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Non-cobalt IT-SOFC (Intermediate-Temperature Solid Oxide Fuel Cell) stable anode material and application thereof

A solid oxide and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor structural stability and chemical stability at high temperature, performance degradation, and large thermal expansion coefficient

Active Publication Date: 2014-03-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the base layer used in this technology is a cobalt-containing perovskite material, which has poor high-temperature structural stability and chemical stability, and a large thermal expansion coefficient. Its thermal expansion coefficient does not match the electrolyte layers YSZ, SDC and GDC used. Working for a long time is prone to problems such as performance degradation and delamination cracking due to structural changes

Method used

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  • Non-cobalt IT-SOFC (Intermediate-Temperature Solid Oxide Fuel Cell) stable anode material and application thereof
  • Non-cobalt IT-SOFC (Intermediate-Temperature Solid Oxide Fuel Cell) stable anode material and application thereof
  • Non-cobalt IT-SOFC (Intermediate-Temperature Solid Oxide Fuel Cell) stable anode material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 0.1mol Nd x Sr 1-x Fe 0.8 Cu 0.2 o 3-δ (0.3≤x≤0.7) synthesis, structure test and cathode performance test.

[0035] First, 58.4484g of EDTA was dissolved in 100mL of ammonia water, and then Nd(NO 3 ) 3 ·6H 2 O powder (13.152-30.688g), Sr(NO 3 ) 2 Powder 10.5815g, Fe(NO 3 ) 3 9H 2 O powder 32.32g and Cu(NO 3 ) 2 ·3H 2 O powder 4.832g, be dissolved in the prepared EDTA solution, then add the citric acid of 57.6370g, the mol ratio of EDTA, citric acid and total metal ion is 1:1.5:1, then add ammonia water to adjust the solution The pH value is 6-10, heated to 50-100°C to form a uniform and transparent sol, and the heating time is further extended until the water evaporates to obtain a viscous gel, which is heat-treated at 200-400°C to obtain a fluffy precursor , the precursor can be calcined at 900-1200°C to obtain the required Nd 0.5 Sr 0.5 Fe 0.8 Cu 0.2 o 3-δ Powder.

[0036] Such as figure 1 shown, for Nd x Sr 1-x Fe 0.8 Cu 0.2 o 3-δ (0.3≤x≤0....

Embodiment 2

[0042] 0.05mol of Nd 0.3 Sr 0.7 Fe 0.8 Cu 0.2 o 3-δ synthesis and structural testing.

[0043] The EDTA of 29.2242g is dissolved in 80mL ammoniacal liquor, then the Nd(NO 3 ) 3 ·6H 2 O powder 6.576g, Sr(NO 3 ) 2 Powder 7.408g, Fe(NO 3 ) 3 9H 2 O powder 16.16g and Cu(NO 3 ) 2 ·3H 2O powder 2.416g, be dissolved in the prepared EDTA solution, then add the citric acid of 28.8185g, the mol ratio of EDTA, citric acid and total metal ion is 1:1.5:1, then add ammonia water to adjust the solution The pH value is 7, heated to 80°C to form a uniform and transparent sol, and the heating time is further extended until the water evaporates to obtain a viscous gel, which is heat-treated at 250°C to obtain a fluffy powder precursor. The body can be calcined at 1000°C to obtain the required Nd 0.3 Sr 0.7 Fe 0.8 Cu 0.2 o 3-δ Powder. Figure 5 for Nd 0.3 Sr 0.7 Fe 0.8 Cu 0.2 o 3-δ The XRD pattern of it shows that it is a perovskite structure.

Embodiment 3

[0045] 0.05mol of Nd 0.7 Sr 0.3 Fe 0.8 Cu 0.2 o 3-δ Synthesis, structure testing.

[0046] The EDTA of 29.2242g is dissolved in 80mL ammoniacal liquor, then the Nd(NO 3 ) 3 ·6H 2 O powder 15.344g, Sr(NO 3 ) 2 Powder 3.175g, Fe(NO 3 ) 3 9H 2 O powder 16.16g and Cu(NO 3 ) 2 ·3H 2 O powder 2.416g, be dissolved in the prepared EDTA solution, then add the citric acid of 28.8185g, the mol ratio of EDTA, citric acid and total metal ion is 1:1.5:1, then add ammonia water to adjust the solution The pH value is 8, heated to 80°C to form a uniform and transparent sol, and the heating time is further extended until the water evaporates to obtain a viscous gel, which is heat-treated at 250°C to obtain a fluffy powder precursor. The body can be calcined at 1000°C to obtain the required Nd 0.7 Sr 0.3 Fe 0.8 Cu 0.2 o 3-δ Powder. Figure 6 for Nd 0.7 Sr 0.3 Fe 0.8 Cu 0.2 o 3-δ The XRD pattern of it shows that it is a perovskite structure.

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Abstract

The invention relates to a non-cobalt IT-SOFC (Intermediate-Temperature Solid Oxide Fuel Cell) stable anode material and application thereof and belongs to the technical field of fuel cells. The A site of SrFeO3-delta is doped with Nd, and the B site of the SrFeO3-delta is doped with Cu, so that the prepared (Nd1-xSrx)a (Fe1-yCuy)bO3-detal (NSCFu) anode material has high oxygen reduction catalytic activity, and the electrochemical performance is greatly improved. The anode material has long-term stability, and meanwhile has the advantages of high electronic conductivity, and high chemical compatibility and thermal expansion compatibility with cerium-oxide-based electrolytes. Thus, the SOFC anode material is potential.

Description

technical field [0001] The invention relates to a material in the field of fuel cell technology, in particular to a non-cobalt-based intermediate temperature solid oxide fuel cell (SOFC) cathode material and its application as a cathode and a composite cathode. Background technique [0002] Solid Oxide Fuel Cells (Solid Oxide Fuel Cells, SOFCs) is a device that can directly convert fossil fuels into electrical energy with high efficiency and low emissions. An effective alternative energy source for emission reduction and sustainable development. Due to the high working temperature (800-1000°C), the traditional SOFC has poor stability at high temperature, short service life, high material cost, and strict requirements on battery maintenance and other ancillary equipment (such as connectors), etc., which seriously hinder its commercialization process. The medium and low temperature of SOFC (600-800°C) can expand the selection range of battery materials and connecting materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88
CPCY02E60/50H01M4/88H01M4/9016
Inventor 殷洁炜尹屹梅卢军马紫峰
Owner SHANGHAI JIAO TONG UNIV
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