CN110467182A - A kind of multi-stage porous carbon sill and its preparation method and application based on reaction template - Google Patents

A kind of multi-stage porous carbon sill and its preparation method and application based on reaction template Download PDF

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CN110467182A
CN110467182A CN201910844778.3A CN201910844778A CN110467182A CN 110467182 A CN110467182 A CN 110467182A CN 201910844778 A CN201910844778 A CN 201910844778A CN 110467182 A CN110467182 A CN 110467182A
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porous carbon
stage porous
reaction template
carbonate
hpc
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CN110467182B (en
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严祥辉
许皓
梁祯
薛同
蒙紫薇
房国丽
李东
沈宏芳
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North Minzu University
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/30Active carbon
    • C01B32/312Preparation
    • C01B32/318Preparation characterised by the starting materials
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/30Active carbon
    • C01B32/312Preparation
    • C01B32/342Preparation characterised by non-gaseous activating agents
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/30Active carbon
    • C01B32/312Preparation
    • C01B32/342Preparation characterised by non-gaseous activating agents
    • C01B32/348Metallic compounds
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/24Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/26Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/34Carbon-based characterised by carbonisation or activation of carbon
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88Processes of manufacture
    • H01M4/8825Methods for deposition of the catalytic active composition
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/96Carbon-based electrodes
    • 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
    • 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
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Abstract

The invention belongs to porous carbon sill of sheet technical fields, and in particular to a kind of multi-stage porous carbon sill and its preparation method and application based on reaction template.The multi-stage porous carbon sill based on reaction template mainly contains C and O element, degree of graphitization with higher, coral reef shape pattern and three-dimensional open-framework, and pore-size distribution is in 0.5~4.1nm, 0.94~1.28cm of Kong Rongwei3g‑1, specific surface area is 900~2000m2g‑1;The multi-stage porous carbon sill is that subcarbonate, carbon matrix precursor and carbonate are obtained by carbonization under solid phase mixing-inert gas shielding-acid processing-drying.The present invention serves not only as symmetrical electrode material for super capacitor specific capacitance height, high rate performance height, good cycling stability; high-efficient and lasting charge and discharge in the alkaline electrolyte can be achieved, and the cost of raw material is cheap, preparation method is simple controllably, processing step is flexible, is easy to large-scale production.

Description

A kind of multi-stage porous carbon sill and its preparation method and application based on reaction template
Technical field
The invention belongs to non-precious metal catalyst technical fields in electro-catalysis, and in particular to a kind of based on the more of reaction template Grade hole carbon-based material and preparation method thereof.
Background technique
Supercapacitor, be otherwise known as electrochemical capacitor.This new energy storage device not only has than traditional capacitor Higher energy density also has higher power density than battery, and comprehensive performance is between traditional electrolyte matter capacitor and electricity Between pond.It is filled largely, faster since the unique energy storage mode of supercapacitor can such as be stored within a very short time and be discharged Discharge rate and excellent cyclical stability will have very in terms of the intermittent pulses energy such as storage solar energy, wind energy Big application prospect, gains great popularity in recent years.Nevertheless, but due to the disadvantages of its energy density is low, potential section is relatively narrow, surpass Lithium battery can not be still substituted in the grade capacitor short time, supercapacitor and lithium battery are mainly complementary relationship at present.Thus Further increase super capacitor performance, reduce cost by be still supercapacitor research Main way.Supercapacitor is main It is made of electrode material, diaphragm and electrolyte, further to promote its performance, the research of electrode material is crucial.
