WO2024000175A1 - Preparation method for porous carbon and manganese dioxide composite supercapacitor electrode material - Google Patents
Preparation method for porous carbon and manganese dioxide composite supercapacitor electrode material Download PDFInfo
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- WO2024000175A1 WO2024000175A1 PCT/CN2022/101976 CN2022101976W WO2024000175A1 WO 2024000175 A1 WO2024000175 A1 WO 2024000175A1 CN 2022101976 W CN2022101976 W CN 2022101976W WO 2024000175 A1 WO2024000175 A1 WO 2024000175A1
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- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000007772 electrode material Substances 0.000 title claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 38
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 238000000197 pyrolysis Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000010907 mechanical stirring Methods 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 244000273256 Phragmites communis Species 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002484 cyclic voltammetry Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
Definitions
- the present invention relates to the field of preparation of electrode materials for supercapacitors, and in particular to a method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials.
- supercapacitors are widely used in hybrid electric vehicles and portable electronic devices due to their high power density, long service life, and fast charge and discharge speeds, and have become a research hotspot in recent years.
- Electrode materials are the core components of supercapacitors.
- the capacitance value of carbon materials is often proportional to their specific surface area.
- Manganese dioxide exhibits pseudocapacitive behavior.
- the electrode material prepared by compounding carbon materials and manganese dioxide has the synergy of two conductive mechanisms. Under the action, the specific capacitance value of the material can be greatly improved.
- Reeds are rich in cellulose and can be extracted and used as industrial raw materials for papermaking and other industries. However, the extracted reed waste is often thrown away. This project uses reed waste as raw material, and prepares porous carbon electrode materials after pyrolysis and activation, so that the reeds can be "eaten and squeezed” to achieve efficient resource utilization in biomass chemical industry.
- manganese dioxide is easily agglomerated, resulting in a reduction in the specific capacitance value of the material. Therefore, how to prepare composite materials with regular structure and good electrochemical properties has become the focus of research.
- the method involved in this patent is a method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials.
- the present invention relates to a preparation method of porous carbon and manganese dioxide composite supercapacitor electrode materials, which includes the following steps:
- the pyrolysis of reed waste in step (1) refers to putting the reed waste into a tubular muffle furnace under the protection of inert gas, carbonizing it at 700-1000°C for 3-8 hours, and obtaining carbon materials after cooling. .
- the inert gas in step (1) is nitrogen or argon.
- the preparation of the porous carbon material described in step (2) means adding a strong alkali substance to the carbon material described in step (1), placing it in a tubular muffle furnace, and activating it at 700 to 1000°C 3 ⁇ 8h, and after cooling, the porous carbon material is obtained.
- the porous electrode material is obtained through water washing, suction filtration, washing, and vacuum drying.
- the strong alkaline substance described in step (2) refers to potassium hydroxide, sodium hydroxide, etc.
- Step (3) Preparation of porous carbon and manganese dioxide composite materials refers to dispersing the carbon material described in step (2) in an aqueous solution under the action of ultrasonic waves with a frequency of 30 to 50 kHz for 0.5 to 2 hours, and the concentration of the carbon material is 0.05 to 0.5wt/%.
- the advantage of the present invention is that the porous carbon material obtained by carbonizing reed waste at high temperature has the advantages of simple operation and high yield, and can realize industrialization.
- the porous carbon and manganese dioxide composite material obtained by the present invention has the advantages of simple process, low cost, good conductivity, good cycle stability, excellent thermal stability, etc., can be used as an electrode material in supercapacitors, and has good industrial applications. prospect.
- Figure 1 is the cyclic voltammetry curve of the composite electrode material of Example 2 at different scanning speeds, in which the abscissa is the potential and the ordinate is the current.
- Figure 2 is an electron microscope photograph of the composite electrode material of Example 2.
- the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%.
- 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 2 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-700-MnO 2 -2h) was obtained.
- the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%.
- 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 1 hour. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-800-MnO 2 -1h) was obtained.
- the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%.
- 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 2 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-1000-MnO 2 -2h) was obtained.
- the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%.
- 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 5 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-800-MnO 2 -5h) was obtained.
Abstract
A preparation method for a porous carbon and manganese dioxide composite supercapacitor electrode material, comprising the following specific steps: (1) pyrolysis of reed waste; (2) preparation of a porous carbon material; and (3) preparation of a porous carbon and manganese dioxide composite supercapacitor electrode material.
