Doped perovskite electrolyte film for preparing fuel cell by employing hydrogen

An electrolyte membrane and fuel cell technology, applied in fuel cells, electrolytes, circuits, etc., can solve problems such as attenuation and poor oxygen ion transmission efficiency, and achieve the effects of promoting diffusion, improving hydrogen production efficiency, and solving poor oxygen ion permeability.

Inactive Publication Date: 2018-10-12
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the current YBa 2 Cu 3 o 6+δ It has good oxygen permeability at medium and high temperatures, and has poor oxygen ion transmission efficiency and serious attenuation defects in low temperature environments. The present invention proposes a doped YZr used to prepar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Prepare yttrium nitrate, barium nitrate, copper nitrate and zirconium source zirconium nitrate as an aqueous solution according to the molar ratio of yttrium, barium, copper and zirconium 1:2:3:0.1, dissolve in an appropriate amount of deionized water, and control the concentration of yttrium ions The concentration is between 0.2mol / L, then add methanol solvent to it, control the concentration of methanol to 8mol / L, then add 0.02mol / L citric acid, 0.01mol / L EDTA as complexing agent, carry out ultrasonic vibration for 4h and then static Put 6h, obtain complexation precursor solution;

[0030] (2) adding ammonia water to the complexing precursor solution, adjusting the pH value to 9.6, and stirring at a high speed, keeping the temperature at 40°C during the high-speed stirring process, to obtain a floc dispersion solution;

[0031] (3) Filter the floc dispersion solution and dry it at 65°C. During the drying process, keep vibrating at a vibration frequency of 80 Hz to...

Embodiment 2

[0035] (1) Prepare yttrium carbonate, barium chloride, copper chloride and zirconium chloride as an aqueous solution according to the molar ratio of yttrium, barium, copper and zirconium 1:2:3:0.1, dissolve in an appropriate amount of deionized water, and control the yttrium ion The concentration is between 0.8mol / L, then add methanol solvent to it, control the concentration of methanol to 8mol / L, then add 0.08mol / L citric acid, 0.04mol / L EDTA as complexing agent, carry out ultrasonic vibration for 4 hours Stand still for 10h to obtain the complex precursor;

[0036] (2) adding ammonia water to the complex precursor solution, adjusting the pH value to 8.6, and stirring at a high speed, keeping the temperature at 80°C during the high-speed stirring process, to obtain a floc dispersion solution;

[0037] (3) Filter the floc dispersion solution and dry it at 68°C. During the drying process, keep vibrating at a vibration frequency of 40 Hz to make the solvent evaporate quickly and...

Embodiment 3

[0041] (1) The yttrium source yttrium oxalate, barium acetate, copper nitrate, and zirconium nitrate are configured as an aqueous solution at a molar ratio of yttrium, barium, copper, and zirconium of 1:2:3:0.1, and dissolved in an appropriate amount of deionized water to control the concentration of yttrium ions. The concentration is between 0.2~1.8mol / L, then add methanol solvent to it, control the concentration of methanol to 3mol / L, then add 0.09mol / L citric acid, 0.056mol / L EDTA as complexing agent, carry out ultrasonic vibration for 3.5 Stand still 10h after h, obtain complexation precursor liquid;

[0042] (2) adding ammonia water to the complex precursor solution, adjusting the pH value to 9.6, and stirring at a high speed, keeping the temperature at 40-80°C during the high-speed stirring process, to obtain a floc dispersion solution;

[0043] (3) Filter the floc dispersion solution and dry it at 65°C. During the drying process, keep vibrating at a vibration frequency ...

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Abstract

The invention proposes a doped YZr<0.1>Ba<2>Cu<3>O<6+Delta> perovskite electrolyte film for preparing a fuel cell by employing hydrogen. The doped YZr<0.1>Ba<2>Cu<3>O<6+Delta> perovskite electrolyte film is characterized by being prepared according to the steps of preparing an aqueous solution from a yttrium source, a barium source, a copper source and a zirconium source according to a mole ratioof yttrium, barium, copper and zirconium being 1:2:3:0.1, adding citric acid and EDTA as a complexing agent, adjusting PH to 7.5-8, performing ultrasonic oscillation for 2 hours and then allowing to stand for 6 hours; filtering and drying the complexing agent to generate gel after full complexing, and performing high-temperature sintering on the gel; and performing isostatic compaction to obtain an electrolyte film material after the powder material is washed with ethyl alcohol and ultrasound. The critic acid is used as a crystal inducer, the doped Zr<4+> preferably enters a crystal boundary,a large amount of oxygen vacancies are formed, meanwhile, heterogeneous nucleation under a low temperature can be prevented, so that the oxygen ion transmittance is improved, the problem of poor oxygen ion transmittance of a traditional perovskite material under middle and low temperatures is solved, and the doped perovskite electrolyte film is applicable to a condition with wider working temperature zone.

Description

technical field [0001] The invention relates to the technical field of hydrogen production in the fuel cell industry, in particular to a doped YZr used for hydrogen production 0.1 Ba 2 Cu 3 o 6+δ type perovskite electrolyte membrane. Background technique [0002] Finding new energy carriers that can replace oil and gas has become an important goal of energy development in various countries today. Hydrogen is a non-polluting and renewable energy carrier, and has the characteristics of storage and transportation, which has attracted widespread attention. Hydrogen production by electrolysis of water may become the mainstream of the hydrogen energy industry in the future due to its simple process, high product purity, and easy equipment operation. The electrolytic cells currently on the market can be divided into three types: alkaline electrolytic cells, solid polymer electrolyte electrolytic cells and solid oxide electrolytic cells. Among them, the solid oxide electrolysi...

Claims

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Application Information

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IPC IPC(8): H01M8/0656
CPCH01M8/0656H01M2300/0071Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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