Carbon material has both controllable aperture, bigger serface, excellent electric conductivity, good stability and cheap price The features such as, make it that there is very big application potential in new energy fields such as electrochemical capacitance, batteries.The preparation method of porous carbon at present It is broadly divided into two classes: template and activation method.General conventional template method such as uses silica material as sacrifice hard template The problems such as that there are apertures is single for the carbon material of preparation, and micro content is low, carbon material purity is low, complex process, and preparation cost is high, and For etching the acid or alkali of template, being not only hazardous to the human body also be can cause environmental pollution.And pass through common KOH activation method The carbon material of preparation there are aperture sizes it is small, yield is low the problems such as, and KOH have strong corrosivity.These disadvantages make porous The preparation of carbon material is very restricted, and is not easy large-scale production.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of multi-stage porous carbon substrate based on reaction template Material, the multi-stage porous carbon sill electrode material not only have high degree of graphitization, but also have micro--mesoporous hierarchical porous structure again With the specific surface area of superelevation.
It, should the second object of the present invention is to provide the preparation method of the multi-stage porous carbon sill based on reaction template Preparation method is simple controllably, the cost of raw material is cheap, processing step is flexible, is easy to large-scale production.
The present invention is achieved through the following technical solutions:
A kind of multi-stage porous carbon sill based on reaction template, the multi-stage porous carbon sill based on reaction template are main Containing C and O element, pore-size distribution is in 0.5~4.1nm, 0.94~1.28cm of Kong Rongwei3 g-1, specific surface area be 900~ 2000m2 g-1
The multi-stage porous carbon sill based on reaction template by carbon matrix precursor, subcarbonate and carbonate prepare and , the mass ratio between the carbon matrix precursor, subcarbonate and carbonate is 2:0.5~4:0.5~4.Wherein basic carbonate Salt and carbonate are respectively as reaction template and porous activator.
Preferably, the carbon matrix precursor be glucose, chitosan, methylcellulose, soluble starch, EDETATE SODIUM, One or more of NaFeEDTA sodium and ferric oxalate composition.
Preferably, the subcarbonate is in basic zinc carbonate, basic magnesium carbonate, basic nickel carbonate or basic carbonate iron One or more combination object.
Preferably, the carbonate is one or more of potassium carbonate, ammonium hydrogen carbonate or urea composition.
The preparation method of multi-stage porous carbon sill based on reaction template, includes the following steps:
1) carbon matrix precursor, subcarbonate, carbonate is taken to be filled by the hybrid mode of solid phase machinery according to the ratio The mixing divided, obtains solid powder A;
2) by A obtained in step 1) under slumpability gas shield, 600~1000 are warming up to 5 ± 2 DEG C/min DEG C keep 1~3h, then after cooled to room temperature grind uniformly, obtain catalyst precarsor B;If wherein heating rate is too slow Time is too long to be also required to more consume, and will lead to that sample vapors away before carbonization or structure is inhomogenous if too fast, therefore It is best using 5 ± 2 DEG C/min.The heat treatment process is carbonisation, and carbonization is carbon material in order to obtain, therefore carbonisation must It must must be inert gas, if it is reactivity gas, then will react in the high temperature process, or even cannot get required Sample.
3) catalyst precarsor B obtained in step 2) is first subjected to processing 1.0~for 24 hours with acidic aqueous solution, then into Row filters, is dry, finally obtains the carbon-based material for eliminating template and impurity, the i.e. multi-stage porous carbon based on reaction template Sill is labeled as HPC.
Preferably, in order to further improve pore structure, specific surface area and degree of graphitization.It will be obtained in step 3) HPC, in 180~220mL min-1Under flowing gas protection, 700~900 DEG C are warming up to 5 DEG C/min and keeps 0.5~3h, so Cooled to room temperature afterwards, the multi-stage porous carbon sill based on reaction template being further improved, this stage produce Product are labeled as HPC-HT2 (but obtained material is still HPC), primarily to the HPC with 3 is compared, are conducive to research The reason of leading to HPC structure.
Preferably, the carbon matrix precursor, subcarbonate, carbonate, which carry out adequately mixing, can be ultrasound in water Dispersion passes through solid phase mechanical mixture.Dispersion and subsequent filtering, drying and other steps wherein are carried out due to not needing solvent, so This hybrid mode of solid phase mechanical mixture is simpler, conveniently, it is economical.
