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Iron-cobalt-carbon composite oxide, preparation method thereof and metal air battery

A carbon composite and oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of high price, and achieve the effect of low price, favorable for popular use and excellent catalytic performance

Inactive Publication Date: 2017-08-25
深圳市航盛新材料技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an iron-cobalt-carbon composite oxide and its preparation method, aiming to solve the technical problem that the catalyst in the existing metal-air battery is mainly noble metal and the price is high

Method used

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  • Iron-cobalt-carbon composite oxide, preparation method thereof and metal air battery

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preparation example Construction

[0024] refer to figure 1 , the embodiment of the present invention proposes a preparation method of iron-cobalt-carbon composite oxide, comprising:

[0025] S1: At the first temperature, pump a pre-prepared precipitant with a specified concentration into the specified mixed solution in a stirring state at a specified feed rate, and react for the first length of time to obtain a suspension; wherein the specified mixed solution is conductive A mixture formed by dispersing carbon materials, iron salts and cobalt salts in a specified solvent according to the specified mass ratio;

[0026] S2: filtering the suspension to obtain a precipitate, and washing the precipitate;

[0027] S3: drying the washed precipitate for a second length of time at a second temperature in a first atmosphere to obtain a precursor;

[0028] S4: heat-treating the precursor at a third temperature for a third time length in a second atmosphere to obtain an iron-cobalt-carbon composite oxide.

[0029] In t...

Embodiment 1

[0042] Disperse conductive carbon black, ferric chloride and cobalt chloride in deionized water according to the ratio of Fe:Co:C substance ratio of 1:1:1, and mix evenly; A good 0.1% sodium hydroxide aqueous solution; after stirring and reacting at 80°C for 2 hours, filter the precipitate obtained from the reaction; after washing the above precipitate, place it in a vacuum oven and dry it under vacuum at 100°C for 12 hours to obtain a precursor; The body was heat-treated at 750°C for 24 hours in a high-purity nitrogen atmosphere, and after cooling in the furnace, an iron-cobalt-carbon composite oxide A with a molar ratio of Fe:Co:C of 1:1:1 was obtained.

Embodiment 2

[0044] Disperse carbon nanotubes, iron nitrate and cobalt nitrate in deionized water according to the ratio of Fe:Co:C substance ratio of 5:9:2, and mix evenly; 16% potassium hydroxide aqueous solution; after stirring and reacting at 65°C for 8 hours, filter the precipitate obtained from the reaction; after washing the above precipitate, place it in a vacuum oven and dry it in a vacuum at 120°C for 8 hours to obtain a precursor; put the above precursor in Under a high-purity argon atmosphere, heat treatment at 800°C for 10 hours, and after cooling in the furnace, an iron-cobalt-carbon composite oxide B with a molar ratio of Fe:Co:C of 5:9:2 was obtained.

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Abstract

The invention discloses a preparation method of an iron-cobalt-carbon composite oxide. The preparation method comprises the following steps: at a first temperature, pumping a premixed specified concentration precipitator into specified mixed liquor in a stirring state at a specified feeding rate, and reacting for a first time period, so that turbid liquid is obtained, wherein the specified mixed liquor is a mixture formed by dispersing a heat-conducting carbon material, iron salt and cobalt salt into a specified solvent in a specified ratio by amount of substance; filtering the turbid liquid to obtain precipitates, and washing the precipitates; drying the washed precipitates for a second time period at a second temperature in a first atmosphere, so that a precursor is obtained; and carrying out heat treatment on the precursor for a third time period at a third temperature in a second atmosphere, so that the iron-cobalt-carbon composite oxide is obtained. The iron-cobalt-carbon composite oxide air electrode catalyst is cheap but has superior performance when being used as a metal air battery catalyst, and popularization and application of the metal air battery are facilitated.

Description

technical field [0001] The invention relates to the field of new energy, in particular to an iron-cobalt-carbon composite oxide, a preparation method thereof, and a metal-air battery. Background technique [0002] Energy issues have attracted more and more attention. Under the prospect of gradually scarcity of natural resources, new energy has been developed rapidly, and development technologies such as wind energy, solar energy, and tidal energy are changing with each passing day. With the development of new energy, the technological innovation of various types of secondary batteries has also accelerated the development process, and lithium-ion batteries, nickel-metal hydride batteries, fuel cells, etc. have been widely used. [0003] At present, the technical research of metal-air batteries has also become a hot research point in the field of new energy. A metal-air battery consists of a positive air electrode, a negative metal, and an electrolyte. Among them, the air el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8842H01M4/9016Y02E60/50
Inventor 张启辉
Owner 深圳市航盛新材料技术有限公司
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