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Method for preparing stephanoporate anode support body using paper fabric a pore-forming agent

A Porous Anode, Paper Fiber Technology

Inactive Publication Date: 2010-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problems of using the existing pore-forming agent to form a connected gas transport channel in the anode support, reducing the strength of the anode support and reducing the three-phase reaction interface; Method for preparing porous anode support body with fiber as pore-forming agent

Method used

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  • Method for preparing stephanoporate anode support body using paper fabric a pore-forming agent
  • Method for preparing stephanoporate anode support body using paper fabric a pore-forming agent
  • Method for preparing stephanoporate anode support body using paper fabric a pore-forming agent

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specific Embodiment approach 1

[0011] Embodiment 1: In this embodiment, the method for preparing a porous anode support with paper fiber as a pore-forming agent is carried out in the following steps: 1. The mass ratio of nickelous oxide and solid oxide electrolyte is 0.25~9:1 Grinding after mixing to obtain an initial powder with a fineness particle size of 0.1 microns to 10 microns; 2. Weigh paper scraps with a mass ratio of 0.05 to 0.5:1 to the initial powder, and then add them to a solvent and soak for 0.1 to 24 hours. The mass of the solvent is 2 to 100 times that of the paper scraps, and then magnetically stirred at 30 to 90°C for 0.1 to 24 hours to obtain a paper fiber suspension; 3. Dry the paper fiber suspension at 25 to 250°C, and then Grinding to obtain short paper fibers, mixing the short paper fibers with the initial powder to obtain the final anode powder; 4. Put the final anode powder in step 3 in a steel mold, and press it at room temperature with a pressure of 10MPa to 2000MPa, Prepare an an...

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass ratio of NiO to solid oxide electrolyte in Step 1 is 0.5-8:1. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass ratio of NiO to solid oxide electrolyte in Step 1 is 1-5:1. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for preparing a porous anode support body by taking paper fiber as a pore-forming agent, which relates to the preparation method of porous anode support bodies. The method solves the problem that the strength of the anode support body as well as a three-phase reaction interface is reduced by utilizing the current pore-forming agent to form a communicated gas transmission channel in the anode support body. The method is as follows: 1. primary powder is prepared; 2. a paper fiber suspension is prepared; 3. paper short fibers are prepared and mixed with the primary powder evenly; 4. an anode blank is prepared; and 5. sintering is conducted and the porous anode support body is obtained. The method applies a small amount of pore-forming agent to form thin-lineshaped pores in the anode and the pores are communicated; the pore structure is reasonable, which causes the reaction gas and product gas to flow quickly in the anode so as to guarantee the smooth chemical reaction in the anode and ensure sufficient mechanical strength of the anode, and also increases the three-phase reaction interface and improves the battery output performance.

Description

technical field [0001] The invention relates to a preparation method of a porous anode support body; in particular, it relates to a preparation method of a porous anode support body used in an anode support type electrolyte film battery. Background technique [0002] Solid oxide fuel cell (SOFC) is a ceramic electrochemical device that directly converts the chemical energy of fuel and oxygen into electrical energy without intermediate steps such as combustion, so the battery has the advantages of high energy conversion rate and environmental protection. SOFC consists of three parts: electrolyte, anode and cathode. The anode of SOFC is required to be stable in a reducing atmosphere and to allow the gas to flow through the electrode, which requires us to add a pore-forming agent to the anode material to increase the porosity of the anode. [0003] The current research hotspot is the anode-supported electrolyte film battery. The pore forming agent is added in the process of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 潘伟平吕喆陈孔发魏波黄喜强王志红苏文辉
Owner HARBIN INST OF TECH