Preparation method of battery-grade graphite-activated carbon composite material

A composite material and activated carbon technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve high charge and discharge capacity, low content of inorganic salt impurities, and wide particle size distribution

Inactive Publication Date: 2016-11-09
HUBEI UEE ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] In order to fundamentally solve the main limitations of the existing manufacturing of battery-grade activated carbon and related problems in the application of activated carbon, the purpose of the present invention is to provide a method for preparing battery-grade graphite/activated carbon composite materials, whi

Method used

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  • Preparation method of battery-grade graphite-activated carbon composite material
  • Preparation method of battery-grade graphite-activated carbon composite material
  • Preparation method of battery-grade graphite-activated carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example 1:

[0056] A kind of preparation method of battery grade graphite / activated carbon composite material, its steps and process conditions are:

[0057] The first step is to wash the rice husk with distilled water, put it into a metal can and seal it, put it in a muffle furnace, heat it at a constant temperature of 450°C for 4 hours, and cool it down to room temperature naturally to obtain black solid activated carbon;

[0058] In the second step, the mixture of black solid activated carbon and graphite obtained in the first step is placed in a ball mill tank in a mass ratio of 10:1, and an appropriate amount of hydrochloric acid, sulfuric acid, acetic acid solution, and distilled water are used successively with a concentration of 0.2M. ; under the condition that the material-ball mass ratio is equal to 1:10, ball milling is performed for 3, 2, 1, and 0.5 hours respectively, that is, the ball milling acid is washed 3 or 4 or 5 times, and the ball milling water is...

Example Embodiment

[0061] Example 2:

[0062]A kind of preparation method of battery grade graphite / activated carbon composite material, its steps and process conditions are:

[0063] The first step is to wash the peanut shells with twice-distilled water, put them in a metal can and seal them, put them in a muffle furnace, heat them at a constant temperature of 550°C for 6 hours, and cool them down to room temperature naturally to obtain black solid activated carbon;

[0064] In the second step, the black solid activated carbon obtained in the first step and graphite are placed in a ball milling tank in a mass ratio of 8:1, and are respectively used with appropriate amount of hydrochloric acid, sulfuric acid, acetic acid solution, sulfuric acid, and dihydrochloric acid with a concentration of 0.4M. Secondary distilled water; under the condition that the mass ratio of material to ball is equal to 1:15, ball mill for 2, 1, 0.5, and 3 hours respectively, that is, "ball mill pickling" and "ball mill...

Example Embodiment

[0067] Embodiment 3:

[0068] A kind of preparation method of battery grade graphite / activated carbon composite material, its steps and process conditions are:

[0069] The first step is to wash the bamboo rods with deionized water, put them into metal cans, seal them, place them in a muffle furnace, heat them at a constant temperature of 650°C for 4 hours, and cool them down to room temperature naturally to obtain black solid activated carbon;

[0070] In the second step, the black solid activated carbon obtained in the first step and the graphite are placed in a ball milling tank in a mass ratio of 6:1, and are successively used with an appropriate amount of hydrochloric acid, sulfuric acid, acetic acid solution, sulfuric acid, and acetic acid solution that have a concentration of 0.6M. Ionized water; ball milling for 1, 0.5, 3, and 2 hours respectively under the condition that the mass ratio of material to ball is equal to 1:20, that is, "ball milling pickling" and "ball mi...

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Abstract

The invention discloses a preparation method of a battery-grade graphite-activated carbon composite material. The preparation method comprises the steps that 1, plant raw materials are washed clean with water and then contained in a metal tank, the metal tank is sealed and put into a muffle furnace, heating is conducted at the constant temperature of 450 DEG C to 650 DEG C, the temperature is naturally decreased to room temperature, and black solid activated carbon is obtained; 2, the obtained black solid activated carbon and graphite are put into a ball milling tank according to the mass ratio of 3:1-1:1, an appropriate amount of hydrochloric acid with the concentration of 0.2 M to1.0 M, an appropriate amount of sulfuric acid with the concentration of 0.1 M to 0.5 M, an appropriate amount of acetic acid with the concentration of 0.5 M to 1.2 M and an appropriate amount of water are sequentially added into the ball milling tank, ball milling is conducted for 0.5 hour to 2 hours under the condition that the ball-material ratio is equal to 1:10-1:20, and then acid washing and water washing are sequentially conducted, wherein sulfuric acid, hydrochloric acid and acetic acid are subjected to ball-milling washing three times to five times separately, and the water is subjected to ball-milling washing until the pH value of eluate is 6.8 to 7.2; 3, the washed graphite-activated carbon mixture is subjected to suction filtration and dried in an atmospheric environment, and the battery-grade graphite-activated carbon composite material is obtained. The preparation method has the advantages of being simple in process, rich in raw materials, short in manufacturing cycle and low in energy consumption and has good economic benefits, environmental benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a method for preparing battery-grade graphite / activated carbon composite materials. Background technique [0002] Lithium-ion batteries are mainly composed of positive pole pieces, negative pole pieces, separators, electrolytes, and battery casings (including stainless steel shells, plastic shells, and aluminum-plastic film flexible packaging, etc.). Wherein, the negative pole piece is mainly composed of negative active materials, additives and binders. The negative electrode active materials used to manufacture negative electrode sheets of lithium-ion batteries are usually "natural negative electrode graphite" or "modified graphite" or "artificial graphite", as well as carbon nanotubes, graphene, etc., the synthesis technology of graphite materials, the processing of materials and Electrochemical properties, etc., are relatively stable and mature, and the source of na...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M10/0525
CPCH01M4/583H01M10/0525Y02E60/10
Inventor 项朗李闯余冲杨静林定文张文博舒方君丁先红周环波
Owner HUBEI UEE ENERGY TECH CO LTD
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