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Transition metal element B site-doped BaFeO3-delta-based ABO3 type perovskite fuel cell cathode material and application thereof

A transition metal element, fuel cell cathode technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effect of enhancing mixed electrical conductivity, improving performance, and good oxygen catalytic reduction activity

Inactive Publication Date: 2011-10-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preferably 0.05≤x≤0.2; -0.5<δ<0.5

Method used

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  • Transition metal element B site-doped BaFeO3-delta-based ABO3 type perovskite fuel cell cathode material and application thereof
  • Transition metal element B site-doped BaFeO3-delta-based ABO3 type perovskite fuel cell cathode material and application thereof
  • Transition metal element B site-doped BaFeO3-delta-based ABO3 type perovskite fuel cell cathode material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: BaNb 0.05 Fe 0.95 o 3-δ Preparation of cathode material (solid phase method)

[0022] BaNb 0.05 Fe 0.95 o 3-δ Synthesized by high-temperature solid-phase method. According to the target product ratio, the stoichiometric ratio of BaCO 3 (analytical pure), Nb 2 o 3 (analytical pure), Fe 2 o 3 (analytical pure) mixed, using alcohol or acetone as the medium, ball milled in a high-energy ball mill (FRITSCH, Pulverisette 6) for 1 hour until the mixture is uniform, and the mixture is further evaporated and solidified at 250 ° C. After drying is complete, the precursor body, and finally bake the precursor at 1250°C for 10h to obtain the desired BaNb 0.05 Fe 0.95 o 3-δ Cathode material, wherein -0.5figure 1 The XRD powder diffraction method shown in (a) shows that BaNb 0.05 Fe 0.95 o 3-δ A phase-pure perovskite structure is formed.

Embodiment 2

[0023] Example 2: BaNb 0.1 Fe 0.9 o 3-δ Preparation of cathode material (solid phase method)

[0024] BaNb 0.1 Fe 0.9 o3-δ Synthesized by high-temperature solid-phase method. According to the target product ratio, the stoichiometric ratio of BaCO 3 (analytical pure), Nb 2 o 3 (analytical pure), Fe 2 o 3 (analytical pure) mixed, using alcohol or acetone as the medium, ball milled in a high-energy ball mill (FRITSCH, Pulverisette 6) for 2 hours until the mixture is uniform, and the mixture is further evaporated and solidified at 240 ° C. After drying is complete, the precursor body, and finally bake the precursor at 1300°C for 5h to obtain the desired BaNb 0.1 Fe 0.9 o 3-δ Cathode material, wherein -0.5figure 1 The XRD powder diffraction method shown in (a) shows that BaNb 0.1 Fe 0.9 o 3-δ A phase-pure perovskite structure is formed.

Embodiment 3

[0025] Example 3: BaNb 0.2 Fe 0.8 o 3-δ Preparation of cathode material (solid phase method)

[0026] BaNb 0.2 Fe 0.8 o 3-δ Synthesized by high-temperature solid-phase method. According to the target product ratio, the stoichiometric ratio of BaCO 3 (analytical pure), Nb 2 o 3 (analytical pure), Fe 2 o 3 (analytical pure) mixed, using alcohol or acetone as the medium, ball milled in a high-energy ball mill (FRITSCH, Pulverisette 6) for 3 hours until the mixture is uniform, and the mixture is further evaporated and solidified at 200 ° C. After drying is complete, the precursor body, and finally bake the precursor at 1350°C for 20h to obtain the desired BaNb 0.2 Fe 0.8 o 3-δ Cathode material, wherein -0.5figure 1 The XRD powder diffraction method shown in (a) shows that BaNb 0.2 Fe 0.8 o 3-δ A phase-pure perovskite structure is formed.

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Abstract

The invention discloses a transition metal element B site-doped BaFeO3-delta-based ABO3 type perovskite fuel cell cathode material. The material is characterized in that: the material is a perovskite oxide, the molecular formula of which is BaMxFe1-xO3-delta, wherein M is one of Ti, V, Cr, Mn, Ni, Cu, Zn, Zr, Nb and Mo; x is more than 0 and less than 1; and delta is oxygen hole concentration and is more than -1 and less than 1. The cathode material and the traditional electrolyte such as yttria stabilized zirconia (YSZ), samaria-doped ceria (SDC) and the like have matched thermal expansion coefficients, and the cathode material shows mixed electric conductivity of oxygen ions and electrons in the air atmosphere. The material shows good oxygen reduction activity in a temperature range of between 500 and 800 DEG C, and is suitable for medium and low-temperature solid oxide fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to BaFeO doped with a small amount of transition metal element B-site 3-δ base ABO 3 Type perovskite cathode materials for low-temperature solid oxide fuel cells. Background technique [0002] As an electrochemical energy conversion device, the solid oxide fuel cell directly converts the chemical energy in the fuel into electrical energy, and has the outstanding advantages of high energy conversion efficiency and low pollutant emission. The traditional SOFC cathode material is La 1-x Sr x MnO 3 (LSM), due to its relationship with Y 2 o 3 Stable ZrO 2 (YSZ) electrolyte has outstanding advantages such as excellent compatibility, high chemical and structural stability, and high electronic conductivity, and it is still the most commonly used high-temperature cathode material at present. A remarkable feature of LSM is that it is a pure electronic conductor in the absence of a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/86
CPCY02E60/50
Inventor 邵宗平董飞飞陈登洁冉然
Owner NANJING UNIV OF TECH
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