CN1810637A - Process of preparing active carbon with high specific surface area and process of making super capacitor - Google Patents
Process of preparing active carbon with high specific surface area and process of making super capacitor Download PDFInfo
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- CN1810637A CN1810637A CN 200510031195 CN200510031195A CN1810637A CN 1810637 A CN1810637 A CN 1810637A CN 200510031195 CN200510031195 CN 200510031195 CN 200510031195 A CN200510031195 A CN 200510031195A CN 1810637 A CN1810637 A CN 1810637A
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- surface area
- specific surface
- active carbon
- high specific
- super capacitor
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Electric Double-Layer Capacitors Or The Like (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The process of preparing active carbon with great specific surface area includes the steps of stoving and crushing petroleum coke as material, mixing with KOH in certain ratio, heating and maintaining temperature in no-oxygen environment, cooling and washing with deionized water to neutrality. The process of making one kind of super capacitor includes mixing the active carbon powder possessing great specific surface area with adhesive, conducting graphite powder and dispersant in certain proportion, painting the mixture to foamed nickel, stoving, rolling into electrode sheets, adding diaphragm of modified non-woven fabric between adjacent electrode sheets, connected electrode sheets in parallel and setting inside a casing, and filling with electrolyte. The active carbon of the present invention has specific surface area as high as 2000-3000 sq m/g and medium pore rate not lower than 50 %, and is used as material for super capacitor with high performance/cost ratio and other advantages.
Description
Technical field
The present invention relates to a kind of active carbon with high specific surface area preparation method and a kind of ultracapacitor manufacture method.
Background technology
Common electrochemical energy storage element is to react the mutual conversion that realizes chemical energy and electric energy by oxidation-reduction, and occur in electrode material surface or interior oxidation-reduction reaction generally all can not be finished at short notice, therefore can not satisfy the requirement of high-specific-power and long circulation life.Ultracapacitor has that capacity is big, volume is little, discharge and recharge simple fast, use temperature wide ranges, voltage retentivity be good, discharge and recharge advantages such as number of times is unrestricted, can be used as the backup power source of computer memory, the accessory power supply of electromobile etc., therefore obtained people's extensive concern in recent years.
Electrode material for super capacitor mainly contains carbon materials, metal oxide materials and conducting polymer materials.Metal oxide materials is with RuO
2Be representative, have the advantage that good conductivity, specific storage are big, have extended cycle life, but the price height, the extensive use is restricted.Conducting polymer materials operating voltage height but resistance is big, gac cost performance height is an optimal candidate material of making electrode of super capacitor.
Common gac specific surface area is less than 1000m
2/ g, factors such as microvoid structure and micropore distribution also influence the performance of ultracapacitor.Therefore, common gac is not suitable for making electrode of super capacitor.Activated carbon for super capacitors not only requires to have high-specific surface area, and requires suitable pore structure and pore size distribution.
Summary of the invention
The technical problem to be solved in the present invention is, defective at the prior art existence, propose a kind of height ratio table and long-pending gac preparation method and ultracapacitor manufacture method, the gac that described gac preparation method makes has specific surface area (can reach 2000-3000m greatly
2/ g), mesopore prosperity (accounting for more than 50% of total pore volume), to overcome common gac deficiency technically; The preparation method of described ultracapacitor adopts above-mentioned height ratio table and the specific storage height (can reach 84F/g) of the ultracapacitor that long-pending gac makes.
One of technical solution of the present invention is that the step of described active carbon with high specific surface area preparation method is:
(1) get refinery coke, oven dry was crushed to 100 mesh sieves after naturally cooling to normal temperature;
(2) mass ratio by KOH and petroleum coke powder is 5-2: 1 weighs KOH and petroleum coke powder, mixes;
(3) mixture is placed nickel crucible, in oxygen-free environment, be heated to 850 ℃-950 ℃, be incubated 2-4 hour;
(4) naturally cool to normal temperature with stove, extremely neutral after taking out with deionized water wash;
(5) oven dry, promptly.
Described oxygen-free environment comprises charging into protective atmosphere or adopt in stove and covers on described mixture material and can protect described material not oxidized with the method for the material of oxygen reaction in the air.Described protective atmosphere can be nitrogen, argon gas etc.The specific surface area of prepared active carbon with high specific surface area reaches 2000-3000m
2/ g, middle porosity 〉=50%.
Two of technical solution of the present invention is that described ultracapacitor step of manufacturing is:
(1) activated carbon electrodes preparation:
A. getting specific surface area is 2000-3000m
2The active carbon with high specific surface area of/g, middle porosity 〉=50% is ground to granularity less than 0.075mm,
B. press mass ratio and add PTFE (tetrafluoroethylene) emulsion of 5%-10%, the electrically conductive graphite powder of 5%-8%, the CMC (carboxymethyl cellulose) of 0.5%-1%, stir and make it to become the slurry that mixes;
C. slurry is coated on the nickel foam oven dry;
D. be rolled into electrode slice;
(2) the modification nonwoven cloth barrier film is set between the adjacent electrode sheet;
(3) several electrode slice parallel connections, the two poles of the earth lug of electrode slice are welded on respectively on two poles, in the housing of then it being packed into;
(4) in housing, add electrolytic solution, the ordinary method encapsulation, promptly.
