Preparation method of carbon sol for electrode material, capacitive energy storage device and application

An electrode material and capacitive energy storage technology, applied in chemical instruments and methods, hybrid capacitor electrodes, carbon compounds, etc., can solve the problem of poor comprehensive performance of carbon materials, high conductivity specific surface area, controllable pore structure stability, and easy processing Issues such as compatibility and composite compatibility

Active Publication Date: 2020-05-08
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a preparation method, capacitive energy storage device and application of carbon sol for electrode materials, in order to solve the problem that existing preparation methods cannot achieve high conductivity, high specific surface area, and Pore ​​control structure, high stability, easy processability and composite compatibility, high purity and relatively controllable low cost are balanced, leading to the problem of poor comprehensive performance of carbon materials

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  • Preparation method of carbon sol for electrode material, capacitive energy storage device and application
  • Preparation method of carbon sol for electrode material, capacitive energy storage device and application
  • Preparation method of carbon sol for electrode material, capacitive energy storage device and application

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[0036] A specific embodiment of the present invention discloses a method for preparing an ultra-high specific surface carbon sol, comprising the following steps:

[0037] Step 1: Take diphenyl ether / polyethylene glycol 400 as the dispersion medium, add a catalyst to the dispersion medium, and raise the temperature to 60-170°C under high-speed stirring, preferably 90-150°C;

[0038] Step 2: adding a thermosetting resin reaction solution to the dispersion medium, and polymerizing to form a carbon sol precursor material;

[0039] Step 3: The generated carbon sol precursor material is separated from the dispersion medium, the solid is washed three times with petroleum ether (boiling point 60-90° C.), and dried in a nitrogen stream.

[0040] Step 4: Carrying out primary carbonization of the carbon sol precursor material obtained in step 3 at a temperature of 600-900°C, preferably 650-900°C;

[0041] Step 5: mixing the primary carbonized carbon sol precursor material with potassium...

Embodiment 1

[0061] The preparation process of phenolic resin prepolymer (Resols resin) is according to literature (D.Broun, H.Cherdron, M.Rehahn, H.Ritter, B.Viot, Polymer Synthesis: Theory and Practice, Fourth Edition, Springer, 2005, pp. 299) method implementation. The above prepolymerized phenolic resin is used to configure the reaction solution, and the suspension polymerization process is carried out according to the condition data listed in Table 1.

[0062] The precursor material prepared above is subjected to primary carbonization treatment, the primary carbonization treatment is carried out in a corundum tube, and the treated samples are placed in a corundum crucible. The temperature of the treatment was 600°C. The entire primary carbonization process is carried out under a nitrogen protective atmosphere, and the nitrogen flow rate is 60 ml / min. The primary carbonization treatment time was 3.0 hours. The treated material was cooled to room temperature in a nitrogen stream. Th...

Embodiment 2

[0071] The reaction solution was prepared from furan methanol, and the suspension polymerization process was implemented according to the condition data listed in Table 3.

[0072] The precursor material prepared above is subjected to primary carbonization treatment, the primary carbonization treatment is carried out in a corundum tube, and the treated samples are placed in a corundum crucible. The temperature of the treatment was 700°C. The entire primary carbonization process is carried out under a nitrogen protective atmosphere, and the nitrogen flow rate is 300 ml / min. The primary carbonization treatment time was 2.0 hours. The treated material was cooled to room temperature in a nitrogen stream. The primary carbonized material is activated in a high temperature resistant stainless steel tube, and the mixed sample of carbon powder and potassium hydroxide is placed in a nickel box. Wherein the mass ratio of potassium hydroxide to carbon powder is 4.5:1. The temperature ...

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Abstract

The invention relates to a preparation method of carbon sol for an electrode material, a capacitive energy storage device and application, belongs to the technical field of energy storage device materials, and solves the problem of poor comprehensive performance of a carbon material due to the fact that an existing preparation method cannot balance relatively high conductivity, high specific surface area, controllable pore structure, relatively high stability, processability, composite compatibility, relatively high purity and relatively low cost. The preparation method of the carbon sol for the electrode material comprises the following steps: adding a catalyst into dispersion medium diphenyl ether / polyethylene glycol 400, and heating; adding a thermosetting resin reaction solution into the dispersion medium, carrying out suspension polymerization reaction to generate a carbon sol precursor material, and separating to obtain the carbon sol precursor material; and carrying out activation processing on the carbon sol precursor material to obtain the carbon sol. By changing the existence form of the carbon material for the electrode material, the specific surface area is greatly increased, and the capacity of the capacitive energy storage device is increased.

Description

technical field [0001] The invention relates to the technical field of energy storage device materials, in particular to a preparation method of carbon sol used for electrode materials, a capacitive energy storage device and its application. Background technique [0002] With the rapid development of green energy storage devices, supercapacitor energy storage devices have the advantages of both high specific energy and high specific power, and have gradually become a new type of energy storage device with important development potential in the field of energy storage. [0003] There are three main types of electrode materials currently used for supercapacitors: carbon materials, metal oxide materials, and conductive polymer materials. Carbon is the earliest electrode material used to make supercapacitors. Carbon electrode capacitors mainly utilize the energy of the electric double layer stored at the electrode / electrolyte interface, and its specific surface area is an impor...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/318H01G11/44H01G11/34
CPCC01B32/318C01B32/348H01G11/34H01G11/44
Inventor 李峰波袁国卿
Owner INST OF CHEM CHINESE ACAD OF SCI
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