Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for strontium titanate lanthanum based powder material

A powder material, strontium lanthanum-based technology, which is applied in the field of preparation of strontium lanthanum titanate-based powder materials, can solve the problems of small specific surface area, small active area, affecting battery performance, etc.

Inactive Publication Date: 2012-08-01
UNIV OF SCI & TECH BEIJING
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the perovskite-type lanthanum-doped strontium titanate anode material is usually synthesized by solid-state reaction method, which requires repeated calcination, the final phase formation temperature is high, and the obtained powder particles are relatively large, which is not conducive to the later preparation of solid oxide fuel cells. At the same time, the large particles lead to a small specific surface area, and the active area for effective reaction on the anode side is small, which in turn affects the performance of the battery.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for strontium titanate lanthanum based powder material
  • Preparation method for strontium titanate lanthanum based powder material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] La 0.3 Sr 0.7 Ti 0.99 co 0.01 o 3±δ (0≦δ≦1) powder synthesis, the specific steps are as follows:

[0024] The raw material is: tetrabutyl titanate (C 16 h 36 o 4 Ti), strontium nitrate (Sr(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 3 ·6H 2 O), calcined lanthanum oxide (La 2 o 3 ), citric acid, nitric acid, ammonia water, absolute ethanol.

[0025] Synthesize 0.01 mol La according to the stoichiometric ratio 0.3 Sr 0.7 Ti 0.99 co 0.01 o 3±δ (0≦δ≦1), weigh the required strontium nitrate, cobalt nitrate, lanthanum oxide, 20 ml deionized water, 15 ml concentrated nitric acid, and ammonia water to prepare a uniform light red solution A.

[0026] Dissolve the required citric acid in 20 ml of deionized water and adjust the pH with ammonia water to obtain solution B; add 40 ml of absolute ethanol to the weighed tetrabutyl titanate solution to obtain a uniform solution C; Add it dropwise to the C solution, and keep stirring, then at 80 o C water bath to obtain a ...

example 2

[0030] La 0.3 Sr 0.7 Ti 0.97 co 0.03 o 3±δ (0≦δ≦1) powder synthesis, the specific steps are as follows:

[0031] The raw material is: tetrabutyl titanate (C 16 h 36 o 4 Ti), strontium nitrate (Sr(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 3 ·6H 2 O), calcined lanthanum oxide (La 2 o 3 ), citric acid, nitric acid, ammonia water, absolute ethanol.

[0032] Synthesize 0.01 mol La according to the stoichiometric ratio 0.3 Sr 0.7 Ti 0.97 co 0.03 o 3±δ (0≦δ≦1), weigh the required strontium nitrate, cobalt nitrate, lanthanum oxide, 20 ml deionized water, 15 ml concentrated nitric acid, and ammonia water to prepare a uniform light red solution A.

[0033] Weigh the required citric acid and dissolve it in 20 ml deionized water to adjust the pH with ammonia water to obtain solution B. Add 40 ml of absolute ethanol to the weighed tetrabutyl titanate solution to obtain a homogeneous solution C. Then add the B solution dropwise to the C solution, and keep stirring, then at ...

example 3

[0037] La 0.3 Sr 0.7 Ti 0.95 co 0.05 o 3±δ (0≦δ≦1) powder synthesis, the specific steps are as follows:

[0038] The raw material is: tetrabutyl titanate (C 16 h 36 o 4 Ti), strontium nitrate (Sr(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 3 ·6H 2 O), calcined lanthanum oxide (La 2 o 3 ), citric acid, nitric acid, ammonia water, absolute ethanol.

[0039] Synthesize 0.01mol La according to the stoichiometric ratio 0.3 Sr 0.7 Ti 0.95 co 0.05 o 3±δ (0≦δ≦1), weigh the required strontium nitrate, cobalt nitrate, lanthanum oxide, 20 ml deionized water, 15 ml concentrated nitric acid, and ammonia water to prepare a uniform light red solution A.

[0040] Weigh the required citric acid and dissolve it in 20 ml deionized water to adjust the pH with ammonia water to obtain solution B. Add 40 ml of absolute ethanol to the weighed tetrabutyl titanate solution to obtain a homogeneous solution C. Then add the B solution dropwise to the C solution, and keep stirring, then at 8...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A preparation method for a strontium titanate lanthanum based powder material belongs to the field of fuel cells. The method adopts a citric acid-nitrate spontaneous combustion method, using citric acid as a complexing agent and a reducing agent, using nitric acid as an oxidizing agent, introducing a sintering acid ammonium nitrate in-situ, dissolving with metal nitrate in deionized water, adding a tetrabutyl titanate citric acid solution to form an even transparent solution, heating in water bath, removing surplus water, forming even sol, and heating the sol in a muffle furnace till spontaneous combustion happens to form fluffy precursor powder. Then Grinding and calcining in an electric furnace to obtain single strontium lanthanum based anode powder. The preparation method has the advantages of being simple in synthesis process, low in cost, fine and even in powder particles and low in material phase forming temperature. The method is also applicable to synthesis preparation of strontium titanate based nanometer powder and can be used for laboratory synthesis and industrial production of a solid oxide fuel cell anode powder material.

Description

[0001] technical field [0002] The invention belongs to the field of fuel cells, and in particular relates to a method for preparing a strontium lanthanum titanate-based powder material suitable for solid oxide fuel cell anodes. technical background [0003] In recent decades, SOFC, as an alternative energy technology with the most commercial potential, has become a research hotspot worldwide. At present, the fuel gas used in SOFC work is mainly hydrogen, and because the preparation cost of hydrogen is very high, and there are still big problems in the transportation and storage of hydrogen, these make the cost of SOFC remain high, and it is difficult to realize commercial application. Therefore, the current development trend of SOFC is to directly use hydrocarbons as fuel. Because the traditional anode material Ni / YSZ will cause severe carbon deposition and sulfur poisoning when it catalyzes hydrocarbon fuels, Ni sintering and other problems will occur after long-term wor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/47C04B35/626H01M4/86
CPCY02E60/50
Inventor 赵海雷杜志鸿夏青沈永娜王捷
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com