CN109686595A - A kind of activation method and its supercapacitor applications of conduction carbon cloth - Google Patents
A kind of activation method and its supercapacitor applications of conduction carbon cloth Download PDFInfo
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- CN109686595A CN109686595A CN201910084424.3A CN201910084424A CN109686595A CN 109686595 A CN109686595 A CN 109686595A CN 201910084424 A CN201910084424 A CN 201910084424A CN 109686595 A CN109686595 A CN 109686595A
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- carbon cloth
- electrode
- conductive carbon
- activation
- electrolyte
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- 239000004744 fabric Substances 0.000 title claims abstract description 100
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 88
- 230000004913 activation Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- 238000002484 cyclic voltammetry Methods 0.000 claims abstract description 7
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052697 platinum Inorganic materials 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims 1
- 238000004506 ultrasonic cleaning Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000001994 activation Methods 0.000 description 22
- 150000001721 carbon Chemical class 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 238000004832 voltammetry Methods 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000000840 electrochemical analysis Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses the activation methods and its supercapacitor applications of a kind of conductive carbon cloth.Using 1M KOH solution as electrolyte, using two electrode systems, cyclic voltammetry processing is carried out under certain condition, the conductive carbon cloth of activation can be obtained.In 1 M KOH electrolyte, chemical property evaluation is carried out to conductive carbon cloth within the scope of -1 ~ 0V potential window, and compared with the original carbon cloth not being activated carries out performance, original carbon cloth capacity is 1.40 F/cm2, carbon cloth maximum capacity is up to 1.84 F/cm after activation processing2, illustrate that this activating treatment method can be obviously improved the specific capacitance of carbon cloth.
Description
Technical field
The invention belongs to supercapacitor fields, and in particular to a kind of activation method and its supercapacitor of conduction carbon cloth
Using.
Background technique
Due to being continuously increased for fossil fuel crisis and renewable energy demand, clean energy resource is developed, develops high-performance electric
Chemical energy storage device becomes the key subjects of relationship human survival and development.Meanwhile with the hair at full speed of electronics and information industry
Exhibition, requirement of the people to energy storage device is higher and higher, and compared with lithium ion battery, supercapacitor is in power density and high stable
Property aspect there is the strong advantage of teaching, this obtains it in portable electronic, hybrid vehicle and spare energy system
It is widely applied.However, supercapacitor there is also prices it is higher, energy density is low the problems such as, therefore keep compared with Gao Gong
Under the premise of rate density, the energy density for improving supercapacitor is to develop the trend and hot spot of supercapacitor of new generation.
According to the calculation formula E=0.5CV of energy density2, the energy density of supercapacitor can by specific capacitance and
Improve in terms of operating voltage two.From the point of view of specific capacitance, the electrode material with high specific capacitance can be selected, such as counterfeit electricity
Appearance type electrode material.From the point of view of operating voltage, it is non-can to construct water system by the potential window for combining anode different with cathode
Symmetrical supercapacitor widens the operating voltage of entire capacitor.In various electrode materials, carbon-based material, such as carbon ball, carbon
Nanotube and graphene are extensive due to its high-specific surface area, low cost, excellent electric conductivity and excellent chemical property
As super capacitor anode.However, these carbon-based materials have lower specific capacitance due to its intrinsic layer mechanism,
Limit total capacity C (1/C=1/CJust+1/CIt is negative) promotion, become the major obstacle of super capacitor energy density.
Conductive carbon cloth is made of many uniform carbon fibers, is a kind of cheap conductive spinning product, has excellent
Mechanical elasticity and intensity therefore have great application prospect in terms of manufacturing flexible electrode, can be used as other electrodes
The flexible current-collecting body of material, but also can be directly as flexible electrode.But, other carbon materials are compared, it is commercialized original
Conductive carbon cloth is seldom used directly to energy storage material, this is because on the one hand the electro-chemical activity of conductive carbon cloth is lower, another party
Its specific surface area of face is smaller, these reasons cause its energy storage capability low.Therefore, the electricity of the conductive carbon cloth of business how is improved
Chemical property becomes a big hot spot of research flexible electrode.
Summary of the invention
Based on the above status, conductive carbon cloth is activated in KOH solution by the present invention by cyclic voltammetry, by function
Group introduces its surface to generate fake capacitance, and increases its surface area simultaneously, and then promotes the chemical property of conductive carbon cloth.
Specifically using KOH solution as electrolyte, using two electrode systems, cyclic voltammetry processing is carried out under certain condition, can be obtained
To the conductive carbon cloth of activation, carbon cloth after activation processing within the scope of -1~0V potential window specific capacitance up to 1.84F/cm2, can
Directly as flexible super capacitor negative electrode material；Simultaneously because the three-dimensional net structure of conductive carbon cloth, can carry other cathode
Material further obtains the super capacitor anode material with more high specific capacitance.
