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Graphene-molybdenum disulfide composite conductive paste for lithium battery and preparation method thereof

A technology of molybdenum disulfide and composite conduction, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of poor conductivity of conductive paste, short battery cycle life, and low energy density, and achieve improved surface area utilization and safety Enhanced performance and low energy density

Inactive Publication Date: 2017-02-08
张家口龙驰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the poor dispersion of graphene in the current conductive paste, which leads to poor conductivity of the conductive paste, short cycle life of the prepared battery, low energy density, and high production costs, the present invention proposes a graphene for lithium battery. -Molybdenum disulfide composite conductive paste and preparation method, so as to achieve the technical effect of improving the dispersion of graphene, increasing the surface area utilization rate of electrode materials, and greatly improving the conductivity of the positive and negative electrodes of lithium-ion batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put LiCl, molybdenum disulfide, and flake graphite with a particle size of less than 1 mm in a stainless steel reaction kettle, heat it to 600°C, keep it warm for 1 hour, and keep stirring to obtain a graphite-molybdenum disulfide compound intercalated with lithium ions. Wherein, the weight and number ratio of LiCl, molybdenum disulfide and graphite is 3:47:50;

[0032] (2) Mix 96 parts by weight of deionized water, 2 parts of sodium dodecylsulfonate, 1 part of auxiliary filler BYK-161, and 1 part of defoamer polyoxyethylene polyoxypropanolamine ether, and stir Uniform, prepared into a stripper solution;

[0033](3) adding lithium-ion intercalated graphite-molybdenum disulfide compound into the stripper solution, the mass ratio of lithium-ion intercalated graphite-molybdenum disulfide compound to the stripper solution is 5:100, to obtain Lithium-ion intercalated graphite-molybdenum disulfide compound dispersion, and then ultrasonically treat the compound dispersion...

Embodiment 2

[0037] (1) Combine LiCl and LiNO 3 Put molybdenum disulfide and expanded graphite with a particle size of less than 1 mm in a stainless steel reaction kettle, heat to 600 ° C, keep it warm for 1 hour, and keep stirring to obtain graphite-molybdenum disulfide compounds intercalated with lithium ions. Among them, LiCl and LiNO 3 , The ratio of molybdenum disulfide and graphite in parts by weight is 5:45:50;

[0038] (2) The weight ratio is 95 parts of deionized water and absolute ethanol mixture, 2 parts of sodium dodecylsulfonate and sodium dodecylbenzenesulfonate mixture, 1 part of auxiliary filler BYK-161, 2 parts 1 part of antifoaming agent polyoxyethylene polyoxypropanolamine ether mixed, stirred evenly, and prepared into stripping agent solution;

[0039] (3) adding lithium-ion intercalated graphite-molybdenum disulfide compound into the stripper solution, the mass ratio of lithium-ion intercalated graphite-molybdenum disulfide compound to the stripper solution is 5:100, ...

Embodiment 3

[0043] (1) LiCl, Li 2 SO 4 and LiNO 3 Put molybdenum disulfide and highly oriented graphite with a particle size of less than 0 mm in a stainless steel reaction kettle, heat to 650 ° C, keep warm for 5 hours, and keep stirring to obtain graphite-molybdenum disulfide compound intercalated with lithium ions, wherein LiCl, Li 2 SO 4 and LiNO 3 , The weight and number ratio of molybdenum disulfide and highly oriented graphite is 5:45:50;

[0044] (2) Mix 80 parts by weight of toluene, 16 parts of vinylpyrrolidone, 2 parts of auxiliary filler BYK-161, and 2 parts of antifoaming agent polyoxypropylene glyceryl ether, stir evenly, and prepare a stripping agent solution;

[0045] (3) adding the graphite-molybdenum disulfide compound intercalated by lithium ions into the stripper solution, the mass ratio of the graphite-molybdenum disulfide compound intercalated by lithium ions to the stripper solution is 10:100, to obtain Lithium-ion intercalated graphite-molybdenum disulfide co...

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Abstract

The invention provides graphene-molybdenum disulfide composite conductive paste for lithium battery and a preparation method thereof. The method comprises the following steps of: blending a lithium ion or magnesium ion salt, molybdenum disulfide and graphite particles, heating at a high temperature, so that the lithium ion or magnesium ion is intercalated between the graphite and molybdenum disulfide layers; cooling to room temperature, fusing into a solvent, ultrasonically precrushing, thereby obtaining a mixture; ejecting the mixture through a jet nozzle of a high voltage pulse jet machine, and performing further crushing and stripping on the graphite and molybdenum disulfide by utilizing the mechanical shearing and high-speed collision effects of particles, thereby obtaining the graphene-molybdenum disulfide composite conductive paste. According to the composite conductive paste and the preparation method thereof provided by the invention, nanolayers can be effectively prevented from being stacked again, the surface area utilization rate of the electrode material is improved, and the electrical conductivity of the positive and negative poles of the lithium ion battery is greatly improved.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a graphene-molybdenum disulfide composite conductive paste for lithium batteries and a preparation method thereof. Background technique [0002] With the continuous development of industrial production, the rapid growth of traditional energy consumption, and more and more serious environmental pollution, more and more people are beginning to pay attention to the health hazards of air pollutants, and people are more and more vocal about environmentally friendly new energy products. For example, the development of new energy vehicles and other means of transportation has overcome the various harmful exhaust gases emitted by traditional fuel-intensive vehicles, which is very important for the prevention and control of air pollution. The development and use of lithium-ion batteries provide a non-toxic and non-polluting power source for vehicles such as new energy vehicles. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/624H01M4/625Y02E60/10
Inventor 陈庆陈兵王镭迪曾军堂
Owner 张家口龙驰科技有限公司
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