CN101950683A - 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 PDFInfo
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- CN101950683A CN101950683A CN 201010277238 CN201010277238A CN101950683A CN 101950683 A CN101950683 A CN 101950683A CN 201010277238 CN201010277238 CN 201010277238 CN 201010277238 A CN201010277238 A CN 201010277238A CN 101950683 A CN101950683 A CN 101950683A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/13—Energy storage using capacitors
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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
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 forms between electrode and electrolyte interface 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 finished 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 is achieved like this; it is characterized in that method step is: earlier glucose is dissolved in the deionized water; add 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; under 90-160 ℃ of hydrothermal condition, react; 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.
Described 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, the reaction condition gentleness, 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 and 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, under 100 ℃ of hydrothermal conditions, react 7h.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 be seen from Figure 2, cyclic voltammetric this sample of when test is in the scope interscan of voltage-0.9～0.5V, and presents 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 different current densities, 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, under 160 ℃ of hydrothermal conditions, react 9h.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 under the sweep speed of 50mV/s, cyclic voltammetry curve as shown in Figure 4, the power response characteristic of electrode is relatively good.Fig. 5 is this sample electrode constant current charge-discharge test curve, presents relatively good voltage response curves.Electric current is 20mA/cm
2The time, specific volume reaches 267.83F/g.
Claims (2)
1. the preparation method of the hemispherical active carbon electrode material of ultracapacitor; it is characterized in that method step is: earlier glucose is dissolved in the deionized water; add 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; under 90-160 ℃ of hydrothermal condition, react; 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.
2. the preparation method of the hemispherical active carbon electrode material of ultracapacitor according to claim 1 is characterized in that blowing agent is lauryl sodium sulfate, sodium acid carbonate or sodium sulfate of polyethenoxy ether of fatty alcohol.
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| CN2010102772380A CN101950683B (en) | 2010-09-09 | 2010-09-09 | Preparation method of semi-spherical active carbon electrode material of super capacitor |
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| CN2010102772380A CN101950683B (en) | 2010-09-09 | 2010-09-09 | Preparation method of semi-spherical active carbon electrode material of super capacitor |
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| CN101950683A true CN101950683A (en) | 2011-01-19 |
| CN101950683B CN101950683B (en) | 2012-07-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109887763A (en) * | 2019-01-24 | 2019-06-14 | 暨南大学 | A kind of multiple micro nano structure carbon material and preparation method having conductive energy storage effect |
| CN112374496A (en) * | 2020-11-20 | 2021-02-19 | 嘉兴学院 | Preparation method of biomass porous carbon material based on novel iodine simple substance pore-forming agent and electrochemical energy storage application of biomass porous carbon material |
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2010
- 2010-09-09 CN CN2010102772380A patent/CN101950683B/en not_active Expired - Fee Related
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| US20080257721A1 (en) * | 1999-04-30 | 2008-10-23 | Acep, Inc. | Electrode materials with high surface conductivity |
| WO2007114849A2 (en) * | 2005-11-04 | 2007-10-11 | Meadwestvaco Corporation | Activated carbon from carbohydrate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109887763A (en) * | 2019-01-24 | 2019-06-14 | 暨南大学 | A kind of multiple micro nano structure carbon material and preparation method having conductive energy storage effect |
| 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 |
| CN112374496A (en) * | 2020-11-20 | 2021-02-19 | 嘉兴学院 | Preparation method of biomass porous carbon material based on novel iodine simple substance pore-forming agent and electrochemical energy storage application of biomass porous carbon material |
| 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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