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Carbon deposition-resistant solid oxide fuel cell anode and preparation method thereof

A solid oxide, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of difficulty in practical use, low electrocatalytic activity, low electrical conductivity, etc., and achieve controllable microstructure and electrocatalytic activity. The effect of high and low gas concentration polarization

Active Publication Date: 2017-02-22
CHANGSHU INSTITUTE OF TECHNOLOGY
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Problems solved by technology

However, this requires the anode to have higher electrocatalytic activity, and at the same time have good anti-carbon performance, because the uneven decomposition of carbon monoxide at low temperature will also produce carbon deposition
Although copper-based anodes and cerium-based anodes have good anti-carbon deposition effects, they are difficult to be practical because of their low electrocatalytic activity or low electrical conductivity.

Method used

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  • Carbon deposition-resistant solid oxide fuel cell anode and preparation method thereof

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Effect test

Embodiment 1

[0045] Dissolve nickel nitrate in deionized water to form a 1.0M nitrate solution, and then add glycine to the nitrate solution, wherein the molar ratio of glycine to nitrate in the solution is 1:2. After stirring evenly at room temperature, heat it on an electric stove, concentrate until it spontaneously ignites to obtain a black powder. Then heat-treated at 700 °C for 4 h to obtain gray NiO powder. Dissolve cerium nitrate and samarium nitrate in deionized water to form a 1.0M nitrate solution, wherein the molar ratio of cerium ions to samarium ions is 8:2, and then add glycine to the nitrate solution, wherein glycine and solution The molar ratio of nitrate in is 1:2. After stirring evenly at room temperature, heat it on an electric furnace, concentrate until it spontaneously ignites to obtain a light yellow powder. Then heat treatment at 700 °C for 04 h to obtain light yellow SDC powder.

[0046] The prepared NiO powder and SDC powder were ball milled and mixed for 72 hou...

Embodiment 2

[0052] The anode of the single cell was prepared according to the method of Example 1, and the single cell containing the electrolyte layer and the cathode layer was prepared by the screen printing method.

[0053] The maximum output power of this single cell is 327mW / cm 2 , After 120h, the power attenuation was 2.1%, and the carbon relative deposition area on the skeleton surface was 3.9%.

Embodiment 3

[0055] Dissolve nickel nitrate and copper nitrate in deionized water to form a 2.0M nitrate solution, wherein the molar ratio of copper ions to nickel ions is 0.5:9.5, and then add glycine to the nitrate solution, wherein glycine and solution The molar ratio of nitrate in is 1:1. After stirring evenly at room temperature, heat it on an electric furnace, concentrate until it spontaneously ignites to obtain a gray powder. Then heat treatment at 700°C for 4h to obtain brown-yellow Ni 0.95 Cu 0.05 O powder. Ni will be produced 0.95 Cu 0.05 The O powder and the SDC powder obtained in Example 1 were mixed and dried by ball milling in the manner of Example 1. The mixed powder and polystyrene monodisperse microspheres with a particle size of 1.14 μm were mixed and dried according to the method of Example 1. Then, the double-layer ceramics were prepared according to the method of Example 1 and then subjected to immersion heat treatment, except that the temperature of the second h...

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Abstract

The invention discloses a carbon deposition-resistant solid oxide fuel cell anode and a preparation method thereof. Copper-nickel alloy nano-dots with electro-catalytic activity and good carbon deposition resistance are introduced on the basis of a nickel-copper alloy-cerium oxide-doped porous metal ceramic anode with a micron scale microstructure. The copper-nickel alloy nano-dots are introduced by adopting a metal ion-urea mixed solution soaking method and a second-order heat treatment method in a reducing atmosphere; active copper-nickel alloy nano-dots are selectively formed on the surfaces of copper-nickel alloy particles in micron scale channels of a porous metal ceramic skeleton. The micron / nano-composite structural anode disclosed by the invention is provided with appropriate fuel gas dispersing channels, richer three-phase boundaries, and nano-structure modified inner hole surfaces which are used for inhibiting the formation of carbon deposition, so that the carbon deposition-resistant solid oxide fuel cell anode has the advantages of high electro-catalytic activity on hydrocarbon gas, good carbon deposition resistance and the like, and is suitable for direct hydrocarbon fuel operation.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and relates to a direct hydrocarbon medium and low temperature solid oxide fuel cell technology, in particular to a micro / nano composite structured high electrocatalytic activity anti-carbon deposition solid oxide fuel cell anode and a preparation method thereof . Background technique [0002] A fuel cell is a device that directly converts chemical energy into electrical energy, and the reaction products are water and carbon dioxide, so it has the advantages of high energy conversion rate and low pollution. The solid oxide fuel cell is an all-solid-state structure that uses ceramic materials as components, so it can work at high temperatures (800-1000°C). The biggest advantage of high temperature work is that hydrocarbon gas can be directly used as fuel, so as to solve the problems of hydrogen production, storage and transportation. [0003] Anode carbon deposition is the biggest p...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8647H01M4/8875H01M4/9041H01M4/9075Y02E60/50
Inventor 王志成孙建国李逍遥袁瑜含钱斌张惠国冯金福
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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