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Preparation method of modified ZrO2-based solid composite electrolyte ceramic material

A composite electrolyte and ceramic material technology, which is applied in the field of preparation of modified ZrO2-based solid composite electrolyte ceramic materials, can solve the problems of CuO component volatilization, difficult control of components, and difficulty in obtaining pure and equal components

Active Publication Date: 2018-11-13
HEFEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Preparation of ZrO by traditional high-temperature solid-state method 2 -CeO 2 -CuO composite materials usually need to be sintered above 1500 °C, which will easily cause the volatilization of CuO components in the raw materials, resulting in ZrO 2 or the precipitation of other impurity phases, it is difficult to obtain pure phases, and the components will become uncontrollable

Method used

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  • Preparation method of modified ZrO2-based solid composite electrolyte ceramic material
  • Preparation method of modified ZrO2-based solid composite electrolyte ceramic material
  • Preparation method of modified ZrO2-based solid composite electrolyte ceramic material

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Experimental program
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Embodiment 1

[0027] A modified ZrO 2 The preparation method of matrix solid composite electrolyte ceramic material, the steps are as follows:

[0028] ①, according to the target sample (ZrO 2 ) 0.89 (CeO 2 ) x (CuO) 0.11-x The stoichiometric ratio, weigh zirconium nitrate, cerium nitrate, copper nitrate, add 30ml distilled water, then add citric acid, fully stir to make it dissolve. There are 6 groups in the experiment, and x is taken from 0, 0.02, 0.04, 0.06, 0.08, 0.10 respectively. For each set of experiments, the molar mass of citric acid was 1.5 times the amount of metal ions contained in the components.

[0029]②. Add ethylene glycol (1.2 times the weight of citric acid) to the mixed solution, and then put the solution in an ultrasonic cleaner to ultrasonically disperse the ethylene glycol evenly.

[0030] ③. Use dilute ammonia water as a pH regulator to titrate the solution to adjust the pH value of the solution to 7.

[0031] ④. Heat and stir in a constant temperature water...

Embodiment 2

[0035] (ZrO 2 ) 0.89 (CeO 2 ) x (CuO) 0.11-x Performance characterization of ceramic sheets

[0036] 1. X-ray diffraction analysis

[0037] The diffraction patterns produced by crystals with different atomic arrangements are generally different. Diffraction geometry and intensity are two aspects of determining a series of information such as crystal structure. From them, information such as lattice structure, unit cell size and shape related to the crystal can be deduced.

[0038] According to the diffraction conditions, using the Bragg formula: 2dsinθ=nλ, and then through the measured specific wavelength λ, the lattice constant of the sample can be calculated.

[0039] figure 1 (ZrO obtained in Example 1 2 ) 0.89 (CeO 2 ) x (CuO) 0.11-x XRD patterns of electrolyte powder materials. Depend on figure 1 It can be clearly seen that the plane indices corresponding to the three strong peaks are (011), (020) and (121). The rest of the weaker diffraction peaks correspon...

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Abstract

The invention relates to a preparation method of a modified ZrO2-based solid composite electrolyte ceramic material, and relates to the technical field of preparation of a solid electrolyte ceramic material. The method comprises the following steps: weighing zirconium nitrate, cerous nitrate and cupric nitrate, feeding the materials into distilled water, then adding citric acid, and sufficiently stirring to ensure that the materials are sufficiently dissolved; adding glycol into mixed liquor, and ensuring that the glycol is uniformly dispersed through ultrasound; adjusting the pH value of a solution, then performing thermostatic waterbath heating and stirring till sol is formed, and leaving the sol to stand to form gel; drying and then calcining the gel, and grinding the gel into ultrafinepowder after calcination is accomplished, so as to obtain an electrolyte powder material; adding PVA to perform granulation, pressing granules into pieces under pressure, and performing sintering through a programmed temperature furnace, so as to obtain the ZrO2-based solid composite electrolyte ceramic material. The method prepares solid composite through an ultrasonic-assisted sol-gel method, and dopes cerium oxide and cupric oxide in zirconium oxide base, so as to expect to improve the conductivity of the zirconium oxide base.

Description

technical field [0001] The invention relates to the technical field of preparation of solid electrolyte ceramic materials, in particular to a modified ZrO 2 A method for preparing a solid-based composite electrolyte ceramic material. Background technique [0002] The essence of Solid Oxide Fuel Cells (SOFCs) is to convert the chemical energy that is difficult to use or the chemical energy that is very inefficient in fuel into electrical energy that people can use conveniently. The interior of a solid fuel cell is made up of many small batteries connected together. The main structure of each small battery is a cathode, an anode, a click separator, an electrolyte, and a connector. In solid oxide fuel cells, the most important thing is the electrolyte, most of which are made of oxide ceramics, which generally have excellent electrical properties. In SOFCs, the electrolyte is very important because it is used as a channel to connect the electrodes so that electrons can be con...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/624C04B35/626C04B35/634H01M8/1016
CPCC04B35/48C04B35/624C04B35/62605C04B35/62695C04B35/63416C04B2235/3229C04B2235/3281C04B2235/6567C04B2235/96H01M8/1016H01M2300/0071Y02E60/50Y02P70/50
Inventor 阳杰董强魏安乐尹奇异徐洁孟俊杰贺浪欣余向阳夏鹏鹏陈志强廖文浩
Owner HEFEI UNIV
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