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Dual-doped medium-temperature solid oxide fuel cell electrolyte and preparation method thereof

A solid oxide and fuel cell technology, applied in fuel cells, electrolytes, circuits, etc., can solve the problem that the electrolyte cannot be applied to medium and low temperature conditions, and achieve the effect of high power density and high conductivity

Inactive Publication Date: 2017-09-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional electrolytes are no longer suitable for medium and low temperature conditions, so it is necessary to seek electrolytes with high conductivity at medium and low temperatures

Method used

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  • Dual-doped medium-temperature solid oxide fuel cell electrolyte and preparation method thereof
  • Dual-doped medium-temperature solid oxide fuel cell electrolyte and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Ce 0.85 La 0.11 Cd 0.04 o 2-α (0<α≦0.095) (CLCO) preparation method

[0020] 1) Weigh the raw materials according to the stoichiometric ratio: e(NO 3 ) 3 ·6H 2 O,La(NO 3 ) 3 ·nH 2 O,Cd(NO 3 ) 2 4H 2 O,

[0021] The complexing agent citric acid is weighed according to [n(CA):n(metal cation)=1.5:1].

[0022] 2) Ce(NO 3 ) 3 ·6H 2 O,La(NO 3 ) 3 ·nH 2 O, Cd(NO 3 ) 2 4H 2 O and citric acid were dissolved in deionized water respectively;

[0023] 3) Mix the above solutions and stir well

[0024] 4) Put the mixed solution obtained in step 3) into a stirrer and heat to 45°C, stir continuously at 45°C, and keep the pH value of the solution at 7 by adding ammonia water during the stirring process until a gel is formed;

[0025] 5) Move the gel into an evaporating dish and heat it on an electric furnace until self-propagating combustion occurs to form a fluffy oxide powder;

[0026] 6) Calcining at 600°C for 30 minutes to remove organic matter, and then cal...

Embodiment 2

[0036] Preparation of discs: Put the CLCO powder prepared in Example 1 into a mold, and under a pressure of 300 MPa, make discs with a diameter of 13 mm ± 0.1 mm and a thickness of 0.5 mm ± 0.1 mm. Heating at a heating rate of 3°C to 1350°C for 4 hours to obtain the required electrolyte disc.

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Abstract

The invention belongs to the field of preparation of solid electrolytes, and particularly relates to a dual-doped medium-temperature solid oxide fuel cell electrolyte and a preparation method thereof. The medium-temperature solid oxide fuel cell electrolyte is prepared by a nitrate gel combustion method; the molecular formula is Ce0.85La0.11Cd0.04O2-alpha, and alpha is greater than 0, and smaller than or equal to 0.095; the relative density reaches 98% or above. The ion conductivity of the electrolyte reaches 1.45*10<-2>S / cm in an air atmosphere at the temperature of 700 DEG C.

Description

technical field [0001] The invention belongs to the field of preparation of solid electrolytes, and in particular relates to a double-doped intermediate temperature solid oxide fuel cell electrolyte and a preparation method thereof. Background technique [0002] With the development of global industry and the rapid growth of population, the resources on the earth will become more and more scarce. According to the statistical structure of the US Energy Information Administration (EIA), the world's energy demand has reached 10.6 billion tons of oil equivalent in 2010, and it is predicted that it will reach 13.65 billion tons of oil equivalent in 2025. The traditional power generation methods mostly convert the chemical energy in fossil energy such as oil and natural gas into heat energy through combustion, and then use the heat energy to drive mechanical equipment to generate mechanical energy, and finally convert it into electrical energy. This kind of energy conversion is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016H01M8/1246
CPCH01M8/1016H01M8/1246H01M2300/0071Y02E60/50
Inventor 彭开萍刘建
Owner FUZHOU UNIV