CN111017925A - Preparation and application of novel porous carbon material with high energy storage performance - Google Patents
Preparation and application of novel porous carbon material with high energy storage performance Download PDFInfo
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes 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
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- H—ELECTRICITY
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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- H—ELECTRICITY
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a novel porous carbon material with high energy storage performance, which is prepared by vinasse derivation, wherein vinasse is pre-carbonized at low temperature to obtain a carbon precursor, the carbon precursor and an alkaline inorganic substance are directly mixed and calcined to obtain the vinasse derived porous carbon material, the obtained material is honeycomb-shaped, and the specific surface area range is 1000-4000 m-2g‑1(ii) a The fermentation method of the vinasse is full-course semi-solid semi-liquid state fermentation; the vinasse is three-flower wine vinasse. The preparation method comprises the following steps: 1) preparing a carbon precursor, drying, grinding and pre-carbonizing at a low temperature to obtain the carbon precursor; 2)the preparation method comprises the steps of grinding, mixing, calcining, soaking, washing, filtering, drying and grinding the vinasse-derived porous carbon material to obtain the vinasse-derived porous carbon material.
Description
Technical Field
The invention relates to the technical field of supercapacitors, in particular to a preparation method and application of a novel porous carbon material with high energy storage performance.
Background
With the global rapid development and the increasing demand for energy, the search for a green and environment-friendly energy storage device to store renewable energy and realize energy upgrading is urgent. The super capacitor is also called as an electrochemical capacitor, is a novel electrochemical energy conversion and energy storage device, and has the characteristics of high power density, long cycle life, wide use temperature range and the like. In recent years, super capacitors have made great progress in both theoretical research and practical application, but still face the problems of insufficient energy density and high production cost. The electrode material is a core component of the super capacitor and plays a crucial role in the performance of the super capacitor.
For a super capacitor, performance problems are no doubt the focus of attention of researchers, but today with increasingly outstanding environmental problems, whether the super capacitor is green and environment-friendly, whether the super capacitor is low in price and the like are also the main points of attention of people.
Biomass materials have the following advantages: 1. the biomass material has the advantages of wide source, low price and environmental friendliness; 2. the porous carbon material prepared from the biomass material generally has the advantages of good conductivity, large specific surface area and stable chemical property; 3. various elements are rich, and miscellaneous elements are formed in the porous carbon material, so that the surface wettability of the material and the contact area between the material and electrolyte are increased, the pseudo-capacitance effect is improved, and the specific capacitance of the supercapacitor material is favorably improved. Therefore, the method for preparing the carbon material by adopting the biomass material is one of effective methods for improving the performance of the supercapacitor.
Prior art Tang et al, "A Novel ports N-and S-Self-consistent Carbon fiber threads as High-Performance Electrode Materials in a serving capacitorCS Sustainable Chemistry&The technical scheme provided by Engineering 2019 is as follows: directly using the sticky rice as the raw material, preparing the biologically-derived multi-layer graphene low-dimensional carbon material by one-step carbonization, and obtaining the material with the specific capacitance of 0.5Ag-1Give down 289.9F g-1The technical effect of (1). The preparation method proves the advantages of the biomass material, but has the following technical problems: 1. the method has the advantages that the biomass material selected by the method is glutinous rice, and the specific surface area of the prepared carbon material is only 1371.5m because the glutinous rice does not have a specific micro-morphology and is not specially treated2g-1Resulting in lower specific capacitance performance; 2. the glutinous rice serving as a grain crop has high economic value, the market price exceeds 5 yuan/500 g, and the glutinous rice is related to the national grain safety problem, does not have the characteristic of changing waste into valuable by preparing carbon materials from waste biomass materials.
In view of the above problems, the applicant believes that the above problems can be effectively solved by treating biomass materials represented by glutinous rice by fermentation: 1. gas can be generated in the fermentation process, so that the pore-forming effect of the material is realized; 2. according to other research results of the applicant, the yeast bacteria generated in the fermentation process can effectively improve the specific capacitance performance due to the specific shape of the spheres and the shell-core structure formed in the carbonization process.
