Indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material and preparation method thereof

A technology of oxyapatite and solid electrolyte, applied in solid electrolyte fuel cells, circuits, fuel cells, etc., can solve the problems of high cost, easy formation of second phase, high temperature and other problems of sol-gel method, and reduce energy consumption , reduce the sintering temperature and holding time, and improve the service life

Inactive Publication Date: 2012-10-03
HARBIN INST OF TECH
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the existing sol-gel method for preparing oxyapatite-type lanthanum silicate electrolyte material has high cost and the high-temperature solid-phase reaction method has high temperature, high energy consumption and easy formation of the second phase, and provides a Indium or niobium doped oxyapatite type lanthanum silicate solid electrolyte material and preparation method thereof

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
  • Indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material and preparation method thereof
  • Indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material and preparation method thereof
  • Indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0026] Embodiment 1: In this embodiment, the chemical formula of the indium or niobium-doped oxyapatite-type lanthanum silicate solid electrolyte material is La 10 Si 6-x In x o 27-x / 2 or La 10 Si 6-x Nb x o 27+x / 2 , where the value range of x is 0

[0027] The beneficial effects of this embodiment are:

[0028] 1. Doping oxides reduces the content of the second phase and improves the density of the oxyapatite-type lanthanum silicate solid electrolyte material;

[0029] 2. Compared with the undoped oxyapatite-type lanthanum silicate solid electrolyte, the indium or niobium-doped oxyapatite-type lanthanum silicate solid electrolyte synthesized by the present invention can be used at medium and low temperatures (873-1073K) The conductivity of the solid oxide fuel cell has more than doubled, which is conducive to improving the service life of the solid oxide fuel cell.

specific Embodiment approach 2

[0030] Specific embodiment two: In this embodiment, the preparation method of indium or niobium-doped oxyapatite-type lanthanum silicate solid electrolyte material is carried out according to the following steps:

[0031] 1. The oxide powder La 2 o 3 , SiO 2 and A are respectively placed in three crucibles, and then the crucibles are placed in a high-temperature furnace at a temperature of 100-300K h -1 The heating rate is raised to 873~1273K, and after 1~4h of heat preservation, the temperature is increased to 100~500K·h -1 The cooling rate drops to room temperature; where A represents In 2 o 3 or Nb 2 o 5 ;

[0032] 2. Weigh the La processed in step 1 2 o 3 , SiO 2 and A, where La 2 o 3 with SiO 2 The ratio of the amount of substances is 5: (5.5 ~ 5.9), La 2 o 3The ratio of the amount of substance to A is 5: (0.05~0.25);

[0033] 3. Take the La that was weighed in step 2 2 o 3 , SiO 2 and A are placed in a ball mill jar, add absolute ethanol and balls, and...

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in step one, use 150~250K·h -1 The heating rate is increased to 973 ~ 1173K, and the temperature is kept for 2 ~ 3 hours. Others are the same as in the second embodiment.

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
electrical conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses an indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material and a preparation method thereof, which relate to a solid electrolyte material and the preparation method thereof and aim at solving the problems of high cost of a sol-gel method for preparing an epoxide apatite type lanthanum silicate mixed solid electrolyte material and high temperature, high energy consumption and easiness in forming a second phase of a high-temperature solid phase reaction method for preparing the epoxide apatite type lanthanum silicate mixed solid electrolyte material. The chemical formula of the electrolyte material is La10Si(6-x)InxO(27-x/2) or La10Si(6-x)NbxO(27+x/2), the preparation method of the electrolyte material comprises the following steps of: pre-sintering in low temperature after La2O3, SiO2 and In2O3 (or Nb2O5) are mixed in wet way, dried and screened, carrying out cold press molding, then carrying out cold isostatic pressing, and obtaining a product by pressureless-sintering finally. The indium or niobium epoxide apatite type lanthanum silicate mixed solid electrolyte material disclosed by the invention has the advantages that the cost is low, the period is short, the energy consumption is low, the product has higher electric conductivity under middle and low temperature, and the service life of a solid-oxide fuel cell can be facilitated to be increased. The electrolyte material disclosed by the invention is used for the solid-oxide fuel cell.

Description

technical field [0001] The invention relates to a solid electrolyte material and a preparation method thereof. Background technique [0002] Fuel cell is a highly efficient and environment-friendly electrochemical energy conversion device, which has become the most promising green energy in the 21st century due to its unique advantages. Among them, solid oxide fuel cells (Solid Oxide Fuel Cells, SOFCs) have attracted widespread attention due to their high energy conversion efficiency, simple structure, no liquid corrosion and loss, and long life. At present, yttria-stabilized zirconia (YSZ) is mainly used as the electrolyte material in commercial applications, but this material needs to be maintained at a high temperature of 1273K to maintain its high ionic conductivity. Difficult selection of connection materials, long start-up time, high manufacturing cost, sealing and structural problems, and long-term operation stability, etc., so the high operating temperature limits t...

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): H01M8/10H01M8/124H01M8/1246
CPCY02E60/521Y02E60/50
Inventor 刘占国相珺欧阳家虎周玉
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap