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Application of tin-containing nanometer oxide to cathode of low-temperature solid oxide fuel cell

A fuel cell cathode, nano-oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of cathode stability and poor anti-carbon dioxide poisoning ability, and achieve strong anti-CO2 poisoning ability, high stability, high active effect

Inactive Publication Date: 2015-09-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The new materials and preparation methods invented by the above patents can improve the medium and low temperature performance of solid oxide fuel cells, but the stability of the cathode and the ability to resist carbon dioxide poisoning are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] sn 0.5 Ce 0.5 o 2-δ Nanomaterials modify LSM-YSZ to form a composite cathode.

[0031] sn 0.5 Ce 0.5 o 2-δ The solution is synthesized by the ammonium citrate method, and the molar contents of Sn and Ce elements are 50% and 50% respectively. Weigh SnCl 4 .5H 2 O17.53g, add 100mL deionized water, precipitate with ammonia water after completely dissolved, filter and wash the precipitate 3 times, remove Cl ions in the precipitate, add the filter cake to 100mL ammonia water, heat and stir until completely dissolved, and calibrate the Sn 4+ The concentration is 0.4mol.L -1 . Weigh Ce(NO 3 ) 3 .6H 2 O, 10.8555g, then add 10ml of deionized water, add 12.161g of ammonium citrate (the ratio of metal ion to ammonium citrate is 1:1), after it is completely dissolved, add 62ml of Sn 4+ solution, use a volumetric flask to obtain 0.5mol.L -1 solution.

[0032] Prepare NiO-YSZ / YSZ / LSM-YSZ cells according to Comparative Example 1, then impregnate the prepared solution in...

Embodiment 2

[0035] sn 0.2 Gd 0.8 o 2-δ Nanomaterials modify LSM-YSZ to form a composite cathode.

[0036] sn 0.2 Gd 0.8 o 2-δ The solution is synthesized by the ammonium citrate method, and the molar contents of Sn and Gd elements are 20% and 80% respectively. Weigh SnCl 4 .5H 2 O17.53g, add 100mL deionized water, precipitate with ammonia water after completely dissolved, filter and wash the precipitate 3 times, remove Cl ions in the precipitate, add the filter cake to 100mL ammonia water, heat and stir until completely dissolved, and calibrate the Sn 4+ The concentration is 0.4mol.L -1 . Weigh Gd(NO 3 ) 3 .6H 2 O, 18.0522g, then add 20ml of deionized water, add 12.161g of ammonium citrate (the ratio of metal ion to ammonium citrate is 1:1), after it is completely dissolved, add 25ml of Sn 4+ solution, use a volumetric flask to obtain 0.5mol.L -1 solution.

[0037] Prepare NiO-YSZ / YSZ / LSM-YSZ cells according to Comparative Example 1, then impregnate the prepared solution in...

Embodiment 3

[0040] sn 0.5 La 0.5 o 2-δ Nanomaterials modify LSF-GDC to form a composite cathode.

[0041] sn 0.5 La 0.5 o 2-δ The solution was synthesized by the ammonium citrate method, and the molar contents of Sn and La elements were 50% and 50% respectively. Weigh SnCl 4 .5H 2 O17.53g, add 100mL deionized water, precipitate with ammonia water after completely dissolving, filter and wash the precipitate 3 times, remove Cl ions in the precipitate, add the filter cake to 100mL ammonia water, heat and stir until completely dissolved, and calibrate the Sn 4+ The concentration is 0.4mol.L -1 . Weigh La(NO 3 ) 3 .6H 2 O, 10.7332g, then add 10ml of deionized water, add 12.161g of ammonium citrate (the ratio of metal ion to ammonium citrate is 1:1), after it is completely dissolved, add 62ml of Sn 4+ solution, use a volumetric flask to obtain 0.5mol.L -1 solution.

[0042] Prepare NiO-YSZ / YSZ / GDC / LSF-GDC cells according to Comparative Example 2, then impregnate the prepared solu...

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PUM

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Abstract

The invention discloses an application of tin-containing nanometer oxide to a cathode of a low-temperature solid oxide fuel cell. The application is mainly characterized in that the tin-containing nanometer oxide is represented as Sn<x>Ln<1-x>O<2-delta>, wherein Ln is one or more of La, Ce, Pr, Sm, Gd, Er, Yb, Y and Sc; x is more than or equal to 0.02 and less than or equal to 1; delta is more than or equal to 0 and less than or equal to 0.5; and the particle size is 5-50 nanometers. The cathode consists of the tin-containing nanometer oxide, perovskite structure oxide and fluorite structure oxide. The cathode has very high activity, very high stability and very high carbon dioxide poisoning resistance in low-temperature solid oxide.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the application in low-temperature solid oxide fuel cells to obtain low-temperature solid oxide fuel cell cathode materials with high performance, high stability and strong ability to resist carbon dioxide poisoning. Background technique [0002] Cost is currently the main factor restricting the commercial application of solid oxide fuel cells (SOFCs), and the high cost is mainly due to the high operating temperature of SOFC, so reducing the operating temperature of SOFC is the current development trend and research hotspot in the field of SOFC. For Ni-YSZ as the anode, YSZ as the electrolyte and traditional perovskite materials as the cathode, the polarization loss of the battery mainly comes from the cathode polarization. When the operating temperature decreases, the cathode polarization is the main factor restricting the performance of the battery. . In order to improve the medium a...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/86
CPCH01M4/86H01M4/8652H01M4/9016H01M2004/8684Y02E60/50
Inventor 程谟杰刘丽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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