In addition, from the analysis of the linkage of the research and production, the economic value of the technology must be considered. The fermentation process of brewing wine can generate remarkable economic benefit, and the market price of the vinasse generated is not higher than 1 yuan/500 g. Therefore, the vinasse is used as the raw material, the cost of the raw material is far better than that of the glutinous rice, and the economic value of the glutinous rice can be improved in the whole industrial chain. Meanwhile, through research by the applicant, the treatment mode of vinasse by the wine brewing enterprises at present is very limited. Taking Guangxi Guilin Sanhua wine as an example, the annual yield of the Sanhua wine is more than 1500 tons, and the vinasse is more than 2000 tons. If the livestock cannot be fed and treated as feed, the feed can be discarded as waste, which causes environmental problems. Due to the serious influence of recent swine fever on livestock breeding, vinasse treatment becomes a practical problem to be solved urgently by brewing enterprises. If the vinasse is used as the raw material to prepare the super capacitor, the technology is extremely effective and has high economic value. However, the research in this field is almost zero.
After the research and study of the applicant's literature, only the research related to the preparation of supercapacitors by fermentation using distillers grains as raw material has been found by Zhang et al, "chromatography and electrochemical applications of a carbon with high reliability of surface functional groups from bottom layer.Journal of Solid State Electrochemistry2008,13(6) 887 fructus Anisi Stellati and 893. Using brewer's grain as raw material, obtaining carbon material after one-step carbonization, the highest specific capacitance reaches 120F g-1. The method basically meets the requirements, but the specific capacitance of the obtained material is lower than that of the glutinous rice serving as the raw material. The applicant finds that the direct reason of the lower specific capacitance is that the obtained material does not have a porous structure, so that the specific surface area of the carbon material is lower. In the first residue-liquid separation process, yeast mainly exists in liquid and is separated from vinasse, so that most of vinasse is not subjected to a complete fermentation process, namely, a sufficient porous structure is not formed in the subsequent fermentation process, and the material performance is low.
In addition, in order to obtain a larger specific surface area, a gas-generating pore-forming agent can be additionally added in the prior art, so that the material performance is improved. Li et al, "high effective carbon from floor leaves by synthesis K2CO3 and the superior performance.Journal of Power Sources2015,299519-528 comprises leaves of Chinese ash tree as raw material, adding K2CO3By thermal decomposition to produce CO2The characteristic of (2) is that the pore structure of the material is regulated and controlled, and a higher specific surface area of 2869 m is obtained2g−1And finally obtaining the maximum specific capacitance of 310F g−1The technical effect of (1). The problems of the method are that: 1. additionally adding pore-forming agent in mass productionIn the process, the situation of structural collapse caused by insufficient or excessive pore forming is easily caused, the process control difficulty is greatly increased, and the yield of the product is seriously influenced; 2. also precisely due to K2CO3The adverse effect of the etching of the pore-forming agent on the carbon material is reflected in the poor rate capability and cycle performance of the material when the material is used as a super capacitor. In addition, the leaves contain a small amount of elements, so that pseudo-capacitance reaction on the surface of the material is difficult to occur, and the performance is not high.
Based on the reasons, the applicant researches and discovers the three-flower wine culture according to local industrial characteristics of Guangxi Guilin: the three-flower wine is brewed with rice as material and through adding distiller's yeast and semi-solid and semi-liquid fermentation. Unlike the beer fermentation process described above, the rice is involved in a complete fermentation process in which the starch is continuously broken down and CO is produced2Gas, the reaction equation of which is: c6H1206→2C2H5OH+2CO2. The fermentation treatment can generate carbon dioxide gas to form a unique circular porous structure, and most importantly, the whole process is semi-solid semi-liquid fermentation, and slag and liquid are not separated in the midway, so that the formation of the porous structure is promoted. The porous channels can better expose elements rich in the porous channels. On the basis of the porous structure, a rich and developed pore structure is obtained after simple one-step activation treatment, the pore structure is favorable for the surface wettability of the material and the migration of charged particles, and the heteroatom rich in the pore structure can improve the pseudocapacitance effect and is favorable for the storage of more charged particles, so that the performance of the material is effectively improved. The invention shows that the novel porous carbon material with high energy storage performance is obtained as the material.