Preferably, the slumpability gas is N in step 2)2Or He.
Preferably, being handled in step 3) with the aqueous solution of acid, acid is HCl, H in the acid processing2SO4Or HNO3It is molten One or more of liquid composition;Specifically: catalyst precarsor B is added to the water-soluble of the acid that mass fraction is 5~20% In liquid, 1.0 are stirred at 25~60 DEG C~for 24 hours, 3 times then are washed repeatedly with deionized water, are filtered, dry.Acid processing in acid into The preferred HCl of one step, acid concentration with mass fraction be 5~20% acid aqueous solution it is best, further preferred mass fraction be 8~ The aqueous solution of 12% acid because concentration is too low to remove unclean impurity under same volume, volume needed for concentration is too big with regard to small, Will lead to can not flood sample.
Preferably, the flowing gas is inert gas or active gases NH3;Wherein, using active gases NH3Purpose It is that can carry out Heteroatom doping and further pore.
The present invention use subcarbonate (basic zinc carbonate, basic magnesium carbonate, basic nickel carbonate or basic carbonate iron) for React hard template, it is therefore an objective to using its in the Zinc oxide particles decomposed at high temperature as hard template, in conjunction with activator carbon Hydrochlorate (potassium carbonate, ammonium hydrogen carbonate or urea) and acid processing etching hard template step, cut out with bigger serface it is micro-- Mesoporous multi-stage porous carbon sill, with coral reef shape pattern and three-dimensional open-framework.The pore-size distribution that the present invention obtains is 0.5 0.94~1.28cm of~4.1nm, Kong Rongwei3 g-1, specific surface area is 900~2000m2 g-1The multi-stage porous based on reaction template Carbon-based material is in coral reef shape pattern and three-dimensional open-framework (see figure l and Figure 11).Such micro/meso porous multi-stage porous, not only has Conducive to increase electron adsorption and electron transfer rate is improved, and double layer capacitor performance can be promoted, to further increase Performance of the supercapacitor.Select potassium carbonate replacement potassium hydroxide as activator or pore-foaming agent, it is therefore an objective to reduce reaction rate, mention High-carbon material yield, while the toxicity and corrosivity that avoid potassium hydroxide are to human body and the harm of environment bring and pollution;Benefit The degree of graphitization of carbon material can be further increased with secondary heat treatment and regulates and controls its hierarchical porous structure;To which collaboration has been provided The electrode material for super capacitor of excellent properties.
Multi-stage porous carbon sill in the present invention based on reaction template, scanning electron microscope test the result shows that, the carbon Material is porous spongy structure;It is 0.5~4.1nm that the analysis of isothermal nitrogen adsorption desorption, which measures its pore-size distribution, and specific surface area is 900~2000m2 g-1.A kind of above-mentioned multi-stage porous carbon sill based on reaction template is assembled into super electricity as electrode material Symmetrical two electrode system of container, test result show that when current density be 1A g-1When, specific capacitance value is 241F g-1, electric current is close Degree increases to 10A g-1When, specific capacitance value is 218F g-1, show good high rate performance;In constant current charge-discharge test condition Under, after circulation 10000 times, it is still able to maintain 98% or more of initial current density, shows there is good stable charge/discharge.
Compared with the prior art, the present invention has the following beneficial effects:
1) preparation process uses cheap and environmental-friendly various original materials;
2) preparation process is hard template using subcarbonate and combines acid processing, can effectively be created micro--mesoporous The hierarchical porous structure specific surface area big with acquisition, so as to increase available electron adsorption area and improve electron-transport speed Rate;
3) under alkaline condition and symmetrical two electrode test, which shows good high rate performance (90.5%) and stable charge/discharge (still keeping 98% or more after 10000 times);
4) the multi-stage porous carbon sill usage range is wide, and can be used as electrode material for super capacitor also will can serve as fuel electricity The cathodic oxygen reduction catalyst in pond.
