CN108069425A - Nano strip activated carbon and its preparation method and application - Google Patents
Nano strip activated carbon and its preparation method and application Download PDFInfo
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- CN108069425A CN108069425A CN201711343926.0A CN201711343926A CN108069425A CN 108069425 A CN108069425 A CN 108069425A CN 201711343926 A CN201711343926 A CN 201711343926A CN 108069425 A CN108069425 A CN 108069425A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of nano strip activated carbons and preparation method and application.Nano strip method for preparation of active carbon of the present invention comprises the step of：Nano strip phenolic resin based polyalcohol is subjected to charing process, carbide is subjected to activation process and activation products are subjected to carrying out washing treatment.Nano strip activated carbon large specific surface area of the present invention, specific capacitance are high.Its preparation method will be carbonized and activating process is combined processing, and process conditions are easily-controllable, and so as to which the stability of the activated carbon characteristic prepared be effectively ensured, phenolic resin based polyalcohol raw material sources enrich, and better performances effectively reduce cost.
Description
Technical field
The invention belongs to porous charcoal technical fields, and in particular to a kind of nano strip activated carbon and preparation method thereof and should
With.
Background technology
Since ultracapacitor has, power density is high, energy density is big, has extended cycle life and the spies such as security reliability height
Point is mainly used in main power source, backup power supply and substitute electric power etc., has in electronic product, electric vehicle, intelligent grid field
Important role has broad application prospects in information technology, aerospace field.In recent years, the application of ultracapacitor
Field is constantly expanded, and is further expanded to from military field and Public Service Field among daily life, therefore is prepared
The electrode material with higher power, high-energy density applied to high specific capacitance ultracapacitor becomes more and more important.
Ultracapacitor is typically to be formed by four bipolar electrode, electrolyte, collector, membrane component combinations, to reach
High specific capacitance, have extended cycle life with security and stability it is good the advantages that, improve that the electrode material of bipolar electrode is made is best selection,
Because electrode material is to influence the core component of performance of the supercapacitor and the most various component of species.It is commercial at present super
Grade capacitor is mostly using activated carbon, and the raw material sources of mainly activated carbon enrich, good electric conductivity, higher specific surface
Product, the chemical characteristic stablized and controllable pore structure.
Using activated carbon as electrode material, ultracapacitor relies on electric double layer energy storage, theoretically specific capacitance and specific surface into
Proportional relationship.But actual conditions are not so simple, the specific capacity and specific surface area of active carbon electrode material are in not
Linear relationship, except the specific surface area of activated carbon, the pore-size distribution of activated carbon, surface state, electric conductivity, the wellability of electrolyte
And microscopic appearance etc. can all influence its chemical property.Take into full account these influence factors, comprehensive advantage reasonably selects
Raw material that are at low cost and easily preparing are only the effective way of high performance-price ratio absorbent charcoal material.Nano strip phenolic resin base polymerize
Object has the characteristics that at low cost, easy preparation and yield are high, while its nano strip nanostructured and three-dimensional network-like structure are also
Ion transmission provides big active site and open conduction pathway.It there is no at present by nano strip phenolic resin based polyalcohol
Appropriately processed method prepares the report of activated carbon for super capacitors.
The content of the invention
It is an object of the invention to solve nano strip phenolic resin based polyalcohol poorly conductive etc. using the prior art
Problem, provides a kind of nano strip activated carbon and preparation method thereof, and the nano strip activated carbon of preparation has higher specific surface
Product and excellent wetability, for obtaining higher specific capacity in ultracapacitor.
The technological means that the present invention uses is as follows：
On the one hand, the present invention provides a kind of preparation method of nano strip phenolic resin-based activated carbon, including following step
Suddenly：
Nano strip phenolic resin based polyalcohol is subjected to charing process, obtains carbide；
Mixed processing will be carried out with activator after the ground processing of the carbide, carried out at 800-850 DEG C at activation
Reason；
The activation products of activated processing are subjected to carrying out washing treatment, until pH is 6-7.