Technical method of the invention the following steps are included:
(1) clean conductive carbon cloth: by carbon cloth be placed sequentially in the hydrochloric acid of 3M, deionized water, acetone, in ethanol solution
It is cleaned by ultrasonic 20min, then dries stand-by；
(2) activate conductive carbon cloth: configuration a certain concentration KOH solution is as electrolyte, using two electrode of electrochemical workstation
System, using conductive carbon cloth as working electrode, platinized platinum is used as to electrode, using the circulation in two electrode system of electrochemical workstation
Voltammetric method activates conductive carbon cloth under the conditions of certain potentials range and sweep speed, the conductive carbon after being activated
Cloth.The electrolyte KOH solution concentration range is 1~6M.Voltage range is -0.8~-1.2V；Sweep speed be 5~
20mV/s；Activation time is 5-20s.
Technical solution of the present invention is by preparation-obtained activation carbon cloth application of electrode in supercapacitor.
The present invention activation after conductive carbon cloth compared to activation before, specific capacitance is obviously improved.The reason is that: after activation
Carbon cloth surfaces become the coarse electric double layer capacitance for making material and are promoted；A large amount of oxide groups are introduced in activation process increases carbon
The fake capacitance of cloth.
Detailed description of the invention
Fig. 1 is the comparison diagram that carbon cloth and unactivated carbon cloth are activated in embodiment 1；Wherein, (a) is that embodiment 1 activates carbon cloth
With the cyclic voltammogram of unactivated carbon cloth, scheming (b) is the charge and discharge electrograph that embodiment 1 activates carbon cloth and unactivated carbon cloth, and figure (c) is
The high rate performance figure of embodiment 1 activation carbon cloth and unactivated carbon cloth.
Fig. 2 is the comparison diagram that carbon cloth and unactivated carbon cloth are activated in embodiment 2；Wherein, (a) is that embodiment 2 activates carbon cloth
With the cyclic voltammogram of unactivated carbon cloth, scheming (b) is the charge and discharge electrograph that embodiment 2 activates carbon cloth and unactivated carbon cloth；Scheming (c) is
The high rate performance figure of embodiment 2 activation carbon cloth and unactivated carbon cloth.
Fig. 3 is the comparison diagram that carbon cloth and unactivated carbon cloth are activated in embodiment 3；Wherein, (a) is that embodiment 3 activates carbon cloth
With the cyclic voltammogram of unactivated carbon cloth, scheming (b) is the charge and discharge electrograph that embodiment 3 activates carbon cloth and unactivated carbon cloth, and figure (c) is
The high rate performance figure of embodiment 3 activation carbon cloth and unactivated carbon cloth.
Specific embodiment
To further appreciate that summary of the invention and feature of the invention, several embodiments of the present invention are given below, it should be appreciated that
These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
Experimental method in following embodiments is unless otherwise instructed conventional method.
Embodiment 1
(1) clean conductive carbon cloth: by carbon cloth be placed sequentially in the hydrochloric acid of 3M, deionized water, acetone, in ethanol solution
It is cleaned by ultrasonic 20min, then dries stand-by；
(2) activate conductive carbon cloth: configuration 1M KOH solution is as electrolyte, using conductive carbon cloth as working electrode, platinized platinum
As to electrode, using the cyclic voltammetric method in two electrode system of electrochemical workstation, potential range be -1~-0.9V and
Sweep speed is handled conductive carbon cloth under conditions of being 10mV/s, time 10s.It is unactivated conduction carbon cloth label be,
Carbon cloth after activation is labeled as 2.
It (3) is to pole with platinum electrode using this electrode as negative electrode, saturated calomel electrode is reference electrode, three electricity of composition
Pole test system, using CHI660D electrochemical test system, is followed using 1M KOH as electrolyte with constant current density
Ring volt-ampere and charge-discharge test, charging/discharging voltage range is in -1~0V.
Electrochemical results show, the charge and discharge time for activating carbon cloth electrode is higher than blank carbon cloth (attached drawing 1b), by than
Capacitor calculation formulaObtain specific capacitance (attached drawing 1c) of the activation carbon cloth electrode under different current densities, You Tuke
Know, maximum area specific capacitance can achieve 1.72F/cm after conductive carbon cloth activation2, hence it is evident that it is better than blank carbon cloth.
Embodiment 2
(1) clean conductive carbon cloth: by carbon cloth be placed sequentially in the hydrochloric acid of 3M, deionized water, acetone, in ethanol solution
It is cleaned by ultrasonic 20min, then dries stand-by；
(2) activate conductive carbon cloth: configuration 1M KOH solution is as electrolyte, using conductive carbon cloth as working electrode, platinized platinum
It is -0.9~-0.8V in potential range using the cyclic voltammetric method in two electrode system of electrochemical workstation as to electrode
Conductive carbon cloth is handled under conditions of being 10mV/s with sweep speed, time 10s.It is unactivated conduction carbon cloth label be
1, the carbon cloth after activation is labeled as 3.
It (3) is to pole with platinum electrode using this electrode as negative electrode, saturated calomel electrode is reference electrode, three electricity of composition
Pole test system, using CHI660D electrochemical test system, is recycled using 1MKOH as electrolyte with constant current density
Volt-ampere and charge-discharge test, charging/discharging voltage range is in -1~0V.
