Ni-based anode material resistant to carbon deposition, preparation method and use

An anode material, anti-carbon technology, applied in the direction of fuel cells, battery electrodes, structural parts, etc., can solve the problem that the catalytic activity cannot be compared with Ni-based anodes, so as to improve the anti-carbon performance and long-term stability, reduce Small exposed area, inhibits the effect of growing over time

Active Publication Date: 2019-03-08
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

[0004] Although scientists all over the world have been looking for anode materials to replace Ni-based cermets for more than ten years, so far, the catalytic activity of all these materials cannot be compared with Ni-based anodes. SOFCs stacks produced by some foreign companies Still using Ni-based anode

Method used

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  • Ni-based anode material resistant to carbon deposition, preparation method and use
  • Ni-based anode material resistant to carbon deposition, preparation method and use
  • Ni-based anode material resistant to carbon deposition, preparation method and use

Examples

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Embodiment 1

[0088] This example is used to illustrate the 1mol% MgO doped NiO-30wt%Sm 0.2 Ce 0.8 o 1.9 Anode materials and methods for their preparation.

[0089] First, 1 mol% MgO-doped NiO powder was prepared by a glycine combustion method, which included the following steps:

[0090] (1) take nickel nitrate and magnesium nitrate by stoichiometric ratio, and join in deionized water, form aqueous solution;

[0091] (2) in the aqueous solution that step (1) makes, add glycine as complexing agent, after glycine dissolves, continue to stir for about 2 hours to fully complex, wherein, the molar number of added glycine is 1 / 2 (NO 3- moles of -NH 4+ moles).

[0092] (3) The aqueous solution containing about 0.02mol of nickel nitrate obtained in step (2) is taken at a time, placed in a 1000-ml beaker, heated on a 500-watt electric heating plate, and slowly evaporated at 80°C After the solution becomes viscous (that is, a jelly is formed), continue heating at 300°C, the jelly burns and spr...

Embodiment 2

[0096] This example is used to illustrate the 2mol% MgO coated NiO-20wt% Sm 0.2 Ce 0.8 o 1.9 Anode materials and methods for their preparation.

[0097] First, adopt the sol-gel (sol-gel) method to coat nano-scale MgO on the particle surface of NiO powder, this method specifically comprises the following steps:

[0098](1) Calcining 3 grams of NiO powder prepared by glycine combustion method at 850° C. for 2 hours, then adding 8 milliliters of 0.1 mol / L magnesium methoxide in ethanol, and stirring for 5 hours;

[0099] (2) The product obtained in step (1) was dried at 120° C. and calcined at 500° C. for 1 h to obtain a NiO sample coated with 2 mol% MgO.

[0100] Using a scanning electron microscope to observe the size and morphology of the 2mol% MgO-doped NiO powder sample particles, the results are as follows image 3 shown.

[0101] Then, the prepared 2mol% MgO-coated NiO powder sample and Sm 0.2 Ce 0.8 o 1.9 The powder is mechanically ground and mixed uniformly at a...

Embodiment 3

[0103] This example is used to illustrate doping with 1mol% MoO 3 Doped NiO-20wt%Sm 0.2 Ce 0.8 o 1.9 Anode materials and methods for their preparation.

[0104] First, 1 mol% MoO was prepared by the glycine combustion method 3 The NiO powder of doping, the NiO powder that this method prepares 1mol% MgO doping in the embodiment 1 is basically the same, difference is: what used in step (1) is the nickel nitrate and molybdic acid that take by stoichiometric ratio Ammonium ((NH) 4 Mo 7 o 24 .4H 2 O).

[0105] Observation of 1 mol% MoO by scanning electron microscopy 3 The size and morphology of the doped NiO powder sample particles, the results are as follows Figure 4 shown.

[0106] Then the 1mol% MoO synthesized by glycine combustion method 3 Doped NiO powder and Sm 0.2 Ce 0.8 o 1.9 The powder is mechanically ground and mixed uniformly according to the mass ratio of 80:20, and the target product is obtained, and the number is No.3.

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Abstract

The invention provides an anti-carbon-deposition Ni-based anode material which is used for a solid oxide fuel cell. The Ni-based anode material contains oxide MOx-modified NiO, wherein M is selected from Mg, Al, Sn, Mo and W, and x represents a mole fraction and is larger than or equal to 1 and smaller than or equal to 3; the oxide MOx accounts for 0.001%-20% of the total molar weight of MOx and NiO, and NiO is modified with the oxide MOx through doping and / or coating. The invention further relates to an application of the Ni-based anode material in the solid oxide fuel cell. Besides, the invention further provides a method for inhibiting carbon deposition by adding a few alkaline substances to the carbon-based fuel.

Description

technical field [0001] The invention relates to a carbon-deposition-resistant Ni-based anode material, a preparation method and use, in particular to a carbon-deposition-resistant Ni-based anode material for solid oxide fuel cells, a preparation method and use. Background technique [0002] 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. Compared with other fuel cells currently studied, solid oxide fuel cells have the advantages of using economically reasonable material components, low sensitivity to impurities in the fuel, and high energy conversion efficiency [References 1 and 2]. But at present, SOFCs cannot compete with traditional internal combustion engines in terms of cost and durability. In the past 10 years, research has mainly focused on the development of medium and low temperature solid oxide fue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M8/1233
CPCH01M4/9033H01M8/1233Y02E60/50
Inventor 孙春文杨伟陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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