Process for synthesizing biphase nanometer fuel battery cathode material

A fuel cell cathode and synthesis method technology, which is applied to fuel cell parts, battery electrodes, chemical instruments and methods, etc., can solve the problems of thermal expansion coefficients not close, chemical incompatibility, etc., achieve performance improvement, and simple synthesis method , the effect of improving performance

Inactive Publication Date: 2008-09-03
郭道传
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the electrolyte of the battery system is yttria-stabilized zirconia (YSZ), there are a series of problems such as thermal expansion coefficients between the cathode material and the electrolyte are not close to chemical incompatibility, etc.

Method used

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  • Process for synthesizing biphase nanometer fuel battery cathode material
  • Process for synthesizing biphase nanometer fuel battery cathode material
  • Process for synthesizing biphase nanometer fuel battery cathode material

Examples

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Embodiment 1

[0026] Combine lanthanum nitrate, strontium nitrate, iron nitrate, cobalt nitrate, etc. according to La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 The stoichiometric ratio is mixed into a solution, and the quantitative EDTA is dissolved into the ammonia aqueous solution according to the synthesis requirements to form a clear solution, and an appropriate amount of ethylene glycol is added. All the above solutions are mixed and heated and stirred at 70°C with a constant temperature magnetic stirrer. Keep the pH of the solution at 9 until a sol is formed. Dry the sol in a drying oven at 170°C for 8 hours to obtain a dry gel. Manually grind the gel to make the precursor particles have a certain surface size. In a resistance furnace at 900°C After heating for 2 hours to obtain the nanomaterials, such as image 3 XRD pattern shown.

Embodiment 2

[0028] Combine lanthanum nitrate, strontium nitrate, iron nitrate, cobalt nitrate, etc. according to La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 The stoichiometric solution is mixed with the solution with citric acid as the complexing agent. The amount ratio of citric acid to all metal ions is 1.1. Add appropriate amount of ethylene glycol and heat and stir at 80°C with a constant temperature magnetic stirrer. The pH of the solution is 9 until a sol is formed. The sol is dried in a drying oven at 170°C for 8 hours to obtain a dry gel. The dry gel is mechanically ball-milled to make the particles have a certain specific surface size and heated at 900°C in a resistance furnace 2 Hours to obtain the nanomaterial.

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Abstract

The invention relates to a synthetic method for a duplex nanometer fuel cell cathode material which has characteristics in including steps as follows: (1) confecting soluble salt solution according with required confecting rate for synthetic cathode material; (2) confecting complexing agent solution using edta, citric acid as main raw material; (3) mixing the solution obtained by the steps (1) and (2), adding suitable ethylene glycol, heating and beating in constant temperature, then obtaining sol; (4) drying obtained sol in drying box, and obtaining gel; (5) processing obtained gel, and changing particle specific surface size, then synthesis the duplex nanometer cell cathode material under given temperature. The method has advantages in that: synthetic method is simple, reaction temperature is lower than solid phase method, nanometer particle is mechanical mixed simply different from duplex, and has better uniformity on microcosmic interface, and is favorable for improving cathode material property.

Description

Technical field [0001] The invention relates to a method for synthesizing a cathode material for a battery, in particular to a method for synthesizing a cathode material for a two-phase nano fuel cell. Background technique [0002] With the deepening of energy shortages, especially in recent years, the rapid development of the electronics industry, medical industry, digital products, etc., solid oxide fuel cells (SOFC) rely on their clean and efficient power generation methods and high Its energy conversion rate and environmental friendliness (low emission of harmful gases such as sulfur dioxide and no noise pollution) are widely used in various fields. It is also recognized as a highly efficient green power generation device in the 21st century. [0003] Solid oxide fuel cells have many advantages and are widely used, but the high cost of making SOFC electrodes has gradually become a factor restricting its development. In order to reduce the cost of solid oxide fuel cells, the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/02C04B35/622C01F17/00C01G1/02
CPCY02E60/50
Inventor 郭道传谷亦杰
Owner 郭道传
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