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graphene/cnts/super-p composite conductive agent, composite conductive agent slurry and preparation method thereof

A technology of composite conductive agent and slurry, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of not having and not meeting, and achieve the effects of convenient application, effective contact, and simple process

Active Publication Date: 2017-04-05
GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing commercialized conductive agents are mainly carbon materials, mainly including conductive graphite, conductive carbon black, and carbon nanotubes. The above-mentioned conductive agents have their own advantages, but they do not have the above-mentioned characteristics that an excellent conductive agent should have. Unable to meet the needs of conductive agents for power lithium-ion batteries, therefore, it is necessary to develop new conductive agents

Method used

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  • graphene/cnts/super-p composite conductive agent, composite conductive agent slurry and preparation method thereof
  • graphene/cnts/super-p composite conductive agent, composite conductive agent slurry and preparation method thereof
  • graphene/cnts/super-p composite conductive agent, composite conductive agent slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1. A kind of preparation method of Graphene / CNTs / Super-P composite conductive agent, its concrete steps are as follows:

[0042] (1) Mixing: Add 100g of graphene oxide slurry with a solid content of 10% into a single-layer glass reactor, add 5g of CNTs, 5g of Super-P and 0.2g of surfactant polyvinylpyrrolidone, mechanically stir for 30min, and then ultrasonically disperse 30min, make it mix evenly;

[0043] (2) Pulverization: Suction filter the mixed slurry in step (1), and dry it at 100°C until the water content is ≤5%, and pulverize the dried solid with a pulverizer so that the particle size of the pulverized particles is ≤74μm;

[0044] (3) Expansion: Heat the muffle furnace to raise the temperature to 300°C, quickly put the mixture particles pulverized in step (2) into the muffle furnace, puff them in the air for 5 minutes, take them out quickly, and cool to room temperature;

[0045] (4) Reduction: The mixture in step (3) was placed in a tube furnace a...

Embodiment 2

[0057] Embodiment 2. A kind of preparation method of Graphene / CNTs / Super-P composite conductive agent, its concrete steps are as follows:

[0058] (1) Mixing: Add 100g of graphene oxide slurry with a solid content of 20% into a single-layer glass reactor, add 10g of CNTs, 10g of Super-P and 0.4g of surfactant polyvinylpyrrolidone, mechanically stir for 30min, and then ultrasonically disperse 30min, make it mix evenly;

[0059] (2) Pulverization: Suction filter the mixed slurry in step (1), and dry it at 100°C until the water content is ≤5%, and pulverize the dried solid with a pulverizer so that the particle size of the pulverized particles is ≤74μm;

[0060] (3) Expansion: Heat the muffle furnace to raise the temperature to 300°C, quickly put the mixture particles pulverized in step (2) into the muffle furnace, puff them in the air for 5 minutes, take them out quickly, and cool to room temperature;

[0061] (4) Reduction: The mixture in step (3) was placed in a tube furnace...

Embodiment 3

[0065] Embodiment 3. A kind of preparation method of Graphene / CNTs / Super-P composite conductive agent, its concrete steps are as follows:

[0066] (1) Mixing: Add 100g of graphene oxide slurry with a solid content of 5% into a single-layer glass reactor, add 2.5g of CNTs, 2.5g of Super-P and 0.1g of surfactant polyvinylpyrrolidone, stir mechanically for 30min, and then Ultrasonic dispersion for 30 minutes to make it evenly mixed;

[0067] (2) Pulverization: Suction filter the mixed slurry in step (1), and dry it at 100°C until the water content is ≤5%, and pulverize the dried solid with a pulverizer so that the particle size of the pulverized particles is ≤74μm;

[0068] (3) Expansion: Heat the muffle furnace to raise the temperature to 300°C, quickly put the mixture particles pulverized in step (2) into the muffle furnace, puff them in the air for 5 minutes, take them out quickly, and cool to room temperature;

[0069] (4) Reduction: The mixture in step (3) was placed in a ...

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Abstract

The present invention discloses a graphene / CNTs / Super-P composite electric conduction agent, a composite electric conduction agent slurry, and preparation methods of the graphene / CNTs / Super-P composite electric conduction agent and the composite electric conduction agent slurry, wherein the composite electric conduction agent comprises graphene, CNTs (carbon nano-tubes) and Super-P (electric conduction carbon black). The preparation method comprises: adding a graphene oxide slurry, carbon nano-tubes, electric conduction carbon black and a surfactant to a reaction kettle, uniformly stirring, carrying out complete ultrasonic dispersion, drying, crushing, adding the crushed mixture to a muffle furnace, puffing in air, carrying out a reduction treatment in an inert atmosphere, and cooling to a room temperature to obtain the composite electric conduction agent powder, wherein the composite electric conduction powder can further be mixed with a solvent, and stirring and ultrasonic dispersion are performed to prepare the composite electric conduction agent slurry. According to the present invention, the composite electric conduction agent has excellent performances, and is suitable for being used as the electric conduction agent of power ion batteries; and the used preparation process has characteristics of simpleness and low energy consumption, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of energy and new materials, and relates to a composite conductive agent for a power lithium-ion secondary battery and a preparation method thereof, in particular to a Graphene / CNTs / Super-P composite conductive agent, a composite conductive agent slurry and a preparation method thereof . Background technique [0002] Lithium-ion batteries are widely used in portable electronic devices such as mobile phones, notebook computers, and cameras because of their high capacity, high voltage, long cycle life, good safety, and no memory effect. As people are increasingly concerned about the environmental pollution caused by fuel vehicles, in recent years, the application of lithium-ion batteries as a power source in electric vehicles has attracted people's attention. The application of lithium-ion batteries as a power source in electric vehicles must first meet the needs of fast charging and discharging. In order to improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62
CPCH01M4/624Y02E60/10
Inventor 曾洪华曾宪武
Owner GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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