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Preparation method of three-dimensional carbon fiber-based composite material with multi-layer coating structure for seawater dissolved oxygen battery

A technology of three-dimensional carbon fiber and composite materials, which is applied in the field of preparation of three-dimensional carbon fiber-based multi-layer cladding structure composite materials for seawater dissolved oxygen batteries, can solve the problems of low oxygen reduction efficiency and poor long-term operation stability, and achieve high electrocatalytic oxygen reduction Activity, beneficial to structural stability, and simple operation

Pending Publication Date: 2021-11-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical task of the present invention is to solve the problems of low oxygen reduction efficiency and poor long-term operation stability of the cathode material of the existing seawater dissolved oxygen battery. The composite electrode material with clad structure can effectively improve the discharge efficiency of seawater dissolved oxygen battery and prolong the battery discharge time

Method used

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  • Preparation method of three-dimensional carbon fiber-based composite material with multi-layer coating structure for seawater dissolved oxygen battery
  • Preparation method of three-dimensional carbon fiber-based composite material with multi-layer coating structure for seawater dissolved oxygen battery
  • Preparation method of three-dimensional carbon fiber-based composite material with multi-layer coating structure for seawater dissolved oxygen battery

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Embodiment 1

[0049] A method for preparing a three-dimensional carbon fiber-based multi-layer cladding structure composite material for a seawater dissolved oxygen battery of the present invention, the preparation process includes the following steps:

[0050] 1) Place the processed carbon fiber matrix with a three-dimensional spiral structure in a high-temperature environment for heat treatment to remove surface organic impurities; the carbon fiber specification is 12k, the cutting length is 3cm, the high-temperature heat treatment is at 500°C, and the high-temperature heat treatment time is 1h;

[0051] 2) The carbon fiber matrix with a three-dimensional helical structure in step 1) was ultrasonically cleaned and etched with a 2mol / L hydrochloric acid solution, and the ultrasonic etching time was 10 min to further remove surface inert substances;

[0052] 3) The carbon fiber matrix in step 2) is cleaned repeatedly with absolute ethanol, acetone, and ultrapure water to remove floating ash ...

Embodiment 2

[0063] A method for preparing a three-dimensional carbon fiber-based multi-layer cladding structure composite material for a seawater dissolved oxygen battery of the present invention, the preparation process includes the following steps:

[0064] 1) Place the processed carbon fiber matrix with a three-dimensional spiral structure in a high-temperature environment for heat treatment to remove surface organic impurities; the carbon fiber specification is 24k, the cutting length is 10cm, the high-temperature heat treatment is at 700°C, and the high-temperature heat treatment time is 3h;

[0065] 2) The carbon fiber matrix with a three-dimensional helical structure in step 1) was ultrasonically cleaned and etched with a 10 mol / L hydrochloric acid solution, and the ultrasonic etching time was 60 min to further remove surface inert substances;

[0066] 3) The carbon fiber matrix in step 2) is cleaned repeatedly with absolute ethanol, acetone, and ultrapure water to remove floating a...

Embodiment 3

[0077] A method for preparing a three-dimensional carbon fiber-based multi-layer cladding structure composite material for a seawater dissolved oxygen battery of the present invention, the preparation process includes the following steps:

[0078] 1) Place the processed carbon fiber matrix with a three-dimensional spiral structure in a high-temperature environment for heat treatment to remove surface organic impurities; the carbon fiber specification is 18k, the cutting length is 7cm, the high-temperature heat treatment is at 600°C, and the high-temperature heat treatment time is between 2 hours;

[0079] 2) The carbon fiber matrix with a three-dimensional helical structure in step 1) was ultrasonically cleaned and etched with a 6 mol / L hydrochloric acid solution, and the ultrasonic etching time was 30 min to further remove surface inert substances;

[0080] 3) The carbon fiber matrix in step 2) is cleaned repeatedly with absolute ethanol, acetone, and ultrapure water to remove...

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Abstract

The invention provides a preparation method of a three-dimensional carbon fiber-based composite material with a multi-layer coating structure for a seawater dissolved oxygen battery, which relates to a pretreatment method of a three-dimensional flexible carbon fiber brush, an electro-catalytic oxygen reduction composite material with a Fe@C-N coating structure, a preparation method thereof and the like. During preparation, high-temperature heat treatment and pickling pretreatment of the matrix are firstly carried out to remove impurities on the surface of the carbon fiber matrix and improve the stability of the material; then a convenient chemical deposition method is adopted to obtain a composite material with a multi-layer coating structure; and finally, high-temperature vacuum carbonization treatment is conducted to obtain the composite electrocatalytic electrode material with high stability and high catalytic activity. The three-dimensional flexible composite electrode material has the advantages of low price, convenient preparation method, large specific surface area, high oxygen reduction catalytic activity, good stability and the like, can improve the energy output of the seawater dissolved oxygen battery, improves the long-term stability of the seawater dissolved oxygen battery, and a foundation is laid for research and practical application of fuel cells such as seawater semi-fuel cells, metal-air cells and the like.

Description

technical field [0001] The invention relates to a composite material for a seawater dissolved oxygen battery and a preparation method thereof, belonging to the field of chemical energy applications, specifically a composite electrode material with a Fe@C-N coating structure of a three-dimensional flexible carbon fiber matrix, and an alloy material with high activity and high negative potential After being built into a seawater semi-fuel cell, it can provide continuous and stable power supply for various low-power marine monitoring and detection equipment such as marine rescue signal lights, sonobuoys, underwater unmanned vehicles, and submarine seismic observers in the marine environment. Background technique [0002] At present, there are many types of mature chemical sources used in marine equipment, such as lead-acid batteries, cadmium-nickel batteries, proton exchange membrane batteries, lithium-ion batteries, etc., but there are some problems when used for underwater pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06D06M11/49D06M15/37D06M101/40
CPCH01M4/88H01M4/9041H01M4/9083H01M12/06D06M11/49D06M15/37D06M2101/40
Inventor 段体岗余聚鑫马力辛永磊彭文山张海兵
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP