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Low temperature solid-oxide fuel battery three-in-one component MEA and preparation thereof

A solid oxide and fuel cell technology, applied in the direction of solid electrolyte fuel cells, fuel cell grouping, fuel cell components, etc., can solve the problem of large interface resistance, reduce interface resistance, improve battery efficiency, and improve contact strength Effect

Inactive Publication Date: 2008-11-12
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] In order to solve the problem of large interface resistance between the electrolyte and the cathode in the low-temperature solid oxide fuel cell, the object of the present invention is to provide a low-temperature solid oxide fuel cell with a perovskite composite oxide transition layer structure and its preparation method, by introducing a transition layer composed of a perovskite composite oxide material between the electrolyte and the cathode to promote the effective contact between the electrolyte and the cathode and reduce the interface resistance between the electrolyte / cathode, thereby effectively improving the battery output power

Method used

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  • Low temperature solid-oxide fuel battery three-in-one component MEA and preparation thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Flat Low Temperature Solid Oxide Fuel Cell with LSM as Transition Layer

[0026] Such as figure 1 Shown is a schematic diagram of the structure of an anode-supported low-temperature solid oxide fuel cell with a perovskite-type composite oxide transition layer, including an anode substrate 1, a cerium-based electrolyte diaphragm layer 2, a perovskite-type composite oxide transition layer 3 and Cathode 4. The NiO-GDC / GDC two-in-one was prepared by dry pressing, in which the GDC electrolyte was synthesized by glycine method, and the two-in-one was co-fired at 1420°C for 4 hours to obtain the anode / electrolyte assembly. Prepare an LSM transition layer with a thickness of 500 nm on the side of the GDC electrolyte by casting method, dry it in the air, and bake it at a temperature lower than 120 °C for 2 hours to obtain a porous LSM transition layer.

[0027] The BSCF-GDC composite cathode was prepared by coating method, in which the BSCF content was 70%, and baked at 950°C ...

Embodiment 2

[0030] Flat Low Temperature Solid Oxide Fuel Cell Using LSGM as Transition Layer

[0031] The NiO-SDC / SDC two-in-one was prepared by casting method, in which the SDC electrolyte was synthesized by citric acid method, and the two-in-one was co-fired at 1450 °C for 4 hours to obtain the anode / electrolyte assembly. Prepare a LSGM transition layer with a thickness of 0.75 microns on the side of the SDC electrolyte by casting method, dry it in the air, and bake it at a temperature lower than 200°C for 2 hours to obtain a porous LSGM transition layer.

[0032] The BSCF-SDC composite cathode was prepared by screen printing method, in which the BSCF content was 70%, and baked at 950°C for 2 hours.

[0033] Using hydrogen as fuel gas and oxygen as oxidant, test battery performance at 500-600°C. The maximum power density reaches 0.91W cm at 600°C -2 , which is 58.5% higher than that of the battery with the same conditions but without a transition layer.

Embodiment 3

[0035] Flat Low Temperature Solid Oxide Fuel Cell Using LSCF as Transition Layer

[0036] The flat-plate NiO-GDC / GDC two-in-one was prepared by rolling film method and baked at 1500 ° C. The LSCF transition layer with a thickness of 500 nm was prepared on the electrolyte side by spraying method. The GDC and LSCF materials were prepared by citric acid method. Baking the electrolyte at a temperature of 200° C. for 1 hour to obtain a dense anode / electrolyte assembly with both the electrolyte and the transition layer.

[0037] The BSCF-GDC composite cathode was prepared by screen printing method, in which the BSCF content was 70%, and it was baked at 1000℃ for 2 hours.

[0038] Using hydrogen as fuel gas and air as oxidant, test battery performance at 500-600°C. The maximum power density reaches 0.3W·cm at 500℃ -2 , which is 31.2% higher than that of the battery with the same conditions but without a transition layer.

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Abstract

The invention discloses a three-in-one component MEA of a low temperature solid oxide fuel cell and a preparation thereof, which comprises an anode substrate, an electrolyte diaphragm layer and a cathode, wherein, a perovskite-type oxide transition layer is arranged between the electrolyte diaphragm layer and the cathode. Under the same condition, the performance of the low temperature solid oxide fuel cell prepared by using the method can be increased by more than 30 percent compared with the cell that has no diaphragm layer added.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells, in particular to a high-performance low-temperature solid oxide fuel cell (working temperature 500-650°C) three-in-one component MEA with a perovskite composite oxide transition layer structure and its Preparation. 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 for decentralized power generation and centralized power stations, and can also be used for vehicle auxiliary power supplies, portable power supplies, etc. In order to reduce manufacturing costs, improve reliability, and shorten start-up time, low-temperature solid oxide fuel cells that lower the operating temperature of solid oxide fuel cells to 500-650 °C have become the focus of resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M8/24H01M4/86H01M4/88H01M8/1004
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 程谟杰杨敏董永来
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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