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Preparation process of supercapacitor electrode

A technology of supercapacitor and preparation process, applied in the manufacture of hybrid/electric double-layer capacitors, etc., can solve the problems of low mechanical strength, poor cycle performance and low power density of dry carbon film, and achieve convenient control, enhanced stability, The effect of high power density

Active Publication Date: 2021-08-17
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prepared dry carbon film has low mechanical strength, high internal resistance, low power density, and poor cycle performance, which limits the application of supercapacitors in urban public transportation, wind power generation and other fields.

Method used

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  • Preparation process of supercapacitor electrode
  • Preparation process of supercapacitor electrode
  • Preparation process of supercapacitor electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation process for a supercapacitor electrode, specifically comprising the following steps:

[0029] Step a, take by weight 90 parts of activated carbon, 5 parts of polytetrafluoroethylene and 5 parts of conductive carbon black and mix them in a mixer at a stirring speed of 60r / min to obtain active powder. The temperature of the above mixing is 15 ℃;

[0030] Step b, mixing the above-mentioned active powder in a high energy ball mill at 200r / min for 3h to obtain a solid mixture;

[0031] Step c, spraying a layer of conductive adhesive with a thickness of 3 μm on the surface of the aluminum foil to form a conductive coating; rolling the above-mentioned solid mixture vertically and horizontally at 90° C. to obtain a dry carbon film, and pasting the conductive coating, After curing at 120°C for 5h, supercapacitor electrodes were obtained.

Embodiment 2

[0033] A preparation process for a supercapacitor electrode, specifically comprising the following steps:

[0034] Step a. Weigh 82 parts of activated carbon, 8 parts of polytetrafluoroethylene and 10 parts of conductive agent in a blender at a stirring speed of 120r / min to obtain active powder. The temperature of the above mixing is 10°C , the above-mentioned conductive agent is carbon nanotubes and graphene with a mass ratio of 1:2;

[0035] Step b, mixing the above-mentioned active powder in a high-energy ball mill at 400r / min for 1.5h to obtain a solid mixture;

[0036] Step c, spraying a layer of conductive adhesive with a thickness of 3 μm on the surface of the aluminum foil to form a conductive coating; rolling the above-mentioned solid mixture vertically and horizontally at 90° C. to obtain a dry carbon film, and pasting the conductive coating, After curing at 90°C for 6h, supercapacitor electrodes were obtained.

Embodiment 3

[0038] A preparation process for a supercapacitor electrode, specifically comprising the following steps:

[0039] Step a, weigh 88 parts of activated carbon, 4 parts of polytetrafluoroethylene and 8 parts of graphene in a mixer at a stirring speed of 150r / min to obtain active powder by weight, and the temperature of the above mixing is 5°C ;

[0040] Step b, mixing the above-mentioned active powder in a high-energy ball mill at 400r / min for 2h to obtain a solid mixture;

[0041] Step c, spraying a layer of conductive adhesive with a thickness of 3 μm on the surface of the aluminum foil to form a conductive coating; rolling the above solid mixture vertically and horizontally at 30°C to obtain a dry carbon film, and pasting the conductive coating, After curing at 150°C for 4h, supercapacitor electrodes were obtained.

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Abstract

The invention relates to the technical field of supercapacitor preparation, in particular to a preparation process of a supercapacitor electrode, and creatively proposes that the mixing temperature is reduced, the stability of a PTFE spiral structure is enhanced, fibration of PTFE is effectively inhibited, the agglomeration phenomenon is avoided, by coordinating the mixing temperature and the stirring rotating speed, the uniformity and dispersity of a solid mixture are remarkably improved, and the prepared dry carbon film is high in mechanical strength, small in internal resistance, high in power density and good in cycle performance. The preparation process is simple to operate, convenient to control, high in production efficiency and low in production cost, and can be used for large-scale production.

Description

technical field [0001] The invention relates to the technical field of supercapacitor preparation, in particular to a preparation process of supercapacitor electrodes. Background technique [0002] As a new type of high-efficiency electrochemical energy storage device, supercapacitors have improved energy density by several orders of magnitude compared with traditional capacitors, and have outstanding advantages, such as fast charge and discharge rates, wide operating temperature range, and long cycle life. It makes up for the shortcomings of traditional energy storage devices. Supercapacitors involve multiple disciplines such as materials, energy, chemistry, and electrical devices, and have been successfully widely used in urban public transportation, wind power generation, heavy machinery, consumer electronics, and military industries, and have become a new type of national strategic significance. high tech industry. [0003] At present, the supercapacitor electrode prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86
CPCH01G11/86Y02E60/13
Inventor 王波孙世超王秋君李文张迪李昭进孙会兰
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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