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High-porosity and high-conductivity porous electrode, batch manufacturing process of porous electrode and super pseudo-capacitor using porous electrode

A porous electrode and high conductivity technology, applied in the electrode field, can solve the problems of low production efficiency, unsolved porous electrode equipment selection, unsolved large-scale porous electrode manufacturing process, etc., to achieve good conductivity, easy mass production, The effect of simple process

Inactive Publication Date: 2015-03-18
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Chinese patent CN103274386A proposes a formula for manufacturing porous electrodes and a method for preparing porous electrodes in a small amount in the laboratory, and the production efficiency is low; it does not solve the manufacturing process of large-scale and industrial batch preparation of porous electrodes, and does not solve the problem of equipment selection for batch preparation of porous electrodes

Method used

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  • High-porosity and high-conductivity porous electrode, batch manufacturing process of porous electrode and super pseudo-capacitor using porous electrode
  • High-porosity and high-conductivity porous electrode, batch manufacturing process of porous electrode and super pseudo-capacitor using porous electrode
  • High-porosity and high-conductivity porous electrode, batch manufacturing process of porous electrode and super pseudo-capacitor using porous electrode

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preparation example Construction

[0034] The preparation method of the porous electrode is as follows:

[0035] (1) Dry carbon nanotubes (CNTs) and conductive carbon black at 100°C for 24 hours;

[0036] (2) According to the mass ratio m 1 (CNTs): m 2 (Conductive carbon black)=n (n=1~9) carbon nanotube and conductive carbon black are mixed and stirred evenly;

[0037] (3) The binder PTFE emulsion (solid content X=10~60%), the pore-forming agent PEG-400, and the dispersant deionized water are mixed according to the mass ratio m 3 :m 4 :m 5 =0.6~1.2:1.6~2.0:16~40 mixed evenly;

[0038] (4) the solution in (3) by mass ratio m 3 :(m 1 +m 2 ) = 5-20% is added to the mixed powder in (2), and stirred evenly with a stirring device (linear speed of the mixer γ=10-50m / s, stirring time t=24-48h);

[0039] (5) Transfer the stirred slurry to the tray, vibrate the tray to spread the slurry evenly to a certain thickness (thickness d=4~15mm);

[0040] (6) Place the tray in the drying equipment and set the heating te...

Embodiment 1

[0044] Example 1 Preparation of Porous Electrode

[0045] With carbon nanotubes as the carbon material, PTFE emulsion as the binder, polyethylene glycol 400 as the pore-forming agent, the mass ratio of carbon nanotubes to PTFE is 95:5, and the mass of polyethylene glycol is the sum of the mass of the former two 40% of the above three materials, blend the above three materials, add isopropanol to disperse and stir evenly, dry, pulverize, and sieve to prepare the carbon powder precursor, and then carry out grading and rolling for multiple times to form an electrode sheet with a thickness of 1mm. The pole piece is flexible and has good mechanical strength. It is cut according to the size of the battery electrode, and placed in an oven for 3 hours at 180°C. The scanning electron micrographs of the carbon nanotube porous electrode prepared in embodiment 1 are shown in figure 2 and image 3 , figure 2 The scale bar in is 5 μm; image 3 The scale bar in is 100 μm. The average ...

Embodiment 2

[0047] Graphene is used as carbon material, PTFE emulsion is used as binder, polyethylene glycol 400 is used as pore forming agent, the mass ratio of graphene and PTFE is 90:10, and the quality of polyethylene glycol is 40% of the total mass of the former two. %, blend the above three materials, add isopropanol to disperse and stir evenly, dry, pulverize, and sieve to prepare the carbon powder precursor, and then carry out grading and rolling for multiple times to form an electrode sheet with a thickness of 1mm, with a uniform surface , cut according to the size of the battery electrode, placed in an oven and baked at 150°C for 5h. The average pore size of the porous electrode is 10-50 μm, and the pore size distribution is uniform. The prepared porous electrode has good liquid absorption performance, and the porosity reaches 85%.

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Abstract

The invention relates to an electrode and in particular relates to a high-porosity and a high-conductivity porous electrode, a batch manufacturing process of the porous electrode and a super pseudo-capacitor using the porous electrode. The high-porosity and a high-conductivity porous electrode is prepared by the steps of mixing a carbon material with an adhesive, a pore-forming agent and a dispersing agent to obtain slurry, drying the slurry and then rolling the slurry grade by grade to form a forming carbon film, and roasting the forming carbon film; the porous electrode is of a three-dimensional network porous structure; the porous diameter is distributed between 0.1 microns and 50 microns; the thickness of the porous electrode is 0.3-5mm; the porosity is greater than or equal to 70%. The porous electrode has a special micropore structure and a high porosity; the porous diameter distribution is centralized in a range of several microns to 50 microns; the porosity of the electrode is greater than 70%. The porous structure is of a plane structure and has the advantages of high flexibility and bendability; the defects of small porous diameter, small macropore porosity and frangibility of the existing various electrodes made of dense and frangible materials can be overcome.

Description

technical field [0001] The invention relates to an electrode, in particular to a porous electrode with high porosity and high conductivity, its batch manufacturing process and a pseudoelectric supercapacitor using the porous electrode. Background technique [0002] With global warming and lack of resources, countries and regions all over the world are developing new green and environmentally friendly energy sources, and the materials used in the production of supercapacitors are generally green and environmentally friendly. Due to its broad application prospects and huge potential market, supercapacitors have become a research hotspot in the international energy field. Due to the advantages of fast charging and discharging, no pollution to the environment, and long cycle life, supercapacitors are expected to become a new type of green energy in this century. Because of the many significant advantages of supercapacitors, they have huge application value and market potential ...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/86
CPCH01G11/00H01G11/24H01G11/26H01G11/86Y02E60/13
Inventor 杨贞胜柯克汪勇汪彦龙
Owner CHAOWEI POWER CO LTD
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