CN101950683B - Preparation method of semi-spherical active carbon electrode material of super capacitor - Google Patents

Preparation method of semi-spherical active carbon electrode material of super capacitor Download PDF

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Publication number
CN101950683B
CN101950683B CN2010102772380A CN201010277238A CN101950683B CN 101950683 B CN101950683 B CN 101950683B CN 2010102772380 A CN2010102772380 A CN 2010102772380A CN 201010277238 A CN201010277238 A CN 201010277238A CN 101950683 B CN101950683 B CN 101950683B
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active carbon
semi
preparation
electrode material
glucose
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CN101950683A (en
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邓梅根
陈英放
冯义红
方勤
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Jiangxi University of Finance and Economics
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Jiangxi University of Finance and Economics
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

Abstract

The invention relates to a preparation method of a semi-spherical active carbon electrode material of a super capacitor, which comprises the steps of: 1, dissolving glucose into deionized water, adding a foaming agent, after completely dissolving and fully mixing, transferring to a high-pressure kettle, and hydrothermally reacting at a temperature of 90-160 DEG C for 5-9h, wherein the mass ratio of the glucose to the foaming agent is 10:1-5; and washing a product, filtering and drying for carbonizing at a temperature of 700-850 DEG C for 3-5h under the protection of a reducing atmosphere, naturally cooling and then grinding to obtain semi-spherical active carbon. The invention has the advantages of simple steps, mild reaction conditions, increased pore diameter of the semi-spherical active carbon material, improved migration property of electrolyte ions and capability of effectively improving the power density of the super capacitor.

Description

The preparation method of the hemispherical active carbon electrode material of ultracapacitor
Technical field
The present invention relates to a kind of preparation method of electrode material, relate in particular to the preparation method of the hemispherical active carbon electrode material of a kind of ultracapacitor.
Background technology
Ultracapacitor is a kind of novel energy-storing element between battery and traditional capacitor, characteristics such as have big capacity, high power density and have extended cycle life.All have a wide range of applications in fields such as electric automobile, consumer electronics, electricity power, communications and transportation and Aero-Space.
Absorbent charcoal material is the core material of carbon back ultracapacitor.Its energy storage mechanism is in the electric double layer that between electrode and electrolyte interface, forms of Charge Storage, relies on the electrostatic charge storage power.Active carbon mainly is its porosity characteristic as the capacitor electrode material foundation, and structure of activated carbon comprises macropore, mesopore and microcellular structure.Owing to the restriction in aperture, electrolyte diffusion and electrolytical migration rate are not high in mesopore and microcellular structure, and the power that discharges and recharges that therefore can limit ultracapacitor is power density.For a lot of applications, requirement can be accomplished the super-large current fast charging and discharging moment, and in this case, existing absorbent charcoal material also is difficult to satisfy this requirement.
Summary of the invention
The object of the present invention is to provide the preparation method of the hemispherical active carbon electrode material of a kind of ultracapacitor, this hemispherical active carbon electrode material can effectively improve the power density of ultracapacitor.
The present invention realizes like this, it is characterized in that method step is: earlier glucose is dissolved in the deionized water, adds blowing agent again; The mass ratio of glucose and blowing agent is 10: 1-5, treat whole dissolvings, fully be transferred in the autoclave after the mixing, reaction under 90-160 ℃ of hydrothermal condition; Reaction time is 5-9h, with product washing, filter, dry back under protection of reducing atmosphere 700-850 ℃ carry out carbonization, carbonization time 3-5h; Naturally grind cooling cooling back, obtains hemispherical active carbon.
Said blowing agent is lauryl sodium sulfate, sodium acid carbonate or sodium sulfate of polyethenoxy ether of fatty alcohol.
Advantage of the present invention is: method step is simple, and reaction condition is gentle, and the migration performance of electrolyte ion is improved in the aperture that increases hemispherical absorbent charcoal material, can effectively improve the power density of ultracapacitor.
Description of drawings
Fig. 1 is the hemispherical active carbon SEM of embodiment 1 a gained photo.
Fig. 2 for the hemispherical activated carbon electrodes of embodiment 1 gained sweep speed be 100 with 50mv/s under cyclic voltammetry curve.
Fig. 3 is 10,20 and 50mA/cm for the hemispherical activated carbon electrodes of embodiment 1 gained in current density 2Under the constant current charge-discharge curve.
Fig. 4 is the hemispherical activated carbon electrodes cyclic voltammetric of embodiment 2 a gained test curve.
Fig. 5 is the hemispherical activated carbon electrodes charging and discharging curves of embodiment 2 gained.
Embodiment
Embodiment 1
The preparation of hemispherical active carbon: earlier 10 glucose are dissolved in the deionized water, add blowing agent lauryl sodium sulfate 1g again, treat all to be transferred in the autoclave after the dissolving, reaction 7h under 100 ℃ of hydrothermal conditions.With product washing, filtration, dry back in the following 700 ℃ of carbonization 3h of protection of reducing atmosphere.Naturally grind cooling cooling back, obtains hemispherical active carbon.Fig. 1 is the SEM photo of this sample, as can be seen from Figure 1 tangible hemispherical structure.The hemispherical active carbon specific area that this method is prepared is 911.21m 2/ g.
The preparation of activated carbon electrodes: it is even that active carbon, carbon black and ptfe emulsion are pressed 65: 30: 5 mixed of mass ratio; The furnishing pulpous state; And evenly be coated on the nickel foam; With 15MPa pressure tablet forming, again electrode slice is put into 120 ℃ of vacuum drying chamber vacuumizes 24 hours with powder compressing machine.With the saturated calomel electrode is reference electrode, is to electrode with 2 * 2cm platinized platinum electrode, and electrolyte is 2M KOH solution, carries out the cyclic voltammetric and the constant current charge-discharge characteristic test of activated carbon electrodes at German IM6ex electrochemical workstation.As can beappreciated from fig. 2, cyclic voltammetric this sample of when test is in the scope interscan of voltage-0.9~0.5V, and demonstrates reasonable rectangle, and when sweep speed was 100mv/s, the speed of response of electrode was very fast.Fig. 3 is the discharge curve of this electrode under the different electric current density, with 100mA/cm 2During the constant current charge-discharge test, the specific volume of sample reaches 287.89F/g.
Embodiment 2
The preparation of hemispherical active carbon: earlier glucose is dissolved in the deionized water, adds blowing agent sodium acid carbonate 1g again, treat all to be transferred in the autoclave after the dissolving, reaction 9h under 160 ℃ of hydrothermal conditions.With product washing, filtration, dry back in the following 850 ℃ of carbonization 3h of protection of reducing atmosphere.Naturally grind cooling cooling back, obtains hemispherical active carbon.The hemispherical active carbon specific area that this method is prepared is 851.75m 2/ g.
The preparation of activated carbon electrodes: it is even that active carbon, carbon black and ptfe emulsion are pressed 65: 30: 5 mixed of mass ratio; The furnishing pulpous state; And evenly be coated on the nickel foam; With 15MPa pressure tablet forming, again electrode slice is put into 120 ℃ of vacuum drying chamber vacuumizes 24 hours with powder compressing machine.With the saturated calomel electrode is reference electrode, is to electrode with 2 * 2cm platinized platinum electrode, and electrolyte is 2M KOH solution, carries out the cyclic voltammetric and the constant current charge-discharge characteristic test of activated carbon electrodes at German IM6ex electrochemical workstation.This sample is under the sweep speed of 50mV/s, and cyclic voltammetry curve is as shown in Figure 4, and the power response characteristic of electrode is relatively good.Fig. 5 is this sample electrode constant current charge-discharge test curve, demonstrates relatively good voltage response curves.Electric current is 20mA/cm 2The time, specific volume reaches 267.83F/g.

