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A low internal resistance supercapacitor cell and its preparation process

A technology of supercapacitor and preparation process, which is applied in the fields of hybrid capacitor current collector, hybrid/electric double-layer capacitor manufacturing, electrolytic capacitor, etc. The effect of improving performance

Active Publication Date: 2020-08-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the low internal resistance supercapacitor obtains a cell structure similar to a laminated supercapacitor through a winding process to overcome the high internal resistance of supercapacitors manufactured by the traditional winding process, and the lamination process can obtain low internal resistance. However, the disadvantage of the battery cell is that the process is complicated, and the advantages of fast and easy control of the winding process can be used to manufacture supercapacitor cells with low internal resistance and laminated structure

Method used

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  • A low internal resistance supercapacitor cell and its preparation process
  • A low internal resistance supercapacitor cell and its preparation process
  • A low internal resistance supercapacitor cell and its preparation process

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Take 90kg of capacitor carbon, 7kg of conductive carbon black and 3kg of PTFE and mix them evenly. After multiple times of kneading, the above-mentioned mixing and pressing are made into a carbon film; then the carbon film is pressed on the aluminum foil current collector coated with conductive glue in advance, and the entire electrode sheet The width is 200mm, and a blank area of ​​10mm is left on the edge of the aluminum foil (non-capacitive carbon, conductive carbon black and PTFE substances);

[0036] (2) Put the completed electrode sheet into a roller press and press it under a pressure of 50MPa to obtain a pressed electrode sheet with an electrode density of 0.7g / cm 3 ;

[0037] (3) Cut the pressed electrode piece longitudinally from the middle, divide it into two parts, and use it as two pole pieces of a supercapacitor (such as figure 1 );

[0038] (4) cutting the electrode sheet into a length of 500 mm to obtain an electrode sheet for the winding process; ...

Embodiment 2

[0044] (1) Take 90kg of capacitor carbon, 7kg of conductive carbon black and 3kg of PTFE and mix them evenly. After multiple times of kneading, the above-mentioned mixing and pressing are made into a carbon film; then the carbon film is pressed on the aluminum foil current collector coated with conductive glue in advance, and the entire electrode sheet The width is 150mm, and a blank area of ​​15mm is left on the edge of the aluminum foil (non-capacitor carbon, conductive carbon black and PTFE substances);

[0045] (2) Put the completed electrode sheet into a roller press and press it under a pressure of 30MPa to obtain a pressed electrode sheet with an electrode density of 0.5g / cm 3 ;

[0046] (3) Cut the pressed electrode piece longitudinally from the middle, divide it into two parts, and use it as two pole pieces of a supercapacitor (such as figure 1 );

[0047] (4) cutting the electrode sheet into a length of 1000 mm to obtain an electrode sheet for the winding process; ...

Embodiment 3

[0053] (1) Take 90kg of capacitor carbon, 7kg of conductive carbon black and 3kg of PTFE and mix them evenly. After multiple times of kneading, the above-mentioned mixing and pressing are made into a carbon film; then the carbon film is pressed on the aluminum foil current collector coated with conductive glue in advance, and the entire electrode sheet The width is 300mm, and a blank area of ​​23mm is left on the edge of the aluminum foil (non-capacitive carbon, conductive carbon black and PTFE substances);

[0054] (2) Put the completed electrode sheet into a roller press and press it under a pressure of 50MPa to obtain a pressed electrode sheet with an electrode density of 0.6g / cm 3 ;

[0055] (3) Cut the pressed electrode piece longitudinally from the middle, divide it into two parts, and use it as two pole pieces of a supercapacitor (such as figure 1 );

[0056] (4) cutting the electrode sheet into a length of 2000mm to obtain an electrode sheet for the winding process; ...

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Abstract

The invention discloses a preparation technology for a low-internal-resistance supercapacitor core, and the supercapacitor core is formed by the winding of electrodes and a membrane. The electrode ateach layer serves as a current lead wire through a blank aluminum foil current collector, and is connected with a lug. The electrodes at all layers are of a parallel structure. Meanwhile, a low-internal-resistance supercapacitor is processed through the winding technology, so as to obtain a core structure similar to a stacked-type supercapacitor, and to iron out the defects that a supercapactor prepared through a conventional winding technology is high in internal resistance and a low-internal-resistance supercapacitor obtained through the stacking technology is complex in technology. The winding technology which is quick and easy to control can be used for manufacturing the low-internal-resistance supercapacitor of a stacked structure.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and in particular relates to a low internal resistance supercapacitor cell and a preparation process. Background technique [0002] Supercapacitors have high power performance and can realize instantaneous charge and discharge, and are widely used in fields such as instantaneous power start, energy recovery, smart grid, and new energy power generation. At the same time, compared with commonly used batteries, supercapacitors also have the advantages of long life, high safety and low temperature resistance, and have very broad application prospects. [0003] The fast charge and discharge performance of a supercapacitor is closely related to its internal resistance. Only a very low internal resistance can ensure that the supercapacitor can quickly absorb and release electric energy without generating a lot of heat. In addition to factors such as electrode materials and electrolytes, the internal stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/70H01G11/74H01G11/84
CPCH01G11/70H01G11/74H01G11/84Y02E60/13
Inventor 陈成猛席作为苏方远张建平白锦宇樊伟王剑飞
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI