High-catalytic activity composite negative electrode material of intermediate-temperature solid oxide fuel cell and preparation method of composite negative electrode material

A solid oxide, high catalytic activity technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of poor catalytic activity of oxygen reduction, and achieve the effect of short preparation cycle, simple preparation process and low cost

Inactive Publication Date: 2016-08-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of poor oxygen reduction catalytic activity of the medium-temperature SOFC cathode and the deficiency of the existing composite cathode preparation technology, the present invention provi

Method used

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  • High-catalytic activity composite negative electrode material of intermediate-temperature solid oxide fuel cell and preparation method of composite negative electrode material
  • High-catalytic activity composite negative electrode material of intermediate-temperature solid oxide fuel cell and preparation method of composite negative electrode material
  • High-catalytic activity composite negative electrode material of intermediate-temperature solid oxide fuel cell and preparation method of composite negative electrode material

Examples

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Embodiment 1

[0023] Example 1: Preparation of medium temperature SOFC composite cathode PrBa by synchronous sintering reaction method 0.92 co 2 o 6-δ -Sm 0.2 Ce 0.8 o 1.9 , Sm in the composite cathode 0.2 Ce 0.8 o 1.9 The mass percent content is 40%.

[0024] (1) PrBa 0.92 co 2 o 6-δ Synthetic solution (solution I) preparation

[0025] According to the preparation of 16.036g PrBa 0.92 co 2 o 6-δ -Sm 0.2 Ce 0.8 o 1.9 Composite cathode, weigh 22.91g EDTA, dissolve in 100ml deionized water under magnetic stirring, add NH 3 ·H 2 O adjusts pH ≈ 6 to form EDTA-NH 3 solution; then weigh Pr(NO 3 ) 3 ·6H 2 O 8.70g, Ba(NO 3 ) 2 4.809g, Co(NO 3 ) 3 ·6H 2 O 11.641g, it was completely dissolved in the above EDTA-NH under magnetic stirring 3 In the solution, an EDTA-metal salt solution is formed, and the molar amount of EDTA in the solution is related to the metal ion Pr 3+ 、Ba 2+ with Co 3+ the same total molar weight; then weigh 32.95g citric acid and dissolve it in 100...

Embodiment 2

[0031] Example 2: Preparation of medium temperature SOFC composite cathode Pr by synchronous sintering reaction method 0.95 BaCo 2 o 6-δ -Gd 0.1 Ce 0.9 o 1.95 , Gd in the composite cathode 0.1 Ce 0.9 o 1.95 The mass percentage content of is 50%.

[0032] (1)Pr 0.95 BaCo 2 o 6-δ Synthetic solution (solution I) preparation

[0033] According to the preparation of 9.701g Pr 0.95 BaCo 2 o 6-δ -Gd 0.1 Ce 0.9 o 1.95 Composite cathode, weigh 11.544g EDTA, dissolve it in 150ml deionized water under magnetic stirring, add NH 3 ·H 2 O adjusts pH ≈ 6 to form EDTA-NH 3 solution; then weigh Pr(NO 3 ) 3 ·6H 2 O 4.133g, Ba(NO 3 ) 2 2.613g, Co(NO 3 ) 3 ·6H 2 O 5.821g, it was completely dissolved in the above EDTA-NH under magnetic stirring 3 In the solution, an EDTA-metal salt solution is formed, and the molar amount of EDTA in the solution is related to the metal ion Pr 3+ 、Ba 2+ with Co 3+ the same total molar weight; then weigh 16.601g of citric acid and diss...

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Abstract

The invention relates to a high-catalytic activity composite negative electrode material of an intermediate-temperature solid oxide fuel cell and a preparation method of the composite negative electrode material, and belongs to the technical field of an energy material. The composite negative electrode comprises a perovskite structured oxide PrBa<1-x>Co<2>O<6-Delta>, Pr<1-y>BaCo<2>O<6-Delta> or Pr<1-n>Ba<1-m>Co<2>O<6-Delta> in the absence of A-position cation and an oxygen ion conductor material Sm<0.2>Ce<0.8>O<1.9> or Gd<0.1>Ce<0.9>O<1.95>, wherein the mass percent of the oxygen ion conductor material accounts for 20-50%. The preparation method of the composite negative electrode material comprises the following steps of firstly, respectively preparing synthesis solutions of two constituents; secondly, mixing and uniformly stirring the two solutions to obtain a mixed synthesis solution of the two constituents, and heating the mixed synthesis solution to obtain mixed precursor gel; and finally, carrying out high-temperature sintering reaction to obtain composite negative electrode powder. The composite negative electrode material is prepared by a synchronous sintering reaction method, the preparation method has the advantages of simplicity in process, short preparation period, low cost and high efficiency, and is easy to operate, and the oxygen reduction catalytic activity of the negative electrode of the intermediate-temperature solid oxide fuel cell is effectively improved.

Description

technical field [0001] The invention relates to a composite cathode material for a medium-temperature solid oxide fuel cell with high catalytic activity and a preparation method thereof, belonging to the technical field of energy materials. Background technique [0002] The medium-temperature solid oxide fuel cell (SOFC) with an operating temperature in the range of 600-800 ℃ is a kind of high-efficiency green alternative energy, and has a good application prospect in the fields of portable equipment, automobile auxiliary power supply and decentralized power supply system. A single SOFC cell is composed of a cathode, an electrolyte, and an anode, among which the cathode is the main factor limiting the output power of a medium-temperature SOFC. In order to improve the output power of SOFC, the cathode material must have high oxygen reduction catalytic activity, that is, low polarization resistance. Cobalt-based perovskite structure oxides are important medium-temperature SOF...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8652H01M4/8825Y02E60/50
Inventor 姜雪宁王姣贾国强郄子健
Owner DALIAN UNIV OF TECH
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