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Preparation method of carbon material for supercapacitor, carbon material and application of carbon material

A technology for supercapacitors and carbon materials, applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve problems such as hindering the performance of supercapacitors, insufficient specific surface area, internal resistance increase and attenuation, etc., to improve reaction participation Probability and degree of reaction, promotion of pore formation, effect of reducing ash content

Pending Publication Date: 2020-11-17
TAIYUAN UNIV OF TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The core material of supercapacitors is carbon materials. At present, carbon materials are mainly prepared by alkali activation method for supercapacitors. However, there are problems such as low ash content, high specific surface area, small number of micropores, low specific capacitance and large internal resistance. Defects that hinder the improvement of supercapacitor performance
The main reason is that most of the alkali melts and adheres to the reactor due to the direct mixing and activation of the carbon-containing precursor with the alkali, resulting in insufficient activation and low capacitance; there is also no subsequent washing to reduce ash and reduce deoxygenation functional groups, resulting in internal Impedance rise and attenuation are obvious

Method used

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  • Preparation method of carbon material for supercapacitor, carbon material and application of carbon material
  • Preparation method of carbon material for supercapacitor, carbon material and application of carbon material

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preparation example Construction

[0039] One embodiment of the present invention provides a method for preparing carbon materials for supercapacitors, comprising the following steps:

[0040] Step 102, pretreating a certain amount of raw coal and gasification slag-enriched charcoal and uniformly mixing with a certain amount of co-activator, and performing high-temperature activation treatment;

[0041] Step 104, mixing the first product obtained after the high-temperature activation treatment with a certain amount of acid-alcohol mixture, heating and stirring, suction filtering, washing, drying after the reaction, and setting aside;

[0042] Step 106, reacting the second product obtained in step 104 with a certain amount of mixed gas of nitrogen and hydrogen at high temperature.

[0043] As a preferred embodiment, in step 102, the pretreatment includes: mixing a certain amount of raw coal and gasification slag-enriched carbon with a certain amount of strong acid solution, heating and stirring, suction filtrati...

Embodiment 1

[0061] The present embodiment provides a kind of preparation method of supercapacitor carbon material, comprises the following steps:

[0062] (1) Mix 800g of anthracite, 200g of palm shell gasification slag, and 600g of perchloric acid, heat to 90°C and stir for 4 hours at a constant temperature. After the reaction is completed, introduce the reaction solution into a funnel for suction filtration, and repeatedly wash with deionized water until the filtrate becomes neutral. , dried in a vacuum oven at 150°C for 10 hours to obtain a pre-oxidized precursor;

[0063] (2) The pre-oxidized precursor obtained in step (1) was carbonized in a high-temperature tube furnace from room temperature to 550°C for 5 hours, and the temperature was naturally cooled to room temperature to obtain a carbonized precursor;

[0064] (3) 400g of the carbonized precursor obtained in step (2) and 800g of sodium hydroxide were uniformly mixed at a stirring speed of 500r / min, and then ground into a 200-me...

Embodiment 2

[0074] The present embodiment provides a kind of preparation method of supercapacitor carbon material, comprises the following steps:

[0075] (1) Mix 1000g of coking coal, 400g of bituminous coal gasification slag, and 800g of concentrated sulfuric acid and heat it to 75°C for 6h at a constant temperature. Dry in a drying oven at 110°C for 12 hours to obtain a pre-oxidized precursor;

[0076] (2) The pre-oxidized precursor obtained in step (1) was carbonized in a high-temperature tube furnace from room temperature to 750°C for 3.5 hours, and then naturally cooled to room temperature to obtain a carbonized precursor;

[0077] (3) 500g of the carbonized precursor obtained in step (2) and 1500g of potassium carbonate were uniformly mixed at a stirring speed of 500r / min, and then ground into a 250-mesh fine powder in a ball mill;

[0078] (4) The fine powder obtained in step (3) was placed on a flat die roller compactor for 4 hours under a pressure of 17 MPa, and then extruded i...

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Abstract

The invention provides a preparation method of a carbon material for a supercapacitor, the carbon material and application of the carbon material, and the preparation method of the carbon material forthe supercapacitor comprises the following steps: step 102, pretreating a certain amount of raw coal and gasified slag enriched carbon, then performing uniform mixing with a certain amount of co-activator, and carrying out high-temperature activation treatment; and step 104, mixing the first product obtained after high-temperature activation treatment with a certain amount of an acid-alcohol mixed solution, performing heating and stirring, and carrying out suction filtration, washing and drying after the reaction is finished for later use. According to the preparation method, the raw materials are cheap and easy to obtain, the process is simple and controllable, the operation conditions are mild, industrial production can be achieved, and the carbon material prepared through the preparation method has the characteristics of being high in specific surface area, high in specific capacitance, small in internal resistance and the like.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a preparation method of a carbon material for a supercapacitor, a carbon material and an application thereof. Background technique [0002] Activated carbon for supercapacitors can be widely used in new energy storage devices such as supercapacitors and lead-carbon batteries, and then connected to new energy vehicles, wind power generation, high-speed rail, communication base stations, aerospace and military industries and other fields. The core material of supercapacitors is carbon materials. At present, carbon materials are mainly prepared by alkali activation method for supercapacitors. However, there are problems such as low ash content, high specific surface area, small number of micropores, low specific capacitance and large internal resistance. Defects hinder the improvement of supercapacitor performance. The main reason is that most of the alkali melts and adheres to the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/324C01B32/348C01B32/354H01G11/24H01G11/32
CPCC01B32/318C01B32/324C01B32/348C01B32/382H01G11/24H01G11/32Y02E60/13
Inventor 王建成张长明霍启煌陈慧君
Owner TAIYUAN UNIV OF TECH
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