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Method for preparing double-electric-layer capacitor

An electric double-layer capacitor and electrode technology, which is applied in the field of super-capacity electric double-layer capacitor preparation, can solve problems such as affecting capacitor performance, wide pore size distribution, affecting service life, etc., and achieves improved microstructure and performance, high charge and discharge speed, The effect of large specific capacitance

Inactive Publication Date: 2012-04-25
韦华鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the capacitor electrodes prepared by the existing methods generally have the disadvantages of wide pore size distribution and low microporosity, which affect the performance of the capacitor and cannot give full play to the fast charging and discharging characteristics of the electric double layer capacitor. Performance loss, affecting service life

Method used

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  • Method for preparing double-electric-layer capacitor

Examples

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Effect test

Embodiment 1

[0032] Take 100g petroleum coke, use 200gKOH, 5gCa(OH) 2 The solid mixture is used as a compound activator. After mixing, it is pre-activated in a low-temperature activation furnace for about 2 hours under nitrogen protection. The activation temperature is 200°C. The material is then transferred to a high-temperature activation furnace and activated at 750°C for about 1 hour. After activation, the material is taken out. And washed with water to neutral (PH=7), then soaked in dilute hydrochloric acid with a concentration of 0.014mol / L for about 30 minutes, and finally dried at 100°C and 0.092MPa vacuum for 2 hours to obtain powder activated carbon.

[0033] Take 2g of graphite and 5g of polytetrafluoroethylene and add it to the above-mentioned powdered activated carbon, press it with a 50-mesh stainless steel mesh at 80MPa and 150°C to make it 0.5mm thick and 5cm in area. 3 1 activated carbon electrode. The stainless steel mesh is pressed in the middle of the carbon electrode ...

Embodiment 2

[0036] Take 100g petroleum coke powder, use 300gKOH, 10gCa(OH) 2 , 5gZnCL 2The solid mixture is used as a complex activator. After mixing, activate in a low-temperature activation furnace for 2.5 hours at a temperature of 150°C, then transfer to a high-temperature activation furnace and activate at 800°C for 0.5 hours. Soak in L dilute hydrochloric acid for about 30 minutes, and finally dry at 120°C and 0.092MPa vacuum for 2 hours to obtain powdered activated carbon.

[0037] Add 15g of carbon black and 60g of coal tar to the above-mentioned powdered activated carbon, and press it with 200-mesh stainless steel mesh at 100MPa and 140°C to make it 0.4mm thick and 6cm in area. 3 1 activated carbon electrode. The stainless steel mesh is pressed in the middle of the carbon electrode and integrated with the electrode. The other electrode is pressed on a stainless steel mesh with one of ruthenium oxide, manganese oxide, and nickel oxide, and cut into a sheet with a thickness of a...

Embodiment 3

[0040] Take 100g lignin, use 300gKOH, 2g Ca(OH) 2 , 10g MaOH solid mixture as composite activator. After mixing, put it in the low-temperature activation furnace for about 1.5 hours, the activation temperature is 550°C, then transfer to the high-temperature activation furnace, and activate it at 700°C for about 1 hour. After activation, the material is taken out and washed with water until neutral, then soaked in 0.01 mol / L dilute hydrochloric acid for 30 minutes, and finally dried at 100°C and 0.092MPa vacuum for 2 hours to obtain powdered activated carbon.

[0041] Add 15g of polyaniline (PAn) and 60g of polytetrafluoroethylene (PTFE) into the above-mentioned powdered activated carbon, press it with 200 mesh stainless steel mesh in the middle of the carbon at 90MPa and 140°C, and integrate with the electrode.

[0042] Put the two above-mentioned activated carbon electrodes into 5wt% KOH aqueous solution, and add a separator in the middle to form an electric double layer cap...

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Abstract

The invention relates to a method for preparing a double-electric-layer capacitor. The traditional double-electric-layer capacitor can not fully develop the characteristic of rapid electricity charge and discharge of the double-electric-layer capacitor. The method provided by the invention comprises the following steps: firstly mixing raw materials and an activator, fusing and reacting in a low-temperature reacting furnace, then reacting in a high-temperature reacting furnace, and carrying out rinsing, acid washing and vacuum drying on carbon materials after high-temperature reaction, thereby preparing powder activated carbon; then respectively mixing one of the powder activated carbon, RuOx, manganese oxide and nickel oxide with an additive and a bonding agent, and pressing and molding together with current collectors, thus obtaining a double-electric-layer electrode; and finally putting one of RuOx, manganese oxide and nickel oxide electrodes and an activated carbon electrode into a container with electrolyte, thus obtaining the double-electric-layer capacitor. The electrode of the capacitor provided by the invention has higher specific surface area and microporosity. The capacitor prepared by the invention has higher electricity charge and discharge speed on the basis of higher specific capacitance.

Description

technical field [0001] The invention relates to a method for preparing a capacitor, in particular to a method for preparing a super-large-capacity electric double-layer capacitor. Background technique [0002] With the development of the economy, the demand for electric energy is increasing year by year, and the utilization of electricity has penetrated into all fields of people, especially in the mobile area, the rapid growth of electricity has led to the rapid development of electric storage components. At present, the most widely used and deeply researched components are mainly concentrated on capacitors. [0003] Electric double layer capacitors store charges through the electric double layer generated at the electrode / solution interface by electrostatic attraction. Since the distance between the two parallel electrode plates in contact with the interface is similar to the molecular diameter, it is also called a differential capacitor. Its electrostatic capacity is 10 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G9/155H01G11/86
CPCH01G11/34Y02E60/13
Inventor 韦华鹏
Owner 韦华鹏
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