Disclosure of Invention
The invention aims to provide a preparation method and application of a novel porous carbon material with high energy storage performance.
The principle of the invention is that the vinasse is rich in elements such as nitrogen, oxygen, phosphorus, sulfur and the like and a unique porous structure formed in a fermentation process is utilized, so that the surface wettability of the carbon material is effectively improved, the contact area of electrolyte and the material is increased, the pore size distribution is optimized, and finally the specific capacity and the cycling stability of the electrode material are improved. On the basis of environmental protection, the method fully realizes the purpose of changing waste into valuable and improves the economic value of the vinasse.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a novel porous carbon material with high energy storage performance is prepared by pre-carbonizing distiller's grains at low temperature to form a carbon precursor, directly mixing and calcining the carbon precursor and an alkaline inorganic substance to obtain a distiller's grain-derived porous carbon material, wherein the obtained material is cellular and has a specific surface area ranging from 1000-4000 m2g-1(ii) a The fermentation method of the vinasse is full-course semi-solid semi-liquid state fermentation; the vinasse is three-flower wine vinasse.
A preparation method of a novel porous carbon material with high energy storage performance comprises the following steps:
step 1) preparing a carbon precursor, namely drying, grinding and crushing vinasse brewed by the three-flower wine, and performing low-temperature pre-carbonization on the obtained powder under the conditions that the pre-carbonization temperature is 300-600 ℃ and the pre-carbonization time is 0.5-4 h to obtain the carbon precursor;
step 2) preparing a novel porous carbon material with high energy storage performance, grinding and mixing the carbon precursor obtained in the step 1 and the alkaline inorganic substance according to the mass ratio of the carbon precursor to the alkaline inorganic substance of 1.0 (4.0-5.0), calcining at the calcining temperature of 600-1000 ℃ for 0.5-4 h, and then soaking, washing, filtering, drying and grinding to obtain the novel porous carbon material with high energy storage performance;
the alkaline inorganic substance in the step 2 is any one of potassium hydroxide, sodium hydroxide and zinc chloride.
Application of novel high-energy-storage-performance porous carbon material as supercapacitor electrode material when current density is 1A g-1The specific capacitance value ranges from 350-500F g-1。
According to experimental detection, the novel porous carbon material with high energy storage performance has the following results:
the scanning electron microscope experiment detects that the prepared novel porous carbon material with high energy storage performance is in a honeycomb structure, and a large number of holes are formed in the surface;
the electrochemical test experiment detects that the prepared novel porous carbon material with high energy storage performance has excellent capacitance performance, and when the current density is 1A g-1The specific capacitance value ranges from 350-500F g-1。
Therefore, compared with the prior art, the invention has the following advantages:
1) the invention has the advantages of simple whole process, low activation temperature, convenient control, cleanness, environmental protection and easy realization of industrialization;
2) the three-flower wine lees are used as raw materials, and the lees are well fermented and then steamed for three times, so that the three-flower wine lees have the characteristics of a special microstructure and are rich in elements such as nitrogen, oxygen, phosphorus, sulfur and the like, and the surface wettability of the material can be increased without additional doping, and a pseudo-capacitance effect is generated, so that the material has higher electrochemical performance;
3) the biomass-based porous carbon material prepared by the method has high specific surface area in the range of 1000-4000 m2g-1Has abundant pores and uniform average pore size distribution. The invention changes waste into valuable and fully improves the economic value of the vinasse.