Low raw-material cost needed for preparation process of the invention, safety and environmental protection, preparation process are simple, operation is controllable, yield Height is easy to large-scale production.Multi-stage porous carbon sill obtained based on reaction template has orderly classification and bigger serface, Solves the problems, such as to be currently applied to carbon material urgent need to resolve in supercapacitor.
Detailed description of the invention
Fig. 1 is the SEM photograph of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC).
Fig. 2 is the N of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC)2Suction/desorption isotherm.
Fig. 3 is the pore-size distribution of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC).
Fig. 4 is the wide-angle XRD spectra of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC).
Fig. 5 is the Raman spectrogram of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC).
Fig. 6 is that the XPS of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC) are composed entirely.
Fig. 7 is the cyclic voltammetry curve (room of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC) in 6M KOH Temperature sweeps fast 10mV s-1)。
Fig. 8 is the constant current charge-discharge curve of HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC) in 6M KOH (room temperature, 1A g-1)。
Fig. 9 is HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC) putting in 6M KOH, under difference current density Capacitor.
Figure 10 be HPC (G-BZC-PC), HPC (G-PC) and HPC (G-BZC) in 6M KOH cyclical stability (room temperature, 5A g-1, 10000 times).
Figure 11 is the TEM photo of HPC (G-BZC-PC).
Specific embodiment
The present invention is described in further detail With reference to embodiment, to help those skilled in the art's reason The solution present invention.
Embodiment 1
1) 2g glucose, 1g basic zinc carbonate are first taken, 1g potassium carbonate is added in agate mortar that carry out sufficient solid phase mixed It closes, obtains solid powder A;
2) by A obtained in step 1) in 200mL min-1Under slumpability gas shield, it is warming up to 5 DEG C/min 750 DEG C of holding 1.5h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 20h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC.
Embodiment 2
1) it first takes 1g EDETATE SODIUM, 1g basic magnesium carbonate, 1g potassium carbonate to be added in agate mortar and carries out sufficient solid phase Mixing, obtains solid powder A;
2) by A obtained in step 1) in 180mL min-1Under slumpability gas shield, it is warming up to 7 DEG C/min 800 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 12h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC;
Embodiment 3
1) it first takes 2g chitosan, 0.5g basic nickel carbonate, 2g potassium carbonate to be added in agate mortar and carries out sufficient solid phase Mixing, obtains solid powder A;
2) by A obtained in step 1) in 250mL min-1Under slumpability gas shield, it is warming up to 4 DEG C/min 1000 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 5h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC;
4) by HPC obtained in step 3), in 180mL min-1Flowing activity gas NH3Under protection, with 5 DEG C/min liter Temperature is to 900 DEG C and keeps 0.5h, then cooled to room temperature, and what is be further improved is described based on the more of reaction template Grade hole carbon-based material, this work-in-process are labeled as HPC-HT2.
Embodiment 4
1) 2g glucose, 1g basic zinc carbonate are first taken, 1g potassium carbonate is added in agate mortar that carry out sufficient solid phase mixed It closes, obtains solid powder A;
2) by A obtained in step 1) in 200mL min-1Under slumpability gas shield, it is warming up to 5 DEG C/min 800 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 12h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC;
4) by HPC obtained in step 3), in 200mL min-1Under flowing gas protection, 800 are warming up to 6 DEG C/min DEG C and keep 2h, then cooled to room temperature, the multi-stage porous based on reaction template being further improved are carbon-based Material, this work-in-process are labeled as HPC-HT2.
