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Manufacturing method for laminated electrode, carbon film and manufacturing method for carbon film

An electrode and stacking technology, which is applied in the field of supercapacitor electrode preparation, can solve problems such as difficult to guarantee performance consistency, reduced capacity and cycle performance, and no competitive advantage in products, so as to achieve high active material loading and strengthen fibrosis effect, the effect of low internal resistance

Active Publication Date: 2015-06-17
TIG TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The activated carbon fiber weaving process has the advantages of simple assembly process, small equipment investment, and electrodes can be cut to any size, but its performance is greatly affected by the uniformity of carbon fiber cloth and the quality of the sprayed aluminum layer, and the consistency of performance is not easy to guarantee; And the volume energy density of the product is low, only half of the activated carbon supercapacitor, resulting in no competitive advantage for the product
The activated carbon powder-coated electrode manufacturing process can realize low-cost continuous production, but there are also problems such as poor electrochemical stability, and the binder is easy to block the pores of activated carbon, resulting in reduced capacity and cycle performance, and the manufacturing process of the slurry is also difficult. There are certain environmental issues

Method used

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  • Manufacturing method for laminated electrode, carbon film and manufacturing method for carbon film
  • Manufacturing method for laminated electrode, carbon film and manufacturing method for carbon film
  • Manufacturing method for laminated electrode, carbon film and manufacturing method for carbon film

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preparation example Construction

[0043] The present invention is used for the preparation method flow chart of the laminated electrode of supercapacitor as follows figure 2 As shown, it mainly includes the following steps:

[0044] Step 1: Prepare a carbon membrane according to the aforementioned carbon membrane preparation method;

[0045] Step 2: Coating the conductive paste on the current collector by extrusion coating, and then drying to obtain a conductive current collector;

[0046] Step 3: Laminate the carbon film and the conductive current collector, heat and roll, and dry to prepare a laminated electrode for a supercapacitor.

[0047] In a specific embodiment of the present invention, the current collector may be aluminum foil or etched aluminum foil.

Embodiment 1

[0050] In the first step, 94 parts by mass of activated carbon, 4 parts by mass of conductive carbon black, and 2 parts by mass of PTFE (polytetrafluoroethylene) dispersion resin are stirred and mixed according to the proportioning ratio. In the second step, 200 parts by mass of water are added to the mixed materials, and stirring is performed to fully mix the materials. It is also preferable to introduce a high-shear dispersing device and design an improved automatic stirring and dispersing process system, so that the processed materials can have a strong dispersion and crushing effect, and finally achieve the purpose of rapid ultra-fine dispersion. The third step is to add the mixed wet powder into the closed mixer, and in the high-temperature and high-pressure internal mixer, knead, disperse, and mix in a short period of time (2 to 12 minutes), so as to enhance the plasticity of the material , Make the wet powder material subject to strong shearing, extrusion and stirring, ...

Embodiment 2

[0054] The difference with embodiment one is that the proportioning of the mixture of the present embodiment is the activated carbon of 90 parts by mass, the conductive carbon black of 5 parts by mass, the PTFE (polytetrafluoroethylene) dispersion resin of 5 parts by mass; and Add 100 parts by mass of water during wet mixing; add 18 parts by mass of naphtha to the dough before preforming. The carbon film obtained by the preparation method of this example has good mechanical properties such as strength, toughness and bending resistance. It is obtained through experiments and tests that there is still no crease after 20 times of 90° bending, the thickness is ≥ 280 μm, and the bulk density is ≥ 0.6g / cm 3 , specific capacity ≥1.2F / cm 2 .

[0055] The scanning electron microscope image of the surface of the laminated electrode prepared after the carbon film prepared in this example and the aluminum foil coated with the conductive intermediate layer on both sides is overlapped an...

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Abstract

The invention discloses a manufacturing method for a laminated electrode, a carbon film and a manufacturing method for the carbon film. According to the manufacturing method for the carbon film of the laminated electrode, dry mixing, wet mixing, closed mixing, pushing-pressing forming, calendaring and drying are performed on active material, conductive additives and adhesion agents, the manufactured carbon film of the laminated electrode and a conductive current collector are laminated to form the laminated electrode, and the laminated electrode is suitable for a super capacitor. According to the manufacturing method for the carbon film, the raw materials are sufficiently and evenly mixed through the steps of dry mixing, wet mixing and closed mixing, and then through the follow-up machining technology, the carbon film which has good strength, toughness, bending resistance and other mechanical properties and is high in bulk density and capable of being continuously manufactured is formed. The carbon film obtained through the manufacturing method is laminated on the conductive current collector, so that the manufactured laminated electrode has the advantages of being high in loading capacity of active matter, low in internal resistance, high in chemical stability, long in service life and the like.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode preparation, in particular to a method for preparing a laminated electrode, a carbon film and a method for preparing the same. Background technique [0002] Supercapacitors have the advantages of fast charging and discharging, long cycle life, wide operating temperature range, and no pollution to the environment. They have become an emerging green energy and are widely used in new energy vehicles, rail transit, wind energy, solar energy, smart grids, etc. An important strategic emerging industrial field related to the national economy and people's livelihood. Today, with the depletion of fossil energy and the increasingly stringent requirements for carbon emissions, vigorously promoting the use of supercapacitors has a very positive effect on energy saving, emission reduction, and carbon emission reduction. [0003] At present, the electrodes of supercapacitors are mainly prepare...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24
CPCY02E60/13H01G11/86H01G11/24H01G11/32
Inventor 陈名柱陈杰廖运平
Owner TIG TECH CO LTD
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