Electrolyte material and preparation method for intermediate and low-temperature solid oxide fuel cells

A solid oxide and electrolyte material technology, applied in solid electrolyte fuel cells, fuel cells, circuits, etc., can solve the problems of difficulty in sintering, lowering the open circuit voltage of the battery, and high sintering temperature, and achieves enhanced electrical conductivity, increased open circuit voltage, and improved performance effect

Inactive Publication Date: 2014-05-28
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a price change problem for Ce ions. In a reducing atmosphere, Ce4+ will be reduced to Ce3+ to form electronic conductance, causing an internal short circuit, which will reduce the open circuit voltage of the battery, and CeO 2 Higher sintering temperature, not easy to sinter

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  • Electrolyte material and preparation method for intermediate and low-temperature solid oxide fuel cells
  • Electrolyte material and preparation method for intermediate and low-temperature solid oxide fuel cells
  • Electrolyte material and preparation method for intermediate and low-temperature solid oxide fuel cells

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preparation example Construction

[0017] A method for preparing an electrolyte material for a medium-low temperature solid oxide fuel cell, comprising the following steps: preparing by a sol-gel method, adding Sm(NO 3 ) 3 , In(NO 3 ) 3 , Ce(NO 3 ) 3 According to the proportion of the target product

[0018] In deionized water, make a mixed nitrate solution, add an appropriate amount of citric acid according to the total number of metal ions: the molar ratio of citric acid is 1: 1.5, and use ammonia water to adjust the pH value of the solution to about 7, and stir the clarified The precursor solution was evaporated on a heating platform at 100 °C to remove water to make it into a gel, and then placed in an electric furnace to burn to form a powdery solid precursor. Finally, the solid precursor was roasted in a muffle furnace at 600 °C for 3 hours to obtain the obtained Required Sm x In y Ce 1-x-y o 2-δ Electrolyte powder material.

[0019] Medium and low temperature solid oxide fuel cell electrolyte m...

Embodiment 1

[0021] Prepared by sol-gel method, Sm(NO 3 ) 3 , In(NO 3 ) 3 , Ce(NO 3 ) 3 Dissolve in deionized water according to the proportion of the target product, and make a mixed nitrate solution, add an appropriate amount of citric acid according to the total number of metal ions: the molar ratio of citric acid is 1:1.5, and use ammonia water to adjust the pH value of the solution to about 7, The stirred and clarified precursor solution is evaporated on a heating platform at 100°C to remove water to make it into a gel, and then placed in an electric furnace to burn to form a powdery solid precursor, and finally the solid precursor is roasted in a muffle furnace at 600°C 3h, get the required Sm x In y Ce 1-x-y o 2-δ Electrolyte powder material, where 0.01figure 1 The XRD powder diffraction method shown shows that Sm x In y Ce 1-x-y o 2-δ A pure-phase fluorite structure is formed without other impurity phases.

[0022] The anode substrate is made of NiO, oxygen ion conduct...

Embodiment 2

[0025] Prepared by sol-gel method, Sm(NO 3 ) 3 , In(NO 3 ) 3 , Ce(NO 3 ) 3 Dissolve in deionized water according to the proportion of the target product, and make a mixed nitrate solution, add an appropriate amount of citric acid according to the total number of metal ions: the molar ratio of citric acid is 1:1.5, and use ammonia water to adjust the pH value of the solution to about 7, The stirred and clarified precursor solution is evaporated on a heating platform at 100°C to remove water to make it into a gel, and then placed in an electric furnace to burn to form a powdery solid precursor, and finally the solid precursor is roasted in a muffle furnace at 600°C 3h, get the required Sm x In y Ce 1-x-y o 2-δ Electrolyte powder material, where 0.01figure 1 The XRD powder diffraction method shown shows that Sm x In y Ce 1-x-y o 2-δ A pure-phase fluorite structure is formed without other impurity phases.

[0026] The anode substrate is made of NiO, oxygen ion conduct...

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Abstract

The invention discloses an electrolyte material intermediate and low-temperature solid oxide fuel cells. The molecular formula of the electrolyte material is SmxInyCe1-x-yO2-delta, wherein x is more than 0.01 and less than 1, y is more than 0.01 and less than 1, and delta is oxygen vacancy concentration and is more than -0.5 and less than 0.5. The electrolyte material has the following advantages: through codoping and substitution of elemental In and elemental Sm at the Ce site of a CeO2-delta base, performance and conductivity of the electrolyte material are improved; since elemental In has high electronegativity, electrons can be adsorbed onto the periphery of elemental In, so free electrons in a CeO2-based electrolyte are reduced, the phenomenon of short circuit in a cell is improved, and the open-circuit voltage of a cell prepared from the electrolyte material is increased; the material has a temperature range of 500 to 800 DEG C, has good oxygen ion conductivity and small electron conductivity in an air atmosphere compared with traditional Sm-doped CeO2, enables a cell to have high open-circuit voltage at a same temperature, overcomes the problems of low sintering activity and low cell open-circuit voltage of CeO2 and is an ideal material for electrolytes of intermediate and low-temperature solid oxide fuel cells.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an electrolyte material and a preparation method for a medium-low temperature solid oxide fuel cell. Background technique [0002] Fuel cell is an efficient and environment-friendly electrochemical energy conversion device. Due to its high power generation efficiency and environmental friendliness, fuel cell has become the focus of current research and is regarded as one of the most effective technologies to solve current energy and environmental problems. , so it has attracted the attention of countries all over the world, and it is also a priority support project in my country's "New Energy and Renewable Energy Development Outline". Among them, the medium and low temperature solid oxide fuel cell uses a ceramic electrolyte and an all-solid structure. In addition to the advantages of ordinary fuel cell systems, it also has unique advantages such as no corrosion, no leakage, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10
CPCH01M8/126H01M2008/1293Y02E60/50
Inventor 陶泽天侯贵华张勤芳董鹏玉许宁
Owner YANCHENG INST OF TECH
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