Therefore, the vinasse-derived porous carbon electrode material for the supercapacitor prepared by using the vinasse has the advantages of cheap and environment-friendly raw materials, simple process and good comprehensive performance, and when the material in the preferred embodiment is used as the electrode material of the supercapacitor, the current density is 1A g-1When the specific capacitance reaches 463F g-1The performance of the supercapacitor is obviously superior to that of the supercapacitor made of the similar porous carbon materials reported in the prior patents and literatures, and the supercapacitor is suitable for industrial production. Has great application potential in the fields of porous carbon materials and supercapacitors.
Drawings
FIG. 1 is an SEM topography of an unactivated distillers grain-derived porous carbon material of example 1;
FIG. 2 is an SEM topography of the activated vinasse-derived porous carbon material of example 1;
FIG. 3 is a TEM topography of the distillers grain-derived porous carbon material prepared in example 1;
FIG. 4 is a spectrum of the porous carbon material derived from distiller's grains prepared in example 1;
FIG. 5 is a GCD curve of the distillers' grain-derived porous carbon material prepared in example 1 at different current densities;
FIG. 6 is a capacitance cycling voltammogram of the vinasse-derived porous carbon material prepared in example 1;
FIG. 7 shows that the porous carbon material derived from distiller's grains prepared in example 2 and comparative example 1 is at 1A g-1A GCD curve of (1);
FIG. 8 shows the measured values of the distiller's grain-derived porous carbon material prepared in example 2 and comparative example 1 at 20 mV s-1The lower CV curve;
FIG. 9 is an SEM topography of the distillers grain-derived porous carbon material prepared in comparative example 1;
FIG. 10 is an SEM topography of the vinasse-derived porous carbon material prepared in example 2;
FIG. 11 shows that the porous carbon materials derived from distiller's grains prepared in comparative examples 2 and 3 are at 1A g-1A GCD curve of (1);
FIG. 12 shows that the distiller's grain-derived porous carbon materials prepared in comparative examples 2 and 3 are at 20 mV s-1The lower CV curve;
fig. 13 is a nitrogen adsorption and pore size distribution diagram of the distiller's grain-derived porous carbon materials prepared in example 1, example 2, and comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, which are given by way of examples, but are not intended to limit the present invention.
Example 1
When the mass ratio of the vinasse-derived carbon precursor to the potassium hydroxide is 1.0:4.0, the preparation and application of the novel porous carbon material with high energy storage performance are provided.
Step 1) preparing a carbon precursor, namely drying the vinasse in a forced air drying oven at 80 ℃, grinding the dried vinasse, and calcining in a tubular furnace under the protection of nitrogen atmosphere, wherein the calcining temperature is 500 ℃, the calcining time is 2h, and the heating rate is 5 ℃/min to obtain the carbon precursor;
in order to prove that the vinasse has a porous structure, the carbon precursor obtained in the step 1 is detected by a Scanning Electron Microscope (SEM), and the result is shown in fig. 1, wherein the carbon precursor has a pore structure.
And 2) preparing a novel porous carbon material with high energy storage performance, mixing 1g of the carbon precursor obtained in the step 1) and an alkaline inorganic substance according to a certain mass ratio of 1.0:4.0, grinding and uniformly mixing in a mortar, and then putting into a tubular furnace to calcine under the protection of nitrogen atmosphere at 700 ℃ for 2 hours. And then soaking and cleaning the calcined material by using a 1M hydrochloric acid solution, washing by using deionized water, performing suction filtration until filtrate shows neutrality, and drying the obtained sample in a drying oven at 80 ℃ to obtain the novel porous carbon material with high energy storage performance, which is marked as JK-1.4-700.
