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Electrode preparation technology of super capacitor

A supercapacitor and preparation process technology, applied in the field of capacitors, can solve the problems of removing, limiting the application of supercapacitors, supercapacitor cell capacity, and limiting the performance parameters of cycle life, so as to reduce the energy consumption of products and simplify the drying process. , the effect of a wide operating temperature range

Active Publication Date: 2016-01-06
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that it is difficult to completely remove the moisture inside the pores of activated carbon materials by conventional drying treatment methods, and ultimately make the supercapacitor's operating voltage (usually less than or equal to 2.7V), monomer capacity, cycle life, internal resistance and other properties The parameters are limited, resulting in the mass specific energy of organic supercapacitors being less than 10Wh / kg, which limits the application of supercapacitors in urban public transportation.

Method used

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  • Electrode preparation technology of super capacitor

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Effect test

Embodiment 1

[0031] A kind of supercapacitor electrode preparation process, described preparation process comprises the steps:

[0032] a) Weigh the raw materials according to the following mass percentages: 5% conductive agent, 5% binder polytetrafluoroethylene powder, 90% active material high specific surface area activated carbon; the conductive agent is composed of 3 parts of conductive carbon black and 1 part of graphene mixture;

[0033] b) After the weighing is completed, the powdered activated carbon, the binder polytetrafluoroethylene powder, and the conductive agent are uniformly mixed according to the dry powder, and after mixing for 2 hours, the obtained solid mixture is heated under the action of a super shearer , the temperature is 80°C, shear deformation mixing is carried out, and then the above-mentioned solid mixture is rolled vertically and horizontally respectively to obtain a dry carbon film; the thickness of the dry carbon film is 100 microns;

[0034] c) After pre-sp...

Embodiment 2

[0037] A kind of supercapacitor electrode preparation process, described preparation process comprises the steps:

[0038] a) Take the raw materials by the following mass percentages: 8% conductive agent, 8% binder polytetrafluoroethylene powder, 84% active material high specific surface area activated carbon; the conductive agent is 2 parts of conductive carbon black, 1 part of graphene, 1 part of three-dimensional mixed conductive agent composed of carbon nanotubes;

[0039] b) After the weighing is completed, the powdered activated carbon, the binder polytetrafluoroethylene powder, and the conductive agent are uniformly mixed according to the dry powder, and after mixing for 3 hours, the obtained solid mixture is heated under the action of a super shearer , the temperature is 100°C, shear deformation mixing is carried out, and then the above-mentioned solid mixture is rolled vertically and horizontally respectively to obtain a dry carbon film; the thickness of the dry carbo...

Embodiment 3

[0043] A kind of supercapacitor electrode preparation process, described preparation process comprises the steps:

[0044] a) Weigh raw materials according to the following mass percentages: 10% conductive agent, 10% binder polytetrafluoroethylene powder, 80% active material high specific surface area activated carbon; the conductive agent is composed of 5 parts of conductive carbon black and 2 parts of graphene mixture;

[0045] b) After the weighing is completed, the powdered activated carbon, the binder polytetrafluoroethylene powder, and the conductive agent are uniformly mixed according to the dry powder, and after mixing for 5 hours, the obtained solid mixture is heated under the action of a super shearer , the temperature is 120°C, shear deformation mixing is carried out, and then the above-mentioned solid mixture is rolled vertically and horizontally respectively to obtain a dry carbon film; the thickness of the dry carbon film is 140 microns;

[0046] c) After pre-sp...

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Abstract

The invention relates to an electrode preparation technology of a super capacitor. The preparation technology comprises the following steps: weighing raw materials including a conductive agent, binder polytetrafluoroethylene powder and active substance high specific surface area active carbon; carrying out dry-state powder uniform mixing on the power-state active carbon, the binder polytetrafluoroethylene powder and the conductive agent; carrying out heating under the effect of a super shearing machine, carrying out shearing deformation mixing, and obtaining a dry-state carbon film; spraying conductive resin to the surface of aluminum foil in advance, and forming a conductive coating; and pasting the dry-state carbon film evenly to the conductive coating, carrying out heat-curing, and finally obtaining a dry-method electrode. According to the invention, a high speed airflow mixing technology is adopted to realize uniform mixing among solid powder particles, and simultaneously by means of a deformation structure of PTFE under the high speed shearing condition, the mixing among the active substance, the conductive agent and the binder is realized, so that the electrode sheet high in density, uniform in surface and used for the high performance super capacitor is formed.

Description

technical field [0001] The invention relates to a capacitor, in particular to a supercapacitor preparation process for obtaining electrode sheets with higher electrode density and mass specific energy. Background technique [0002] Supercapacitor (Supercapacitor) is a new type of high-efficiency electrochemical energy storage device between traditional capacitors and batteries. 1 million times) and other advantages, it has been successfully and widely used in urban public transportation (such as energy storage trams, energy storage trolleybuses, subway energy recovery systems, etc.), wind power generation, and heavy machinery (such as port machinery potential energy feedback system) , consumer electronics products (such as computers, mobile phones, etc.) and the military industry have become a new type of high-tech industry with national strategic significance. [0003] At this stage, organic supercapacitors mainly use two electrode preparation processes, one is to directly...

Claims

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Application Information

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IPC IPC(8): H01G11/86
CPCY02E60/13
Inventor 阮殿波杨斌傅冠生
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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