CN105977499A - Preparation method of porous carbon electrode material - Google Patents
Preparation method of porous carbon electrode material Download PDFInfo
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- CN105977499A CN105977499A CN201610439447.8A CN201610439447A CN105977499A CN 105977499 A CN105977499 A CN 105977499A CN 201610439447 A CN201610439447 A CN 201610439447A CN 105977499 A CN105977499 A CN 105977499A
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 56
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000007772 electrode material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 7
- 239000000284 extract Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000003809 water extraction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 39
- 239000002994 raw material Substances 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005054 agglomeration Methods 0.000 abstract 2
- 230000002776 aggregation Effects 0.000 abstract 2
- 241000196324 Embryophyta Species 0.000 abstract 1
- 241000208125 Nicotiana Species 0.000 abstract 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract 1
- 238000003763 carbonization Methods 0.000 abstract 1
- 239000000376 reactant Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 10
- 239000003575 carbonaceous material Substances 0.000 description 8
- 239000010902 straw Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 239000000419 plant extract Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- LLYXJBROWQDVMI-UHFFFAOYSA-N 2-chloro-4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1Cl LLYXJBROWQDVMI-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/08—Hybrid cells; Manufacture thereof composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
-
- 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 preparation method of a porous carbon electrode material, and belongs to the field of preparation of new energy materials. The electrode material for a lithium-air battery, which is relatively small in particle size, uniform in granularity and free of agglomeration is prepared by microwave drying, carbonization and modified treatment of selected residues after tobacco stem extraction or other residues after plant extraction as raw materials. A reactant has the advantages that the raw materials are easy to obtain, the cost is low, the reaction conditions are easy to control, the yield of a product is high and the result repeatability is good; and the electrode material is of a porous structure, and is relatively small in particle size, uniform in granularity, large in specific surface area (946.85-1572.31m<2>/g) and free of agglomeration.
Description
Technical field
The present invention relates to the preparation method of a kind of porous carbon element electrode material, belong to new energy materials preparation field.
Background technology
Lithium-air battery (Li-air battery) is a kind of using lithium metal as negative pole, and air (or oxygen) is as positive pole, and a kind of metal-air cell that alkaline aqueous solution forms as electrolyte.During the electric discharge of this lithium-air battery, from the oxygen in air at air electrode (positive pole) surface reduction, form oxide or hydroxide.
As the positive pole of lithium-air battery, carbon air electrode has important impact to battery performance.Therefore, select a kind of suitable air electrode material and construct a kind of preferable loose structure to improve lithium-air battery performance extremely important.In conventional air electrode material, the carbon materials of high-specific surface area is the first-selection preparing air electrode, because high-ratio surface means can be that electrochemical reaction provides more active site, the biggest specific surface area also will provide to catalyst and more load site, be conducive to being uniformly distributed of catalyst, improve catalysis efficiency.
So far, air pole carbon materials remains one of focus of lithium-air battery research, is also difficult point.Have been investigated as the main active charcoal of carbon materials of lithium sky electrode material,
Vulcan XC-72、Super P、
Ketjen black, carbon nano-fiber, CNT, Graphene or the material with carbon element that it is modified.The actual capacity that the material of air electrode and structures shape battery can be released, meanwhile, also contributes to the performance of the aspects such as the power density of battery, charge efficiency, service life cycle, is one of the key components of battery.Owing to CNT/carbon materials such as line, Graphene has excellent electric conductivity, preferable chemical inertness, there is high specific surface area, thus be that to prepare the air electrode of lithium-air battery preferred, because high specific surface area means can be that electrochemical reaction provides more reactivity site, but these materials itself and method of modifying thereof are complicated, relatively costly, and experiment condition requires height, it is unfavorable for commercial applications, still can not meet the lithium-air battery requirement to material.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of porous carbon element electrode material, specifically include following steps:
(1) after being extracted by cabo, residue carries out microwave treatment, and the condition of described microwave treatment is microwave power 350～550W, and microwave treatment time is 5～20min, and after then being extracted by the cabo after microwave treatment, residue is dried to constant weight at 70～110 DEG C；
(2) after extracting in step (1) gained cabo, with mass ratio as 1:1～medicinal residues after Chinese medicine extraction are mixed homogeneously by the ratio of 1:6 with modifying agent for residue and modifying agent, and described modifying agent is KOH, K2CO3、H3PO4In one, be then placed in tube furnace being modified process and obtain residue after modified cabo extracts；
(3) after modified cabo extraction step (2) obtained, residue concentration is the HCl cleaning of 5～15%, then is neutral with distilled water cleaning to pH value, finally dries to constant weight, i.e. obtains porous carbon element electrode material.