Described housing can be plastic casing or Stainless Steel Shell, and described electrolytic solution can adopt KOH electrolytic solution or LiPF
6Electrolytic solution.
It is raw material that active carbon with high specific surface area preparation method of the present invention adopts refinery coke, and KOH is a promoting agent, and prepared gac has high performance-price ratio, with its activated carbon electrodes superior performance of making;
In described ultracapacitor manufacture method, the PTFE emulsion is a caking agent, and conductive agent is the electrically conductive graphite powder, and CMC is a dispersion agent.The mixture of petroleum coke raw material after the described pulverizing and KOH is placed the nickel crucible heating and makes it activation, form described active carbon with high specific surface area.
As known from the above, the present invention is a kind of active carbon with high specific surface area preparation method and ultracapacitor manufacture method, and it is that raw material makes active carbon with high specific surface area that described gac preparation method adopts refinery coke, and its specific surface area reaches 2000-3000m
2/ g, middle porosity 〉=50% is a high performance-price ratio material of making the ultracapacitor activated carbon electrodes; Adopt the capacity of the ultracapacitor that described ultracapacitor manufacture method produces big, volume is little, discharge and recharge simple fast, good, the long service life of use temperature wide ranges, voltage retentivity, cost be low, specific capacitance can reach 84F/g.
Description of drawings
Fig. 1 is a kind of embodiment sectional structure synoptic diagram of ultracapacitor of the present invention;
In the drawings:
The 1-pole, the 2-housing,
The 3-activated carbon electrodes, 4-modification nonwoven cloth barrier film.
Embodiment
Embodiment 1: a kind of active carbon with high specific surface area preparation method, and step is:
(1) gets refinery coke, in 100 ℃ of-120 ℃ of baking ovens, dry, be crushed to 100 mesh sieves after naturally cooling to normal temperature;
(2) be to weigh KOH and refinery coke at 5: 1 by the mass ratio of KOH and petroleum coke powder, mix;
(3) compound is placed nickel crucible, in protective atmosphere (nitrogen), be heated to 850 ℃, be incubated 4 hours;
(4) cool to normal temperature with the furnace, extremely neutral after taking out with deionized water wash;
(5) oven dry, promptly.
Embodiment 2: a kind of active carbon with high specific surface area preparation method, and step is:
(1) gets refinery coke, in 100 ℃ of-120 ℃ of baking ovens, dry, be crushed to 100 mesh sieves after naturally cooling to normal temperature;
(2) be to weigh KOH and petroleum coke powder at 2: 1 by the mass ratio of KOH and petroleum coke powder, mix;
(3) compound is placed nickel crucible, in protective atmosphere (argon gas), be heated to 950 ℃, be incubated 2 hours;
(4) naturally cool to normal temperature with stove, extremely neutral after taking out with deionized water wash;
(5) oven dry, promptly.
Embodiment 3: a kind of ultracapacitor manufacture method the steps include:
(1) activated carbon electrodes preparation:
A. getting specific surface area is 2000-3000m
2The active carbon with high specific surface area of/g, middle porosity 〉=50% is ground to granularity less than 0.075mm;
B. press mass ratio and add 5%PTFE emulsion, 5% electrically conductive graphite powder, 0.5%CMC, high-speed stirring makes it to become the slurry that mixes;
C. slurry is coated on the nickel foam oven dry;
D. rolling into thickness with finishing mill is the thick electrode slice of 0.1-0.5mm;
(2) between adjacent two electrode slices, the modification nonwoven cloth barrier film is set;
(3) several (as 3-15, or the like) electrode slice parallel connections, the two poles of the earth lug of electrode slice is welded on respectively on two poles, in the plastic casing of then it being packed into;
(4) in housing, pour into the KOH solution that concentration is 4-6mol/L, conventional encapsulation, promptly.Prepared ultracapacitor operating voltage 1.0V, maximum operating currenbt 400A, specific storage 84F/g.
Embodiment 4: a kind of ultracapacitor manufacture method the steps include:
(1) activated carbon electrodes preparation:
A. getting specific surface area is 2000-3000m
2The active carbon with high specific surface area of/g, middle porosity 〉=50% is ground to granularity less than 0.075mm;
B. press mass ratio and add 10%PTFE emulsion, 8% electrically conductive graphite powder, 1%CMC, high-speed stirring makes it to become the slurry that mixes;
C. slurry is coated on the nickel foam oven dry;
D. rolling into thickness with finishing mill is the thick electrode slice of 0.1-0.5mm;
(2) between adjacent two electrode slices, the modification nonwoven cloth barrier film is set;
(3) several electrode slice parallel connections, the two poles of the earth lug of electrode slice are welded on respectively on two poles, in the Stainless Steel Shell of then it being packed into;
(4) in housing, pour into the LiPF that concentration is 0.8-1.2mol/L
6Electrolytic solution, conventional encapsulation, promptly.
