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Membrane electrode component of medium temperature solid-oxide fuel cell and preparation thereof

A fuel cell membrane and solid oxide technology, applied in solid electrolyte fuel cells, fuel cell components, fuel cells, etc., can solve problems such as large interface resistance, achieve lower interface resistance, stable and reliable bonding, and improved battery performance Effect

Active Publication Date: 2009-01-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a medium temperature solid oxide fuel cell membrane electrode assembly and its preparation. For the problem of large interface resistance between cathodes, the present invention promotes the interaction between the electrolyte membrane and the medium-temperature cathode by introducing a transition layer composed of zirconium-based electrolyte materials and perovskite-type cathode materials between the zirconium-based electrolyte membrane and the medium-temperature cathode. The effective contact between them reduces the interface resistance between the electrolyte membrane / medium temperature cathode, thereby effectively improving the output power density and stability of the battery

Method used

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  • Membrane electrode component of medium temperature solid-oxide fuel cell and preparation thereof

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Embodiment 1

[0024] Membrane electrode assembly MEA for flat medium temperature solid oxide fuel cell with YSZ-LSM composite as transition layer and LDC-LSM as cathode

[0025] Such as figure 1Shown is a schematic structural diagram of an anode-supported medium-temperature solid oxide fuel cell membrane electrode assembly MEA with a transition layer, which consists of an anode substrate 1, a zirconium-based electrolyte membrane 2, a transition layer 3 and a medium-temperature cathode 4 from bottom to top. The anode substrate is composed of 40% NiO and 60% YSZ. An 800 micron thick NiO-YSZ anode substrate is prepared by rolling film method, and a layer of organic slurry with a thickness of 25 micron YSZ is coated on it. After drying, it was pressed under a pressure of 100 MPa, and the two-in-one was co-fired at 1400° C. for 5 hours to obtain an anode / electrolyte membrane assembly.

[0026] YSZ powder was synthesized by hydrothermal method. where Y 2 o 3 The molar doping level is 8%. Aft...

Embodiment 2

[0030] Flat-plate intermediate temperature solid oxide fuel cell membrane electrode assembly MEA with YSZ-LSM composite as transition layer and GDC-LSM as cathode

[0031] The anode substrate is composed of 45% NiO and 55% YSZ. A 1000 micron thick NiO-YSZ anode substrate is prepared by casting method, and a layer of organic slurry containing 20 micron YSZ is coated on it. After drying, it was pressed under a pressure of 100 MPa, and the two-in-one was co-fired at 1450° C. for 5 hours to obtain an anode / electrolyte membrane assembly.

[0032] YSZ powder was synthesized by co-precipitation method. where Y 2 o 3 The molar doping level is 9%. After mixing YSZ and LSM, the content of LSM is 50%, and then uniformly mixed with the binder to make a slurry, which is prepared on the surface of the YSZ electrolyte membrane by casting method, at a temperature lower than 300°C for burning the electrolyte membrane Calcined for 2 hours to obtain a porous YSZ-LSM transition layer.

[003...

Embodiment 3

[0036] Tubular intermediate temperature solid oxide fuel cell membrane electrode assembly MEA with YSZ-LSM composite as transition layer and SDC-LSM as cathode

[0037] The anode substrate is composed of 50% NiO and 50% YSZ. An 800-micron thick tubular NiO-YSZ anode substrate is prepared by extrusion molding, and a layer of organic slurry with a thickness of 20 microns YSZ is loaded on the anode by spraying. After drying, the two-in-one was co-fired at 1450° C. for 5 hours to obtain an anode / electrolyte membrane assembly.

[0038] YSZ powder was synthesized by combustion method. where Y 2 o 3 The molar doping amount is 10%. After mixing YSZ and LSM, the content of LSM is 60%, and then uniformly mixed with the binder to make a slurry, which is prepared on the surface of the YSZ electrolyte membrane by spraying, and baked at 1200 ° C for 2 hours to obtain a porous YSZ -LSM transition layer.

[0039] Sm and Ce nitrates were impregnated on LSM by nitrate impregnation method, ...

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Abstract

The invention relates to a solid oxide fuel cell, in particular to an intermediate-temperature solid oxide fuel cell membrane electrode component and a preparation thereof. The solid oxide fuel cell membrane electrode assembly comprises an anode substrate, a zirconium-based electrolyte membrane and an intermediate-temperature cathode, wherein, the intermediate-temperature cathode is made of 40-80% of perovskite type cathode material and 20-60% of cerium-based electrode material; and a transition layer made of 20-60% of the zirconium-based electrolyte material and 40-80% of the perovskite type cathode material is prepared between the zirconium-based electrolyte membrane and the intermediate-temperature cathode. The intermediate-temperature solid oxide fuel cell prepared by adopting the method of the invention improves the performance of the solid oxide fuel cell by more than 65% compared with that of the cell without the transition layer, and the combination of the intermediate-temperature cathode and the electrolyte membrane is more stable and reliable, which improves the operation stability and the thermal cycling stability of the cell.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, in particular to a medium temperature solid oxide fuel cell membrane electrode assembly MEA with a transition layer and a preparation method thereof, including an anode substrate, a zirconium-based electrolyte membrane and a medium temperature cathode, the medium temperature cathode consists of 40- Composed of 80% perovskite cathode material and 20-60% cerium-based electrolyte material, a layer of 20-60% zirconium-based electrolyte material and 40-80% perovskite type is prepared between the zirconium-based electrolyte membrane and the medium-temperature cathode The transition layer composed of cathode material. Background technique [0002] Solid oxide fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. It adopts an all-solid structure and has the characteristics of high power generation efficiency and wide application range. It is an ideal technology ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M8/02H01M4/88H01M4/90H01M8/10H01M8/1253H01M8/126
CPCY02E60/521Y02E60/50
Inventor 程谟杰张敏董永来
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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