Preferably, after cabo of the present invention extracts, residue is cabo residue after water extraction or alcohol extraction.
Preferably, step of the present invention (2) described modifying process is: be placed in tube furnace by sample, by the heating rate of 0.5 ~ 1 DEG C/min, temperature is risen to 180 ~ 200 DEG C, is incubated 120 ~ 180min；Then, in stove, it is continually fed into argon and is warming up to 650～850 DEG C with the heating rate of 5 ~ 10 DEG C/min, furnace cooling after insulation 30～120min.
Preferably, step of the present invention (3) described drying course is: dry to constant weight at 70～110 DEG C.
After in the method for the invention, cabo extracts, residue may be replaced by other plant residue；Wherein, the residue that one or more during other plant residue refers to the root of plant, stem, leaf are filtrated to get after soaking 1～5h by the ratios with water that solid-liquid ratio is 1:5～1:15 or alcohol.
The principle of the present invention: after residue or other plant extract after extracting with cabo, residue is as raw material, the structure organization of extracted rear residue self is more loose, it is easy to erosion and the profit of activator, thus can obtain substantial amounts of loose structure in modifying process, and the size of the particle of the porous carbon material of preparation is compared with little, epigranular, the big (946.85 ~ 1572.31m of specific surface area2/ g), soilless sticking.Because high specific surface area means can be that electrochemical reaction provides more reactivity site, thus obtains preferable chemical property.
Beneficial effects of the present invention: the present invention has raw material and is easy to get, with low cost, reacts simple and easy to control, and result repeats；The porous carbon of preparation is high purity carbon material, has that particle size is little, epigranular, specific surface area big (946.85
~1572.31m2/ g), the advantage such as soilless sticking.This highly purified carbon materials being applied in lithium-air battery to do air electrode material be assembled into lithium-air battery and carry out constant current charge-discharge test, electric current density is 50mA.g-1Time first discharge specific capacity reach 5176mAh g-1, according to consulting reference materials, this specific capacity is approximately CNT under same current density 6.9 times of first discharge specific capacity.The present invention is that after extracting cabo, residue or other plant extract the recycling of residue, thus preferably achieves effectively making full use of of residue after residue or other plant extract after cabo extracts.
Accompanying drawing explanation
Fig. 1 is SEM surface topography and the EDS elementary analysis of the carbon pole material that embodiment 1 prepares；
Fig. 2 is the pore-size distribution situation of the carbon pole material that embodiment 1 prepares；
Fig. 3 is the discharge curve first of the carbon pole material that embodiment 1 prepares.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further details below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to described content.
Embodiment 1
The residue method of preparing lithium-air battery porous carbon element electrode material after extracting with cabo described in the present embodiment, specifically includes following steps:
(1) after being extracted by cabo, residue carries out microwave treatment, microwave power 450W, and microwave treatment time is 10min, and after then being extracted by the cabo after microwave treatment, residue is dried to constant weight at 70 DEG C.
(2) material after drying with the ratio that solid KOH mass ratio is 1:4 in the material after drying is put into after uniformly mixing with solid KOH and is modified in tube furnace processing.
(3) during modification, by the heating rate of 1 DEG C/min, temperature is risen to 200 DEG C, be incubated 120min；Then, in stove, it is continually fed into argon and is warming up to 750 DEG C with the heating rate of 10 DEG C/min, furnace cooling after insulation 30min.
(4) HCl that material concentration obtained above is 10% is cleaned, then be neutral with distilled water cleaning to pH value, finally dry to constant weight at 70 DEG C, i.e. obtain porous carbon element electrode material.
SEM surface topography and the EDS elementary analysis of carbon pole material described in the present embodiment as it is shown in figure 1, it can be seen that carbon pole material be spherical, particle diameter about 10 μm, grain shape is complete；Except minimal amount of negligible O element, remaining all C element from elementary analysis figure it can be seen that in material, purity is the highest, shows that this material is carbon materials.The pore radius distribution situation of carbon pole material is as in figure 2 it is shown, it can be seen that the aperture of this electrode material is mainly distributed between 6～13nm nm, this electrode material has meso-hole structure. and the discharge curve first of carbon pole material is as shown in Figure 3；As seen from the figure at 50mA.g-1Electric current density under, electrode material first discharge specific capacity reaches 5100mAh.g-1Above.
Contrast test；Other conditions are identical with the present embodiment, and difference is that the cabo processed with un-extracted is for raw material to prepare porous carbon element electrode material.By preparing carbon pole materials application in the air electrode of lithium-air battery, it is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity is 1100mAh.g-1。
Embodiment 2
The residue method of preparing lithium-air battery porous carbon element electrode material after extracting with cabo described in the present embodiment, specifically includes following steps:
(1) after being extracted by cabo, residue carries out microwave treatment, microwave power 350W, and microwave treatment time is 5min, and after then being extracted by the cabo after microwave treatment, residue is dried to constant weight at 110 DEG C.
