CN115744900A - Preparation method and application of biomass activated carbon-based electrode material - Google Patents
Preparation method and application of biomass activated carbon-based electrode material Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000007772 electrode material Substances 0.000 title claims abstract description 59
- 239000002028 Biomass Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 240000008042 Zea mays Species 0.000 claims abstract description 38
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 38
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 38
- 235000005822 corn Nutrition 0.000 claims abstract description 38
- 239000010902 straw Substances 0.000 claims abstract description 38
- 238000001035 drying Methods 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000008367 deionised water Substances 0.000 claims abstract description 18
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 8
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- 230000003213 activating effect Effects 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000003575 carbonaceous material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000006230 acetylene black Substances 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
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- 230000008901 benefit Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 17
- 239000003610 charcoal Substances 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
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- 239000011148 porous material Substances 0.000 description 6
- 230000001351 cycling effect Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000005087 graphitization Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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Abstract
The invention discloses a preparation method of a biomass activated carbon-based electrode material, which specifically comprises the following steps: washing the raw material of the corn straw powder by deionized water, drying, grinding and sieving to obtain clean corn straw powder; KOH and FeCl 3 Dissolving in deionized water to obtain KOH and FeCl 3 Mixing the solution, adding the obtained clean corn straw powder into the mixed solution, and fully stirring to form a uniform mixture; adding KMnO into the solution 4 Continuously stirring the powder, uniformly stirring, pouring into a culture dish, and drying in a drying oven; drying the obtained productGrinding thoroughly and sieving in N 2 Calcining and activating in a tubular furnace under the atmosphere, and cooling to room temperature after reaction to obtain a corn straw-based porous carbon primary product; washing the obtained initial product with dilute hydrochloric acid, then washing with deionized water to neutrality, drying and sieving to obtain the biomass activated carbon-based electrode material. The biomass activated carbon-based electrode material provided by the invention is used as a high-performance supercapacitor electrode material, and has the advantages of high specific capacity and good circulation stability.
Description
Technical Field
The invention belongs to the technical field of preparation of electrode materials of super capacitors, relates to preparation of a high-performance electrode material of a super capacitor, and particularly relates to a preparation method and application of a biomass activated carbon-based electrode material.
Background
With the increasing consumption of petroleum resources, biomass is favored and regarded as a renewable energy source with abundant reserves in the nature, and has the potential of being used as an alternative energy source. China is a large country in agricultural production, biomass resources are extremely rich, most of agriculture and forestry biomass is directly abandoned or burned at present, a large amount of greenhouse gases are generated, and serious environmental pollution is caused, so that people have continuously and widely researched and explored, a plurality of electric energy storage technologies are developed so far, some of the electric energy storage technologies are often used in daily life, such as traditional batteries and fuel cells, and other super capacitors are more applied to the industrial aspect, and the super capacitors comprise super capacitors and the like, and are novel energy storage devices with high power density and long cycle life. Compared with the traditional capacitor, the super capacitor has larger specific capacity and higher energy density; compared with a battery, the super capacitor can realize quick charge and discharge under high power. Therefore, the super capacitor is widely applied to the fields of aerospace, electronic instruments, transportation, actual production and life and the like.
The performance of a supercapacitor is greatly affected by the electrode material. The carbon material has the characteristics of good conductivity, stable mechanism, large energy density, small pollution and the like, and is widely applied to electrode materials of high-performance super capacitors. In recent years, the use of renewable resources (particularly, agricultural and forestry biomass resources) for the production of carbon materials has received much attention. China is one of the world's agricultural production countries and has a huge reserve of agricultural and forestry wastes. The carbon material is prepared by effectively utilizing the agricultural and forestry wastes and is used as the electrode material of the super capacitor, so that the problem of energy shortage is solved, the waste of resources is avoided, and great benefit is brought to the development of ecological agriculture. The corn straw resource is stored in China in an extremely rich amount, and according to statistics, the amount of the corn straw discarded every year can reach more than 3.0 hundred million tons. The prior treatment of the corn straw powder has the problems of waste and pollution. The waste corn straw powder is reasonably utilized, so that the environmental problems caused by burning can be reduced, and the green development concept in the new era environment is met. The application of the corn straw powder to the preparation of the electrode material is not reported.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method and application of a biomass activated carbon-based electrode material 4 Providing activation and MnO template, KOH for activating, feCl 3 The biomass active carbon-based electrode material is a graphitization catalyst, is used as a high-performance supercapacitor electrode material, and has high specific capacity and good circulation stability.