In order to prove that the activated novel high-energy-storage-performance porous carbon material has a richer pore structure, SEM detection is performed on the vinasse-derived porous carbon material obtained in the step 2, the result is shown in figure 2, and the novel high-energy-storage-performance porous carbon material obtains a richer secondary pore structure on the pore structure of the carbon precursor and finally presents a honeycomb structure.
In order to confirm that the prepared carbon material is amorphous carbon, the porous carbon material prepared in example 1 was examined by a transmission electron microscope, and as a result, as shown in fig. 3, the carbon material exhibited a distinct amorphous carbon structure.
Meanwhile, the energy spectrum diagram of fig. 4 also clearly confirms that the porous carbon material prepared in example 1 contains rich elements such as nitrogen, oxygen, phosphorus, sulfur and the like, and can enhance the wettability of the electrode material, increase the contact area between the electrolyte and the material, improve the pseudo-capacitance effect of the material, and the material has higher capacitance performance.
In order to prove that the novel high-energy-storage-performance porous carbon material prepared in the example 1 has higher capacitance performance when being applied as a supercapacitor electrode material, constant-current charging and discharging are carried out under the condition that the electrolyte is a water systemThe results of the test are shown in FIG. 5, when the current density is 1A g-1When the specific capacitance reaches 463F g-1Compared with the white ash tree with the highest specific capacitance in the above document (310F g)−1) In other words, the material has higher capacitance performance, and the specific capacitance is 1.5 times that reported in the literature.
In order to prove that the novel porous carbon material with high energy storage performance prepared in example 1 has good rate capability when being applied as a supercapacitor electrode material, a cyclic voltammetry test performed under the condition that an electrolyte is a water system shows that a good nearly rectangular shape can be still maintained at a large scanning speed, and the good rate capability is shown as shown in fig. 6.
In order to investigate the effect of the addition amount of the activator on the performance of the porous carbon material, comparative example 1 and example 2 were provided, and porous carbon materials of different mass ratios were prepared by adjusting the ratio of the activator to the material.
Comparative example 1
When the mass ratio of the vinasse-derived carbon precursor to the potassium hydroxide is 1.0:3.0, the porous carbon material is prepared.
The steps not specifically described in the specific steps are the same as the preparation method described in example 1, except that: the mass ratio of the carbon precursor to the potassium hydroxide in the step 2) is 1.0:3.0, and the prepared material is marked as JK-1.3-700.
The material JK-1.3-700 was electrochemically tested in the same manner as in example 1, and the test results are shown as curve 1 in FIG. 7 and curve 1 in FIG. 8; when the current density is 1A g-1The specific capacitance value of the electrode material JK-1.3-700 prepared in example 2 is 189F g-1。
In order to demonstrate the reason for the large decrease in specific capacitance, SEM test was performed on JK-1.3-700, and the result is shown in FIG. 9, where the material did not form a honeycomb-like porous structure in most places. The results of the experiments show that reducing the amount of activator results in an under-activated material.
To further confirm the above idea, BET test was performed on JK-1.3-700, and the test results showed that the specific surface area of JK-1.3-700 material was only 1073 m2g-1Less than one third of the specific surface area of JK-1.4-700And thus the material properties are not high.
Example 2
When the mass ratio of the vinasse-derived carbon precursor to the potassium hydroxide is 1.0:5.0, the novel porous carbon material with high energy storage performance is provided.
The steps not specifically described in the specific steps are the same as the preparation method described in example 1, except that: the mass ratio of the carbon precursor to the potassium hydroxide in the step 2) is 1.0: 5.0. The prepared material is marked as JK-1.5-700.
The material JK-1.5-700 was electrochemically tested in the same manner as in example 1, and the test results are shown as curve 2 in FIG. 7 and curve 2 in FIG. 8; when the current density is 1A g-1In this case, the specific capacitance value of the electrode material JK-1.5-700 prepared in example 3 was 357F g-1。
Similarly, in order to obtain the microstructure of the material, the JK-1.5-700 is subjected to SEM test, and as a result, as shown in FIG. 10, the channels of the material begin to be damaged and collapsed, which proves that too much activating agent can cause the material to be over-activated, and the porous structure begins to collapse, thus affecting the transmission of ions and causing the material to have reduced performance.