Another aspect of the present invention provides a kind of nano strip activated carbon.The nano strip activated carbon is by the present invention
The preparation method of nano strip activated carbon prepares to be formed.
Another aspect of the present invention provides the application process of nano strip activated carbon.The nano strip activated carbon exists
Application in ultracapacitor, lithium ion battery, lithium-sulfur cell.
Compared with prior art, nano strip activated carbon of the present invention and preparation method thereof is polymerize with phenolic resin base nanobelt
Object is raw material, and carbonization and activating process are combined so that the activated carbon of generation is nanobelt shape structure, and big specific surface
Product and specific pore-size distribution, surface state, just because the activated carbon of preparation have big specific surface area and specific pore-size distribution,
Surface state, wetability is good, so that its specific capacitance is high.In addition, preparation method of the present invention only need to be by carbonization and activating process
Processing is combined, without multiple activation process, process conditions are easily-controllable, so as to which the steady of the activated carbon characteristic prepared be effectively ensured
Qualitative, secondly, phenolic resin based polyalcohol raw material sources enrich, and better performances effectively reduce cost.
There is big specific surface area and specific pore-size distribution, surface shape just because of nano strip activated carbon of the present invention
State, wetability is good, and specific capacitance is high, therefore, can be efficiently applied in ultracapacitor, lithium ion battery, lithium-sulfur cell, carry
The chemical property of high corresponding device.
Description of the drawings
Fig. 1 is the preparation method flow diagram of nano strip activated carbon of the embodiment of the present invention；
Fig. 2 is scanning electron microscope (SEM) figure of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 3 is high magnification scanning electron microscope (SEM) figure of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 4 is the attached isothermal curve figure of adsorption/desorption of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 5 is the graph of pore diameter distribution of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 6 is the cyclic voltammetry curve figure of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 7 is the constant current charge-discharge graph of nano strip activated carbon prepared by the embodiment of the present invention 4；
Fig. 8 is the attached isothermal curve figure of adsorption/desorption of activated carbon prepared by comparative example 1；
Fig. 9 is the graph of pore diameter distribution of activated carbon prepared by comparative example 1；
Figure 10 is the cyclic voltammetry curve figure of activated carbon prepared by comparative example 1；
Figure 11 is the constant current charge-discharge graph of activated carbon prepared by comparative example 1.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain
The present invention is not intended to limit the present invention.
The quality of each component noted in the disclosure of the embodiment of the present invention not only may refer to the specific of each component and contain
Amount can also represent the proportionate relationship of quality between each component, therefore, as long as according to specification each component of the embodiment of the present invention
Content is scaled up or reduced within specification of embodiment of the present invention scope of disclosure.Specifically, the embodiment of the present invention
Quality described in specification can be mass unit well known to the chemical fields such as μ g, mg, g, kg.
On the one hand, an embodiment of the present invention provides a kind of nano strips with big specific surface area and excellent wetability
The preparation method of activated carbon.The nano strip method for preparation of active carbon includes the following steps：
S01. nano strip phenolic resin based polyalcohol is subjected to charing process：By nano strip phenolic resin based polyalcohol
Charing process is carried out, obtains carbide；
S02. carbide is subjected to activation process：It will carry out mixing place with activator after the ground processing of the carbide
Reason, carries out activation process at 800-850 DEG C；
S03. activation products are subjected to carrying out washing treatment：The activation products of activated processing are subjected to carrying out washing treatment, until pH
For 6-7.
Wherein, the nano strip phenolic resin based polyalcohol in the step S01 can be prepared according to existing method,
The preparation method of nano strip phenolic resin based polyalcohol in following article embodiment 1.The nano strip phenolic resin base polymerize
Object has three-dimensional network-like structure, by the charing process in step S01, can generate carbide, and be conducive to carbide shape
Into effective conductive network and increase porosity.In addition, before nano strip phenolic resin based polyalcohol carries out charing process, it is excellent
Choosing is ground processing to nano strip phenolic resin based polyalcohol so that nano strip phenolic resin based polyalcohol raw material
Grain is uniformly.