Claims (1)

1. the preparation method of the hemispherical active carbon electrode material of ultracapacitor is characterized in that method step is: earlier glucose is dissolved in the deionized water, adds blowing agent again; The mass ratio of glucose and blowing agent is 10: 1-10: 5, and treat whole dissolvings, fully be transferred in the autoclave after the mixing, reaction under 90-160 ℃ of hydrothermal condition; Reaction time is 5-9h; With product washing, filter, dry back under protection of reducing atmosphere 700-850 ℃ carry out carbonization, carbonization time 3-5h, the grinding of cooling cooling back naturally; Obtain hemispherical active carbon, described blowing agent is lauryl sodium sulfate, sodium acid carbonate or sodium sulfate of polyethenoxy ether of fatty alcohol.
CN2010102772380A 2010-09-09 2010-09-09 Preparation method of semi-spherical active carbon electrode material of super capacitor Expired - Fee Related CN101950683B (en)

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CN105000544A (en) * 2015-06-24 2015-10-28 奇瑞汽车股份有限公司 Preparation method for high-conductivity porous carbon material used for supercapacitor
CN109887763B (en) * 2019-01-24 2021-02-05 暨南大学 Multiple micro-nano structure carbon material with conductive energy storage function and preparation method thereof
CN112374496B (en) * 2020-11-20 2022-05-24 嘉兴学院 Preparation method of biomass porous carbon material based on iodine simple substance pore-forming agent and electrochemical energy storage application of biomass porous carbon material

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CN1872674A (en) * 2006-06-09 2006-12-06 江西财经大学 Method for preparing active mesopore carbon with high specific surface area in use for electrochemical capacitor
CN101299397A (en) * 2008-03-21 2008-11-05 中国科学院上海硅酸盐研究所 Stephanoporate carbon electrode material and preparation method thereof
CN101525132A (en) * 2009-04-15 2009-09-09 广西师范大学 Active carbon for super capacitor and a preparation method thereof
CN101531358A (en) * 2009-04-28 2009-09-16 湖南理工学院 Method for preparing porous carbon electrode material used for super capacitor

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CA2270771A1 (en) * 1999-04-30 2000-10-30 Hydro-Quebec New electrode materials with high surface conductivity
WO2007114849A2 (en) * 2005-11-04 2007-10-11 Meadwestvaco Corporation Activated carbon from carbohydrate
KR20080043623A (en) * 2006-11-14 2008-05-19 재단법인 포항산업과학연구원 Preparation method of meso porous activated carbon for supercapacitor electrode

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CN1872674A (en) * 2006-06-09 2006-12-06 江西财经大学 Method for preparing active mesopore carbon with high specific surface area in use for electrochemical capacitor
CN101299397A (en) * 2008-03-21 2008-11-05 中国科学院上海硅酸盐研究所 Stephanoporate carbon electrode material and preparation method thereof
CN101525132A (en) * 2009-04-15 2009-09-09 广西师范大学 Active carbon for super capacitor and a preparation method thereof
CN101531358A (en) * 2009-04-28 2009-09-16 湖南理工学院 Method for preparing porous carbon electrode material used for super capacitor

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