Embodiment 5
1) 2g glucose, 1g basic zinc carbonate are first taken, 1g potassium carbonate is added in agate mortar that carry out sufficient solid phase mixed It closes, obtains solid powder A;
2) by A obtained in step 1) in 200mL min-1Under slumpability gas shield, it is warming up to 5 DEG C/min 800 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 12h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC (G-BZC-PC), i.e., described one kind is based on The multi-stage porous carbon sill of reaction template, wherein G-BZC-PC is glucose (glucose), basic zinc carbonate (basic zinc ) and the english abbreviation of potassium carbonate (potassium carbonate) carbonate.
Embodiment 6
A kind of multi-stage porous carbon sill based on reaction template, is prepared by following methods:
Experimental procedure is same as Example 5, difference be in experimental procedure 3) after increase primary heat treatment, specifically: In 200mL min-1Under slumpability gas shield, 800 DEG C are warming up to 5 DEG C/min and keeps 1h, then naturally cools to room Temperature, this work-in-process are labeled as HPC-HT2 (G-BZC-PC), i.e. a kind of multi-stage porous carbon substrate based on reaction template Material.
Embodiment 7
A kind of multi-stage porous carbon sill based on reaction template, is prepared by following methods:
Experimental procedure is same as Example 5, and difference is in experimental procedure 1) in glucose is changed to chitosan, this stage Product labelling is HPC (C-BZC-PC), i.e. a kind of multi-stage porous carbon sill based on reaction template.
Embodiment 8
A kind of multi-stage porous carbon sill based on reaction template, is prepared by following methods:
Experimental procedure is same as Example 5, and difference is in experimental procedure 1) in glucose is changed to ferric oxalate, this stage Product labelling is HPC (FO-BZC-PC), i.e. a kind of multi-stage porous carbon sill based on reaction template.
In the embodiment of the present invention, unless otherwise instructed, used characterization and electro-chemical test means are this field Conventional technology.
Above-described embodiment, only presently preferred embodiments of the present invention, is not intended to limit the invention practical range, therefore all with this The equivalent change or modification that feature described in invention claim and principle are done should all be included in scope of the invention as claimed Within.
Comparative example 1
1) 2g glucose, 1g potassium carbonate are first taken, is added in agate mortar and carries out sufficient solid phase mixing, obtains solid powder Last A;
2) A obtained in step 1) is warming up under 200mL min-1 slumpability gas shield with 5 DEG C/min 800 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 12h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating impurity, being labeled as HPC (G-PC), wherein G-PC is glucose (glucose) With the english abbreviation of potassium carbonate (potassium carbonate).
This preparation process does not use basic zinc carbonate as reaction template, will be used as reference electrode material, and make with following Use basic zinc carbonate as hard template, while the electrode material for having used potassium carbonate to prepare is compared.
Comparative example 2
1) 2g glucose, 1g basic zinc carbonate are first taken, is added in agate mortar and carries out sufficient solid phase mixing, consolidate Body powders A;
2) by A obtained in step 1) in 200mL min-1Under slumpability gas shield, it is warming up to 5 DEG C/min 800 DEG C of holding 1h then grind uniformly after cooled to room temperature, obtain catalyst precarsor B;
3) aqueous solution of catalyst precarsor B acid obtained in step 2) is subjected to processing 12h in room temperature, finishes progress It filters, is dry, obtaining the carbon-based material for eliminating template and impurity, being labeled as HPC (G-BZC), wherein G-BZC is glucose (glucose) and the english abbreviation of basic zinc carbonate (basic zinc carbonate).
This preparation process has used basic zinc carbonate as reaction template, but potassium carbonate is not used to make activator, will The electrode for as reference electrode material, having used basic zinc carbonate as hard template with following, while potassium carbonate having been used to prepare Material is compared.
Performance test:
HPC (G-PC), the HPC (G-BZC) that the HPC (G-BZC-PC) and comparative example 1,2 that will implement 5 synthesis are synthesized SEM (scanning electron microscope), N2Suction/desorption isotherm and pore-size distribution, XRD, Raman and XPS analysis are respectively such as Fig. 1,2,3,4,5 Shown in 6.