Electrochemical results show, the charge and discharge time for activating carbon cloth electrode is higher than blank carbon cloth (attached drawing 2b), by than
Capacitor calculation formulaObtain specific capacitance (attached drawing 2c) of the activation carbon cloth electrode under different current densities, You Tuke
Know, maximum area specific capacitance can achieve 1.61F/cm after conductive carbon cloth activation2, hence it is evident that it is better than blank carbon cloth.
Embodiment 3
(1) clean conductive carbon cloth: by carbon cloth be placed sequentially in the hydrochloric acid of 3M, deionized water, acetone, in ethanol solution
It is cleaned by ultrasonic 20min, then dries stand-by；
(2) activate conductive carbon cloth: configuration 1M KOH solution is as electrolyte, using conductive carbon cloth as working electrode, platinized platinum
As to electrode, using the cyclic voltammetric method in two electrode system of electrochemical workstation, potential range be -1~-0.9V and
Sweep speed is handled conductive carbon cloth under conditions of being 5mV/s, time 20s.It is unactivated conduction carbon cloth label be,
Carbon cloth after activation is labeled as 4.
It (3) is to pole with platinum electrode using this electrode as negative electrode, saturated calomel electrode is reference electrode, three electricity of composition
Pole test system, using CHI660D electrochemical test system, is recycled using 1MKOH as electrolyte with constant current density
Volt-ampere and charge-discharge test, charging/discharging voltage range is in -1~0V.
Electrochemical results show, the charge and discharge time for activating carbon cloth electrode is higher than blank carbon cloth (attached drawing 1b), by than
Capacitor calculation formulaObtain specific capacitance (attached drawing 1c) of the activation carbon cloth electrode under different current densities, You Tuke
Know, maximum area specific capacitance can achieve 1.84F/cm after conductive carbon cloth activation2, hence it is evident that it is better than blank carbon cloth.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084424.3A CN109686595B (en) | 2019-01-18 | 2019-01-18 | Activation method of conductive carbon cloth and application of supercapacitor of conductive carbon cloth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084424.3A CN109686595B (en) | 2019-01-18 | 2019-01-18 | Activation method of conductive carbon cloth and application of supercapacitor of conductive carbon cloth |
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| Publication Number | Publication Date |
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| CN109686595A true CN109686595A (en) | 2019-04-26 |
| CN109686595B CN109686595B (en) | 2020-11-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690057A (en) * | 2019-09-27 | 2020-01-14 | 同济大学 | Nickel-intercalated manganese dioxide-based flexible quasi-solid-state supercapacitor material and its preparation method and application |
| CN113077990A (en) * | 2021-03-17 | 2021-07-06 | 三峡大学 | Double-potential interval activation for improving Co (OH)2Method for performance of super capacitor |
Citations (5)
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|---|---|---|---|---|
| JP2008066681A (en) * | 2006-09-11 | 2008-03-21 | Osaka Prefecture Univ | Electrochemical capacitor and method for producing electrochemical capacitor zinc electrode |
| CN105780364A (en) * | 2016-02-26 | 2016-07-20 | 浙江大学 | Method for preparing super-microporous flexible carbon cloth and product thereof and application |
| CN107221454A (en) * | 2017-06-08 | 2017-09-29 | 陕西师范大学 | A kind of all-solid-state flexible ultracapacitor based on porous carbon fiber cloth and preparation method thereof |
| CN107768150A (en) * | 2017-10-26 | 2018-03-06 | 吉林大学 | Copper ion doped polyaniline electrode with carbon cloth as substrate and preparation method thereof |
| CN107934955A (en) * | 2017-11-17 | 2018-04-20 | 浙江大学 | A kind of method of activation process commercialization carbon cloth |
-
2019
- 2019-01-18 CN CN201910084424.3A patent/CN109686595B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| JP2008066681A (en) * | 2006-09-11 | 2008-03-21 | Osaka Prefecture Univ | Electrochemical capacitor and method for producing electrochemical capacitor zinc electrode |
| CN105780364A (en) * | 2016-02-26 | 2016-07-20 | 浙江大学 | Method for preparing super-microporous flexible carbon cloth and product thereof and application |
| CN107221454A (en) * | 2017-06-08 | 2017-09-29 | 陕西师范大学 | A kind of all-solid-state flexible ultracapacitor based on porous carbon fiber cloth and preparation method thereof |
| CN107768150A (en) * | 2017-10-26 | 2018-03-06 | 吉林大学 | Copper ion doped polyaniline electrode with carbon cloth as substrate and preparation method thereof |
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Non-Patent Citations (1)
| Title |
|---|
| KAROLINA KORDEK: "Cobalt-based composite films on electrochemically activated carbon cloth as high performance overall water splitting electrodes", 《INTERNATIONAL JOURNAL OF HYDROGEN ENERGY》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690057A (en) * | 2019-09-27 | 2020-01-14 | 同济大学 | Nickel-intercalated manganese dioxide-based flexible quasi-solid-state supercapacitor material and its preparation method and application |
| CN113077990A (en) * | 2021-03-17 | 2021-07-06 | 三峡大学 | Double-potential interval activation for improving Co (OH)2Method for performance of super capacitor |
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| Publication number | Publication date |
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| CN109686595B (en) | 2020-11-10 |
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