode modification, high temperature of preparation process, Sr segregation, inability to guarantee compactness and battery life, and cathode materials. Coarse microstructure and other problems, to achieve the effect of reducing oxygen ion migration paths, good performance, and reducing preparation costs

Active Publication Date: 2021-10-08
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cathode structure prepared by mechanical mixing and sintering of the powder has shortcomings such as the microstructure of the cathode material is too coarse, the dispersion is poor, and a high sintering temperature (greater than 1300 ℃) is required.
In addition, most of the current research on the cathode coating structure is dispersed nanoparticle coating, which cannot form a continuous film coating structure; and it is directly prepared on the Sr-containing perovskite cathode skeleton, and the electrolyte and Sr-containing perovskite The ore porous materials will be in direct contact, and there are still problems of high temperature in the preparation process and Sr segregation during the operation of the battery. Therefore, when preparing a single cell, the single cell structure needs to increase the isolation layer.
[0009] In summary, in the current structure of solid oxide batteries, although there are methods for modifying the cathode and electrolyte, it is still unable to overcome the problems of insufficient cathode modification, high preparation process temperature, and serious Sr segregation. A separation layer is added between the electrolyte and the cathode, and the preparation process is complicated, and the compactness and battery life cannot be guaranteed

Method used

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  • A Zirconium-Based Anode-Supported Solid Oxide Battery Without a Separator
  • A Zirconium-Based Anode-Supported Solid Oxide Battery Without a Separator
  • A Zirconium-Based Anode-Supported Solid Oxide Battery Without a Separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (1) Anode powder pretreatment: select commercial NiO, 8%Y 2 o 3 -ZrO 2 (YSZ), adding ethanol and zirconia balls according to the mass ratio of 1:1 for ball milling pretreatment for 24 h, after ball milling and drying through a 200-mesh sieve to obtain pretreated anode powder.

[0080] (2) Preparation of anode support: dry press the pretreated anode powder obtained in step (1), and pre-sinter at 1000 °C to obtain a pre-sintered NiO-YSZ anode support.

[0081] (3) Preparation of a half-cell with a dense electrolyte layer: mix YSZ powder, isopropanol and castor oil at a ratio of 1:10:0.01 and ultrasonically pass the suspension through a 200-mesh sieve for 2 h; The NiO-YSZ anode support body was immersed in the solution, and after staying for a while, the solution was slowly pulled out, and after drying, it was calcined at 1350 °C for 5 hours to obtain an anode support half-cell with a dense YSZ film.

[0082] (4) Preparation of a separator-free zirconium-based anode-sup...

Embodiment 2

[0085] (1) Anode powder pretreatment: select commercial NiO, 8%Y 2 o 3 -ZrO 2 (YSZ), adding ethanol and zirconia balls according to the mass ratio of 1:1 for ball milling pretreatment for 24 h, after ball milling and drying through a 200-mesh sieve to obtain pretreated anode powder.

[0086] (2) Preparation of anode support body: dry press the pretreated anode powder obtained in step (1), and pre-sinter at 1000 °C to obtain a pre-sintered NiO-YSZ anode support body.

[0087] (3) Preparation of a half-cell with a dense electrolyte layer: mix YSZ powder, isopropanol and castor oil at a mass ratio of 1:10:0.01 and sonicate for 2 h, pass the suspension through a 200-mesh sieve; pre-sinter the obtained product in step (2) The final NiO-YSZ anode support body was immersed in the solution, and after staying for a while, the solution was slowly pulled out, and after drying, it was calcined at 1350 °C for 5 hours to obtain an anode support half-cell with a dense YSZ film.

[0088] (...

Embodiment 3

[0091] (1) Anode powder pretreatment: select commercial NiO, 8% Y 2 o 3 -ZrO 2 (YSZ), adding ethanol and zirconia balls according to the mass ratio of 1:1 for ball milling pretreatment for 24 h, after ball milling and drying through a 200-mesh sieve to obtain pretreated anode powder.

[0092] (2) Preparation of anode support body: dry press the pretreated anode powder obtained in step (1), and pre-sinter at 1000 °C to obtain a pre-sintered NiO-YSZ anode support body.

[0093] (3) Preparation of a half-cell with a dense electrolyte layer: mix YSZ powder, isopropanol and castor oil at a ratio of 1:10:0.01 and ultrasonically pass the suspension through a 200-mesh sieve for 2 h; The NiO-YSZ anode support body was immersed in the solution, and after staying for a while, the solution was slowly pulled out, and after drying, it was calcined at 1350 °C for 5 hours to obtain an anode support half-cell with a dense YSZ film.

[0094] (4) Preparation of a separator-free zirconium-base...

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Abstract

The invention relates to a solid oxide battery supported by a zirconium-based anode without a separator, which is characterized in that it includes an anode layer, an electrolyte layer and a membrane-coated cathode layer in sequence; wherein, the anode layer is a mixed material of NiO and zirconium-based electrolyte, and the electrolyte The layer is a zirconium-based electrolyte material; the membrane-wrapped cathode layer is composed of a membrane-wrapped functional layer and a membrane-wrapped current collector layer, the membrane is a full nanometer membrane with a thickness of 5-30 nm, and the membrane contains Sr Based on the perovskite material or metal oxide, the cathode layer is impregnated with the mixed solution of the precursor of the coating material and calcined to form a nano-film coating structure on the surface of the cathode layer. The zirconium-based anode-supported solid oxide battery of the present invention removes the cerium oxide separation layer between the electrolyte layer and the cathode layer, reducing the one-step high-temperature sintering process; optimizes the microstructure of the cathode material, avoids the reaction between the cathode and the electrolyte, Improve battery stability.

Description

technical field [0001] The invention relates to a medium-temperature solid oxide battery, in particular to a zirconium-based anode-supported solid oxide battery without an isolation layer and a preparation method thereof. Background technique [0002] Solid oxide cell (SOC) is an efficient all-solid-state energy conversion device, including fuel cell mode (SOFC) and electrolytic cell mode (SOEC), which can realize direct mutual conversion between chemical energy and electrical energy, and has high energy conversion efficiency , the reaction process has the advantages of no pollution and environmental friendliness. [0003] ZrO doped with different rare earth metal materials 2 It is currently the most widely used electrolyte material, and most of the global commercial SOFC uses this material as the electrolyte. However, doped ZrO 2 The material has poor chemical compatibility with Sr-containing perovskite cathode materials used in medium and low temperatures. When preparin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1213H01M8/1253H01M4/86C25B9/17C25B9/60C25B11/04
CPCH01M4/8657H01M8/1213H01M8/1253H01M2008/1293Y02E60/50
Inventor 郑紫微雷泽景俊萌杨志宾彭苏萍
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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