By comparing the analysis of example 1, comparative example 1 and example 2, it can be seen that when the mass ratio of the distillers' grain-derived carbon precursor to potassium hydroxide is 1.0:4.0, the best material is obtained, the structure is more stable than JK-1.5-700, and the performance is better than JK-1.5-700. When the addition amount of potassium hydroxide is small, the material cannot be effectively activated; when the amount is large, the collapse of the channels may occur.
In order to research the influence of the temperature on the performance of the novel porous carbon material with high energy storage performance, comparative example 2 and comparative example 3 are provided, and after the optimal mass ratio is determined, porous carbon materials at different temperatures are prepared by adjusting the calcining temperature.
Comparative example 2
When the mass ratio of the vinasse-derived carbon precursor to the potassium hydroxide is 1.0:4.0, the porous carbon material is prepared.
The steps not specifically described in the specific steps are the same as the preparation method described in example 1, except that: the activation temperature in the step 2) is 600 ℃, and the prepared material is marked as JK-1.4-600.
The material JK-1.4-600 was electrochemically tested in the same manner as in example 1, and the test results are shown as curve 1 in FIG. 11 and curve 1 in FIG. 12; when the current density is 1A g-1In comparison, the electrode material prepared in comparative example 2 has a specific capacitance value of 298F g of JK-1.4-600-1It was confirmed that proper activation of the activator did contribute to the improvement of specific capacitance, but the low activation temperature resulted in incomplete activation of the activator and incomplete pore channels.
Comparative example 3
When the mass ratio of the vinasse-derived carbon precursor to the potassium hydroxide is 1.0:4.0, the porous carbon material is prepared.
The steps not specifically described in the specific steps are the same as the preparation method described in example 1, except that: the activation temperature in the step 2) is 800 ℃, and the prepared material is marked as JK-1.4-800.
The material JK-1.4-800 was electrochemically tested in the same manner as in example 1, and the test results are shown as curve 2 in FIG. 11 and curve 2 in FIG. 12; when the current density is 1A g-1In the case of comparative example 3, the specific capacitance value of the electrode material JK-1.4-800 was 327F g-1Comparison with the specific capacitance of the product of example 1 shows that too high a temperature also leads to a reduction in the properties of the material.
As can be seen from comparative examples 2 and 3, the specific capacitances of the materials JK-1.4-600 and JK-1.4-800 are lower than those of the materials JK-1.4-700, and the fact that the temperature actually has a great influence on the performance of the materials is proved.
In order to study the effect of different proportions of activators on the specific surface area of the material, the samples of example 1, example 2 and comparative example 1 were subjected to nitrogen adsorption and desorption curve tests, and the test results are shown in fig. 13. Curves 1, 2 and 3 in FIG. 13 correspond to JK-1.4-700, JK-1.3-700 and JK-1.5-700 samples, respectively, and the specific surface areas thereof are 3370 m2g-1，1073 m2g-1，3002 m2g-1It is clear that the effect of the activator on the specific surface area is great, only at a ratio of 1.0:4.0, at a temperature of 700 deg.CThe optimal specific surface area is achieved.
Therefore, the obtained porous carbon material can fully exert the electrochemical performance only through the process technology provided by the invention.
Claims (9)
1. A novel porous carbon material with high energy storage performance is characterized in that: the method comprises the steps of carrying out low-temperature pre-carbonization on vinasse to form a carbon precursor, directly mixing and calcining the carbon precursor and an alkaline inorganic substance to obtain a vinasse-derived porous carbon material, wherein the obtained material is honeycomb-shaped and has a specific surface area range of 1000-4000 m2g-1。
2. The novel porous carbon material with high energy storage performance according to claim 1, wherein: the fermentation method of the vinasse is full-course semi-solid semi-liquid state fermentation.