Description
本发明涉及超级电容器的电极材料的制备领域，尤其涉及一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法。The present invention relates to the field of preparation of electrode materials for supercapacitors, and in particular to a method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials.
超级电容器作为一种新型的储能装置，以其高功率密度、长使用寿命和快充放电速度等优点被广泛用于混合电动汽车和便携式电子设备，已成为近年来的研究热点。As a new type of energy storage device, supercapacitors are widely used in hybrid electric vehicles and portable electronic devices due to their high power density, long service life, and fast charge and discharge speeds, and have become a research hotspot in recent years.
电极材料作为超级电容器的核心配件，碳材料的电容值常与其比表面积成正比，二氧化锰为赝电容行为，将碳材料与二氧化锰复合制备得到的电极材料，在两种导电机理的协同作用下，材料的比电容值可以得到极大提升。芦苇中含有丰富的纤维素，可提取作为造纸等工业原料，但是经提取后的芦苇废料常被扔掉。本项目以芦苇废料为原料，经热解、活化后制备得到多孔碳电极材料，从而可将芦苇“吃干榨净”，实现生物质化工高效资源化应用。但是二氧化锰极易团聚，导致材料的比电容值降低，因此如何制备得到结构规整、电化学性能较好的复合材料成为研究的重点。Electrode materials are the core components of supercapacitors. The capacitance value of carbon materials is often proportional to their specific surface area. Manganese dioxide exhibits pseudocapacitive behavior. The electrode material prepared by compounding carbon materials and manganese dioxide has the synergy of two conductive mechanisms. Under the action, the specific capacitance value of the material can be greatly improved. Reeds are rich in cellulose and can be extracted and used as industrial raw materials for papermaking and other industries. However, the extracted reed waste is often thrown away. This project uses reed waste as raw material, and prepares porous carbon electrode materials after pyrolysis and activation, so that the reeds can be "eaten and squeezed" to achieve efficient resource utilization in biomass chemical industry. However, manganese dioxide is easily agglomerated, resulting in a reduction in the specific capacitance value of the material. Therefore, how to prepare composite materials with regular structure and good electrochemical properties has become the focus of research.
发明内容Contents of the invention
发明目的：本专利涉及的方法是一种多孔碳与二氧化锰复合超级电容器电 极材料的制备方法。Purpose of the invention: The method involved in this patent is a method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials.
技术方案：为了实现上述目的，本发明涉及一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，包括如下步骤：Technical solution: In order to achieve the above objectives, the present invention relates to a preparation method of porous carbon and manganese dioxide composite supercapacitor electrode materials, which includes the following steps:
(1)芦苇废料的热解；(1) Pyrolysis of reed waste;
(2)多孔碳材料的制备。(2) Preparation of porous carbon materials.
(3)多孔碳与二氧化锰复合超级电容器电极材料的制备。(3) Preparation of porous carbon and manganese dioxide composite supercapacitor electrode materials.
步骤(1)所述的芦苇废料的热解是指在惰性气体的保护下，将芦苇废料放入管式马弗炉中，在700～1000℃下进行碳化3～8h，冷却后得到碳材料。The pyrolysis of reed waste in step (1) refers to putting the reed waste into a tubular muffle furnace under the protection of inert gas, carbonizing it at 700-1000°C for 3-8 hours, and obtaining carbon materials after cooling. .
步骤(1)所述的惰性气体为氮气或氩气。The inert gas in step (1) is nitrogen or argon.
步骤(2)所述的多孔碳材料的制备是指将步骤(1)中所述的碳材料中，加入强碱物质，放入管式马弗炉中，在700～1000℃下进行活化3～8h，冷却后得到多孔碳材料。通过水洗、抽滤、洗涤、真空干燥得到多孔电极材料。The preparation of the porous carbon material described in step (2) means adding a strong alkali substance to the carbon material described in step (1), placing it in a tubular muffle furnace, and activating it at 700 to 1000°C 3 ~8h, and after cooling, the porous carbon material is obtained. The porous electrode material is obtained through water washing, suction filtration, washing, and vacuum drying.
步骤(2)所述的强碱物质是指氢氧化钾、氢氧化钠等。The strong alkaline substance described in step (2) refers to potassium hydroxide, sodium hydroxide, etc.
