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Stephanoporate carbon electrode material and preparation method thereof

A porous carbon electrode and mesoporous technology, which is applied in the manufacture of capacitors, hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problem of low micropore occupancy, achieve good stability, easy control, and specific electric capacity The effect of capacity increase

Inactive Publication Date: 2008-11-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although mesoporous carbon has obvious advantages as an electrode material for supercapacitors, the specific surface area of ​​the mesoporous carbon material directly synthesized by the template method is not too large, and the micropore occupancy rate is low, so its electrochemical capacity is still difficult to surpass. Activated carbon materials with large specific surface area limit their application in supercapacitor electrode materials to a large extent.

Method used

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  • Stephanoporate carbon electrode material and preparation method thereof
  • Stephanoporate carbon electrode material and preparation method thereof
  • Stephanoporate carbon electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Using the mesoporous silica molecular sieve MCM-48 with a cubic channel structure as a template, organic sucrose was used as a carbon precursor, and the ordered mesoporous carbon was prepared by template carbonization, and then at 850 °C, CO 2 The modified porous carbon material was obtained by treating under the atmosphere for 2 hours, and then prepared into an electrode for a supercapacitor. The specific surface area of ​​the MCM-48 used is 1736m 2 / g, the pore volume is 0.97cm 3 / g, BJH mesopore diameter is 2.4nm. First weigh 1g of MCM-48 and immerse it into a solution consisting of 1.10g of sucrose, 5g of deionized water and 0.14g of concentrated sulfuric acid, stir and mix thoroughly, and then heat at 100°C and 160°C for 6h respectively, and the obtained black The brown solid powder was again immersed in a solution consisting of 0.65g sucrose, 5g deionized water and 0.09g concentrated sulfuric acid, stirred thoroughly, and repeatedly heated at 100°C and 160°C for...

Embodiment 2

[0029] The method of the present embodiment is basically the same as that of Example 1, the difference is only: in the preparation process, CO 2 The post-treatment temperature is 950°C, and the treatment time is 4h. Then characterize its morphology, texture characteristics and electrochemical capacitive performance (electrolyte is 6M KOH). from figure 1 It can be seen from the above that the material is an ordered mesoporous arrangement structure, which is disordered in local areas, and its mesopore size ranges from 2 to 5 nm. In addition, there are a large number of micropores of 0.1 to 2 nm in the mesoporous wall. Secondary channels of porous carbon materials. The change of the specific capacitance of the electrode material at different scan rates is reflected in image 3 middle. Table 1 lists the specific test results of the electrode material.

Embodiment 3

[0031]Using the mesoporous silica molecular sieve SBA-15 with a hexagonal channel structure as a template and organic sucrose as a carbon precursor, the ordered mesoporous carbon was prepared by the template carbonization method, and then at 950 °C, CO 2 The modified porous carbon material was obtained by treating under the atmosphere for 4 hours, and then prepared as an electrode material for a supercapacitor. The specific surface area of ​​SBA-15 used is 675m 2 / g, the pore volume is 1.10cm 3 / g, BJH mesopore diameter is 9.3nm. First weigh 1g of SBA-15 and immerse it into a solution consisting of 1.25g of sucrose, 5g of deionized water and 0.14g of concentrated sulfuric acid, stir and mix well, then heat at 100°C and 160°C for 6h respectively, and the black The brown solid powder was again immersed in a solution consisting of 0.8g sucrose, 5g deionized water and 0.09g concentrated sulfuric acid, stirred thoroughly, and repeated heating at 100°C and 160°C for 6h respectivel...

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Abstract

The invention relates to a porous carbon electrode materials and the preparation method, belonging to the electrochemistry and the novel energy source materials, wherein the porous carbon electrode materials adopt the template carbonization and the method combined with the CO2 post-processing using the meso-porous oxide silicon as the remplate, and the cane sugar, furfuryl alcohol, polyacrylonitrile and the like as the precursors, through the technology steps of the liquid phase impregnation, the high temperature carbonization and the template removal and the like, then combines high temperature process, obtaining the super capacitor porous carbon electrode materials. The porous carbon electrode materials prepared by the method has high surface area, large pore volume, adjustable pore structure and multilevel-microporous pore structure, wherein the pore channel is composed of a meso-porous of 2-5 nm and the microporous with the meso-porous wall of 0.1-2 nm, so the electrochemistry capacity of the prepared porous carbon electrode is marked increased, and the integral property of good.

Description

technical field [0001] The invention relates to a porous carbon electrode material and a preparation method thereof. It belongs to the field of electrochemistry and new energy materials. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage element between batteries and traditional electrostatic capacitors. They have the characteristics of high specific capacity, high power, good cycle performance, long life, and wide operating temperature limit. Supercapacitors have higher power density than batteries and greater energy density than conventional capacitors. In recent years, with the miniaturization of electronic and electrical equipment and the continuous development of the electric vehicle industry, supercapacitors as backup power and memory backup devices have increasingly attracted people's attention. [0003] Electrode materials are the key to supercapacitor research, and one of the research hotspots ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/058H01G13/00C01B31/02H01G11/24H01G11/86
CPCY02E60/13
Inventor 高秋明夏开胜
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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