3. The novel porous carbon material with high energy storage performance according to claim 1, wherein: the vinasse is three-flower wine vinasse.
4. A preparation method of a novel porous carbon material with high energy storage performance is characterized by comprising the following steps:
step 1) preparing a carbon precursor, namely drying, grinding and crushing vinasse, and performing low-temperature pre-carbonization on the obtained powder under certain conditions to obtain the carbon precursor;
step 2) preparing a novel porous carbon material with high energy storage performance, grinding and mixing the carbon precursor obtained in the step 1 and an alkaline inorganic substance according to a certain mass ratio, calcining under a certain condition, soaking, washing, filtering, drying and grinding to obtain the novel porous carbon material with high energy storage performance;
the alkaline inorganic substance in the step 2 is any one of potassium hydroxide, sodium hydroxide and zinc chloride.
5. The method of claim 4, wherein: the vinasse obtained in the step 1 is the vinasse obtained after the three-flower wine is brewed.
6. The method of claim 4, wherein: the low-temperature pre-carbonization condition in the step 1 is that the pre-carbonization temperature is 300-.
7. The method of claim 4, wherein: the mass ratio of the carbon precursor to the alkaline inorganic substance in the step 2 is 1.0 (4.0-5.0).
8. The method of claim 4, wherein: the calcination condition in the step 2 is that the calcination temperature is 600-1000 ℃, and the calcination time is 0.5-4 h.
9. The utility model provides a novel high energy storage performance porous carbon material is as application of ultracapacitor system electrode material which characterized in that: when the current density is 1A g-1The specific capacitance value ranges from 350-500F g-1。
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112289591A (en) * | 2020-10-23 | 2021-01-29 | 桂林电子科技大学 | Vinasse porous carbon/cobalt nickel hydroxide electrode material and preparation process thereof |
| CN112938967A (en) * | 2021-05-07 | 2021-06-11 | 桂林电子科技大学 | Fermented bean curd-based porous carbon material and preparation method and application thereof |
| CN113479879A (en) * | 2021-08-02 | 2021-10-08 | 桂林电子科技大学 | Activated carbon material based on secondary fermentation vinasse and preparation method and application thereof |
| CN113666370A (en) * | 2021-09-27 | 2021-11-19 | 太原理工大学 | Method for preparing capacitance carbon material by secondary microbial fermentation and activation of vinasse |
| CN113856627A (en) * | 2021-11-01 | 2021-12-31 | 贵州大学 | Preparation method and application of vinasse-based biochar for deep dechromization of wet-process phosphoric acid |
| CN114974915A (en) * | 2022-05-18 | 2022-08-30 | 华南理工大学 | Two-dimensional lamellar hierarchical porous carbon material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112289591A (en) * | 2020-10-23 | 2021-01-29 | 桂林电子科技大学 | Vinasse porous carbon/cobalt nickel hydroxide electrode material and preparation process thereof |
| CN112938967A (en) * | 2021-05-07 | 2021-06-11 | 桂林电子科技大学 | Fermented bean curd-based porous carbon material and preparation method and application thereof |
| CN113479879A (en) * | 2021-08-02 | 2021-10-08 | 桂林电子科技大学 | Activated carbon material based on secondary fermentation vinasse and preparation method and application thereof |
| CN113666370A (en) * | 2021-09-27 | 2021-11-19 | 太原理工大学 | Method for preparing capacitance carbon material by secondary microbial fermentation and activation of vinasse |
| CN113856627A (en) * | 2021-11-01 | 2021-12-31 | 贵州大学 | Preparation method and application of vinasse-based biochar for deep dechromization of wet-process phosphoric acid |
| CN114974915A (en) * | 2022-05-18 | 2022-08-30 | 华南理工大学 | Two-dimensional lamellar hierarchical porous carbon material and preparation method and application thereof |
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