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A low-temperature solid oxide fuel cell supported by porous metal and its preparation method

A solid oxide and fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of high ohmic impedance, low electrical conductivity, and inability to meet low-temperature SOFC working requirements, etc., and achieve low ohmic loss and mechanical strength High, fast and repeated start-up effect

Active Publication Date: 2016-12-28
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

However, the "low temperature" described in this invention is 700-800°C. Since doped zirconia is used as the electrolyte film and porous stainless steel is used as the support, the conductivity of the doped zirconia film and the oxide film on the surface of stainless steel in the low temperature region below 600°C Low, the ohmic impedance of the battery is too large, which cannot meet the working requirements of low-temperature SOFC

Method used

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  • A low-temperature solid oxide fuel cell supported by porous metal and its preparation method
  • A low-temperature solid oxide fuel cell supported by porous metal and its preparation method
  • A low-temperature solid oxide fuel cell supported by porous metal and its preparation method

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Embodiment 1

[0031] Such as figure 1 As shown, the low-temperature solid oxide fuel cell includes a porous metal support 1, an anode reaction layer 2, an electrolyte membrane 3, a cathode reaction layer 4, and a cathode current collecting layer 5.

[0032] In this embodiment, the plate-shaped porous metal support 1 uses foamed metal Ni, and its porosity is 50%. The anode reaction layer 2 uses a Ni-GDC (Gd doped cerium oxide) anode with a thickness of 20 μm. The electrolyte film 3 is also GDC with a thickness of 15 μm and is prepared by electrochemical vapor deposition. Cathode functional layer 4 is (La,Sr)(Co,Fe)O 3 The composite cathode composed of GDC and GDC has a thickness of 20μm.

[0033] Such as figure 2 As shown, the preparation method of the low-temperature solid oxide fuel cell is as follows:

[0034] (1) Prepare a flat metal support 1 made of foamed metal Ni;

[0035] (2) The anode material mixed with NiO and GDC is coated on the porous metal support 1, and the Ni-SDC anode reaction ...

Embodiment 2

[0040] The difference from Example 1 is that the metal support 1 is changed to a foamed Ni-Fe alloy, the porosity is 30%, the anode reaction layer 2 is NiCo-GDC, the thickness is 50 μm, and the reduction temperature is 400°C. The electrolyte film is changed to SDC (Sm doped cerium oxide), which is prepared by magnetron sputtering, with a thickness of 0.5 μm.

[0041] The maximum power density of the obtained single cell reaches 0.37 and 0.24W / cm at 600℃ and 500℃, respectively 2 , The corresponding current density is 0.92 / cm 2 And 0.75A / cm 2 .

Embodiment 3

[0043] The difference from Example 1 is that the metal support 1 is changed to a foamed Ni-Cr alloy with a porosity of 80%, and the anode reaction layer 2 is Ni / Pt (bimetal)-SDC (the Pt metal uses chloroplatinic acid It is the precursor), the thickness is 5μm. The electrolyte membrane is changed to Mg and Y co-doped cerium oxide, the thickness of the electrolyte membrane is 5μm, and the cathode functional layer is changed to (Sm,Sr)(Co)O 3 The composite cathode composed of SDC and SDC has a thickness of 50μm.

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Abstract

The invention discloses a solid oxide fuel cell capable of working at the low temperature of 300-600 DEG C and a preparation method thereof. The low temperature solid oxide fuel cell is composed of a porous metal support body, a positive pole functional layer, a dense electrolyte film, a negative pole functional layer and a negative pole current collecting layer. The porous metal support body material is Ni or Ni alloy, and the porosity is 30%-80%. The electrolyte film material is cerium oxide containing one or more positive bivalent or positive trivalent metal doping ions, the dense electrolyte film is prepared a physical or chemical vapor deposition method, and damage to the metal support body during high temperature sintering process can be avoided. The low temperature solid oxide fuel cell has the advantages of small ohmic loss, high mechanical strength, earthquake and thermal shock resistance and the like, is suitable for a portable power generation system and an on-board power generation system, and can realize the solid oxide fuel cell fast repeated start.

Description

Technical field [0001] The invention relates to a low-temperature solid oxide fuel cell, in particular to a low-temperature solid oxide fuel cell supported by porous metal and a preparation method thereof. Background technique [0002] Solid oxide fuel cell (SOFC) has the advantages of high power generation efficiency, low emissions, wide adaptation to a variety of fuel gases, and high waste heat utilization value. It is important for providing clean and efficient energy, alleviating energy and environmental crises, and achieving sustainable development in my country. One of the strategic technologies. According to the operating temperature, solid oxide fuel cells (SOFC) can usually be divided into three types: high temperature SOFC (800~1000℃), medium temperature SOFC (600~800℃) and low temperature SOFC (below 600℃). High-temperature SOFC has a long research history, mature preparation technology, and stable performance of key materials. However, high-temperature work has more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1016H01M8/0232
CPCH01M4/8647H01M8/0271H01M8/1016Y02E60/50
Inventor 区定容程谟杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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