步骤(3)多孔碳与二氧化锰复合材料的制备是指将步骤(2)所述的碳材料在频率为30～50kHz超声波作用下分散在水溶液中0.5～2h，碳材料的浓度为0.05～0.5wt/％。在上述混合溶液中，在搅拌转速为200～400rpm的机械搅拌作用下，逐滴加入200-500mL 0.01～0.1mol/L的高锰酸钾水溶液。滴加完成后，将混合溶液继续搅拌0.5～5h。结束后，抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合超级电容器电极材料。Step (3) Preparation of porous carbon and manganese dioxide composite materials refers to dispersing the carbon material described in step (2) in an aqueous solution under the action of ultrasonic waves with a frequency of 30 to 50 kHz for 0.5 to 2 hours, and the concentration of the carbon material is 0.05 to 0.5wt/%. In the above mixed solution, add 200-500mL of 0.01-0.1mol/L potassium permanganate aqueous solution dropwise under the action of mechanical stirring with a stirring speed of 200-400rpm. After the dropwise addition is completed, continue stirring the mixed solution for 0.5 to 5 hours. After completion, it was purified by suction filtration and vacuum dried for 24 hours to obtain the porous carbon and manganese dioxide composite supercapacitor electrode material.
本发明的优点在于：本发明将芦苇废料通过高温碳化得到多孔碳材料具有操作简便，产率高等优点，可实现工业化。本发明得到的多孔碳与二氧化锰复合材料具有工艺简单、成本低廉、导电性良好、循环稳定性好、热稳定性优异等优点，可作为电极材料应用到超级电容器中，具有良好的工业应用前景。The advantage of the present invention is that the porous carbon material obtained by carbonizing reed waste at high temperature has the advantages of simple operation and high yield, and can realize industrialization. The porous carbon and manganese dioxide composite material obtained by the present invention has the advantages of simple process, low cost, good conductivity, good cycle stability, excellent thermal stability, etc., can be used as an electrode material in supercapacitors, and has good industrial applications. prospect.
图1为实施例2复合电极材料在不同扫描速度的循环伏安曲线，其中横坐标为电位，纵坐标为电流。Figure 1 is the cyclic voltammetry curve of the composite electrode material of Example 2 at different scanning speeds, in which the abscissa is the potential and the ordinate is the current.
图2为实施例2复合电极材料的电镜照片。Figure 2 is an electron microscope photograph of the composite electrode material of Example 2.
实施例1：Example 1:
(1)将芦苇废料放入管式马弗炉中，在氮气的保护下，升温至700℃，保温2h，冷却后得到碳材料。将碳材料放入研钵中，加入相同质量的氢氧化钾粉末，研磨30min放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，通过水洗、抽滤，直至中性，真空干燥24h，得到多孔碳材料，记作C-700。(1) Put the reed waste into a tubular muffle furnace, raise the temperature to 700°C under the protection of nitrogen, keep it warm for 2 hours, and obtain the carbon material after cooling. Put the carbon material into a mortar, add the same mass of potassium hydroxide powder, grind it for 30 minutes and put it into a tubular muffle furnace. Under the protection of nitrogen, raise the temperature to 800°C, keep it for 2 hours, wash it with water, and filter it until Neutral and vacuum dried for 24 hours, a porous carbon material was obtained, which was recorded as C-700.
(2)常温下，多孔碳材料在频率为30kHz超声波作用下分散在水溶液中0.5h，多孔碳材料的浓度为0.1wt/％。在上述混合溶液中，在搅拌转速为300rpm的机械搅拌作用下，逐滴加入250mL 0.02mol/L的高锰酸钾水溶液。滴加完成后，继续搅拌2h。经抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合材料(记作C-700-MnO
2-2h)。
(2) At normal temperature, the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%. In the above mixed solution, 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 2 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-700-MnO 2 -2h) was obtained.
实施例2：Example 2:
(1)将芦苇废料放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，冷却后得到碳材料。将碳材料放入研钵中，加入相同质量的氢氧化钾粉末，研磨30min放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，通过水洗、抽滤，直至中性，真空干燥24h，得到多孔碳材料，记作C-800。(1) Put the reed waste into a tubular muffle furnace, raise the temperature to 800°C under the protection of nitrogen, keep it warm for 2 hours, and obtain the carbon material after cooling. Put the carbon material into a mortar, add the same mass of potassium hydroxide powder, grind it for 30 minutes and put it into a tubular muffle furnace. Under the protection of nitrogen, raise the temperature to 800°C, keep it for 2 hours, wash it with water, and filter it until Neutral and vacuum dried for 24 hours, a porous carbon material was obtained, which was recorded as C-800.