The invention is realized by the following technical scheme:
a preparation method of a biomass activated carbon-based electrode material comprises the following steps:
step 1: washing the raw material of the corn straw powder by deionized water, drying, grinding and screening by a 60-mesh screen to obtain clean corn straw powder;
and 2, step: KOH and FeCl 3 Dissolving in deionized water to obtain KOH and FeCl 3 Mixing the solution, namely adding the clean corn straw powder obtained in the step (1) into the mixed solution, and fully stirring to form a uniform mixture;
and step 3: adding KMnO into the solution 4 Continuously stirring the powder, uniformly stirring, pouring into a culture dish, and drying in a drying oven;
and 4, step 4: the dried product of step 3 was ground thoroughly and sieved through a 60 mesh screen before being placed in an atmospheric tube furnace under N 2 Calcining and activating in the atmosphere, and cooling to room temperature after reaction to obtain a corn straw based porous carbon primary product;
and 5: washing the initial product obtained in the step 4 with dilute hydrochloric acid, repeatedly washing with deionized water to make the initial product neutral, drying, and sieving to obtain the corn straw-based porous carbon material, namely the biomass activated carbon-based electrode material.
The invention further improves the scheme as follows:
the drying temperature in the step 1 is 105 ℃, and the drying time is 12 hours.
Further, KOH and FeCl are added in the step 2 3 And the mass ratio of the clean corn straw powder is 1.
Further, KOH and FeCl are added in the step 2 3 And the mass ratio of the clean corn straw powder is 1.
Further, KMnO in step 3 4 The mass ratio of the powder to the clean corn straw powder is 1.
Further, in the step 3, the mixing and stirring time is 6-12 hours, the drying temperature is 80-120 ℃, and the drying time is 12-24 hours.
Furthermore, the calcining activation temperature in the step 4 is 600-900 ℃, and the time is 1-3 hours.
Further, the concentration of the dilute hydrochloric acid in the step 5 is 1mol/L, wherein the molar ratio of HCl to KOH in the previous step is 1.2.
The invention further improves the scheme as follows:
an application of a biomass activated carbon-based electrode material in preparing a super capacitor electrode.
Further, the specific process of application is as follows: grinding the biomass activated carbon-based electrode material to 200 meshes, mixing the ground biomass activated carbon-based electrode material with acetylene black and PTFE in a mortar according to the mass ratio of 8.
Compared with the prior art, the invention has the beneficial effects that:
the invention takes corn straw powder as a carbon source and KMnO 4 Providing activated and MnO template, KOH as activator, feCl 3 The high-performance supercapacitor electrode material is prepared by using a graphitization catalyst, and a large number of mesoporous and microporous pore channels are generated on the basis of an originally developed pore structure of the electrode material. The method has the characteristics of simple preparation steps, low cost of raw materials and processes, large specific surface area of the prepared electrode material, strong conductivity, high specific capacitance, stable structure, strong response capability to high current density and the like.
1. The invention uses KMnO 4 The MnO template is provided while the activation is carried out, the prepared carbon material has a high specific surface area and a developed pore structure, the prepared biomass carbon-based supercapacitor electrode material has a large number of micropores to realize the efficient adsorption of ions, and the mesoporous pore channels strengthen the rapid transmission of the ions, so that a mutually communicated and layered three-dimensional porous frame structure is obtained;
2. at the same time in KMnO 4 Under the etching action of KOH, mutually communicated pore channels are formed, the migration path is shortened, the migration rate of electrolyte ions in pore channels is greatly improved, the charge-discharge time of the capacitor is further shortened, the charge storage capacity and the energy density of the carbon-based capacitor are improved, and the specific capacitance of an electrode material is also effectively improved;
3. the invention adopts FeCl 3 The porous carbon material prepared for the graphitization catalyst also has gain on the specific surface areaThe effect is that the graphitization degree and the crystallization performance of the carbon material are improved, and the stability of the carbon skeleton is increased, so that the advantages of high specific capacitance, stable charge and discharge chemical properties, stable cycle stability and the like are obtained.
