Method for preparing Ni-BaO-GDC nanometer SOFC anode by means of high-speed mixing-kernel blast

A high-speed mixing, ni-bao-gdc technology for applications in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science

Inactive Publication Date: 2014-02-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the evaporation process of the solvent is inevitable in the wet chemical method, which easily leads to the agglomeration of nanoparticles during the preparation process, and the preparation process is cumbersome.

Method used

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  • Method for preparing Ni-BaO-GDC nanometer SOFC anode by means of high-speed mixing-kernel blast
  • Method for preparing Ni-BaO-GDC nanometer SOFC anode by means of high-speed mixing-kernel blast
  • Method for preparing Ni-BaO-GDC nanometer SOFC anode by means of high-speed mixing-kernel blast

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Ultrasonic dispersion of barium carbonate with a particle size of 50 nm, GDC with a particle size of 50 nm, and metallic Ni with a particle size of 1 μm was carried out for 30 min;

[0023] (2) Add barium carbonate, GDC and metal Ni after ultrasonic dispersion to the mixer in a mass ratio of 1: 1: 3 and stir for 30 min;

[0024] (3) Put the uniformly mixed barium carbonate, GDC and metallic Ni into a vibrator and mix for 30 min at a speed of 5000 rpm. Under the action of shear force and extrusion force, the small particles of barium carbonate, GDC coated onto the surface of large Ni metal to form core-shell BaCO 3 - GDCNi structure particles;

[0025] (4) The mixture was calcined at 1400 °C in air with a heating rate of 15 °C / min, and the holding time was 2 h. Using the difference in thermal expansion coefficient of the core and shell materials, the core was broken due to stress at high temperature, and the obtained Spherical grains with a grain size of 50-100 nm....

Embodiment 2

[0027] (1) Ultrasonic dispersion of barium carbonate with a particle size of 300 nm, GDC with a particle size of 200 nm, and metal Ni with a particle size of 4 μm was carried out for 20 min;

[0028] (2) Add barium carbonate, GDC and metal Ni after ultrasonic dispersion to the mixer in a mass ratio of 1: 1: 8 and stir for 20 min;

[0029] (3) Put the uniformly mixed barium carbonate, GDC and metal Ni into a vibrator and mix at a speed of 3000 rpm for 20 min;

[0030] (4) The mixture was calcined at 1250 °C in air at a heating rate of 13 °C / min, and the holding time was 1.5 h to obtain spherical grains with a grain size of 100-400 nm.

Embodiment 3

[0032] (1) Ultrasonic dispersion of barium carbonate with a particle size of 200 nm, GDC with a particle size of 100 nm, and metal Ni with a particle size of 3 μm was carried out for 25 min;

[0033] (2) Add barium carbonate, GDC and metal Ni after ultrasonic dispersion to the mixer at a mass ratio of 1.5: 1.5: 7 and stir for 20 min;

[0034] (3) Put the uniformly mixed barium carbonate, GDC and metal Ni into a vibrator and mix for 20 min at a speed of 4000 rpm;

[0035] (4) The mixture was calcined at 1350 °C in air at a heating rate of 10 °C / min, and the holding time was 1 h to obtain spherical grains with a grain size of 50-300 nm.

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Abstract

The invention discloses a method for preparing a Ni-BaO-GDC nanometer SOFC anode by means of high-speed mixing-kernel blast. The method comprises the following steps: (1) mixing nanometer barium inorganic salt, nanometer GDC and micron metal Ni in a plain bumper at high speed to obtain a core-shell structure mixed material in which the micron Ni is coated with the nanometer particles; (2) sintering the materials mixed at high speed at the high temperature of 1100-1400 DEG C for 0.5-4 hours to obtain the Ni-BaO-GDC nanometer SOFC anode. The method disclosed by the invention has the following advantages: 1. The low-cost, continuous and batch production can be realized; (2) no wastewater and waste gas are discharged in the production process, and the raw materials are free from corrosivity, toxicity, inflammability and explosion hazard; 3. the product has higher dispersibility; 4, the prepared Ni-BaO-GDC anode is 50-100nm in grain size, uniform in particle size, good in dispersibility, excellent in carbon deposition resistance and electro-catalytic property, and applicable to the SOFC anode material with hydrocarbon as the fuel.

Description

technical field [0001] The invention relates to a method for preparing a Ni-BaO-GDC nanometer SOFC anode, in particular to a method for preparing a Ni-BaO-GDC nanometer SOFC anode by using high-speed mixing-core blasting. technical background [0002] The performance of SOFC anode depends largely on the microstructure of the anode, such as the size, distribution and dispersion of metal Ni and ceramic particles in the anode. Due to their high catalytic activity and large specific surface area, nanoparticles play an important role in promoting the length of the three-phase interface between metal-ceramic-gas in the anode and thus increasing the output power of the battery. However, the usual anode preparation method can easily lead to the sintering and agglomeration of nano-Ni particles, and if NiO is used as the raw material, the reduction of NiO to metal Ni will easily lead to shrinkage of the internal pores of the particles. These are the main factors restricting the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04H01M4/88B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 李喜宝
Owner NANCHANG HANGKONG UNIVERSITY
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