In one embodiment, the method for the charing process is as follows：Under inert gas shielding, by phenol described in nano strip
Urea formaldehyde based polyalcohol is warming up to 650-800 DEG C of progress carbonization reaction with the rate of 2-5 DEG C/min.In a particular embodiment, institute
The method for stating charing process is as follows：Under inert gas shielding, by phenolic resin based polyalcohol described in nano strip with 5 DEG C/min
Rate be warming up to 650 DEG C progress carbonization reactions.Wherein, inert gas can be the gaseous environments such as common nitrogen, argon gas.
It can be the routine side that proportionately material mixes that carbide in the step S02 carries out mixed processing with activator
Method, such as grinding, stirring mixing treatment, as long as carbide is enabled to be sufficiently mixed processing in this hair with activator
Bright embodiment scope of disclosure.In one embodiment, the carbide can be 1 according to mass ratio with activator:(1~5) such as has
Body is 1:4 ratio carries out mixing treatment.
In addition, at 800-850 DEG C during activation process, the effect of the activator is activator meeting and charcoal under high temperature
It chemically reacts, while nano strip activated carbon structure is not destroyed, significantly increases specific surface area and micropore quantity.
Wherein, the activator can be KOH, NaOH, K2CO3、K2O etc..
In one embodiment, the method for the activation process is as follows：Under inert gas shielding, by the carbide and activation
The mixture of agent is first warming up to 400-450 DEG C with the rate of 3-5 DEG C/min, and 30-60min is kept the temperature under conditions of 400-450 DEG C,
800-850 DEG C is warming up to again, and 1-1.5h is kept the temperature under conditions of 800-850 DEG C.In a particular embodiment, the activation process
Method is as follows：Under inert gas shielding, the mixture of the carbide and KOH are first warming up to 400 with the rate of 5 DEG C/min
DEG C, 30min is kept the temperature under conditions of 400 DEG C, then 800 DEG C are warming up to, keep the temperature 1h under conditions of 800 DEG C.Wherein, inert gas
Can be the gaseous environments such as common nitrogen, argon gas.
Phenolic resin based polyalcohol will not be caused to occur to the activation process in the charing process and S02 of above-mentioned steps S01
Pyrolysis, has been effectively kept the characteristic of its microstructure.
Carrying out washing treatment in the step S03 is to remove deactivator or other byproduct of reaction impurity etc..One implements
Example in, carrying out washing treatment can be first washed with water, and then pickling is washed with water again, until to greatest extent except deactivator or its
His byproduct of reaction impurity etc..Explaining the mark of washing contact is, the pH after washing is 6-7, that is to say the carbonization after being washed
The pH of object is 6-7.After carrying out washing treatment, carbide is dried, dry 12h at 100 DEG C of carbide after being such as washed.
Therefore, above-mentioned nano strip method for preparation of active carbon will be carbonized using phenolic resin base nanobelt polymer as raw material
It is combined with activating process so that the activated carbon of generation is nanobelt shape structure, and big specific surface area and specific aperture
Distribution, surface state, wetability are good.In addition, carbonization and activating process need to be only combined processing by the preparation method, without more
Secondary activation process, process conditions are easily-controllable, so as to which the stability of the activated carbon characteristic prepared, secondly, phenolic aldehyde tree be effectively ensured
Aliphatic radical polymer raw material abundance, better performances effectively reduce cost.
Correspondingly, on the basis of nano strip method for preparation of active carbon above, the embodiment of the present invention additionally provides one kind
Nano strip activated carbon.Specifically, the nano strip activated carbon is prepared by nano strip method for preparation of active carbon above,
Therefore, because the activated carbon prepared by the nano strip method for preparation of active carbon as described above has big specific surface area
With specific pore-size distribution, surface state, wetability is good, and therefore, the nano strip activated carbon has high specific capacitance height.
