Anode material containing alkali metal or alkaline-earth metal element of solid oxide fuel cell and preparation method and application thereof

A solid oxide, anode material technology, used in battery electrodes, circuits, electrical components, etc.

Active Publication Date: 2014-10-01
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the long-term stability of SOECs is still a problem, and several mechanisms of degradation and failure have been proposed, including the segregation of silicon oxide impurities at the Ni-YSZ interface, and the migration of Ni in the Ni-YSZ electrode when exposed to high water vapor conditions. , anode layering, etc., so it is still necessary to find efficient and stable anode materials

Method used

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  • Anode material containing alkali metal or alkaline-earth metal element of solid oxide fuel cell and preparation method and application thereof
  • Anode material containing alkali metal or alkaline-earth metal element of solid oxide fuel cell and preparation method and application thereof
  • Anode material containing alkali metal or alkaline-earth metal element of solid oxide fuel cell and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] This example is used to illustrate the double perovskite oxide Sr 2 CoO 6-δ Loaded with 3wt% K 2 CO 3 Anode materials and their preparation methods.

[0121] First, the double perovskite oxide Sr 2 CoO 6-δ , including the following steps:

[0122] (1) The stoichiometric ratio of high-purity strontium carbonate (chemical formula is SrCO 3 ), cobalt carbonate (chemical formula CoCO 3 ) and ammonium molybdate (chemical formula (NH 4 ) 6 Mo 7 o 24 4H 2 O) After mixing, fully grind in an acetone medium until the acetone is completely volatilized to obtain a ground powder.

[0123] (2) Press the ground powder obtained in step (1) into tablets, and bake it in the air at 900°C for 10 hours, cool it and grind it again, and bake it in the air at 1300°C for 10 hours, repeat the grinding and The operation of roasting at 1300°C until the pure phase is obtained, the double perovskite oxide Sr 2 CoO 6-δ (referred to as SCMO).

[0124] Then, the prepared double perovski...

Embodiment 2

[0129] This example is used to illustrate the double perovskite oxide Sr 2 CoO 6-δ An anode material loaded with 5wt% BaO and its preparation method.

[0130] double perovskite oxide Sr 2 CoO 6-δ The preparation method is the same as in Example 1.

[0131] In this example, the alkaline earth metal oxide BaO is loaded on the double perovskite oxide Sr by thermal evaporation method. 2 CoO 6-δ , including the following steps:

[0132] (1) The double perovskite oxide Sr 2 CoO 6-δ Powder and rice starch were mixed in a weight ratio of 8:2, terpineol containing 4wt% ethyl cellulose was added, and ethanol was added as a dispersion medium, and ball milled for 24 hours to obtain a uniform slurry, and then the slurry was printed by screen printing Coated in 250 µm thick La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 2.85 On the electrolyte sheet, baked at 950°C for 2 hours, the porous double perovskite oxide Sr 2 CoO 6-δ Material.

[0133] (2) Spread about 40 mg of BaO powder on the alum...

Embodiment 3

[0135] This example is used to illustrate the combination of NiO and proton conductor oxide BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 o 3-δ The mixture is loaded with 8wt% K 2 CO 3 Anode materials and their preparation methods.

[0136] First, the proton conductor oxide BaZr was prepared by a solid-state reaction method 0.1 Ce 0.7 Y 0.1 Yb 0.1 o 3-δ , including the following steps:

[0137] (1) The stoichiometric ratio of high-purity barium carbonate (chemical formula is BaCO 3 ), zirconia (chemical formula ZrO 2 ), cerium oxide (chemical formula CeO 2 ), yttrium oxide (chemical formula Y 2 o 3 ), and ytterbium oxide (chemical formula Yb 2 o 3 ) mixed, ball milled in ethanol medium for 48 hours, dried in an oven at 80°C, and then placed in a muffle furnace for 10 hours at 1100°C.

[0138] (2) Ball mill the powder calcined in step (1) again, and calcinate at 1100°C for 10 hours to obtain the proton conductor oxide BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 o 3-δ (referred to as BZC...

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Abstract

The invention provides an anode material containing an alkali metal or alkaline-earth metal element of a solid oxide fuel cell and a preparation method and application thereof. The alkali metal element can be introduced into the anode material by a doping method, or alkali metal or alkaline-earth metal carbonate, acetate, oxide or mixture thereof also can be introduced into the anode material by a loading method. The anode material has the characteristics of improving catalytic activity and long-term stability. The invention also relates to application of the anode material in a solid oxide electrolytic tank.

Description

technical field [0001] The invention relates to an anode material of a solid oxide fuel cell containing alkali metal or alkaline earth metal elements, a preparation method and application thereof. Background technique [0002] Currently, the increasing demand for energy stimulates the research and development of alternative energy conversion and storage systems that are efficient, low-cost, and environmentally friendly. [0003] Solid oxide fuel cells (SOFCs for short) are a class of electrochemical reactors that can directly convert the chemical energy of fuel gases into electrical energy in an efficient and environmentally friendly manner. Solid Oxide Fuel Cells Compared with other fuel cells currently studied, SOFCs based on electrolyte materials of oxygen-ion-conducting oxides or high-temperature proton-conducting oxides have the advantages of using economically reasonable material components, low sensitivity to impurities in the fuel, and High energy conversion efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88
CPCY02E60/50H01M4/8605H01M4/8817H01M4/8825H01M4/905H01M4/9075
Inventor 李帅孙春文马朝晖杨伟陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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