(2) by the material after drying and solid H3PO4Mass ratio is material and the solid H after the ratio of 1:2 will be dried3PO4Uniformly put into after mixing and tube furnace is modified process.
(3) during modification, by the heating rate of 0.5 DEG C/min, temperature is risen to 180 DEG C, be incubated 150min；Then, in stove, it is continually fed into argon and is warming up to 650 DEG C with the heating rate of 5 DEG C/min, furnace cooling after insulation 50min.
(4) HCl that material concentration obtained above is 5% is cleaned, then be neutral with distilled water cleaning to pH value, finally dry to constant weight at 90 DEG C, i.e. obtain porous carbon element electrode material.
The carbon pole material that the present embodiment prepares possesses loose structure, is applied in the air electrode of lithium-air battery, is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity reaches 2000mAh.g-1Above.
Contrast test；Other conditions are identical with the present embodiment, and difference is that the cabo processed with un-extracted is for raw material to prepare porous carbon element electrode material.By preparing carbon pole materials application in the air electrode of lithium-air battery, it is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity is 1200Ah.g-1。
Embodiment 3
The residue method of preparing porous carbon element electrode material after extracting with cabo described in the present embodiment, specifically includes following steps:
(1) after being extracted by cabo, residue carries out microwave treatment, microwave power 550W, and microwave treatment time is 15min, and after then being extracted by the cabo after microwave treatment, residue is dried to constant weight at 70 DEG C.
(2) by the material after drying and solid K2CO3Mass ratio is material and the solid K after the ratio of 1:2 will be dried2CO3Uniformly put into after mixing and tube furnace is modified process.
(3) during modification, by the heating rate of 1 DEG C/min, temperature is risen to 200 DEG C, be incubated 180min；Then, in stove, it is continually fed into argon and is warming up to 650 DEG C with the heating rate of 5 DEG C/min, furnace cooling after insulation 90min.
(4) HCl that material concentration obtained above is 5% is cleaned, then be neutral with distilled water cleaning to pH value, finally dry to constant weight at 110 DEG C, i.e. obtain porous carbon element electrode material.
The carbon pole material that the present embodiment prepares possesses loose structure.It is applied in the air electrode of lithium-air battery, is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity reaches 1800mAh.g-1Above.
Contrast test；Other conditions are identical with the present embodiment, and difference is that the cabo processed with un-extracted is for raw material to prepare porous carbon element electrode material.By preparing carbon pole materials application in the air electrode of lithium-air battery, it is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity is 1000mAh.g-1。
Embodiment 4
The residue method of preparing porous carbon element electrode material after extracting with Caulis et Folium Oryzae described in the present embodiment, specifically includes following steps:
(1) it is filtrated to get Caulis et Folium Oryzae residue after Caulis et Folium Oryzae being soaked 2h with alcohol at normal temperatures according to the ratio that solid-liquid ratio is 1:13；
(2) Caulis et Folium Oryzae residue carrying out microwave treatment, microwave power 350W, microwave treatment time is 5min, and after then being extracted by the Caulis et Folium Oryzae after microwave treatment, residue is dried to constant weight at 110 DEG C.
(3) by the material after drying and solid H3PO4Mass ratio is material and the solid H after the ratio of 1:3 will be dried3PO4Uniformly put into after mixing and tube furnace is modified process.
(4) during modification, by the heating rate of 0.5 DEG C/min, temperature is risen to 180 DEG C, be incubated 150min；Then, in stove, it is continually fed into argon and is warming up to 650 DEG C with the heating rate of 5 DEG C/min, furnace cooling after insulation 50min.
(5) HCl that material concentration obtained above is 5% is cleaned, then be neutral with distilled water cleaning to pH value, finally dry to constant weight at 90 DEG C, i.e. obtain porous carbon element electrode material.
The carbon pole material that the present embodiment prepares possesses loose structure.It is applied in the air electrode of lithium-air battery, is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity reaches 2000mAh.g-1Above.
Contrast test；Other conditions are identical with the present embodiment, and it is that raw material is to prepare porous carbon element electrode material that difference is with the Caulis et Folium Oryzae processed without step (1).By preparing carbon pole materials application in the air electrode of lithium-air battery, it is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity is 1100mAh.g-1。
Embodiment 5
The residue method of preparing porous carbon element electrode material after extracting with straw described in the present embodiment, specifically includes following steps:
(1) straw is soaked in water after 5h at normal temperatures according to the ratio that solid-liquid ratio is 1:8 it is filtrated to get straw residue；
(2) straw residue carrying out microwave treatment, microwave power 550W, microwave treatment time is 15min, and after then being extracted by the straw after microwave treatment, residue is dried to constant weight at 70 DEG C.
