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

Perovskite Co-based composite negative electrode material as well as preparation and application thereof

A fuel cell and mixed grinding technology, which is applied to battery electrodes, solid electrolyte fuel cells, electrical components, etc., can solve the problems of inconsistent thermal matching of base electrolyte, low thermal expansion coefficient of cathode material, high thermal expansion coefficient, etc., and achieve excellent electrochemical performance , high output power, high and medium temperature catalytic activity

Active Publication Date: 2015-07-15
锦州宇博保温建材有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At 800 °C, the electronic conductivity of the LSCF system reaches 10 2 ~10 3 S / cm, the conduction of oxygen ions through the oxygen vacancy diffusion mechanism can reach 10 -2 ~100S / cm oxygen ion conductivity, but the thermal expansion coefficient of the LSCF system is high, and CeO 2 The thermal matching of the base electrolyte does not match, and the single-doped Ca 2+ La 1-x Ca x co 1-y Fe y o 3 The cathode material has a low coefficient of thermal expansion and poor electrical properties

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
  • Perovskite Co-based composite negative electrode material as well as preparation and application thereof
  • Perovskite Co-based composite negative electrode material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ①Electron-oxygen ion mixed conductor La 0.7 Sr 0.15 Ca 0.15 co 0.8 Fe 0.2 o 3-δ Cathode material preparation

[0036] a. La(NO 3 ) 3 ·6H 2 O(AR), Sr(NO 3 ) 2 (AR), Ca(NO 3 ) 2 4H 2 O(AR), Co(NO 3 ) 3 ·6H 2 O(AR) and Fe(NO 3 ) 3 9H 2 O(AR) by La 0.7 Sr 0.15 Ca 0.15 co 0.8 Fe 0.2 o 3-δ After weighing the stoichiometric ratio, dissolve with distilled water to form a nitrate mixed solution; be 1.5: 1 to take citric acid according to the mol ratio of citric acid (AR) and metal ion, and dissolve citric acid with distilled water;

[0037] b. Pour the citric acid solution into the nitrate mixed solution, and adjust the pH to 2 with ammonia water;

[0038] c. Stir the mixed solution magnetically at 65-75°C. With the continuous evaporation of the solvent, the solution gradually thickens and finally forms a gel; place the gel in an electric constant temperature blast drying oven at 120°C to dry the precursor ;

[0039] d. The precursor was microwave-calcin...

Embodiment 2

[0058] ①Electron-oxygen ion mixed conductor La 0.7 Sr 0.15 Ca 0.15 co 0.8 Fe 0.2 o 3-δ Cathodic material synthesis

[0059] a. La(NO 3 ) 3 ·6H 2 O, Sr(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, Co(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O Press La 0.7 Sr 0.15 Ca 0.15 co 0.8 Fe 0.2 o 3-δ After the stoichiometric ratio is weighed, it is dissolved in distilled water to form a mixed solution of nitrate; the citric acid is weighed according to the molar ratio of metal ions in the mixed solution of citric acid and nitrate is 2:1, and the citric acid is dissolved in distilled water.

[0060] b. with embodiment 1.

[0061] c. With embodiment 1.

[0062] d. The precursor was microwave-calcined at 1000 °C for 1.5 h to prepare the electron-oxygen ion mixed conductor La with perovskite structure 0.7 Sr 0.15 Ca 0.15 co 0.8 Fe 0.2 o 3-δ cathode material.

[0063] Step 2. and 3. are with embodiment 1;

[0064] Wherein 4. b step is as follows, other steps are with embodime...

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

PropertyMeasurementUnit
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an A-site double-doped Co-based perovskite composite negative electrode material as well as preparation and application thereof, and relates to the field of an intermediate-temperature solid oxide fuel cell, belonging to the field of new energy materials. The perovskite Co-based composite negative electrode material consists of the following components in percentage by mass: 50% of La0.7Sr0.15Ca0.15Co0.8Fe0.2O(3-delta), 37.5% of Ce0.8Sm0.2O(2-delta) and 12.5% of Li2CO3 and Na2CO3. The composite negative electrode material has high electronic and ionic conductivities, relatively high intermediate-temperature catalytic activity and good electrochemical performance, and is relatively well compatible with a cerium-based electrolytic material in terms of thermal performance and chemical performance; and moreover, as the negative electrode of a intermediate-temperature solid oxide fuel cell, the composite negative electrode material has relatively high output power.

Description

technical field [0001] The invention relates to an A-site double-doped Co-based perovskite type composite cathode material and its preparation and application, relates to the field of medium-temperature solid oxide fuel cells, and belongs to the field of new energy materials. Background technique [0002] Solid oxide fuel cell (SOFC, solid oxide fuel cell) is an energy conversion device that directly converts the chemical energy of fuel gas and oxidizing gas into electrical energy. It has the advantages of cleanliness and high efficiency, so it is called two Green energy in the eleventh century. [0003] At present, the traditional cathode material lanthanum manganate has a rapid decrease in conductivity and a rapid increase in polarization resistance under medium temperature conditions, that is, below 800 °C, which is difficult to meet the requirements of intermediate temperature solid oxide fuel cells (ITSOFC, Intermediate temperature solid oxide fuel cell). ) requirement...

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 Patents(China)
IPC IPC(8): H01M4/525H01M4/48H01M4/86H01M8/12
CPCY02E60/122Y02E60/525Y02E60/521Y02E60/10Y02E60/50
Inventor 高文元刘建波韩庆贺
Owner 锦州宇博保温建材有限公司
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