Positive electrode material provided with pomegranate fruit structure for solid-oxide fuel cell and preparation of positive electrode material

A fuel cell cathode and solid oxide technology, which is applied to battery electrodes, structural parts, circuits, etc., can solve problems such as reducing battery performance

Active Publication Date: 2016-07-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Due to the high sintering temperature of the electrode, the cerium-based electrolyte will also react with YSZ to form a high-resistance phase cerium-zirconium solid solution, which will reduce the performance of the battery

Method used

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  • Positive electrode material provided with pomegranate fruit structure for solid-oxide fuel cell and preparation of positive electrode material

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Embodiment 1

[0021] Example 1 Prepare a battery with LSCF-GDC&YSZ nanocomposite cathode.

[0022] 1) First prepare the YSZ skeleton, using the composite of NiO:YSZ=45:55 as the anode substrate, (Y 2 o 3 ) 0.08 (ZrO2) 0.92 It is an anolyte membrane two-in-one assembly of an electrolyte membrane, and a YSZ skeleton is prepared on the electrolyte membrane, and the composition of YSZ is (Y 2 o 3 ) 0.08 (ZrO2) 0.92 . The amount of YSZ material and n-butanol, PVB, fish oil, pore-forming agent [flake graphite: PMMA=50:50% (mass ratio)] and binder is (mass ratio), 11.0:51.2:22.0:0.4: 11.0:4.4, after the above mixture is ultrasonically mixed, it is coated on the electrolyte membrane side of the anode electrolyte membrane two-in-one component, and placed in a high-temperature furnace for sintering with programmed temperature rise. The programmed temperature rise system is as follows: heating rate 1°C / min The temperature was raised to 280°C and kept for 30 minutes; the temperature was raised ...

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Abstract

The invention relates to high-performance and intermediate- and low-temperature composite positive electrode material with a pomegranate fruit structure for a solid-oxide fuel cell. The composite positive electrode is particularly an LSCF-GDC & YSZ nanometer composite positive electrode in which an LSCF-GDC pomegranate seed layer is attached onto an YSZ framework diaphragm, wherein the size of pomegranate seed LSCF-GDC particle is 10-20 nanometers, and the YSZ diaphragm is formed by connecting particles of around 200 nanometers. The positive electrode with such structure has a relatively long three-phase boundary, and the YSZ diaphragm is grown with an electrolyte membrane after high-temperature sintering to form a smooth ionic conductive passage; and moreover, with the addition of GDC in the LSCF-GDC nanometer composite particle, Sr is prevented from being enriched in an LSCF surface, thus, the generation of a high-resistance phase SrZrO<3> is prevented, and the performance and the stability of the electrode are remarkably improved.

Description

technical field [0001] The invention relates to a high-performance medium-low temperature solid oxide fuel cell composite cathode with a pomegranate fruit structure, specifically a LSCF-GDC&YSZ nanocomposite cathode in which LSCF-GDC "pomegranate seeds" are layered on a YSZ skeleton "diaphragm". Background technique [0002] Solid Oxide Fuel Cell (SOFC) is an energy conversion device that directly converts chemical energy in fuel into electrical energy. It can be used for portable power supply, cogeneration and large power generation equipment. It has high efficiency, no pollution, and a wide range of fuel options. Widely, hydrocarbons such as hydrogen, methane, and biogas can be used as fuels for solid oxide fuel cells, and have broad application prospects, so they have become a hot research topic for many scholars. High-temperature solid oxide fuel cells require expensive lanthanum chromate as a connector, and the cost is extremely high, which is not conducive to the appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 程谟杰张小敏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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