Preparation of an inorganic salt-derived porous carbon electrode

A porous carbon electrode and electrode technology, applied in the direction of inorganic chemistry, carbon compounds, non-metallic elements, etc., can solve complex process conditions, a large number of corrosive compounds and other problems, and achieve the effect of improving the use of problems

Inactive Publication Date: 2019-02-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has several disadvantages, such as the need for a large amo

Method used

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  • Preparation of an inorganic salt-derived porous carbon electrode
  • Preparation of an inorganic salt-derived porous carbon electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] A certain amount of potassium benzoate was taken and calcined in a tubular atmosphere furnace at 700°C for 2 hours under a nitrogen atmosphere, the sample was taken out, washed with dilute hydrochloric acid after cooling, and porous carbon was obtained after drying. The specific capacitance, galvanostatic charge-discharge and cyclic voltammetry curves of the prepared materials are as follows: figure 1 shown.

Embodiment 2

[0010] The steps of this example and Example 1 are basically the same, the difference is that the calcination temperature is 600°C, and the specific capacitance, constant current charge and discharge and cyclic voltammetry curves of the prepared material are as follows figure 1 shown.

Embodiment 3

[0012] The steps of this example and Example 1 are basically the same, the difference is that the calcination temperature is 800°C, and the specific capacitance, galvanostatic charge-discharge and cyclic voltammetry curves of the prepared material are as follows: figure 1 shown.

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Abstract

The invention relates to preparation of an inorganic salt-derived porous carbon electrode, particularly relates to preparation of porous carbon from potassium benzoate through one-step carbonization without additives or one-step improvement of the performance of the porous carbon by adding an activating agent, and belongs to the fields of supercapacitors and new energy materials. An electrode preparation method adopts the potassium benzoate as a raw material to prepare porous carbon without the need of additives, and a prepared carbon electrode has properties not worse than those of supercapacitor porous carbon electrodes prepared by a plurality of complex methods. If an activating agent is added during preparation for activation, the properties can be further improved. Potassium benzoateis abundant and inexpensive, and potassium carbonate is generated during high-temperature carbonization to etch a carbon skeleton to produce a porous structure, which can effectively reduce the use ofa large number of corrosive compounds. The raw material is easily available, the preparation process is simple, and the conditions are mild. The pore size is adjustable, the electrochemical performance is superior, and the porous carbon electrode is very suitable for large-scale production.

Description

Technical field: [0001] The invention relates to the field of supercapacitors and new energy materials, in particular to the preparation of a porous carbon electrode derived from inorganic salts. Background technique: [0002] As an important part of supercapacitors, electrode materials are the key to determine the performance of supercapacitors. Porous carbon materials are currently the most widely studied and applied electrode materials in commercial electric double layer capacitors. Carbon materials with porous structure are widely used in supercapacitor electrode materials due to their low cost, high specific surface area and wide range of sources. In order to improve the performance of supercapacitors, domestic and foreign scholars have carried out extensive attention and research on electrode materials. Throughout the research on porous carbon electrodes at home and abroad, most of them focus on the improvement of material preparation and structure regulation. Gener...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/348
CPCC01B32/318C01B32/348
Inventor 李昕周江奇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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