(3)常温下，多孔碳材料在频率为30kHz超声波作用下分散在水溶液中0.5h，多孔碳材料的浓度为0.1wt/％。在上述混合溶液中，在搅拌转速为300rpm的机械搅拌作用下，逐滴加入250mL 0.02mol/L的高锰酸钾水溶液。滴加完成后，继续搅拌1h。经抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合材料(记作C-800-MnO
2-1h)。
(3) At normal temperature, the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%. In the above mixed solution, 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 1 hour. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-800-MnO 2 -1h) was obtained.
实施例3：Example 3:
(1)将芦苇废料放入管式马弗炉中，在氮气的保护下，升温至1000℃，保温2h，冷却后得到碳材料。将碳材料放入研钵中，加入相同质量的氢氧化钾粉末，研磨30min放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，通过水洗、抽滤，直至中性，真空干燥24h，得到多孔碳材料，记作C-1000。(1) Put the reed waste into a tubular muffle furnace, raise the temperature to 1000°C under the protection of nitrogen, keep it warm for 2 hours, and obtain the carbon material after cooling. Put the carbon material into a mortar, add the same mass of potassium hydroxide powder, grind it for 30 minutes and put it into a tubular muffle furnace. Under the protection of nitrogen, raise the temperature to 800°C, keep it for 2 hours, wash it with water, and filter it until Neutral and vacuum dried for 24 hours, a porous carbon material was obtained, which was recorded as C-1000.
(2)常温下，多孔碳材料在频率为30kHz超声波作用下分散在水溶液中0.5h，多孔碳材料的浓度为0.1wt/％。在上述混合溶液中，在搅拌转速为300rpm的机械搅拌作用下，逐滴加入250mL 0.02mol/L的高锰酸钾水溶液。滴加完成后，继续搅拌2h。经抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合材料(记作C-1000-MnO
2-2h)。
(2) At normal temperature, the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%. In the above mixed solution, 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 2 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-1000-MnO 2 -2h) was obtained.
实施例4：Example 4:
(1)将芦苇废料放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，冷却后得到碳材料。将碳材料放入研钵中，加入相同质量的氢氧化钾粉末，研磨30min放入管式马弗炉中，在氮气的保护下，升温至800℃，保温2h，通过水洗、抽滤，直至中性，真空干燥24h，得到多孔碳材料，记作C-800。(1) Put the reed waste into a tubular muffle furnace, raise the temperature to 800°C under the protection of nitrogen, keep it warm for 2 hours, and obtain the carbon material after cooling. Put the carbon material into a mortar, add the same mass of potassium hydroxide powder, grind it for 30 minutes and put it into a tubular muffle furnace. Under the protection of nitrogen, raise the temperature to 800°C, keep it for 2 hours, wash it with water, and filter it until Neutral and vacuum dried for 24 hours, a porous carbon material was obtained, which was recorded as C-800.
(2)常温下，多孔碳材料在频率为30kHz超声波作用下分散在水溶液中 0.5h，多孔碳材料的浓度为0.1wt/％。在上述混合溶液中，在搅拌转速为300rpm的机械搅拌作用下，逐滴加入250mL 0.02mol/L的高锰酸钾水溶液。滴加完成后，继续搅拌5h。经抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合材料(记作C-800-MnO
2-5h)。
(2) At normal temperature, the porous carbon material is dispersed in the aqueous solution for 0.5h under the action of ultrasonic waves with a frequency of 30kHz, and the concentration of the porous carbon material is 0.1wt/%. In the above mixed solution, 250 mL of 0.02 mol/L potassium permanganate aqueous solution was added dropwise under mechanical stirring with a stirring speed of 300 rpm. After the dropwise addition is completed, continue stirring for 5 hours. After purification by suction filtration and vacuum drying for 24 hours, the porous carbon and manganese dioxide composite material (recorded as C-800-MnO 2 -5h) was obtained.
