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Asymmetric composite anode of microtuble-type solid oxide fuel cell and preparation method of asymmetric composite anode

A solid oxide and fuel cell technology, applied to fuel cell parts, battery electrodes, circuits, etc., can solve problems such as easy delamination, long process route, and weak interlayer bonding, and achieve anti-carbon deposition And the effect of good sulfur resistance, small gas diffusion resistance and simple process

Active Publication Date: 2015-01-07
TIANJIN POLYTECHNIC UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people mainly use the layer-by-layer preparation method to obtain multi-layer composite anodes composed of different anode compositions. The main disadvantages of the asymmetric anode prepared by this method are: (1) The process route for layer-by-layer preparation is long and consumes energy. Time-consuming; (2) The bonding force between layers of different compositions is not strong, and delamination is easy to occur during battery operation; (3) It is impossible to obtain an asymmetric structure with step porosity; (4) It is difficult to apply to the preparation of microtubular SOFC

Method used

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  • Asymmetric composite anode of microtuble-type solid oxide fuel cell and preparation method of asymmetric composite anode
  • Asymmetric composite anode of microtuble-type solid oxide fuel cell and preparation method of asymmetric composite anode
  • Asymmetric composite anode of microtuble-type solid oxide fuel cell and preparation method of asymmetric composite anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of Cu-CeO 2 -YSZ / Ni-YSZ asymmetric composite anode microtubes

[0032] The steps are as follows: preparation of ceramic-polymer slurry; preparation of electrolyte / Ni-based anode bilayer asymmetric microtubes with hierarchical porous structure; Cu-CeO 2 Based anode catalyst deposition and reduction, in which:

[0033] (1) Preparation of ceramic-polymer slurry

[0034] The organic polymer in this example is polyethersulfone (PESf); the solvent is N-methylpyrrolidone (NMP); the additive is polyvinylpyrrolidone (PVP); the ceramic electrolyte is 0.05-2 μm 8% yttrium-stabilized zirconia ( YSZ for short, commercially available, produced by Yixing Zhongtai Ceramic New Material Co., Ltd.); NiO powder is commercially available, with a particle size of 0.1-2 μm; the weight percentage composition of each component when preparing the polymer slurry is: A The slurry is, YSZ: PESf: NMP: PVP = 57%: 3%: 30%: 10%; the B slurry is, YSZ: NiO: PESf: NMP: PVP =...

Embodiment 2

[0040] Example 2 Preparation of Cu-CeO 2 -SDC / Ni-SDC asymmetric composite anode microtubes

[0041] Concrete steps are with embodiment 1. The materials and operating parameters used in this example are as follows:

[0042] (1) The organic polymer is polysulfone (PSf); the solvent is dimethyl sulfoxide (DMSO); the additive is sodium polymethacrylate; the ceramic electrolyte is 0.4~2 μm samarium-doped cerium oxide (SDC); NiO powder It is a commercially available product with a particle size of 0.1-2 μm; when preparing polymer slurry, the weight ratio of each component is: A slurry is, SDC: PSf: DMO: sodium polymethacrylate = 66: 10: 23.5: 0.5; B slurry is, SDC:NiO:PSf:DMO:sodium polymethacrylate=32:40:5:22:1.

[0043] (2) During the spinning process, the internal coagulation liquid is a mixture of solvent DMSO and non-solvent ethanol water; the weight percentage of the solvent is 95%; the sintering temperature of the double-layer microtube is 1550 ° C, and the sintering...

Embodiment 3

[0046] Example 3 Preparation of Cu-CeO 2 -YSZ / Ni-GDC asymmetric composite anode microtubes

[0047] Concrete steps are with embodiment 1. The materials and operating parameters used in this example are as follows:

[0048] (1) The organic polymer is polyethersulfone (PESf); the solvent is N,N-dimethylacetamide (DMAc); the additives are glycerol and PVP; the ceramic electrolyte is commercially available 8% YSZ and particle size of 0.05~2 μm Gadolinium-doped cerium oxide (GDC) is 0.1~2μm; NiO powder is a commercially available product with a particle size of 0.1~2μm; when preparing polymer slurry, the weight ratio of each component is: A slurry is, YSZ : PESf: DMAc: glycerol = 70: 3: 25: 2; B slurry is, GDC: NiO: PESf: DMAc: PVP = 37: 38: 4: 20: 1.

[0049] (2) During the spinning process, the internal condensate is a mixture of solvent N,N-dimethylacetamide and non-solvent propanol; the weight percentage of the solvent is 95%; the sintering temperature of the double-la...

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Abstract

The invention belongs to the technical field of solid fuel batteries and particularly relates to an asymmetric composite anode of a microtuble-type solid oxide fuel cell and a preparation method of the asymmetric composite anode. The composite anode is provided with double anodes and is of a gradient hole structure; an anode microtuble inner layer is Cu-CeO2 based porous anode which plays a role in supporting and has the thickness of 0.2-0.6mm; and an anode microtube outer layer is a Ni-based porous anode which is of a micropore structure and has the thickness of 5-30 mu m. The composite anode is prepared by virtue of a phase inversion molding-sintering-soaking and reduction process; the prepared asymmetric composite anode has small gas diffusion resistance, has favorable anti-carbon and sulfur-tolerance performances, and is suitable for preparing a microtube-type solid oxide fuel cell which directly utilizes a hydrocarbon compound as a fuel; and the method has the advantages of being simple in technological process and easy to operate, having no need of expensive equipment, being low in cost and being suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of solid fuel cells, and in particular relates to an asymmetric composite anode of a microtube type solid oxide fuel cell and a preparation method thereof. Background technique [0002] Solid Oxide Fuel Cell (SOFC) has high energy conversion efficiency (cogeneration efficiency of heat and electricity can reach more than 70%), wide source of fuel (hydrogen, natural gas, methanol, gasoline and other hydrocarbons can be used as fuel) and environmental protection Friendly (CO 2 Emissions can be reduced by 50%) and other advantages, has become a new energy technology developed by various countries. Microtubular solid oxide fuel cell is a tubular fuel cell with a diameter of less than 2 mm, which has the advantages of ordinary tubular and plate SOFCs, that is, large electrode area per unit volume, high cell volume power density, and short start-up and stabilization times. , easy to seal and connect at high tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88
CPCY02E60/50Y02P70/50
Inventor 谭小耀赵自航刘旭陈宗蓬王晨张敏
Owner TIANJIN POLYTECHNIC UNIV
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