Drawings
FIG. 1 is a CV diagram of the biomass charcoal-based electrode material prepared in example 2 at different scanning rates;
FIG. 2 is a GCD curve of the biomass charcoal-based electrode material prepared in example 1 at different current densities;
FIG. 3 is a GCD curve of the biomass charcoal-based electrode material prepared in example 2 under different current densities;
FIG. 4 is a GCD curve of the biomass charcoal-based electrode material prepared in example 3 under different current densities;
FIG. 5 is a graph of the cycling stability of the biochar-based electrode material prepared in example 2 at a current density of 10A/g.
Detailed Description
The present invention will now be described in detail with reference to specific embodiments.
Example 1
1, washing a proper amount of corn straw powder raw materials by deionized water, drying at 105 ℃ for 12 hours, grinding the dried materials, and screening by a 60-mesh screen to obtain clean corn straw powder; 2 separately adding 5 g of KOH and FeCl 3 Dissolving the corn straw powder in 150ml of deionized water, and fully stirring to form a uniform mixture solution; 3 to the above mixture solution was added 2.5 g of KMnO 4 Continuously stirring the powder for 10 hours, pouring the mixed solution into a culture dish, and drying the mixed solution in a drying oven at 105 ℃ for 12 hours; 4 the dried product was ground thoroughly and sieved through a 60 mesh sieve before being placed in an atmospheric tube furnace under N 2 Calcining and activating for 2 hours at 750 ℃ in a tubular furnace under the atmosphere, and cooling to room temperature after reaction to obtain a corn straw based porous carbon primary product; 5 taking out the initial product, grinding, crushing, pouring 167mL of hydrochloric acid (1 mol. L) -1 ) Magnetically stirring for 6 hours, then carrying out suction filtration on the solution, adding deionized water for multiple times, washing to be neutral, drying, and sieving by a 200-mesh sieve to obtain clean biomass activated carbon-based electrolyteA pole material; 6, mixing the biomass activated carbon-based electrode material acetylene black and PTFE =8 in a mortar in a mass ratio of 1. Applying about 5mg of the mixture to 1cm 2 And tabletting for 2 minutes on the foamed nickel under the pressure of 10MPa, and drying to obtain the biomass carbon-based electrode material.
Example 2
1, washing a proper amount of corn straw powder raw materials by deionized water, drying at 105 ℃ for 12 hours, grinding the dried materials, and then screening the ground materials by a 60-mesh screen to obtain clean corn straw powder; 2 separately adding 5 g of KOH and FeCl 3 Dissolving the corn straw powder in 150ml of deionized water, and fully stirring to form a uniform mixture solution; 3 to the above mixture solution was added 5 g of KMnO 4 Continuously stirring the powder for 10 hours, pouring the mixed solution into a culture dish, and drying the mixed solution in a drying oven at 105 ℃ for 12 hours; 4 the dried product was ground thoroughly and sieved through a 60 mesh sieve before being placed in an atmospheric tube furnace under N 2 Calcining and activating for 2 hours at 750 ℃ in a tubular furnace under the atmosphere, and cooling to room temperature after reaction to obtain a corn straw-based porous carbon primary product; 5 taking out the initial product, grinding, crushing, pouring 167mL of hydrochloric acid (1 mol. L) -1 ) Magnetically stirring for 6 hours, then carrying out suction filtration on the solution for multiple times, adding deionized water, washing to be neutral, drying, and sieving with a 200-mesh sieve to obtain a clean biomass activated carbon-based electrode material; 6, mixing the biomass activated carbon-based electrode material acetylene black and PTFE =8 in a mortar in a mass ratio of 1. Applying about 5mg of the mixture to 1cm 2 And tabletting for 2 minutes on the foamed nickel under the pressure of 10MPa, and drying to obtain the biomass carbon-based electrode material.
