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Magnesium dioxide/carbon black composite material and preparation method and application thereof

A composite material, manganese dioxide technology, applied in fuel cell type half cells and primary cell type half cells, electrical components, battery electrodes, etc., can solve the problems of complex devices, high energy consumption, and unsuitable for industrial production. , to achieve the effect of simple device, low energy consumption and stable synthesis steps

Active Publication Date: 2018-09-18
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen that the preparation of composite materials in the prior art requires high temperature, high pressure, complex equipment, high energy consumption, and is not suitable for industrial production.

Method used

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  • Magnesium dioxide/carbon black composite material and preparation method and application thereof
  • Magnesium dioxide/carbon black composite material and preparation method and application thereof
  • Magnesium dioxide/carbon black composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 5 g of acetylene carbon black into a glass bottle with 1000 mL of deionized water, stir to obtain a 5 mg / mL dispersed carbon black solution; slowly add 1000 mL of potassium permanganate solution with a concentration of 0.1 mol / L to the resulting dispersion, Stir for 10 minutes to obtain a homogeneous mixture; place the obtained mixed solution in a water bath at 85°C, heat it and ultrasonically (ultrasonic power: 800W) for 3 hours; repeatedly suction-filter and wash the obtained solution with deionized water for 3 to 5 times, and finally dry at 120°C The manganese dioxide / carbon black composite material was obtained in 8 hours.

Embodiment 2

[0039] Add 1 g of acetylene black into a flask filled with 200 mL of deionized water, and stir to obtain a 5 mg / mL dispersion; slowly add 200 mL of potassium permanganate solution with a concentration of 0.05 mol / L to the obtained dispersion, and stir for 10 minutes to obtain a uniform The mixture; the resulting mixed solution was placed in a water bath at 80° C., heated and ultrasonically (ultrasonic power: 300 W) for 5 hours; the resulting solution was repeatedly suction-filtered and washed 3 to 5 times with deionized water, and finally dried at 100° C. for 8 hours. A manganese dioxide / carbon black composite material is obtained.

Embodiment 3

[0041] Add 0.1g of Ketjen Black EC-300J conductive carbon black into a flask containing 200mL of deionized water, stir to obtain a 0.5mg / mL dispersion solution; slowly add 200mL of high concentration 0.01mol / L to the resulting dispersion Lithium manganate solution, stirred for 10 minutes to obtain a homogeneous mixture; placed the obtained mixed solution in a water bath at 90°C, heated and ultrasonicated (ultrasonic power: 2400W) for 30 minutes; repeatedly suction-filtered and washed the obtained solution with deionized water for 3 to 5 times, Finally, dry at 80° C. for 12 hours to obtain a manganese dioxide / carbon black composite material.

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Abstract

The invention belongs to the field of an inorganic functional material, and discloses a magnesium dioxide / carbon black composite material and preparation method and application thereof. The magnesiumdioxide / carbon black composite material is prepared by taking carbon black as a raw material, adding the carbon black into deionized water to prepare a carbon black solution, adding the carbon black solution into a permanganate solution to obtain a mixture, heating the mixture in water bath, performing ultrasound and performing filtering, washing and drying. The preparation method is simple in process and available in raw material, and industrial production is easy to implement. The composite material has good oxidization-reduction activity and stability under an alkali condition, is simple tooperate and easy to control, amplify and synthesize, is simple in equipment, short in consumed time and is environmental-friendly; and the composite material can be applied to a zinc-air battery andhas performance equivalent to that of a Pt / C catalyst in the zinc-air battery.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and more specifically relates to a manganese dioxide / carbon black composite material and its preparation method and application. Background technique [0002] Whether it is a fuel cell (such as a hydrogen-oxygen fuel cell, a methanol-oxygen fuel cell) or a metal-air battery, it contains an anode and a cathode reaction, in which the oxygen reduction reaction (ORR) kinetics of the cathode is very slow, and the rate is about the same as that of the anode. One-thousandth of the reaction, the overpotential is too high is the bottleneck that limits the output power and energy efficiency of the fuel cell. [0003] Commonly used ORR catalysts include noble metals such as platinum and rhodium. Platinum is considered to be one of the most active single-component electrocatalysts. However, disadvantages such as high cost, poor stability, and easy poisoning limit their practical appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9025H01M4/9083H01M12/06
Inventor 施志聪黄宗雄姚伟聪谭立云李冠州
Owner GUANGDONG UNIV OF TECH
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