Preparation method for samarium-doped cerium oxide solid electrolyte powder

A solid electrolyte, cerium oxide technology, applied in chemical instruments and methods, rare earth metal oxides/hydroxides, circuits, etc., can solve problems such as adverse effects of electrolyte materials, improve product uniformity and consistency, and facilitate the process flow Controlled, easily granular effects

Inactive Publication Date: 2017-07-14
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the methods in the prior art still have some problems in the preparation of doped powder raw materials, such as powder particle size, particle morphology and dispersibility, which adversely affect the preparation of electrolyte materials.

Method used

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  • Preparation method for samarium-doped cerium oxide solid electrolyte powder
  • Preparation method for samarium-doped cerium oxide solid electrolyte powder
  • Preparation method for samarium-doped cerium oxide solid electrolyte powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare SDC powder as follows:

[0038] (1) Ce(NO 3 ) 3 ·6H 2 O is dissolved in deionized water to make a cerium nitrate solution with a concentration of 1mol / L;

[0039] (2) Sm(NO 3 ) 3 ·6H 2 O is dissolved in deionized water and is made into the samarium nitrate solution that concentration is 1mol / L;

[0040] (3) Mix cerium nitrate solution and samarium nitrate solution according to the volume ratio of 4:1, and dilute with deionized water until the sum of Ce and Sm metal ion concentrations is 0.05mol / L, to obtain A solution;

[0041] (4) dissolving ammonium carbonate with deionized water to form a 0.05mol / L ammonium carbonate solution, adding dispersant BYK180 to it, and the concentration reaches 0.2g / L to obtain solution B;

[0042] (5) Dissolve citric acid, oxalic acid and ammonium chloride into solution with deionized water, citric acid concentration 0.08g / L, oxalic acid concentration 0.2g / L, ammonium chloride concentration 0.15g / L, obtain C solution;

[00...

Embodiment 2

[0047] Prepare SDC powder as follows:

[0048] (1) Ce(NO 3 ) 3 ·6H 2 O is dissolved in deionized water to make a cerium nitrate solution with a concentration of 1mol / L;

[0049] (2) Sm(NO 3 ) 3 ·6H 2 O is dissolved in deionized water and is made into the samarium nitrate solution that concentration is 1mol / L;

[0050] (3) The cerium nitrate solution and the samarium nitrate solution are mixed according to the volume ratio of 4:1, and diluted with deionized water until the concentration of Ce and Sm metal ions is 0.05mol / L to obtain the A solution;

[0051] (4) Ammonium carbonate was dissolved in deionized water to form a 0.05mol / L ammonium carbonate solution, and the dispersant BYK182 was added therein until the concentration reached 0.25g / L to obtain solution B;

[0052] (5) Dissolve citric acid, oxalic acid and ammonium chloride into solution with deionized water, citric acid concentration 0.1g / L, oxalic acid concentration 0.25g / L, ammonium chloride concentration 0.16...

Embodiment 3

[0057] Prepare SDC powder as follows:

[0058] (1) Ce(NO 3 ) 3 ·6H 2 O is dissolved in deionized water to make a cerium nitrate solution with a concentration of 1mol / L;

[0059] (2) Sm(NO 3 ) 3 ·6H 2 O is dissolved in deionized water and is made into the samarium nitrate solution that concentration is 1mol / L;

[0060] (3) Mix cerium nitrate solution and samarium nitrate solution according to the volume ratio of 4:1, and dilute with deionized water until the sum of Ce and Sm metal ion concentrations is 0.05mol / L, to obtain A solution;

[0061] (4) Ammonium carbonate was dissolved in deionized water to form a 0.05mol / L ammonium carbonate solution, and the dispersant BYK190 was added therein until the concentration reached 0.3g / L to obtain solution B;

[0062] (5) Dissolve citric acid, oxalic acid and ammonium chloride into solution with deionized water, citric acid concentration 0.12g / L, oxalic acid concentration 0.27g / L, ammonium chloride concentration 0.18g / L, obtain C ...

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Abstract

The invention provides a preparation method for samarium-doped cerium oxide solid electrolyte powder, and belongs to the field of a fuel cell. The preparation method is characterized by comprising the steps of preparing cerium nitrate, samarium nitrate and ammonium carbonate into solutions A and B, adding a BYK series dispersing agent into an ammonium carbonate solution, and preparing citric acid, oxalic acid and ammonium chloride into a solution C; mixing the solution A and the solution C in deposition, and dropwise adding into the solution B, and stirring and reacting to generate precipitates; and performing separating, cleaning, drying, calcining and smashing on the precipitates to obtain nanoscale SDC powder. By virtue of the preparation method, the nanoscale, spherical and high-dispersity SDC powder can be obtained easily; the overall technological process of the method can be controlled easily, and the process is convenient and rapid; meanwhile, the stability of the production process is improved, and the uniformity and consistency of the product are enhanced; and the powder state is quite beneficial to the subsequent preparation of a solid electrolyte thin film.

Description

technical field [0001] The invention belongs to the field of fuel cells, and more specifically relates to a method for preparing solid electrolyte powder for solid oxide fuel cells. Background technique [0002] A fuel cell, also known as an electrochemical generator, converts the chemical energy stored in fuel and oxidant directly into electrical energy. Fuel cells can be divided into five types according to different electrolytes: phosphate fuel cells (PAFC), polymer electrolyte membrane fuel cells (PEMFC), alkaline fuel cells (AFC), molten carbonate fuel cells (MCFC), solid Oxide Fuel Cells (SOFCs). Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) uses solid ceramic material as electrolyte, which is an efficient and environment-friendly all-solid-state chemical power generation device. SOFC is a kind of all-solid ceramic material fuel cell, which can avoid the problem of liquid electrolyte corrosion, high working temperature (600-1000 ℃), the reactants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/126C01F17/00
CPCC01F17/206C01P2004/04C01P2004/32C01P2004/64H01M8/126H01M2008/1293Y02E60/50Y02P70/50
Inventor 林清晨王晶莹林涛郭友吕思键吴朝圣
Owner UNIV OF SCI & TECH BEIJING
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