Example 3
1, washing a proper amount of corn straw powder raw materials by deionized water, drying at 105 ℃ for 12 hours, grinding the dried materials, and screening by a 60-mesh screen to obtain clean corn straw powder; 2 separately adding 5 g of KOH and FeCl 3 Dissolving the corn straw powder in 150ml of deionized water, and fully stirring to form a uniform mixture solution; 3 to the above mixture solution was added 7.5 g of KMnO 4 Stirring the powder for 10 hours, and pouring the mixed solutionPlacing into a culture dish, and drying in a drying oven at 105 ℃ for 12 hours; 4 the dried product was ground thoroughly and sieved through a 60 mesh sieve before being placed in an atmospheric tube furnace under N 2 Calcining and activating for 2 hours at 750 ℃ in a tubular furnace under the atmosphere, and cooling to room temperature after reaction to obtain a corn straw-based porous carbon primary product; 5 taking out the initial product, grinding, crushing, pouring 167mL of hydrochloric acid (1 mol. L) -1 ) Magnetically stirring for 6 hours, then carrying out suction filtration on the solution, adding deionized water for multiple times, washing to be neutral, drying, and sieving with a 200-mesh sieve to obtain a clean biomass activated carbon-based electrode material; 6, mixing the biomass activated carbon-based electrode material acetylene black and PTFE =8 in a mortar in a mass ratio of 1, and adding ethanol to mix uniformly. Applying about 5mg of the mixture to 1cm 2 And tabletting for 2 minutes on the foamed nickel under the pressure of 10MPa, and drying to obtain the biomass carbon-based electrode material.
Performance detection
The biomass carbon-based electrode materials prepared in examples 1 to 3 were subjected to electrochemical testing on an electrode sheet using a CS electrochemical workstation, and the prepared electrodes were used as working electrodes and platinum sheet electrodes (2 cm) 2 ) For the counter electrode, the Hg/HgO electrode was used as a reference electrode and electrochemical tests were performed in a three-electrode system with 6M KOH aqueous solution. The potential window ranges from-1 to 0V, constant current discharge at different current densities, according to the specific capacitance calculation formula Cs = I Δ t/(m × Δ V). Wherein Cs is the mass specific capacitance of the sample, and the unit is F/g; i is current in mA; Δ t is the discharge time in units of s; m is the loading of active substances on the electrode sheet, and the unit is mg; Δ V is the discharge drop in V.
The results obtained were as follows:
FIG. 1 is a CV curve diagram of the biomass charcoal-based electrode material prepared in example 2 at different scanning rates, wherein the CV curve shows a good rectangle at 2-100 mV. S -1 The scanning speed of the method has no obvious deformation, and the specific capacitance of the prepared carbon material mainly comes from the double electric layer capacitance;
FIG. 2 is a GCD curve chart of the biomass charcoal-based electrode material prepared in example 1 under different current densities, and the specific capacitances are 288.8F/g, 268.8F/g, 251.8F/g, 233.35F/g and 216.3F/g respectively under the current densities of 0.5A/g, 1A/g, 2A/g, 5A/g and 10A/g by calculation; when the current density is increased from 1A/g to 10A/g, the specific capacitance retention rate of the electrode of the super capacitor prepared by the invention is up to 74.9 percent;
FIG. 3 is a GCD curve of the biomass charcoal-based electrode material prepared in example 2 under different current densities, wherein the GCD curve is in a good isosceles triangle shape, which shows that the internal resistance of the material is small, and the specific capacitances are respectively 305.3F/g, 275.8F/g, 259.2F/g, 244F/g and 233.3F/g under current densities of 0.5A/g, 1A/g, 2A/g, 5A/g and 10A/g; when the current density is increased from 1A/g to 10A/g, the specific capacitance retention rate of the electrode of the super capacitor prepared by the invention is up to 76.4%;
FIG. 4 is a GCD curve chart of the biomass charcoal-based electrode material prepared in example 3 under different current densities, and the GCD curve is in a better isosceles triangle shape, and the specific capacitances are calculated to be 201.35F/g, 181.7F/g, 169.94F/g, 158.15F/g and 149F/g under the current densities of 0.5A/g, 1A/g, 2A/g, 5A/g and 10A/g respectively; when the current density is increased from 1A/g to 10A/g, the specific capacitance retention rate of the electrode of the super capacitor prepared by the invention is up to 74 percent;
FIG. 5 is a graph of the cycling stability of the biomass charcoal-based electrode material prepared in example 2 at a current density of 10A/g, and the electrode material tested by constant current charge-discharge cycling and evaluated for cycle life still has an initial capacitance of 80% (144F/g) after cycling at 10A/g for 8000 times, and has good cycling stability.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. The preparation method of the biomass activated carbon-based electrode material is characterized by comprising the following steps of:
step 1: washing the raw material of the corn straw powder by deionized water, drying, grinding and screening by a 60-mesh screen to obtain clean corn straw powder;
and 2, step: KOH and FeCl 3 Dissolving in deionized water to obtain KOH and FeCl 3 Mixing the solution, namely adding the clean corn straw powder obtained in the step 1 into the mixed solution, and fully stirring to form a uniform mixture;
and 3, step 3: adding KMnO into the above solution 4 Continuously stirring the powder, pouring the mixture into a culture dish after uniformly stirring, and drying the mixture in a drying oven;
and 4, step 4: the dried product of step 3 was ground thoroughly and sieved through a 60 mesh screen before placing in an atmospheric tube furnace under N 2 Calcining and activating in the atmosphere, and cooling to room temperature after reaction to obtain a corn straw-based porous carbon primary product;
and 5: washing the initial product obtained in the step 4 with dilute hydrochloric acid, repeatedly washing with deionized water to make the initial product neutral, drying, and sieving to obtain the corn straw-based porous carbon material, namely the biomass activated carbon-based electrode material.
