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Graphite microcrystalline carbon for preparing electrochemical capacitor by using microwave-assisted method

A graphite microcrystalline and microwave-assisted technology is applied in the field of preparation of new graphite microcrystalline carbon, which can solve the problems of harsh equipment requirements and long time consumption, and achieve the effect of avoiding harsh requirements.

Inactive Publication Date: 2012-11-07
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of high temperature, long time consumption and harsh equipment requirements in the prior art, and provide a short time-consuming, microwave-assisted method for preparing graphite microcrystalline carbon for electrochemical capacitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Microwave carbonized AR resin

[0020] Take 5 g of dry AR resin with a particle size of <120 μm, and treat it with 640W microwave carbonization for 6 minutes in a microwave reactor container.

[0021] 2. Weakly activated AR resin

[0022] Grind or ball mill the AR resin after microwave carbonization in step 1 to a particle size of <200 μm, mix it with potassium hydroxide at a mass ratio of 1:1.0, place it in a microwave reactor container, and activate it with 640W microwave for 2 minutes.

[0023] 3. Wash and dry

[0024] Take out the weakly activated AR resin in step 2, wash it with deionized water until it is neutral, put it into a vacuum oven with a vacuum degree of -0.08MPa and dry it at 120°C for 12 hours to prepare graphite microcrystalline carbon.

[0025] Prepared graphite microcrystalline carbon detects its capacitance performance by the following method:

[0026] (1) Preparation of electrode sheets

[0027] Grinding the prepared graphite microcrystallin...

Embodiment 2

[0037] In step 1 of the microwave carbonization of AR resin in this embodiment, 5 g of dry AR resin with a particle size of 3 .

Embodiment 3

[0039] In step 1 of the microwave carbonization of AR resin in this embodiment, 5 g of dry AR resin with a particle size of 3 .

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PUM

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Abstract

The invention discloses graphite microcrystalline carbon for preparing an electrochemical capacitor by using a microwave-assisted extraction method, comprising the following steps of: with AR (Araldite) resin as a raw material and strong base as an activating agent, under the action of microwave radiation, carbonizing and activating the AR resin by adjusting and controlling the time-rise speed and the reaction time, further activating an electric filed in the first charging process and preparing high-energy density graphite microcrystalline carbon in a short time. Compared with the traditional method, the invention avoids the defects of high temperature, long consumed time and high requirements for the equipment, and the like in the prior art. The microwave-assisted extraction method has the characteristics of simpleness, convenience, quickness, and short time; and the products prepared by the microwave-assisted extraction method have similar performances compared with the products prepared by the conventional preparation method.

Description

technical field [0001] The invention belongs to the technical field of electrode carbon materials for electrochemical capacitors, and in particular relates to a preparation method of novel graphite microcrystalline carbon for improving the energy density of electrochemical capacitors. Background technique [0002] With the increasing shortage of resources and energy and the deterioration of the ecological environment, which is a global problem, more and more people pay attention to hybrid electric vehicles (HEV). In this environment-friendly and economical HEV, the rechargeable battery is generally used as an auxiliary power supply for the starting system, which quickly discharges a large current when the electric vehicle starts and climbs a hill; or is used for the braking system, which is quickly stored when braking. The instantaneous high current generated by the generator. This requires energy storage devices with high energy density and power density to meet the applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 刘春玲董文生石美荣李孟元王燕
Owner SHAANXI NORMAL UNIV