A kind of electrode and preparation method thereof

An electrode and electromagnetic technology, applied in the field of electrodes for supercapacitors and their preparation, can solve the problems of uncontrollable fibrillation direction of mixed dry powder, large amount of binder, and large material loss, so as to achieve short heating time and avoid material loss. , the effect of reducing the dosage

Active Publication Date: 2022-01-14
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Aiming at the problems in the existing dry electrode process such as the use of air jet grinding mixed dry powder during the material-gas separation process, the loss of material, the uncontrollable direction of fiberization of the mixed dry powder, and the large amount of binder used, etc., to provide a material-free Fiberization method with controllable loss and fiberization direction and less binder consumption;
[0009] (2) Aiming at the problem of low bonding strength of self-supporting dry film and current collector in the existing dry electrode process, a self-supporting dry film and current collector composite method with high bonding strength is provided

Method used

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  • A kind of electrode and preparation method thereof
  • A kind of electrode and preparation method thereof
  • A kind of electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] S1, take by weighing 950g activated carbon powder, 20g acetylene black and 30g polytetrafluoroethylene powder and add in double-cone rotary vacuum mixer and mix evenly, obtain 1000g mixed dry powder;

[0065] S2. Use a conduit with a length of 1m and an inner diameter of 1cm to connect the double-cone rotary vacuum mixer and the receiving barrel from top to bottom. After turning on the switch of the conduit, use a high-energy electromagnetic shock wave generator to focus and impact the free-falling mixed dry powder in the conduit. The impact energy is set. It is set at 6MPa, the impact frequency is set at 25Hz, and the impact area is set at 0.785cm 2 , until all the mixed dry powder in the double-cone rotary vacuum mixer falls freely through the conduit to the receiving barrel below, and 1000g of fibrous mixed dry powder is obtained;

[0066] S3. Using a vibrating blanking powder spreader, the fibrous mixed dry powder obtained in S2 is quantitatively dropped to the cent...

Embodiment 2

[0069] S1, take by weighing 930g activated carbon powder, 20g acetylene black and 50g polytetrafluoroethylene powder and add in double-cone rotary vacuum mixer and mix evenly, obtain 1000g mixed dry powder;

[0070] S2. Use a conduit with a length of 1m and an inner diameter of 1cm to connect the double-cone rotary vacuum mixer and the receiving barrel from top to bottom. After turning on the switch of the conduit, use a high-energy electromagnetic shock wave generator to focus and impact the free-falling mixed dry powder in the conduit. The impact energy is set. It is set at 6MPa, the impact frequency is set at 25Hz, and the impact area is set at 0.785cm 2 , until all the mixed dry powder in the double-cone rotary vacuum mixer falls freely through the conduit to the receiving barrel below, and 1000g of fibrous mixed dry powder is obtained;

[0071] S3. Using a vibrating blanking powder spreader, the fibrous mixed dry powder obtained in S2 is quantitatively dropped to the cent...

Embodiment 3

[0074] S1, take by weighing 930g activated carbon powder, 20g acetylene black and 50g polytetrafluoroethylene powder and add in double-cone rotary vacuum mixer and mix evenly, obtain 1000g mixed dry powder;

[0075] S2. Use a conduit with a length of 1m and an inner diameter of 1cm to connect the double-cone rotary vacuum mixer and the receiving barrel from top to bottom. After turning on the switch of the conduit, use a high-energy electromagnetic shock wave generator to focus and impact the free-falling mixed dry powder in the conduit. The impact energy is set. It is set at 8MPa, the impact frequency is set at 32Hz, and the impact area is set at 0.785cm 2 , until all the mixed dry powder in the double-cone rotary vacuum mixer falls freely through the conduit to the receiving barrel below, and 1000g of fibrous mixed dry powder is obtained;

[0076] S3. Using a vibrating blanking powder spreader, the fibrous mixed dry powder obtained in S2 is quantitatively dropped to the cent...

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Abstract

The invention relates to an electrode for a supercapacitor and a preparation method thereof. The preparation method comprises: S1, uniformly dry-mixing an active material, a conductive agent and a binder to obtain a mixed dry powder; S2, shocking the above-mentioned mixed dry powder with an electromagnetic shock wave, Obtaining the fibrous mixed dry powder; S3, calendering the above-mentioned fibrous mixed dry powder to form a self-supporting dry film; S4, heating the current collector with a high-frequency electromagnetic induction device, and compounding the above-mentioned self-supporting dry film on the current collector to obtain the electrode . When the electrode obtained by using the preparation method is applied to a supercapacitor, the initial capacity, DC internal resistance and high-temperature load performance of the supercapacitor are significantly improved.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to an electrode for a supercapacitor and a preparation method thereof. Background technique [0002] Electric double-layer supercapacitors consist of electrodes, separators, electrolytes, and casings, and store energy by forming an electric double layer at the interface between the electrodes and the electrolyte. Among them, the electrode is the core component of the supercapacitor. For supercapacitors with carbon materials as the active material, the electrode preparation process usually requires the use of binders to bond the active material and conductive agent to the current collector. According to whether the solvent that wets the binder, active material and conductive agent is introduced during the mixing process of electrode preparation, the preparation process of electrodes for supercapacitors can be divided into two types: wet method and dry method. [0003] The w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/22
CPCH01G11/22H01G11/86Y02E60/13
Inventor 郭义敏郭德超张啟文龙超慈祥云韩莉珺何凤荣
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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