Method for preparing positive pole of composite metal-ceramic nanofiber SOFC (Solid Oxide Fuel Cell) by electrospinning method

A composite metal and nanofiber technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor thermal stability, achieve low manufacturing costs, high specific surface area and porosity, and fast and convenient methods

Inactive Publication Date: 2015-07-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanoparticles have high specific surface area, which can increase electrocatalytic activity, but poor thermal stability

Method used

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  • Method for preparing positive pole of composite metal-ceramic nanofiber SOFC (Solid Oxide Fuel Cell) by electrospinning method
  • Method for preparing positive pole of composite metal-ceramic nanofiber SOFC (Solid Oxide Fuel Cell) by electrospinning method
  • Method for preparing positive pole of composite metal-ceramic nanofiber SOFC (Solid Oxide Fuel Cell) by electrospinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Ni-SDC composite nanofibers were prepared by electrospinning, Ni and SDC(Ce 0.8 SM 0.2 o 1.9 ) with a mass ratio of 30:70 and a sintering temperature of 700°C for 4 hours:

[0024] a) Weigh 0.35g nickel acetate, 0.39g cerium nitrate and 0.1g samarium nitrate, dissolve them in 2.5ml dimethylformamide (DMF), then add 0.25g polyvinylpyrrolidone (PVP) and stir well.

[0025] b) Composite nanofibers containing PVP and Ni-SDC precursors prepared by electrospinning. The electrospinning electrostatic voltage is 18KV, the flow rate is 0.3mL / h, the receiving distance is 10cm, the temperature is 30°C, and the humidity is 50%.

[0026] c) The obtained composite fibers were sintered at 700 °C in air for 4 h to obtain NiO-SDC composite nanofibers.

[0027] d) NiO-SDC composite nanofibers in H 2 Reduction at 750°C for 2 hours to obtain Ni-SDC anode material.

[0028] e) The Ni-SDC anode material was loaded on the half-cell supported by the SDC electrolyte and the LSM-SDC powder ...

Embodiment 2

[0031] Ni-SDC composite nanofibers were prepared by electrospinning, Ni and SDC(Ce 0.8 SM 0.2 o 1.9 ) with a mass ratio of 30:70 and a sintering temperature of 750°C for 3 hours:

[0032] a) Weigh 0.35g nickel acetate, 0.39g cerium nitrate and 0.1g samarium nitrate, dissolve them in a mixed solution consisting of 2.5ml DMF, 1.5ml acetone and 0.5ml glacial acetic acid, then add 0.12g PVP and stir well.

[0033] b) Composite nanofibers containing PVP and Ni-SDC precursors prepared by electrospinning. The electrospinning electrostatic voltage is 30KV, the flow rate is 0.1mL / h, the receiving distance is 8cm, the temperature is 10°C, and the humidity is 10%.

[0034] c) The obtained composite fibers were sintered at 750 °C in air for 3 h to obtain NiO-SDC composite nanofibers.

[0035] d) NiO-SDC composite nanofibers in H 2 Reduction at 800°C for 1 h to obtain Ni-SDC anode material.

[0036] e) The Ni-SDC anode material was loaded on the half-cell supported by the SDC electro...

Embodiment 3

[0039] Ni-SDC composite nanofibers were prepared by electrospinning, Ni and SDC(Ce 0.8 SM 0.2 o 1.9 ) with a mass ratio of 60:40 and a sintering temperature of 700°C for 4 hours:

[0040] a) Preparation of Ni-SDC composite nanofiber spinning solution. Weigh 1.2g of nickel acetate, 0.39g of cerium nitrate and 0.1g of samarium nitrate, respectively dissolve them in a mixed solution consisting of 2ml of deionized water, 2ml of absolute ethanol and 1ml of acetone, then add 1.31g of PVP and stir thoroughly.

[0041]b) Composite nanofibers containing PVP and Ni-SDC precursors prepared by electrospinning. The electrospinning electrostatic voltage is 25KV, the flow rate is 0.5mL / h, the receiving distance is 12cm, the temperature is 25°C, and the humidity is 45%.

[0042] c) The obtained composite fibers were sintered at 700 °C in air for 4 h to obtain NiO-SDC composite nanofibers.

[0043] d) NiO-SDC composite nanofibers in H 2 Reduction at 750°C for 2 hours to obtain Ni-SDC ano...

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Abstract

The invention discloses a method for preparing a positive pole of a composite metal-ceramic nanofiber SOFC (Solid Oxide Fuel Cell) by an electrospinning method. The method comprises the following steps of: preparing composite nanofibers containing macromolecules and a metal-ceramic precursor from soluble metal salt, the ceramic precursor, a high-molecular polymer, a solvent and few additives, which are taken as raw materials, by the electrostatic spinning technology; then, sintering the fibers to remove macromolecules to obtain a metal oxide-ceramic composite nanofiber material; and finally, reducing the metal oxide-ceramic composite nanofiber material in an H2 atmosphere to obtain the positive pole material of the metal-ceramic composite SOFC. Compared with a cell formed by a traditional powder positive pole, the cell with the metal-ceramic composite nanofibers as the positive pole has better electrochemical properties through an electrochemical test under same test conditions, i.e., the power density increases, the polarization resistance is reduced and the like. Therefore, the method has a long-range significance in future development of the SOFC.

Description

technical field [0001] The invention belongs to the field of fuel cell anode materials, and relates to a method for preparing SOFC anode materials, in particular to a method for preparing composite metal-fluorite ceramic nanofiber SOFC anodes by electrospinning. Background technique [0002] Electrospinning technology, referred to as electrospinning, is a simple and easy method to prepare nanomaterials. Using electrospinning technology, people can controllably prepare one-dimensional nanostructure materials, such as nanofibers. The fiber structure prepared by electrospinning has a series of unique characteristics and properties, such as unique one-dimensional structure, large aspect ratio, high specific surface area, porous, etc. [0003] At present, SOFC anode catalytic materials mainly include porous metal-ceramic composite anode materials, such as Ni-YSZ, Ni-SDC, Ni-GDC, Cu-SDC, Co-SDC, etc. The performance of SOFC anode mainly depends on its composition and microstruct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90
CPCY02E60/50
Inventor 郑颖平葛衫孙岳明陈红黄烁胡爱江
Owner SOUTHEAST UNIV
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