Just because the nano strip activated carbon has bigger serface and excellent wetability, can be effective to surpass
In the fields such as grade capacitor, lithium ion battery, lithium-sulfur cell.Such as in one embodiment, using nano strip activated carbon as electrode
Material is used in ultracapacitor, particularly grinds the nano strip activated carbon, electrode is prepared using semar technique, with bubble
Foam nickel is collector, and acetylene black is conductive agent, and PTFE is binding agent, with 6mol L-1KOH tests for electrolyte.The result shows that institute
The specific surface area for stating nano strip activated carbon is 2291m2g-1, it is 1A g in current density-1When specific capacitance be up to 317.8F g-1。
In conjunction with specific example, nano strip activated carbon of the embodiment of the present invention and preparation method thereof is carried out further detailed
Explanation.
Embodiment 1
The present embodiment provides a kind of nano strip activated carbons and preparation method thereof.The nano strip activated carbon according to including
It is prepared by the steps：
(1) by 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL in autoclave
It is sufficiently mixed in 200mL polytetrafluoroethyllining linings, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by gained
Product filters and is washed to pH as 6-7, then is placed in 100 DEG C of oven drying 6h and obtains 2g phenolic resin base nano strip polymer.
Products therefrom is ground, 1.8g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, with the rate liter of 5 DEG C/min
For temperature to 650 DEG C, heat preservation 0.5h obtains carbonized product；
(2) carbonized product obtained by step (1) is ground, takes 0.2g carbonized products and 0.2gKOH activator ground and mixeds
Uniformly；Obtained mixture is first warming up to 400 DEG C, at 400 DEG C under inert gas (Ar) protection with the rate of 5 DEG C/min
Under conditions of keep the temperature 30min, then be warming up to 800 DEG C, 1h kept the temperature under conditions of 800 DEG C and obtains activation products；
(3) activation products that step (2) obtains washed, the washing of 10% dilute hydrochloric acid, be washed to pH again as 6-7,100
At DEG C ultracapacitor phenolic resin base nano strip activated carbon is prepared after dry 12h.
Embodiment 2
The present embodiment provides a kind of nano strip activated carbons and preparation method thereof.The nano strip activated carbon according to including
It is prepared by the steps：
(1) by 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL in autoclave
It is sufficiently mixed in 200mL polytetrafluoroethyllining linings, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by gained
Product filters and is washed to pH as 6-7, then is placed in 100 DEG C of oven drying 6h and obtains 2g phenolic resin base nano strip polymer.
Products therefrom is ground, 1.8g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, with the rate liter of 5 DEG C/min
For temperature to 650 DEG C, heat preservation 0.5h obtains carbonized product；
(2) carbonized product obtained by step (1) is ground, takes 0.2g carbonized products and 0.4gKOH activator ground and mixeds
Uniformly；Obtained mixture is first warming up to 400 DEG C, at 400 DEG C under inert gas (Ar) protection with the rate of 5 DEG C/min
Under conditions of keep the temperature 30min, then be warming up to 800 DEG C, 1h kept the temperature under conditions of 800 DEG C and obtains activation products；
(3) activation products that step (2) obtains washed, the washing of 10% dilute hydrochloric acid, be washed to pH again as 6-7,100
At DEG C ultracapacitor phenolic resin base nano strip activated carbon is prepared after dry 12h.
Embodiment 3
The present embodiment provides a kind of nano strip activated carbons and preparation method thereof.The nano strip activated carbon according to including
It is prepared by the steps：
(1) by 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL in autoclave
It is sufficiently mixed in 200mL polytetrafluoroethyllining linings, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by gained
Product filters and is washed to pH as 6-7, then is placed in 100 DEG C of oven drying 6h and obtains 2g phenolic resin base nano strip polymer.
