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A method to improve the performance of carbide-derived carbon supercapacitors

A carbide-derived carbon and supercapacitor technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, etc., can solve the problems that restrict the development of supercapacitor electrode materials and the low specific capacitance value of carbide-derived carbon, and achieve excellent supercapacitor performance , good electric double layer characteristics, and the effect of improving the utilization rate

Active Publication Date: 2019-02-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low specific capacitance of carbide-derived carbon has always restricted its development as an electrode material for supercapacitors.

Method used

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  • A method to improve the performance of carbide-derived carbon supercapacitors
  • A method to improve the performance of carbide-derived carbon supercapacitors
  • A method to improve the performance of carbide-derived carbon supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Using titanium carbide (TiC) with a particle size of about 2 μm as the reaction precursor, the high-temperature halogenation method was used to react with chlorine gas at 800 °C for 1 hour to obtain titanium carbide-derived carbon (TiC-CDC-800), and then the prepared The obtained TiC-CDC-800 was placed in the prepared HNO 3 and HF mixed acid solution In the process, after 1 hour of ultrasonic vibration, the TiC-CDC-800 and the prepared mixed acid solution were transferred together into a plastic test tube and the test tube mouth was sealed. The part of the test tube with mixed solution and TiC-CDC-800 sample is completely submerged, and after standing for 240 hours, wash the TiC-CDC-800 with deionized water until it is neutral, and dry it in a blast drying oven at 80°C , that is, the treatment of TiC-CDC-800 is completed.

[0018] The measurement of the specific capacity of the treated TiC-CDC-800: a conventional three-electrode system is used, the mercury oxide elec...

Embodiment 2

[0022] Titanium carbide (TiC) with a particle size of about 50nm was used as the reaction precursor, and titanium carbide-derived carbon (TiC-CDC-600) was obtained after reacting with chlorine gas at 600°C for 1 hour by high-temperature halogenation method. Then, the prepared TiC-CDC-600 was placed in the prepared HNO 3 and HF mixed acid solution After 1 hour of ultrasonic vibration, the TiC-CDC-600 and the prepared mixed acid solution were transferred into a plastic test tube and the test tube mouth was sealed. After that, the test tube was placed vertically in a constant temperature water bath at 25°C to make The part of the test tube with mixed solution and TiC-CDC-600 sample is completely submerged, and after standing for 192 hours, wash the TiC-CDC-600 with deionized water until it is neutral, and dry it in a blast drying oven at 80°C , that is, the treatment of TiC-CDC-600 is completed.

[0023] Measure by the method for embodiment 1, under 5mV / s scanning speed, the s...

Embodiment 3

[0025] Using silicon carbide (SiC) with a particle size of about 60nm as the reaction precursor, the high-temperature halogenation method was used to react with chlorine gas at 800°C for 1 hour to obtain silicon carbide-derived carbon (SiC-CDC-800), and then the prepared The obtained SiC-CDC-800 was placed in the prepared HNO 3 and HF mixed acid solution After ultrasonic vibration for 1 hour, transfer SiC-CDC-800 and the prepared mixed acid solution together into a plastic test tube and seal the test tube mouth. The part of the test tube with the mixed solution and SiC-CDC-800 sample is completely submerged. After standing for 264 hours, wash the SiC-CDC-800 with deionized water until neutral, and dry it in a blast drying oven at 80°C. , that is, the processing of SiC-CDC-800 is completed.

[0026] Measured according to the method of Example 1, at a scanning speed of 5mV / s, its specific capacitance value increased to 219F / g, while the specific capacitance value of untreated...

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Abstract

The invention relates to a method for improving carbide derived carbon super capacitor performance. The method mainly comprises steps that firstly, acid solution of nitric acid and hydrofluoric acid is prepared according to a mole proportion of MHNO3:MHF of 1:2-2:1, secondly, to-be-treated carbide derived carbon is completely dipped into the acid solution, through ultrasonic concussion, air left on the carbide derived carbon is removed, under the 25-40 DEG C environment temperature, standing dipping for 48-264 hours is carried out, and lastly, washing is carried out till neutral property is realized, drying is then carried out, treatment on the carbide derived carbon is accomplished. The method is advantaged in that the method is simple and easy, cycle utilization of the acid solution can be realized, a raw material utilization rate is high, on the condition that excellent power characteristics of the carbide derived carbon and double electric layer characteristics are kept, a specific capacitance value is substantially improved, and excellent super capacitor performance is presented.

Description

technical field [0001] The invention relates to a novel carbon material, in particular to a method for improving the performance of carbon capacitance. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device between conventional capacitors and secondary batteries. On the basis of retaining the ultra-long cycle characteristics of traditional capacitors, it greatly improves its specific capacity and at the same time makes up for the shortcomings of poor battery power characteristics, and plays an irreplaceable role in replacing fossil fuels with electric energy as the energy source for high-power equipment. Low development cost, good electrochemical energy storage performance, and environmentally friendly electrode materials are of great significance for the commercialization of supercapacitors, such as electric vehicles, safety doors for jet aircraft, pulsed lasers, cranes, and consumer electronics. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86
CPCY02E60/13
Inventor 张瑞军刘康刘厅刘岩岩
Owner YANSHAN UNIV
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