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Preparation method of MOF-derived porous carbon electrode

A technology for deriving carbon and electrodes, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc. It can solve problems such as difficulty in scaling up and commercialization, difficulty in maintaining a two-dimensional structure, and the need for toxic solvents.

Inactive Publication Date: 2019-06-21
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 its preparation takes a long time, requires toxic solvents, and further processing is difficult to maintain the two-dimensional structure, and it is also difficult to scale up and commercialize.

Method used

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  • Preparation method of MOF-derived porous carbon electrode
  • Preparation method of MOF-derived porous carbon electrode
  • Preparation method of MOF-derived porous carbon electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First take 2gZn(NO 3 ) 2 ·6H 2 O, a mixture of 1g 2-methylimidazole and 0.1g sodium dodecylbenzenesulfonate and PVP was dissolved in 50ml of water and stirred, centrifuged to obtain the prepared MOF material, calcined in a tube furnace at 600°C for 1 hour, and taken out after cooling to obtain MOF Derived carbon samples. Then wet mix it with KOH at a ratio of 1:2, calcinate in a tube furnace at 6000C for 1 hour, take out the sample, pickle and dry it, and obtain the MOF-derived carbon material regulated by KOH. The prepared porous carbon has a large specific surface area and pore volume. The specific capacitance, galvanostatic charge-discharge and cyclic voltammetry curves of the prepared materials were entered into figure 1 , figure 2 with image 3 shown.

Embodiment 2

[0014] This example is basically the same as Example 1, except that the amount of activator KOH is different, and the mass ratio of sample to KOH is 1:3. The galvanostatic charge-discharge and cyclic voltammetry curves of the prepared materials are as follows: figure 2 shown.

Embodiment 3

[0016] This example is basically the same as Example 1, except that the amount of activator KOH is different, and the mass ratio of sample to KOH is 1:4. The galvanostatic charge-discharge and cyclic voltammetry curves of the prepared materials are as follows: image 3 shown.

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Abstract

The invention relates to a template-free two-dimensional MOF-derived carbon electrode material which is synthesized in one step at normal temperature and has high performance. According to the preparation method of the electrode material, Zn(NO3)2.6H2O, 2-methylimidazole and a surfactant are used as a raw materials, and the raw materials are synthesized in one step and then calcined to prepare anMOF-derived carbon electrode with a two-dimensional structure, wherein the 2-methylimidazole provides an N source, and the surfactant is added to increase the specific surface area. The MOF-derived carbon electrode is further activated to further control the pore structure, so that the structure of the prepared electrode structure is further optimized and then the electrode material with reasonable pore distribution and superior performance is formed. The prepared electrode material has reasonable pore size distribution, large specific surface area and high specific capacitance, is capable ofsolving the problem of adding a template and a toxic solvent in the process of synthesizing a two-dimensional MOF, is simple and convenient in preparation process and easy to get raw materials, accords with the needs of sustainable development, and is expected to achieve large-scale use in the field of supercapacitors and new energy materials.

Description

[0001] Technical field: [0002] The invention relates to the fields of supercapacitors and new energy materials, in particular to a method for preparing a high specific capacitance metal-organic framework (MOF) derived carbon electrode. [0003] Background technique: [0004] The superior power performance of supercapacitors has attracted much attention in the fast charge and discharge component market, and its advantages are well known. Although there are many advantages of supercapacitors, there is still a certain gap between reality and ideal. With the goal of improving capacitive energy storage, the preparation of electrode materials with high energy density is the focus of current supercapacitor research. Among them, the electrode material is a key factor affecting the performance of supercapacitors. The improvement of the specific capacitance of the electrode material plays an important role in improving the energy density of the supercapacitor. Carbon electrodes are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/26H01G11/86
CPCY02E60/13
Inventor 李昕李向阳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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