Products therefrom is ground, 1.8g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, with the rate liter of 5 DEG C/min
For temperature to 650 DEG C, heat preservation 0.5h obtains carbonized product；
(2) carbonized product obtained by step (1) is ground, takes 0.2g carbonized products and 0.6gKOH activator ground and mixeds
Uniformly；Obtained mixture is first warming up to 400 DEG C, at 400 DEG C under inert gas (Ar) protection with the rate of 5 DEG C/min
Under conditions of keep the temperature 30min, then be warming up to 800 DEG C, 1h kept the temperature under conditions of 800 DEG C and obtains activation products；
(3) activation products that step (2) obtains washed, the washing of 10% dilute hydrochloric acid, be washed to pH again as 6-7,100
At DEG C ultracapacitor phenolic resin base nano strip activated carbon is prepared after dry 12h.
Embodiment 4
The present embodiment provides a kind of nano strip activated carbons and preparation method thereof.The nano strip activated carbon according to including
It is prepared by the steps：
(1) by 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL in autoclave
It is sufficiently mixed in 200mL polytetrafluoroethyllining linings, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by gained
Product filters and is washed to pH as 6-7, then is placed in 100 DEG C of oven drying 6h and obtains 2g phenolic resin base nano strip polymer.
Products therefrom is ground, 1.8g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, with the rate liter of 5 DEG C/min
For temperature to 650 DEG C, heat preservation 0.5h obtains carbonized product；
(2) carbonized product obtained by step (1) is ground, takes 0.2g carbonized products and 0.8gKOH activator ground and mixeds
Uniformly；Obtained mixture is first warming up to 400 DEG C, at 400 DEG C under inert gas (Ar) protection with the rate of 5 DEG C/min
Under conditions of keep the temperature 30min, then be warming up to 800 DEG C, 1h kept the temperature under conditions of 800 DEG C and obtains activation products；
(3) activation products that step (2) obtains washed, the washing of 10% dilute hydrochloric acid, be washed to pH again as 6-7,100
At DEG C ultracapacitor phenolic resin base nano strip activated carbon is prepared after dry 12h.
Embodiment 5
The present embodiment provides a kind of nano strip activated carbons and preparation method thereof.The nano strip activated carbon according to including
It is prepared by the steps：
(1) by 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL in autoclave
It is sufficiently mixed in 200mL polytetrafluoroethyllining linings, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by gained
Product filters and is washed to pH as 6-7, then is placed in 100 DEG C of oven drying 6h and obtains 2g phenolic resin base nano strip polymer.
Products therefrom is ground, 1.8g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, with the rate liter of 5 DEG C/min
For temperature to 800 DEG C, heat preservation 0.5h obtains carbonized product；
(2) carbonized product obtained by step (1) is ground, takes 0.2g carbonized products and 1.0gKOH activator ground and mixeds
Uniformly；Obtained mixture is first warming up to 450 DEG C, at 450 DEG C under inert gas (Ar) protection with the rate of 5 DEG C/min
Under conditions of keep the temperature 60min, then be warming up to 800 DEG C, 1h kept the temperature under conditions of 800 DEG C and obtains activation products；
(3) activation products that step (2) obtains washed, the washing of 10% dilute hydrochloric acid, be washed to pH again as 6-7,100
At DEG C ultracapacitor phenolic resin base nano strip activated carbon is prepared after dry 12h.