Prepared ultracapacitor operating voltage 3.5V, maximum operating currenbt 400A, specific storage 50F/g.
Claims (4)
1, a kind of active carbon with high specific surface area preparation method is characterized in that, its step is:
(1) get refinery coke, oven dry was crushed to 100 mesh sieves after naturally cooling to normal temperature;
(2) mass ratio by KOH and petroleum coke powder is 5-2: 1 weighs KOH and petroleum coke powder, mixes;
(3) mixture is placed nickel crucible, s is heated to 850 ℃-950 ℃ in oxygen-free environment, is incubated 2-4 hour; (4) naturally cool to normal temperature with stove, extremely neutral after taking out with deionized water wash;
(5) oven dry, promptly.
2, active carbon with high specific surface area preparation method according to claim 1; it is characterized in that; described oxygen-free environment comprises charging into protective atmosphere or adopt in stove and covers and can protect described material not oxidized with the method for the material of oxygen reaction in the air that described protective atmosphere is nitrogen or argon gas etc. on described mixture material.
3, a kind of ultracapacitor manufacture method is characterized in that, its step is:
(1) activated carbon electrodes preparation:
A. getting specific surface area is 2000-3000m
2The active carbon with high specific surface area of/g, middle porosity 〉=50% is ground to granularity less than 0.075mm,
B. press the ptfe emulsion of mass ratio adding 5%-10%, the electrically conductive graphite powder of 5%-8%, the carboxymethyl cellulose of 0.5%-1%, stir and make it to become the slurry that mixes;
C. slurry is coated on the nickel foam oven dry;
D. be rolled into electrode slice;
(2) the modification nonwoven cloth barrier film is set between the adjacent electrode sheet;
(3) several electrode slice parallel connections, the two poles of the earth lug of electrode slice are welded on respectively on two poles, in the housing of then it being packed into;
(4) in housing, add electrolytic solution, the ordinary method encapsulation, promptly.
4, ultracapacitor manufacture method according to claim 1 is characterized in that, described electrolytic solution is that concentration is the LiPF of 0.8-1.2mol/L
6Solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100311957A CN100346430C (en) | 2005-01-26 | 2005-01-26 | Process of preparing active carbon with high specific surface area and process of making super capacitor |
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|---|---|---|---|
| CNB2005100311957A CN100346430C (en) | 2005-01-26 | 2005-01-26 | Process of preparing active carbon with high specific surface area and process of making super capacitor |
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| CN1810637A true CN1810637A (en) | 2006-08-02 |
| CN100346430C CN100346430C (en) | 2007-10-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583367A (en) * | 2012-01-19 | 2012-07-18 | 中国科学院山西煤炭化学研究所 | Preparation technology of mesopore-rich active carbon with high specific surface area |
| CN110676074A (en) * | 2019-07-15 | 2020-01-10 | 东佳电子（郴州）有限公司 | Pulse capacitor for fast discharge unit |
| CN115385333A (en) * | 2022-08-24 | 2022-11-25 | 齐鲁工业大学 | Potato seedling-based activated carbon and preparation method and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100532257B1 (en) * | 1997-06-16 | 2005-11-29 | 마츠시타 덴끼 산교 가부시키가이샤 | Electric double-layer capacitor and method for manufacturing the same |
| CN1057277C (en) * | 1997-11-20 | 2000-10-11 | 中国科学院山西煤炭化学研究所 | Preparation of activated carbon with high specific surface area |
| CN1304788A (en) * | 2000-12-13 | 2001-07-25 | 中国科学院山西煤炭化学研究所 | Activated carbon with high specific surface area |
| CN100477039C (en) * | 2001-11-14 | 2009-04-08 | 成都茵地乐电源科技有限公司 | Polarizable electrode carbon material for super capacitor and preparation method thereof |
| CN1271654C (en) * | 2002-08-19 | 2006-08-23 | 中国科学院山西煤炭化学研究所 | Method for mfg. high specific capacitance formed active carbon electrode |
-
2005
- 2005-01-26 CN CNB2005100311957A patent/CN100346430C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583367A (en) * | 2012-01-19 | 2012-07-18 | 中国科学院山西煤炭化学研究所 | Preparation technology of mesopore-rich active carbon with high specific surface area |
| CN110676074A (en) * | 2019-07-15 | 2020-01-10 | 东佳电子（郴州）有限公司 | Pulse capacitor for fast discharge unit |
| CN115385333A (en) * | 2022-08-24 | 2022-11-25 | 齐鲁工业大学 | Potato seedling-based activated carbon and preparation method and application thereof |
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|---|---|
| CN100346430C (en) | 2007-10-31 |
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Granted publication date: 20071031 Termination date: 20100228 |