Preparation methods and application of porous carbon from towel gourd vegetable sponge and composite material of porous carbon

A composite material, porous carbon technology, applied in hybrid capacitor electrodes, structural parts, electrical components, etc., can solve the problems of difficult specific surface area, insufficient performance of supercapacitors and oxygen reduction catalysts, and achieve high specific surface area and good supercapacitor performance. and oxygen reduction catalytic performance, the effect of high adsorption activity

Inactive Publication Date: 2014-10-22
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still difficult to obtain an ideal specific surface area by using this method, and the performance as a supercapacitor and an oxygen reduction catalyst is still insufficient.

Method used

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  • Preparation methods and application of porous carbon from towel gourd vegetable sponge and composite material of porous carbon
  • Preparation methods and application of porous carbon from towel gourd vegetable sponge and composite material of porous carbon
  • Preparation methods and application of porous carbon from towel gourd vegetable sponge and composite material of porous carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Implementation Example 1: Preparation of porous carbon.

[0047] Put the chopped, washed loofah in the NH 3 Carry out carbonization treatment at 800°C in the atmosphere, the heating rate is 8°C / min, the holding time is 2h, NH 3 The flow rate is 60ml / min.

[0048] Mix the carbonized loofah and KOH at a mass ratio of 1:2, 2 Activated at 750°C for 1.5h. The product is washed with dilute hydrochloric acid and deionized water until the filtrate is neutral, and dried in a drying oven to obtain the porous carbon with a yield of about 11.5%.

Embodiment 2

[0049] Implementation Example 2: Preparation of porous carbon.

[0050] Put the chopped, washed loofah in the NH 3 Carry out carbonization treatment at 800°C in the atmosphere, the heating rate is 8°C / min, the holding time is 2h, NH 3 The flow rate is 60ml / min.

[0051] Mix the carbonized loofah and KOH at a mass ratio of 1:4, 2 Activated at 750°C for 1.5h. The product is washed with dilute hydrochloric acid and deionized water until the filtrate is neutral, and dried in a drying oven to obtain the porous carbon with a yield of about 8.3%.

Embodiment 3

[0052] Implementation Example 3: Preparation of Porous Carbon

[0053] Put the chopped, washed loofah in the NH 3 Carry out carbonization treatment at 900°C in the atmosphere, the heating rate is 8°C / min, the holding time is 2h, NH 3 The flow rate is 60ml / min.

[0054] Mix the carbonized loofah and KOH at a mass ratio of 1:2, 2 Activated at 750°C for 1.5h. The product is washed with dilute hydrochloric acid and deionized water until the filtrate is neutral, and dried in a drying oven to obtain the porous carbon with a yield of about 9.5%.

[0055] figure 1 is the SEM picture of the prepared porous carbon. It can be seen that the porous carbon prepared by the present invention is cylindrical, with a diameter of about 190 μm, and contains many parallel and densely arranged channels in the inside of the fiber, forming a cellular structure of a honeycomb. The opening of the channels is polygonal. Its diameter is about 1-15 μm, and the thickness of the hole wall is between 0....

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Abstract

The invention relates to preparation methods of porous carbon from towel gourd vegetable sponge and a composite material of the porous carbon and application of the porous carbon and the composite material in supercapacitor electrode materials. The method for preparing the porous carbon comprises the following steps: (1) washing the towel gourd vegetable sponge, and performing carbonization heat treatment in an atmosphere containing NH3 at a proper temperature; (2) mixing the carbonized product and KOH in a proper proportion, and activating in N2 at the temperature of 750 DEG C. The inner diameter of pore passages of the prepared porous carbon is between 1mu m and 15mu m, the pore wall thickness is between 0.3mu m and 1mu m, and the activated specific surface area can be 1510m<2>/g. The method for preparing the composite material comprises the following steps: reacting the porous carbon with a KMnO4 solution, and growing MnO2 nanosheets, thereby obtaining a porous carbon/MnO2 composite material; or reacting the porous carbon with aniline to obtain a porous carbon/aniline composite material. When serving as the supercapacitor electrode materials, the prepared porous carbon and the composite material thereof have more excellent performance and favorable application prospect compared with a conventional carbon material.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a preparation method of porous carbon and composite materials thereof and their application as supercapacitor electrode materials and fuel cell oxygen reduction catalysts. Background technique [0002] Carbon material is an excellent adsorption material prepared by using bio-organic substances (nut shells, coal, asphalt, polymers, etc.), which has the characteristics of developed pores, strong adsorption capacity, and chemical stability. It is widely used in decolorization and deodorization, gas Separation, water purification and catalysts and many other fields. In recent years, the use of carbon-based materials as electrochemical catalysts has been the core issue of concern. For example, carbon materials have good electric double layer properties and the advantages of cycle charge and discharge are widely used in supercapacitors. Nitrogen-doped carbon, due to its cheap avai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08H01M4/90H01G11/44
CPCY02E60/13Y02E60/50
Inventor 于杰李健鹏
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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