Preparation method of cobalt manganese oxide coating layer precursor

A manganese-cobalt oxide coating and precursor technology, applied in chemical instruments and methods, inorganic chemistry, cobalt compounds, etc., can solve the problems of high cost, long reaction time, complex coating precursor process, etc., and achieve extended service life , small size, strong corrosion resistance

Inactive Publication Date: 2016-01-13
KUNMING UNIV OF SCI & 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: (Mn, Co) prepared by methods such as electroplating, electrodepos

Method used

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  • Preparation method of cobalt manganese oxide coating layer precursor
  • Preparation method of cobalt manganese oxide coating layer precursor
  • Preparation method of cobalt manganese oxide coating layer precursor

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0017] Example 1

[0018] The sol-gel method for preparing a manganese cobalt oxide coating precursor described in this embodiment specifically includes the following steps:

[0019] (1) Add cobalt nitrate and manganese nitrate to distilled water at a constant temperature of 70°C and stir to obtain mixed solution A; the addition amount of cobalt nitrate in solution A is 2.9105g / ml, and the addition amount of manganese nitrate is 1.2501g / ml;

[0020] (2) Add the sting mixture citric acid (C 6 H 8 O 7 ·H 2 O) Obtain solution B;

[0021] (3) Slowly add ammonia water (NH 3 ·H 2 O) Until flocculent sol-gel is produced;

[0022] (4) The flocculent sol-gel is sintered to obtain the manganese cobalt oxide coating precursor.

[0023] The sintering conditions in step (4) of the present invention are as follows: at a heating rate of 1°C / min, the temperature is increased to 85°C and the temperature is kept for 480 minutes; then the temperature is increased to 300°C and the temperature is kept for 30...

Example Embodiment

[0025] Example 2

[0026] The sol-gel method for preparing a manganese cobalt oxide coating precursor described in this embodiment specifically includes the following steps:

[0027] (1) Add cobalt nitrate and manganese nitrate to distilled water at a constant temperature of 80°C and stir to obtain mixed solution A; the addition amount of cobalt nitrate in solution A is 0.1039g / ml, and the addition amount of manganese nitrate is 1.2501g / ml;

[0028] (2) Add the stinging agent polyvinyl alcohol, ethylene glycol and adipic acid to solution A at 0.2980g / ml, 0.1035g / ml and 0.2436g / ml respectively to obtain solution B;

[0029] (3) Slowly add ammonia water (NH 3 ·H 2 O) Until flocculent sol-gel is produced;

[0030] (4) The flocculent sol-gel is sintered to obtain the manganese cobalt oxide coating precursor.

[0031] The sintering conditions in step (4) of the present invention are as follows: according to a heating rate of 1°C / min, the temperature is increased to 200°C and the temperature i...

Example Embodiment

[0032] Example 3

[0033] The sol-gel method for preparing a manganese cobalt oxide coating precursor described in this embodiment specifically includes the following steps:

[0034] (1) Add cobalt nitrate and manganese nitrate to distilled water at a constant temperature of 90°C and stir to obtain mixed solution A; the addition amount of cobalt nitrate in solution A is 9.4591g / ml, and the addition amount of manganese nitrate is 1.2501g / ml;

[0035] (2) Add the sting mixture polyvinyl alcohol and ethylene glycol to solution A at 0.4470g / ml and 0.4552g / ml respectively to obtain solution B;

[0036] (3) Slowly add ammonia water (NH 3 ·H 2 O) Until flocculent sol-gel is produced;

[0037] (4) The flocculent sol-gel is sintered to obtain the manganese cobalt oxide coating precursor.

[0038] The sintering conditions in step (4) of the present invention are as follows: according to a heating rate of 1°C / min, the temperature is increased to 300°C and the temperature is kept for 60 minutes; the...

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Abstract

The invention discloses a preparation method of a cobalt manganese oxide coating layer precursor, and belongs to the technical field of solid oxide fuel cell connector surface modification technologies. The preparation method overcomes the disadvantages of complex process, high cost and long reaction time of (Mn, Co)3O4 coating layer precursors prepared through electroplating, electrodeposition and physical vapor deposition methods. The (Mn, Co)3O4 coating layer precursor with easily controlled stoichiometry, small particle dimension, uniform granularity and large specific surface area, provided by the invention, is prepared through a sol-gel technology with manganese nitrate, cobalt nitrate, citric acid, polyvinyl alcohol, glycol, adipic acid and ammonia water as reagents. The method allows all reactions to be completed at room temperature, can accurately control the proportions of a coating layer, and realizes small dimensions, uniform granularity, large specific surface area, compactness and reliability of sintered coating layer particles.

Description

technical field [0001] The invention relates to a preparation method of a manganese oxide cobalt coating precursor, which belongs to the technical field of surface modification of solid oxides. Background technique [0002] Solid Oxide Fuel Cell (SOFC for short) is a power generation device that converts chemical energy into electrical energy. It has the advantages of high efficiency, cleanliness, and environmental friendliness, and is widely used in military, aerospace, transportation and other fields. The SOFC connector connects the anode and cathode of adjacent cells, isolates oxidizing gas and fuel gas, and has the characteristics of collecting current, high temperature resistance, and corrosion resistance, and is one of the key components restricting the development of SOFC. [0003] So far, applying a coating on the connector to improve its surface properties has been a hot and difficult issue that most researchers have paid attention to. Among the many coating mater...

Claims

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Application Information

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IPC IPC(8): C01G51/00H01M8/02H01M8/10H01M8/0297
CPCY02E60/50
Inventor 于晓华荣菊詹肇麟唐垚王远刘忠
Owner KUNMING UNIV OF SCI & TECH
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