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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

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: (Mn, Co) prepared by methods such as electroplating, electrodeposition, physical vapor deposition 3 o 4 Coating precursors have disadvantages such as complex process, high cost, and long reaction time

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

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Embodiment 1

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

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

[0020] (2) Add chelating agent 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) Sintering the flocculent sol-gel to obtain the precursor of manganese oxide cobalt coating.

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

Embodiment 2

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

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

[0028] (2) According to the addition amount of 0.2980g / ml, 0.1035g / ml and 0.2436g / ml, add chelating agents polyvinyl alcohol, ethylene glycol and adipic acid to solution A to obtain solution B;

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

[0030] (4) Sintering the flocculent sol-gel to obtain the precursor of manganese oxide cobalt coating.

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

Embodiment 3

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

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

[0035] (2) According to the addition amount of 0.4470g / ml and 0.4552g / ml, add the chelating agent polyvinyl alcohol and ethylene glycol into solution A to obtain solution B;

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

[0037] (4) Sintering the flocculent sol-gel to obtain the precursor of manganese oxide cobalt coating.

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

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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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