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Preparation method of C/MnO composite electrode material

A composite electrode and mixed liquid technology, which is applied in the direction of hybrid capacitor electrodes, battery electrodes, circuits, etc., can solve the problems of unfavorable product industrialization, environmental pollution, and complicated process, and achieve the effect of improving the wrapping rate, improving the dispersion effect, and simple process

Inactive Publication Date: 2018-01-05
GUANGXI NORMAL UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing compounding method has complicated process, high energy consumption, serious waste of raw materials, a large amount of acid and alkali substances are used in the compounding process, and improper handling can easily cause environmental pollution, which is not conducive to the industrialization of products

Method used

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  • Preparation method of C/MnO composite electrode material
  • Preparation method of C/MnO composite electrode material
  • Preparation method of C/MnO composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Prepare 1L of MnSO with a concentration of 0.25mol / L respectively 4 solution and 0.5L of NH with a concentration of 0.25mol / L 4 HCO 3 solution, mix the two solutions, and add 2.22g of PEG600 to the solution, with a mass fraction of 7% H 2 SO 4 Adjust the pH value of the solution to control the pH of the solution to 6.5.

[0025] Step 2: Put the mixed solution in an ice-water bath and stir for 2 hours at a speed of 180 r / min. After the reaction, filter the solution, rinse the precipitate with deionized water, and then dry it at 60° C. for 6 hours to obtain a precursor.

[0026] Step 3: Mix 100g of precursor with 4g of graphene, and then add it into a ball mill, the temperature of the ball mill is 45°C, the speed of the ball mill is 500r / min, and after 0.5h of ball milling, add a mixture containing 0.25g of E51 epoxy resin and 4.75g of PEG600 , continue ball milling for 1.5h, and take out the mixture after ball milling.

[0027] Step 4: Place the mixture in H...

Embodiment 2

[0029] Step 1: Prepare 1L of MnSO with a concentration of 0.25mol / L respectively 4 solution and 0.15L of NH with a concentration of 0.25mol / L 4 HCO 3 solution, the two solutions were mixed, and 1.89g of PEG600 was added to the solution, and the pH value of the solution was adjusted with a mass fraction of 10% HCl, and the pH of the solution was controlled to be 6.

[0030] Step 2: Stir the mixture in an ice-water bath at a speed of 200 r / min for 1.5 h. After the reaction, filter the solution, rinse the precipitate with deionized water, and dry at 40° C. for 7 h to obtain a precursor.

[0031] Step 3: Mix 100g of precursor with 2g of graphene, and then add it into the ball mill, the temperature of the ball mill is 30°C, the speed of the ball mill is 300r / min, after 0.5h of ball milling, add the mixture containing 0.125g of E51 epoxy resin and 6.125g of PEG600 , continue ball milling for 1 h, and take out the mixture after ball milling.

[0032] Step 4: Place the mixture in H...

Embodiment 3

[0034] Step 1: Prepare 1L of MnSO with a concentration of 0.25mol / L respectively 4 solution and 1 L of NH with a concentration of 0.25 mol / L 4 HCO 3 solution, mix the two solutions, and add 2 g of PEG600 to the solution, with a mass fraction of 7% H 2 SO 4 Adjust the pH value of the solution, and control the pH of the solution to be 7.

[0035] Step 2: Put the mixed solution in an ice-water bath and stir for 2 hours at a speed of 80 r / min. After the reaction, filter the solution, rinse the precipitate with deionized water, and then dry it at 60° C. for 3 hours to obtain a precursor.

[0036] Step 3: Take 100g of the precursor and mix it with 3g of graphite, and then add it into the ball mill, the temperature of the ball mill is 30°C, the speed of the ball mill is 400r / min, after 0.5h of ball milling, add the mixture containing 0.2g of E51 epoxy resin and 5.8g of PEG600, Continue ball milling for 2h, and take out the mixture after ball milling.

[0037] Step 4: Place the m...

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Abstract

The invention discloses a preparation method of a C / MnO composite electrode material, and belongs to the technical field of composite materials. The preparation method comprises the following steps: configuring an MnSO4 solution with the concentration of 0.25 mol / L and an NH4HCO3 solution with the concentration of 0.25 mol / L respectively, mixing the MnSO4 solution and the NH4HCO3 solution in the volume ratio of 1: (0.15 to 1), then adding PEG600 into the solution, and controlling the pH of the solution to be 6 to 7; putting the mixed liquor into an ice-water bath for stirring for 1.5 to 2 h, filtering the solution after the reaction is ended, washing the precipitate with deionized water, and then drying to obtain a precursor; mixing a carbon source and the precursor in a mass ratio of 1: (25 to 50), then carrying out mechanical ball-milling for 0.5 h, adding E51 epoxy resin / PEG 600, continuously carrying out ball-milling for 1 to 2 h, and then taking out a ball-milling product; puttingthe ball-milling product into H2 / Ar mixed gas for calcinations, carrying out natural furnace cooling after the reaction is ended, and finally obtaining the C / MnO composite material. The C / MnO composite material prepared in the invention is stable in performance and high in specific capacity; the method is simple in technology, mild in reaction conditions, low in cost and high in production efficiency, and is applicable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a capacitor electrode material. Background technique [0002] Lithium batteries have the advantages of high voltage, large specific capacity, long cycle life, good safety performance, and fast charging. Its market share is increasing year by year. The traditional anode material of lithium batteries is graphite, and the theoretical specific volume of graphite is 372mAh / g, which is too low to meet people's needs. Therefore, there is an urgent need for a lithium battery anode material with a large specific capacity to replace graphite. [0003] MnO has a wide source, low price, safety and non-toxicity, and its theoretical specific capacity value is as high as 755mAh / g, which is much higher than the existing graphite anode material. It is an ideal material for preparing lithium battery anode. However, the kinetic performance of MnO is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/583H01M4/62H01M10/052H01G11/30H01G11/46H01G11/32H01G11/44
CPCY02E60/10
Inventor 蓝峻峰覃逸明
Owner GUANGXI NORMAL UNIV OF SCI & TECH
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