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

Preparation method of mid-low temperature solid oxide fuel cell cathode material

A fuel cell cathode, solid oxide technology, applied in solid electrolyte fuel cells, battery electrodes, circuits, etc., can solve problems such as poor electrical conductivity and large thermal expansion coefficient, and achieve enhanced dissociation and adsorption capacity and extended service life. , the effect of ohmic resistance and polarization resistance reduction

Inactive Publication Date: 2017-01-11
董晓
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: in view of the defects of large thermal expansion coefficient and poor electrical conductivity in the current traditional battery cathode materials, this method first mixes praseodymium nitrate hexahydrate and copper nitrate trihydrate, then adds citric acid, and sinters at high temperature Made Pr 2 CuO 4 powder, then mixed with gadolinium oxide, cerium nitrate hexahydrate, citric acid, etc., calcined, ball milled with lithium oxide and absolute ethanol, and finally mixed with Pr 2 CuO 4 The powder mixture is pressed and molded, and sintered to obtain the cathode material of the medium-low temperature solid oxide fuel cell. The invention forms the electrolyte material of the battery by doping metal elements such as praseodymium, cerium, and gadolinium, and greatly increases its oxygen vacancy concentration, thereby increasing its ion density. Conductivity, and make up for the defect that the thermal expansion coefficient of the battery cathode material changes greatly under high temperature operation. It has been proved by examples that the obtained medium and low temperature solid oxide fuel cell cathode material is relatively stable in properties at medium and low temperature conditions, and has good electrical conductivity. performance, battery life is extended

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First, weigh 8.4g of praseodymium nitrate hexahydrate and 2.4g of copper nitrate trihydrate, add them into 80mL of deionized water, stir and mix evenly at 300r / min, add 5.8g of citric acid, and heat and evaporate to the original volume in a constant temperature water bath at 80°C. 1 / 8 to obtain a viscous colloid, then put the viscous colloid in a muffle furnace and bake it at 180°C for 10-15 minutes to obtain an oxide powder; add the above oxide powder into the muffle furnace, Calcined at 500°C for 2h, then ground it in a mortar, passed through a 300-mesh sieve, put the sieved oxide powder into a high-temperature furnace, and sintered at 800°C for 8h to obtain Pr 2 CuO 4 Powder, standby; Weigh 3.2g of gadolinium oxide and add 50mL of sulfuric acid solution with a mass fraction of 20%, stir at 300r / min for 15min, add 20g of cerium nitrate hexahydrate, continue stirring until the solid is completely dissolved, add 9.6g of citric acid, at 80 °C in a constant temperature w...

example 2

[0018]First, weigh 10.2g of praseodymium nitrate hexahydrate and 3.0g of copper nitrate trihydrate, add them into 90mL of deionized water, stir and mix evenly at 350r / min, add 7.0g of citric acid, and heat and evaporate to the original volume in a 90°C constant temperature water bath. 1 / 8 to obtain a viscous colloid, then put the viscous colloid in a muffle furnace and bake it at 190°C for 10-15 minutes to obtain an oxide powder; add the above oxide powder into the muffle furnace, Calcined at 600°C for 3 hours, then ground it in a mortar, passed through a 300-mesh sieve, put the sieved oxide powder into a high-temperature furnace, and sintered at 850°C for 9 hours to obtain Pr 2 CuO 4 Powder, standby; weigh 3.4g of gadolinium oxide and add it to 65mL of sulfuric acid solution with a mass fraction of 20%, stir at 350r / min for 17min, add 21g of cerium nitrate hexahydrate, continue to stir until the solid is completely dissolved, add 10.4g of citric acid, at 90 °C in a constant ...

example 3

[0020] First, weigh 12.6g of praseodymium nitrate hexahydrate and 3.6g of copper nitrate trihydrate, add them into 100mL of deionized water, stir and mix evenly at 400r / min, add 8.7g of citric acid, and heat and evaporate to the original volume in a constant temperature water bath at 100°C. 1 / 8, to get a viscous colloid, then put the viscous colloid in a muffle furnace, and bake it at 200°C for 10-15 minutes to get an oxide powder; put the above oxide powder into the muffle furnace, Calcined at 700°C for 4 hours, then ground it in a mortar, passed through a 300-mesh sieve, put the sieved oxide powder into a high-temperature furnace, and sintered it at 900°C for 10 hours to obtain Pr 2 CuO 4 Powder, standby; Weigh 3.6g of gadolinium oxide and add it to 80mL mass fraction of 20% sulfuric acid solution, stir at 400r / min for 20min, add 22g of cerium nitrate hexahydrate, continue stirring until the solid is completely dissolved, add 11.5g of citric acid, ℃ in a constant temperatur...

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

The invention discloses a preparation method of a mid-low temperature solid oxide fuel cell cathode material, and belongs to the technical field of cell cathode materials. The method comprises the steps of firstly mixing praseodymium nitrate hexahydrate with copper nitrate trihydrate evenly, then adding a citric acid and carrying out high-temperature sintering to prepare Pr2CuO4 powder; mixing a gadolinium oxide with cerium nitrate hexahydrate, the citric acid and the like, burning the mixture and then carrying out ball-milling on the mixture, a lithium oxide and absolute ethyl alcohol to form powder; and finally carrying out mixing and compression molding on the powder and the Pr2CuO4 powder and carrying out sintering to obtain the mid-low temperature solid oxide fuel cell cathode material. An electrolyte material of a cell is formed by doping metal elements of praseodymium, cerium, gadolinium and the like and the oxygen vacancy concentration is greatly improved, so that the ionic conductivity is improved and the defect of a relatively large thermal expansion coefficient change of the cell cathode material under high temperature operation is compensated. An example proves that the obtained mid-low temperature solid oxide fuel cell cathode material is relatively stable in property under a mid-low temperature condition and has good conductivity, and the service lifetime of the cell is prolonged.

Description

technical field [0001] The invention discloses a method for preparing a cathode material of a medium-low temperature solid oxide fuel cell, and belongs to the technical field of cathode materials for batteries. Background technique [0002] Fossil energy has made great contributions to human progress, and will still play an extremely important role in the development of human society in the next few decades. However, with the rapid development of human civilization, over-exploitation and inefficient use of fossil energy have caused worldwide energy shortages and serious environmental pollution problems. Before successfully developing clean alternative energy sources, more rational and efficient use of existing energy resources is of great significance for the healthy and sustainable development of modern society. As an electrochemical energy conversion device, the fuel cell directly converts the chemical energy in the fuel into electrical energy, and has the outstanding adv...

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
IPC IPC(8): H01M8/10H01M4/86H01M4/88H01M4/90
CPCH01M4/86H01M4/88H01M4/9016H01M8/10Y02E60/50Y02P70/50
Inventor 董晓宋豪陆娜
Owner 董晓
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com