Comparative example 1
By 1.65g hydroquinones, 37% formalins of 2.5mL and 10% hydrochloric acid of 110mL autoclave 200mL
It is sufficiently mixed in polytetrafluoroethyllining lining, autoclave is sealed and placed in keep the temperature 12h in 180 DEG C of baking ovens, by products therefrom
It filters and is washed to pH as 6-7, then be placed in 100 DEG C of oven drying 6h and obtain 2g phenolic resin base nano strip polymer.By institute
Product grinding is obtained, 1.2g is taken to be placed in closed stove intracavitary, under inert gas (Ar) protection, is warming up to the rate of 5 DEG C/min
950 DEG C, then in CO240min is kept the temperature in atmosphere, obtains activation products.
Correlated performance is tested：
1.SEM is scanned：The activated carbon that the nano strip activated carbon that embodiment 1- embodiments 5 provide provides is scanned electricity
Mirror (SEM) processing.The nano strip activated carbon SEM that embodiment 4 provides schemes as shown in Figure 2,3, wherein, Fig. 3 is the high magnification of Fig. 2
SEM schemes.SEM figures and Fig. 2,3 more approximate of embodiment 1-3, the 5 nano strip activated carbons provided.Schemed from SEM, it is described to receive
Rice has the porous structure of three-dimensional network with shaped activated carbon.Therefore, its three dimensional network with opening of activated carbon of the embodiment of the present invention
Network shape conductive structure provides passage for the ion diffusion in electrolyte, can play a significant role in fast charging and discharging.
2. the attached performance of adsorption/desorption：What the nano strip activated carbon and comparative example that embodiment 1- embodiments 5 are provided provided
Activated carbon tests the attached performance of adsorption/desorption of activated carbon by Full-automatic physical adsorption instrument.Wherein, the nanometer that embodiment 4 provides
The attached performance curve of adsorption/desorption with shaped activated carbon is as shown in Figure 4.The suction of embodiment 1-3, the 5 nano strip activated carbons provided
Attached/desorption performance curve is more approximate with Fig. 4.And the attached performance curve of adsorption/desorption of comparative example 1 is as shown in Figure 8.Comparison diagram 4
Understand that nano strip activated carbon provided in an embodiment of the present invention is in low relative pressure with the attached performance curve of adsorption/desorption of Fig. 8
Adsorption curve at (0-0.1) steeply rises, and shows that there are substantial amounts of micropores；With the increase of relative pressure, absorption and desorption
Lag loop between attached thermoisopleth clearly, shows that there are mesoporous；Adsorption curve is fast under the relative pressure more than 0.95
Speed rises, and shows that there are macropores.
3. pore-size distribution is tested：The work that the nano strip activated carbon and comparative example that embodiment 1- embodiments 5 are provided provide
Property charcoal carry out pore-size distribution test.Wherein, the pore-size distribution for the nano strip activated carbon that embodiment 4 provides is as shown in Figure 5.Implement
Example 1-3, the attached performance curve of adsorption/desorption of the 5 nano strip activated carbons provided are more approximate with Fig. 5.The pore-size distribution of comparative example 1
Figure is as shown in Figure 9.From graph of pore diameter distribution, the average pore size of nano strip activated carbon of the embodiment of the present invention is 3.10nm,
In, part aperture 0.5-2nm；And the average pore size of comparative example 1 is 2.80nm.
4. cyclic voltammetric and the test of constant current charge-discharge curve：The nano strip activity that embodiment 1- embodiments 5 are provided
The activated carbon that charcoal and comparative example provide is ground respectively, and electrode is prepared using semar technique, using nickel foam as collector, acetylene black
For conductive agent, PTFE is binding agent, with 6mol L-1KOH is electrolyte, prepares ultracapacitor respectively, and measures Xun Huan respectively
Volt-ampere and constant current charge-discharge curve.Wherein, the cyclic voltammetry curve such as Fig. 6 institutes for the nano strip activated carbon that embodiment 4 provides
Show, constant current charge-discharge curve is as shown in Figure 7.Embodiment 1-3, the cyclic voltammetric of the 5 nano strip activated carbons provided and perseverance electricity
Flow charging and discharging curve respectively with Fig. 6,7 more approximate.The cyclic voltammetric and constant current charge-discharge curve of comparative example 1 respectively as Figure 10,
Shown in 11.Comparison diagram 6 and 7 and 10,11 understands that the cyclicity and charge-discharge performance of nano strip activated carbon of the embodiment of the present invention are steady
It is fixed.