A kind of multi-stage porous carbon sill based on reaction template that weighs prepared by 3mg comparative example 1,2 and embodiment 5 and right Product in the same old way are mixed with carbon black, PTFE in the ratio of 8:1:1 in ethanol, after mixing drop coating with acetone, deionized water, It on the dried foam nickel electrode that ethyl alcohol cleaned, is dried in vacuum overnight, then laminates in 10Mpa pushing, then assemble It is tested in 6M KOH at symmetrical two electrode system of supercapacitor.
HPC (G-PC), HPC (G-BZC) and the HPC (G-BZC-PC) that comparative example 1,2 and embodiment 5 synthesize are in 6M KOH Cyclic voltammetry curve, constant current charge-discharge curve, the discharge capacity under different current density and cyclical stability respectively as schemed 7, shown in 8,9 and 10.
The structural property parameter of multi-stage porous carbon sill of the table 1 based on reaction template
Specific capacitance of the table 2 based on the multi-stage porous carbon sill of reaction template in 6M KOH
HPC (G-PC), HPC (G-BZC) and the HPC (G-BZC-PC) that comparative example 1,2 and embodiment 5 synthesize are in 6M KOH Cyclic voltammetry curve, constant current charge-discharge curve, the discharge capacity curve under different current density and cyclical stability difference As shown in Fig. 7,8,9,10 and table 3.
Fig. 1,2,3 show HPC (G-PC), HPC (G-BZC) and the HPC (G-BZC- that comparative example 1,2 and embodiment 5 synthesize PC SEM, N)2Adsorption desorption curve and pore-size distribution are shown in conjunction with texture parameter in table 1 only with basic zinc carbonate for reaction Template is added without activator potassium hydroxide and can create the meso-hole structure of certain ordered degree, and activator hydroxide is used only The carbon-based material that potassium obtains mainly has big specific surface area simultaneously based on micropore, uses basic zinc carbonate for reaction when simultaneously Template, potassium hydroxide be activator when, can obtain it is a kind of based on reaction template micro--Jie's multi-stage porous (average pore size~ 0.55nm), high-specific surface area (1946m2 g-1) and Kong Rong (1.28cm3 g-1) spongy carbon-based material.Fig. 4,5 and 6 are shown The wide-angle XRD spectra of HPC (G-PC), HPC (G-BZC) and HPC (G-BZC-PC) that comparative example 1,2 and embodiment 5 synthesize, Raman spectrogram and XPS are composed entirely, it can be seen that these carbon-based materials degree of graphitization with higher only contains C and O element, says Reaction template basic zinc carbonate, activator potassium carbonate and oxide that they are generated during heat treatment is illustrated to be easy to lead to Peracid treatment all removes.In conjunction with the data of Fig. 1,2,3 and table 1, as a result demonstrates and use subcarbonate same for reaction template When by carbonate be activator, degree of graphitization with higher, micro--Jie's hierarchical porous structure, big Kong Rong can be cut out With the pure carbon-based material of specific surface area.
Fig. 7,8,9,10 and table 2 show HPC (G-PC), the HPC (G-BZC) that comparative example 1,2 and embodiment 5 synthesize and Chemical property of 3 samples of HPC (G-BZC-PC) in 6M KOH, as the result is shown they have good Electric double-layer capacitor, The HPC (G-BZC-PC) of high rate performance, especially embodiment 6 synthesis, specific capacitance, high rate performance and stable circulation performance are high respectively Up to 241.2F g-1(1A g-1), 90.5% (from 1A g-1To 10A g-1) and 98% or more (10000 circulations), disclose difference Using glucose, basic zinc carbonate and potassium carbonate as carbon matrix precursor, reaction template and activator, the HPC (G-BZC-PC) of acquisition has Micro--Jie's multi-stage porous for having, high specific surface area are conducive to increase the usable area of electron adsorption and improve electron transfer rate, from And promote the specific capacitance of electrode material;The HPC (G-PC) and HPC (G-BZC), HPC synthesized additionally by comparison comparative example 1,2 (G-BZC-PC) there is higher specific capacitance, high rate performance and cyclical stability, therefore under the preparation condition of optimization, have very much Superior electrode material for super capacitor has been provided in potentiality collaboration.

