Flowerlike manganese dioxide/carbon composite material and preparation method and application thereof

A technology of carbon composite materials and manganese dioxide, which is applied in the direction of secondary batteries, electrochemical generators, active material electrodes, etc., can solve the problems of unfavorable industrial production, complex composite process, poor stability, etc., to achieve full reaction, Simple process and good conductivity

Active Publication Date: 2019-11-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome MnO in the prior art 2 And its carbon material has poor stability, complex composite process, high cost, and is not conducive to realizing the defects or deficiencies of industrialized production. A preparation method for flower-shaped manganese dioxide / carbon composite material is provided

Method used

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  • Flowerlike manganese dioxide/carbon composite material and preparation method and application thereof
  • Flowerlike manganese dioxide/carbon composite material and preparation method and application thereof
  • Flowerlike manganese dioxide/carbon composite material and preparation method and application thereof

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Embodiment 1

[0040] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process.

[0041] To the 200mL5mmol / L H 2 SO 4 Add 1 g of Super P to the glass bottle of the solution and ultrasonicate for 30 minutes to form a dispersion. Then add 200mL 0.2mol / L KMnO to the above dispersion 4 The aqueous solution was mixed uniformly and reacted with magnetic stirring at 80°C in an oil bath for 2 hours. After cooling, it was filtered and washed with deionized water three times, and dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.

Embodiment 2

[0043] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process.

[0044] Add 1 g of acetylene black to a glass bottle containing 200 mL of 10 mmol / L HCl solution and ultrasonicate for 30 minutes to form a dispersion. Then add 200mL 0.1mol / L KMnO to the above dispersion 4 The aqueous solution was mixed uniformly and reacted with magnetic stirring in an oil bath at 90°C for 3 hours. After cooling, it was filtered and washed with deionized water for 3 times, and air-dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.

Embodiment 3

[0046] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process. Add 3.2 g of Super P to a glass bottle containing 200 mL of 10 mmol / L HCl solution and ultrasonicate for 30 min to form a dispersion. Then add 200mL 0.1mol / L KMnO to the above dispersion 4 The aqueous solution was mixed uniformly and reacted with magnetic stirring in an oil bath at 90°C for 3 hours. After cooling, it was filtered and washed with deionized water three times, and dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.

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Abstract

The invention relates to a flowerlike manganese dioxide / carbon composite material and a preparation method and application thereof. The preparation method comprises the steps that S1, a carbon material and an acid solution are mixed, and a dispersion liquid is obtained through dispersion; S2, a potassium permanganate solution is added into the dispersion liquid for a reaction at the temperature of60-95 DEG C under a stirring condition; and S3, after the reaction is over, washing, suction filtering and drying are performed, and then the flowerlike manganese dioxide / carbon composite material isobtained. Through the preparation method, raw materials are easy to obtain, reserves are rich, price is low, the process is simple, high-temperature and high-pressure treatment is not needed, and industrial production is benefited; the prepared flowerlike manganese dioxide / carbon composite material has good conductivity, active substances can quickly and sufficiently react, and stability is good;and since MnO<2> of a layered crystal structure is large in capacity, a formed battery can provide higher specific capacity, the application range of the battery is expanded, and accordingly the competitiveness of the battery is improved.

Description

Technical field [0001] The invention belongs to the field of secondary batteries, and specifically relates to a flower-shaped manganese dioxide / carbon composite material and a preparation method and application thereof. Background technique [0002] Energy storage devices with ideal reversibility, rapid charge and discharge capabilities, safety, low cost, and environmental friendliness are extremely important to modern society. [0003] Due to environmental friendliness and low cost, MnO 2 And its composite materials have long been used as promising electrode materials in various energy devices, such as primary Zn-MnO 2 Batteries, lithium ion batteries and super capacitors. Zinc ion batteries that can be cyclically charged and discharged are based on MnO 2 The material is the cathode, zinc metal is used as the anode and the zinc ion aqueous solution is used as the electrolyte. The energy storage is based on the zinc ions in the cathode MnO 2 The deintercalation behavior on the anod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M10/054
CPCH01M4/483H01M4/628H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 李冠洲施志聪黄荣杰
Owner GUANGDONG UNIV OF TECH
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