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Electrode and manufacturing method thereof

A technology of electrodes and conductive agents, applied in the field of electrodes and their preparation, can solve the problems of poor electrochemical stability of electrodes, achieve the effects of improving electrochemical stability, high flexibility, and increasing yield

Active Publication Date: 2016-10-19
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor electrochemical stability of existing electrodes, an embodiment of the present invention discloses an electrode and a preparation method thereof

Method used

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  • Electrode and manufacturing method thereof
  • Electrode and manufacturing method thereof

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preparation example Construction

[0042] Another aspect of the present invention provides a preparation method for the above electrode, the preparation method may include:

[0043] Mixing carbon materials, conductive agents, fiber binders, fiber activators and air getters to obtain a mixture;

[0044] Humidify the mixture;

[0045] Kneading the mixed material after the humidification treatment to obtain the kneaded material;

[0046] After the kneaded material is dried and pulverized, it is subjected to molding treatment to obtain a self-supporting film;

[0047] The self-supporting film is thermally laminated with the surface pretreated metal current collector to obtain the electrode.

[0048] Wherein, the mixing can use a V-type mixer or a planetary mixer to mix the above-mentioned materials uniformly.

[0049] The above-mentioned mixing material is carried out humidification treatment, can comprise: adding water and / or C to the mixing material 1–4 alcohol, and stir evenly; among them, the added water and / ...

Embodiment 1

[0065] 1) 8 kg of activated carbon (Kuraray Company, YP50 brand), 1.1 kg of conductive carbon black (Te Mi Gao Company, Superp

[0066] brand), PVDF (polyvinylidene fluoride) 0.5kg (Solvay, solef 5130 brand), fiber activator

[0067] 0.3kg (Total Corporation, 25110 grade), air getter 0.1kg (Saith Corporation, SuiSorb grade) added to

[0068] In a planetary mixer, mix for 30 minutes to obtain a mixture.

[0069] 2) Add 7kg of deionized water to the mixture, and stir evenly for 1 hour.

[0070] 3) Add 0.5kg of isopropanol to the mixture, continue to stir for 30 minutes, the mixture becomes dough, keep stirring for 1 hour at this time, fully knead the mixture, fiberize the fiber binder, and obtain the kneaded mixture.

[0071] 4) Put the kneaded material into a drying oven at 120° C. for 3 hours to remove moisture and isopropanol.

[0072] 5) Put the dried kneaded material into a ball mill and pulverize it to obtain Kneaded Material 1 with a particle size of 12 μm.

[0073] 6...

Embodiment 2

[0077] 1) 7kg of activated carbon (among them, 3.5kg of active carbon of YP50 brand from Kuraray Company, 3.5kg of activated carbon of CEP21KS brand from PCT Company), 0.7kg of carbon nanotubes (Tiannai Company, LB200 brand), PVDF (poly Vinylidene fluoride) 1.6kg (Solvay company, solef 5130 brand), fiber activator 0.3kg (Total company, 25110 brand), air getter 0.1kg (Saisi company, SuiSorb brand) were added in the planetary mixer, mixed After 30 minutes, a mixture was obtained.

[0078] 2) Add 5kg of deionized water to the mixture, and stir evenly for 1 hour.

[0079] 3) Add 0.3kg of isopropanol to the mixture, continue to stir for 30 minutes, the mixture becomes dough, keep stirring for 1 hour at this time, fully knead the mixture, fiberize the fiber binder, and obtain the kneaded mixture.

[0080] 4) Put the kneaded material into a drying oven at 100° C. for 5 hours to remove moisture and isopropanol.

[0081] 5) The dried kneaded material was pulverized in a ball mill to ...

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Abstract

Embodiments of the invention disclose an electrode and a manufacturing method thereof. The electrode comprises a self-supporting film and a metal current collector with a pretreatment surface. The self-supporting film comprises a carbon material, a conductive agent, a fiber binder, a fiber activator and a getter. In the technical scheme of the invention, the fiber binder and the fiber activator are cooperatively added in the electrode so as to replace a butadiene styrene rubber in the prior art. On one hand, because electrochemical stability of the fiber binder is better than that of the butadiene styrene rubber, electrochemical stability of the electrode can be increased and then a service life of a capacitor is prolonged; on the other hand, because the fiber binder becomes an elastomer after fibration, a fiber is elongated under an effect of a pulling force and is recovered after the pulling force disappears. The electrode provided in the invention possesses high flexibility and does not generate a fracture phenomenon during a bending process. During charge and discharge processes of a super capacitor assembled by the electrode, size deformation of the electrode which expands does not generate any damage.

Description

technical field [0001] The invention relates to an electrode and a preparation method thereof. Background technique [0002] With the advancement of science and technology, more and more portable smart devices have entered human life, and all kinds of smart devices are inseparable from energy storage devices. Energy storage devices have gradually developed from primary batteries to secondary batteries that can be recharged and utilized. Since the 1990s, a new energy storage device-supercapacitor has gradually entered some special fields. Compared with secondary batteries, supercapacitors have the characteristics of fast charging and discharging, long life, and high power density. Therefore, in There are more and more applications in some fields with special needs. [0003] The electrode is the core component of the supercapacitor, and its performance determines more than 80% of the performance of the supercapacitor. Therefore, both at home and abroad are sparing no effort...

Claims

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Application Information

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IPC IPC(8): H01G11/38H01G11/86
Inventor 陈胜军
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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