Claims (10)

1. a kind of multi-stage porous carbon sill based on reaction template, which is characterized in that the multi-stage porous carbon based on reaction template Sill mainly contains C and O element, and pore-size distribution is in 0.5~4.1nm, 0.94~1.28cm of Kong Rongwei3g-1, specific surface area is 900~2000m2g-1;The multi-stage porous carbon sill based on reaction template is by carbon matrix precursor, subcarbonate and carbonate system Standby and obtain, the mass ratio between the carbon matrix precursor, subcarbonate and carbonate is 2:0.5~4:0.5~4.
2. the multi-stage porous carbon sill based on reaction template as described in claim 1, which is characterized in that the carbon matrix precursor is One or more of glucose, chitosan, methylcellulose, soluble starch, EDETATE SODIUM, NaFeEDTA sodium and ferric oxalate group Close object.
3. the multi-stage porous carbon sill based on reaction template as described in claim 1, which is characterized in that the subcarbonate For one or more of basic zinc carbonate, basic magnesium carbonate, basic nickel carbonate or basic carbonate iron composition.
4. the multi-stage porous carbon sill based on reaction template as described in claim 1, which is characterized in that the carbonate is carbon One or more of sour potassium, ammonium hydrogen carbonate or urea composition.
5. the preparation method of the multi-stage porous carbon sill based on reaction template as described in any one of claim 1-4, It is characterized in that, includes the following steps:
1) it takes the carbon matrix precursor, subcarbonate, carbonate adequately to be mixed according to the ratio, obtains solid powder A;
2) by A obtained in step 1) under slumpability gas shield, 600~1000 DEG C of guarantors are warming up to 5 ± 2 DEG C/min 1~3h is held, is then ground uniformly after cooled to room temperature, obtains catalyst precarsor B;
3) catalyst precarsor B obtained in step 2) is first subjected to processing 1.0~for 24 hours with acidic aqueous solution, is then taken out Filter, drying finally obtain the carbon-based material for eliminating template and impurity, i.e. the multi-stage porous carbon substrate based on reaction template Material is labeled as HPC.
6. the preparation method of the multi-stage porous carbon sill based on reaction template as claimed in claim 5, which is characterized in that will walk It is rapid 3) in obtained HPC, in 180~220mL min-1Under flowing gas protection, 700~900 are warming up to 5 ± 2 DEG C/min DEG C and keep 0.5~3h, then cooled to room temperature, the multi-stage porous based on reaction template being further improved Carbon-based material, this work-in-process are labeled as HPC-HT2.
7. the preparation method of the multi-stage porous carbon sill based on reaction template as claimed in claim 5, which is characterized in that step 2) in, the slumpability gas is N2Or He.
8. the preparation method of the multi-stage porous carbon sill based on reaction template as claimed in claim 5, which is characterized in that step 3) it in, is handled with the aqueous solution of acid, acid is HCl, H in the acid processing2SO4Or HNO3One or more of solution group Close object;Specifically: catalyst precarsor B is added in the aqueous solution of acid that mass fraction is 5~20%, is stirred at 25~60 DEG C 1.0~for 24 hours, it then washed repeatedly 3 times, filtered, dry with deionized water.
9. the preparation method of the multi-stage porous carbon sill based on reaction template as claimed in claim 6, which is characterized in that described Flowing gas is inert gas or active gases NH3
10. the multi-stage porous carbon sill based on reaction template as described in any one of claim 1-4, which is characterized in that The multi-stage porous carbon sill based on reaction template is applied in supercapacitor.
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