In addition, calculating activated carbon specific surface area in BET methods, the specific surface area of the present embodiment nano strip activated carbon is
2291m2g-1, it is 1Ag in current density-1When specific capacitance be up to 317.8F g-1.And in comparative example 1 nano strip activated carbon ratio
Surface area is 2212m2g-1, but be 1Ag in current density-1When specific capacitance be only 102.8F g-1。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of nano strip activated carbon, includes the following steps：
Nano strip phenolic resin based polyalcohol is subjected to charing process, obtains carbide；
Mixed processing will be carried out with activator after the ground processing of the carbide, activation process is carried out at 800-850 DEG C；
The activation products of activated processing are subjected to carrying out washing treatment, until pH is 6-7.
2. preparation method according to claim 1, which is characterized in that the method for the charing process is as follows：In indifferent gas
Under body protection, phenolic resin based polyalcohol described in nano strip is warming up to 650-800 DEG C of progress charcoal with the rate of 2-5 DEG C/min
Change reaction.
3. preparation method according to claim 1, which is characterized in that the method for the charing process is as follows：In indifferent gas
Under body protection, phenolic resin based polyalcohol described in nano strip is warming up to 650 DEG C with the rate of 5 DEG C/min and carbonize instead
It should.
4. preparation method according to claim 1, which is characterized in that the method for the activation process is as follows：In indifferent gas
Under body protection, the mixture of the carbide and activator is first warming up to 400-450 DEG C with the rate of 3-5 DEG C/min,
30-60min is kept the temperature under conditions of 400-450 DEG C, then is warming up to 800-850 DEG C, 1- is kept the temperature under conditions of 800-850 DEG C
1.5h。
5. preparation method according to claim 1, which is characterized in that the method for the activation process is as follows：In indifferent gas
Under body protection, the mixture of the carbide and activator is first warming up to 400 DEG C with the rate of 5 DEG C/min, in 400 DEG C of item
30min is kept the temperature under part, then is warming up to 800 DEG C, 1h is kept the temperature under conditions of 800 DEG C.
6. according to any preparation methods of claim 1-5, it is characterised in that：The mass ratio of the carbide and activator
For 1:(1~5).
7. preparation method according to claim 6, it is characterised in that：The activator includes KOH, NaOH, K2CO3、K2O
At least one of.
8. a kind of nano strip activated carbon, it is characterised in that：The nano strip activated carbon is any described by claim 1-7
Preparation method prepares.
9. nano strip activated carbon according to claim 8, it is characterised in that：The specific surface of the nano strip activated carbon
Product is 2291m2g-1；Or/and
It is 1Ag in current density-1When specific capacitance be up to 317.8F g-1；Or/and
The average pore size of the nano strip activated carbon is 3.10nm.
10. the nano strip activated carbon prepared according to any preparation methods of claim 1-7 is in ultracapacitor, lithium ion
Application in battery, lithium-sulfur cell.
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| CN101613100A (en) * | 2008-06-25 | 2009-12-30 | 中国科学院大连化学物理研究所 | The biomass-based graphitized carbon and the microwave preparation of carbon-carbon composite |
| CN103950915A (en) * | 2014-04-16 | 2014-07-30 | 奇瑞汽车股份有限公司 | Carbon nanoribbon with large specific surface area and preparation method thereof |
| CN106365152A (en) * | 2016-08-31 | 2017-02-01 | 南通绿业中试技术研究院有限公司 | Preparation method of graphene nanosheet |
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| CN101613100A (en) * | 2008-06-25 | 2009-12-30 | 中国科学院大连化学物理研究所 | The biomass-based graphitized carbon and the microwave preparation of carbon-carbon composite |
| CN103950915A (en) * | 2014-04-16 | 2014-07-30 | 奇瑞汽车股份有限公司 | Carbon nanoribbon with large specific surface area and preparation method thereof |
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Application publication date: 20180525 |