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Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode

A supercapacitor, electrode technology, applied in capacitors, electrolytic capacitors, protection/regulating hybrid/electric double-layer capacitors, etc., can solve the problems of clogging, weak bonding, and insufficient flexibility.

Active Publication Date: 2012-08-15
TIG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional electrode pulping process is one-step pulping, and the pulping process is largely based on experience or qualitative observation and analysis, so the prepared pulp has low solid content and poor dispersion effect. Poor and unstable, high viscosity and unstable and other defects, so that the coated electrode has problems such as poor bonding, powder falling, insufficient flexibility and binder blocking the pores of activated carbon, which further affects its capacity and internal resistance. Isoelectrochemical properties

Method used

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  • Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode
  • Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode
  • Electrode of supercapacitor, preparation method of electrode and preparation method of slurry of electrode

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preparation example Construction

[0056] The schematic diagram of the preparation process of the electrode for the supercapacitor of the present invention is as follows figure 2 , which mainly includes the following steps:

[0057] A. Pulping, that is, mixing active materials, conductive agents, dispersants, binders and solvents to prepare slurry;

[0058] B. Slurry coating, that is, coating the slurry obtained in step A on the current collector to become a pretreatment electrode;

[0059] C. drying, that is, baking the pretreated electrode to remove volatile components therein;

[0060] D. Rolling, that is, rolling and compacting the pretreated pole piece obtained in step C to become an electrode.

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

Embodiment 1

[0063] First, mix 100 parts by mass of activated carbon, 9.3 parts by mass of conductive carbon black, 3.1 parts by mass of dispersant, 3.5 parts by mass of the first binder and 220 parts by mass of water to prepare slurry , the slurry preparation process is as follows:

[0064] Place activated carbon and conductive carbon black in a sealed double-cone high-efficiency mixer for high-speed mixing for 8 hours to obtain a fully mixed and uniform dry mix; then add water and dispersant (the temperature of the dispersant is controlled at 20-55°C), Control the solid content at 70% to 80%, use a power mixer to stir for 1 hour, and mix the materials into wet powder. Continue to add dispersant, control the solid content at 50% to 60%, increase the stirring speed to form a flexible lump material (flexibility refers to the property that the object is not easy to break after being deformed by force); use noodles machine to knead the agglomerate material into a sheet-like elastic material;...

Embodiment 2

[0069] First, mix 100 parts by mass of activated carbon, 9.3 parts by mass of conductive graphite, 3.8 parts by mass of dispersant, 3.4 parts by mass of the first binder, and 272 parts by mass of water to prepare slurry , the slurry preparation process is as follows:

[0070] Place activated carbon and conductive carbon black in a sealed double-cone high-efficiency mixer for high-speed mixing for 8 hours to obtain a fully mixed and uniform dry mix; then add water and dispersant (the temperature of the dispersant is controlled at 20-55°C), Control the solid content at 70% to 80%, use a power mixer to stir for 1 hour, and mix the materials into wet powder. Continue to add dispersant, control the solid content at 50% to 60%, increase the stirring speed to form a flexible mass material; use a noodle machine to glue the mass material into a sheet-like elastic material; The material is baked in a blast oven at 120°C for 8 hours to obtain a dry sheet-shaped elastic material; use a g...

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Abstract

The invention provides a preparation method of slurry for an electrode of a supercapacitor, the electrode of the supercapacitor and a preparation method of the electrode of the supercapacitor. A eight-stage slurry preparation process is adopted in the preparation method of the slurry, and the preparation method of the slurry comprises the following steps of: I, dry mixing; II, wet mixing; III, lumping; IV, rubber mixing; V, roasting; VI, pelleting; VII, smashing; and VIII, slurry forming. The preparation method of the slurry can be used for increasing the solid content of the slurry, reducing the using amount of an adhesive, improving the dispersing effect of the slurry, realizing the quantitative control for the slurry preparation process and achieving better process stability and consistency. The electrode prepared by using the slurry has the advantages that the strength of the electrode is enhanced, the internal resistance of the electrode is reduced, the electrochemical stability and the structural stability of the electrode are improved, the reliability of the supercapacitor with the electrode is improved, and the service life of the supercapacitor is prolonged.

Description

technical field [0001] The invention relates to a supercapacitor, in particular to an electrode for a supercapacitor, a preparation method thereof, and a method for preparing a slurry for a supercapacitor electrode. Background technique [0002] Supercapacitor is a new type of energy storage device, which combines high energy density, high power density, long life (more than hundreds of thousands of times) and other characteristics. In addition, it also has large capacity, small internal resistance, fast charging and discharging speed, working Wide temperature range (-40°C ~ 65°C), maintenance-free, high reliability, etc., are very useful in the fields of new energy (wind energy and solar energy), communications, digital electronics, electric power, automobiles, engineering machinery, military and aerospace. Wide range of applications. [0003] The electrode is the core component of the supercapacitor, which is composed of the active material layer and the current collector...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCH01G11/16Y02E60/13
Inventor 李兵廖运平陈名柱张利
Owner TIG TECH CO LTD
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