以上所述仅为本发明的交叉实例而已，并不用以限制本发明，对本领域技术人员来说很显然可以做很多的改进，凡在本发明的精神和原则之内，所做的任何修改、同等替换、改进等，均应包含在本发明保护的范围之内。The above are only cross-examples of the present invention and are not intended to limit the present invention. It is obvious to those skilled in the art that many improvements can be made. Any modifications, Equivalent substitutions, improvements, etc. shall be included in the scope of protection of the present invention.
Claims (6)
- 一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，包括如下步骤：A method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials, including the following steps:(1)芦苇废料的热解；(1) Pyrolysis of reed waste;(2)多孔碳材料的制备。(2) Preparation of porous carbon materials.(3)多孔碳与二氧化锰复合超级电容器电极材料的制备。(3) Preparation of porous carbon and manganese dioxide composite supercapacitor electrode materials.
- 如权利要求1所述的一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，其特征在于：步骤(1)所述的芦苇废料的热解是指在惰性气体的保护下，将芦苇废料放入管式马弗炉中，在700～1000℃下进行碳化3～8h，冷却后得到碳材料。A method for preparing a porous carbon and manganese dioxide composite supercapacitor electrode material as claimed in claim 1, characterized in that: the pyrolysis of the reed waste in step (1) refers to pyrolysis of the reed waste under the protection of an inert gas. The reed waste is put into a tubular muffle furnace and carbonized at 700 to 1000°C for 3 to 8 hours. After cooling, the carbon material is obtained.
- 如权利要求1所述的一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，其特征在于：步骤(1)所述的惰性气体为氮气或氩气。A method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials as claimed in claim 1, characterized in that: the inert gas in step (1) is nitrogen or argon.
- 如权利要求1所述的一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，步骤(2)所述的多孔碳材料的制备是指将步骤(1)中所述的碳材料中，加入强碱物质，放入管式马弗炉中，在700～1000℃下进行活化3～8h，冷却后得到多孔碳材料。通过水洗、抽滤、洗涤、真空干燥得到多孔电极材料。A method for preparing a porous carbon and manganese dioxide composite supercapacitor electrode material as claimed in claim 1, the preparation of the porous carbon material in step (2) means adding the carbon material described in step (1) to , add a strong alkali substance, put it into a tubular muffle furnace, activate it at 700-1000°C for 3-8 hours, and obtain porous carbon materials after cooling. The porous electrode material is obtained through water washing, suction filtration, washing, and vacuum drying.
- 如权利要求1所述的一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，步骤(2)所述的强碱物质是指氢氧化钾、氢氧化钠等。A method for preparing porous carbon and manganese dioxide composite supercapacitor electrode materials as claimed in claim 1, wherein the strong alkaline substance in step (2) refers to potassium hydroxide, sodium hydroxide, etc.
- 如权利要求1所述的一种多孔碳与二氧化锰复合超级电容器电极材料的制备方法，步骤(3)多孔碳与二氧化锰复合材料的制备是指将步骤(2)所述的碳材料在频率为30～50kHz超声波作用下分散在水溶液中0.5～2h，碳材料的浓度为0.05～0.5wt/％。在上述混合溶液中，在搅拌转速为200～400rpm的机械 搅拌作用下，逐滴加入200-500mL 0.01～0.1mol/L的高锰酸钾水溶液。滴加完成后，将混合溶液继续搅拌0.5～5h。结束后，抽滤提纯，真空干燥24h，得到多孔碳与二氧化锰复合超级电容器电极材料。The preparation method of a porous carbon and manganese dioxide composite supercapacitor electrode material as claimed in claim 1. The preparation of the porous carbon and manganese dioxide composite material in step (3) refers to the carbon material described in step (2). It is dispersed in an aqueous solution for 0.5 to 2 hours under the action of ultrasonic waves with a frequency of 30 to 50 kHz, and the concentration of the carbon material is 0.05 to 0.5wt/%. In the above mixed solution, add 200-500mL of 0.01-0.1mol/L potassium permanganate aqueous solution dropwise under the action of mechanical stirring with a stirring speed of 200-400rpm. After the dropwise addition is completed, continue stirring the mixed solution for 0.5 to 5 hours. After completion, it was purified by suction filtration and vacuum dried for 24 hours to obtain the porous carbon and manganese dioxide composite supercapacitor electrode material.
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