A kind of preparation method for the nano electrode material of supercapacitor

A supercapacitor and nano-electrode technology, applied in the field of electrochemistry, can solve the problems of reducing electrochemical performance, and achieve the effect of low price, wide source and good stability

Active Publication Date: 2017-03-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the 3D structure, the 2D structure limits the direct diffusion of electrolyte ions and electrons, thereby reducing its electrochemical performance.

Method used

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  • A kind of preparation method for the nano electrode material of supercapacitor
  • A kind of preparation method for the nano electrode material of supercapacitor
  • A kind of preparation method for the nano electrode material of supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method for the nanometer electrode material of supercapacitor, carry out according to the following steps:

[0026] (1) Preparation of melamine-phenolic resin precursor: Measure 0.5 mL of concentrated ammonia water (25wt%), 40 mL of absolute ethanol and 99.5 mL of deionized water to form a mixed solvent, and heat it while stirring under reflux condensation conditions (stirring rate is 2100rpm , heating power was 200 W), the temperature was raised to 70°C, 0.55 g of resorcinol and 0.74 mL of formaldehyde solution (37 wt %) were added after 30 min, and 0.315 g of melamine and 0.55 mL of formaldehyde solution (37 wt %) were added after 30 min of reaction. wt %), and continued to react for 24 h; then, the above mixed solution was transferred to a polytetrafluoroethylene autoclave at 120 °C for static hydrothermal reaction for 24 h; the added monomers resorcinol, melamine and formaldehyde were Polymerize to form melamine-phenolic resin; separate the rea...

Embodiment 2

[0032] Change the activator to K 2 CO 3 , and all the other steps are the same as in Example 1.

[0033] The transmission electron microscope (TEM) image of the obtained electrode material is shown in figure 1 b, the results show that the obtained nano-electrode material contains a large number of micropores and mesopores inside and on the surface, with high purity and basically no impurities, but no highly crystalline carbon nanosheets. Therefore, when the material is used as an electrode material for a supercapacitor , the specific capacitance is lower than that of the electrode material activated by KOH.

Embodiment 3-5

[0035] The amount of melamine was changed to 0.504, 0.63, 1.26 g in turn, and the corresponding amount of formaldehyde solution was changed to 0.884, 1.105, 2.21 mL when adding melamine and formaldehyde solution. All the other steps are the same as in Example 1.

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Abstract

The invention belongs to the technical field of electrochemistry, and discloses a method for preparing a nanoelectrode material of a super capacitor. The method includes the steps that 100 mL to 160 mL of mixed solvent is obtained, the mixed solvent is stirred and heated at the same time under the backflow condensation condition, temperature rises to 30 DEG C to 70 DEG C, a resorcinol and formaldehyde solution is added, a melamine and formaldehyde solution is added after reaction is conducted for 30 min to 60 min, reaction continues being conducted for 20 h to 24 h, the mixed solution is transferred to a polytetrafluoroethylene high-pressure kettle for static hydrothermal reaction at the temperature ranging from 100 DEG C to 120 DEG C for 20 h to 24 h, reaction liquid is separated, obtained sediment is washed and dried, and then melamine-phenolic resin precursors are obtained, wherein the mixed solvent is composed of 0.3 mL to 0.8 mL of stronger ammonia water, 0 to 96 mL of absolute ethyl alcohol and the balance being water. KOH is added to the obtained melamine-phenolic resin precursors, water is added until the KOH and the melamine-phenolic resin precursors are completely wetted and mixed evenly, in an inert atmosphere, temperature rises to the activation temperature ranging from 550 DEG C to 850 DEG C and is kept for 60 min to 120 min, activated products are washed and dried, and then the nanoelectrode material is obtained. The prepared electrode material has the 3D structure with both the hierarchical pore structure and a nanosheet layer, and the performance of ECs is improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically discloses a preparation method of a nanometer electrode material used for a supercapacitor. Background technique [0002] Supercapacitors (ECs), also known as electric double-layer capacitors, have the advantages of higher energy density, power density and long cycle life compared with traditional batteries. More and more attention. The core of the development of ECs technology is to prepare high-performance electrode materials. Among them, nano-carbon materials are the most widely studied and applied, because they have the advantages of large specific surface area, hierarchical pore structure, good chemical stability and perfect preparation process. However, as the discharge current of ECs increases, the specific capacitance of nano-carbon materials decreases significantly, because the small-sized pores are not conducive to the transmission of electrolyte [Vix Guterl,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24
CPCY02E60/13
Inventor 张佳楠王首培王凯熙许群张祥兰尚佩
Owner ZHENGZHOU UNIV
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