(3) by the material after drying and solid K2CO3Mass ratio is material and the solid K after the ratio of 1:6 will be dried2CO3Uniformly put into after mixing and tube furnace is modified process.
(4) during modification, by the heating rate of 1 DEG C/min, temperature is risen to 200 DEG C, be incubated 180min；Then, in stove, it is continually fed into argon and is warming up to 650 DEG C with the heating rate of 5 DEG C/min, furnace cooling after insulation 90min.
(5) HCl that material concentration obtained above is 5% is cleaned, then be neutral with distilled water cleaning to pH value, finally dry to constant weight at 110 DEG C, i.e. obtain porous carbon element electrode material.
The carbon pole material that the present embodiment prepares possesses loose structure.It is applied in the air electrode of lithium-air battery, is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity reaches 1800mAh.g-1Above.
Contrast test；Other conditions are identical with the present embodiment, and it is that raw material is to prepare porous carbon element electrode material that difference is with the straw processed without step (1).By preparing carbon pole materials application in the air electrode of lithium-air battery, it is 100mA.g in electric current density-1Electric current density under, electrode material first discharge specific capacity is 1150mAh.g-1。
Claims (5)
1. the preparation method of a porous carbon element electrode material, it is characterised in that specifically include following steps:
(1) after being extracted by cabo, residue carries out microwave treatment, and the condition of described microwave treatment is microwave power 350～550W, and microwave treatment time is 5～20min, and after then being extracted by the cabo after microwave treatment, residue is dried to constant weight at 70～110 DEG C；
(2) after extracting in step (1) gained cabo, with mass ratio as 1:1～medicinal residues after Chinese medicine extraction are mixed homogeneously by the ratio of 1:6 with modifying agent for residue and modifying agent, and described modifying agent is KOH, K2CO3、H3PO4In one, be then placed in tube furnace being modified process and obtain residue after modified cabo extracts；
(3) after modified cabo extraction step (2) obtained, residue concentration is the HCl cleaning of 5～15%, then is neutral with distilled water cleaning to pH value, finally dries to constant weight, i.e. obtains porous carbon element electrode material.
The preparation method of porous carbon element electrode material the most according to claim 1, it is characterised in that: after described cabo extracts, residue is cabo residue after water extraction or alcohol extraction.
The preparation method of porous carbon element electrode material the most according to claim 1, it is characterised in that: step (2) described modifying process is: be placed in tube furnace by sample, by the heating rate of 0.5 ~ 1 DEG C/min, temperature is risen to 180 ~ 200 DEG C, is incubated 120 ~ 180min；Then, in stove, it is continually fed into argon and is warming up to 650～850 DEG C with the heating rate of 5 ~ 10 DEG C/min, furnace cooling after insulation 30～120min.
The preparation method of porous carbon element electrode material the most according to claim 1, it is characterised in that: step (3) described drying course is: dry to constant weight at 70～110 DEG C.
5. according to the preparation method of porous carbon element electrode material described in any one in claim 1 ~ 4, it is characterised in that: after cabo extracts, residue replaces with other plant residue；Wherein, the residue that one or more during other plant residue refers to the root of plant, stem, leaf are filtrated to get after soaking 1～5h by the ratios with water that solid-liquid ratio is 1:5～1:15 or alcohol.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106299384A (en) * | 2016-10-14 | 2017-01-04 | 北京理工大学 | A kind of lithium sky anode electrode slice based on charcoal |
| CN107681230A (en) * | 2017-08-18 | 2018-02-09 | 中国科学院合肥物质科学研究院 | A kind of zinc-air battery and its application |
| CN107902638A (en) * | 2017-12-05 | 2018-04-13 | 湖南景程电子科技有限公司 | A kind of energy-saving constant-temperature carbon method for cooking |
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| 夏洪应: "微波加热典型物料制备高比表面积活性炭及演变机制", 《中国博士学位论文全文数据库工程科技Ⅰ辑》 * |
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| CN106299384B (en) * | 2016-10-14 | 2020-01-10 | 北京理工大学 | Lithium-air battery positive electrode plate based on biochar |
| CN107681230A (en) * | 2017-08-18 | 2018-02-09 | 中国科学院合肥物质科学研究院 | A kind of zinc-air battery and its application |
| CN107902638A (en) * | 2017-12-05 | 2018-04-13 | 湖南景程电子科技有限公司 | A kind of energy-saving constant-temperature carbon method for cooking |
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