2. The preparation method of the biomass activated carbon-based electrode material according to claim 1, characterized in that: the drying temperature in the step 1 is 105 ℃, and the drying time is 12 hours.
3. The preparation method of the biomass activated carbon-based electrode material according to claim 1, characterized in that: KOH and FeCl in step 2 3 And the mass ratio of the clean corn straw powder is 1.
4. The preparation method of the biomass activated carbon-based electrode material according to claim 3, characterized in that: KOH and FeCl in step 2 3 And the mass ratio of the clean corn straw powder is 1.
5. The method for preparing a biomass activated carbon-based electrode material according to claim 1, characterized in that: KMnO in step 3 4 The mass ratio of the powder to the clean corn straw powder is 1.
6. The preparation method of the biomass activated carbon-based electrode material according to claim 1, characterized in that: in the step 3, the mixing and stirring time is 6-12 hours, the drying temperature is 80-120 ℃, and the drying time is 12-24 hours.
7. The method for preparing a biomass activated carbon-based electrode material according to claim 1, characterized in that: in the step 4, the calcining activation temperature is 600-900 ℃, and the time is 1-3 hours.
8. The preparation method of the biomass activated carbon-based electrode material according to claim 1, characterized in that: the concentration of the dilute hydrochloric acid in step 5 is 1mol/L, wherein the molar ratio of HCl to KOH in the previous step is 1.2.
9. The application of the biomass activated carbon-based electrode material prepared by the method in claim 1 in preparing a supercapacitor electrode.
10. The application of the biomass activated carbon-based electrode material in the preparation of the supercapacitor electrode according to claim 9 is characterized by comprising the following specific processes: grinding the biomass activated carbon-based electrode material to 200 meshes, mixing the ground biomass activated carbon-based electrode material with acetylene black and PTFE in a mortar according to the mass ratio of 8.
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| CN107298441A (en) * | 2016-12-21 | 2017-10-27 | 北京化工大学 | A kind of method that use waste biomass material prepares super capacitor material |
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| WO2021184531A1 (en) * | 2020-03-20 | 2021-09-23 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113636550A (en) * | 2021-07-14 | 2021-11-12 | 东北农业大学 | Method for preparing straw-based nitrogen-rich mesoporous carbon by one-step method and application thereof |
| CN115337905A (en) * | 2022-08-19 | 2022-11-15 | 重庆大学 | Nano-iron modified biochar composite material and preparation method and application thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298441A (en) * | 2016-12-21 | 2017-10-27 | 北京化工大学 | A kind of method that use waste biomass material prepares super capacitor material |
| CN110217793A (en) * | 2019-07-10 | 2019-09-10 | 安徽华威新能源有限公司 | A kind of preparation method of stalk matrix activated carbon electrode material for super capacitor that strengthening energy storage efficiency by manganese ore |
| WO2021184531A1 (en) * | 2020-03-20 | 2021-09-23 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113636550A (en) * | 2021-07-14 | 2021-11-12 | 东北农业大学 | Method for preparing straw-based nitrogen-rich mesoporous carbon by one-step method and application thereof |
| CN115337905A (en) * | 2022-08-19 | 2022-11-15 | 重庆大学 | Nano-iron modified biochar composite material and preparation method and application thereof |
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