A supercapacitor electrode material and a preparation method thereof

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors. It can solve the problems of low conductivity, unfavorable electrolyte diffusion and electron transmission, etc., and achieve low cost, good capacitance performance and Effects of cycling stability, diffusion, and electrical performance improvement

Active Publication Date: 2019-01-11
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the conductivity of MOFs is generally low, which is not conducive to the diffusion of electrolyte and electron transport.

Method used

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  • A supercapacitor electrode material and a preparation method thereof
  • A supercapacitor electrode material and a preparation method thereof
  • A supercapacitor electrode material and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In 39-45mmol of p-aminobenzoic acid, add 60ml of aqueous solution containing 45-51mmol of NaOH and 20ml of dioxane solution containing 9mmol of cyanuric chloride under stirring conditions, and heat to reflux at 105°C for 10-12h. After naturally cooling to room temperature, filter with suction and wash the product with water. Then adjust the pH to 1 with HCl, and dry in vacuum at 80°C to obtain light yellow ligand H 3 TATAB. According to Co(COO) 2 .6H 2 O and H 3 The molar ratio of TATAB is 1:2 and put into the reaction kettle, add ethanol and N,N-dimethylformamide with a volume ratio of 1:1, and react at 120°C for 48h. The obtained product was suction filtered, washed with ethanol and dried in vacuum to obtain the purple electrode material Co-MOF-120. The electrochemical performance test of the material shows that the charge transfer resistance of the material is 0.584Ω, which has a small equivalent series resistance value. The cyclic voltammetry curve is rectangu...

Embodiment 2

[0033] The synthesis of the ligand is the same as in Example 1. According to Co(COO) 2 .6H 2 O and H 3 The molar ratio of TATAB is 1:2 and put into the reaction kettle, add ethanol and N,N-dimethylformamide with a volume ratio of 1:1, and react at 140°C for 48h. The obtained product was suction filtered, washed with ethanol and dried in vacuum to obtain the purple electrode material Co-MOF-140-1:2. The electrochemical performance test of the material shows that the material has a charge transfer resistance of 0.474Ω, a small equivalent series resistance value and excellent diffusion performance. Specific as Figure 1 to Figure 6 shown. Transmission electron microscope pictures as figure 1 As shown, it can be seen from the figure that the shape of the Co-MOF-140-1:2 material is a mixed structure of nano needles and rods, which can provide a large number of ion exchange channels and accelerate the entry of ions in the electrolyte into the electrode. N 2 The adsorption-de...

Embodiment 3

[0035] The synthesis of the ligand is the same as in Example 1. According to Co(COO) 2 .6H 2 O and H 3 The molar ratio of TATAB is 1:2 and put into the reaction kettle, add ethanol and N,N-dimethylformamide with a volume ratio of 1:1, and react at 160°C for 48h. The obtained product was suction filtered, washed with ethanol and dried in vacuum to obtain the purple electrode material Co-MOF-160. The electrochemical performance test of the material shows that the charge transfer resistance of the material is 0.645Ω, which has a small equivalent series resistance value. The cyclic voltammetry curve is rectangular, indicating that the charge storage is dominated by electric double layer capacitance. Calculated from the charge-discharge curve, when the current density is 0.5A·g -1 , the specific capacitance value of the material is 225.2F·g -1 , with excellent electrochemical performance.

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Abstract

A supercapacitor electrode material and preparation method thereof are related in the invention. The method includes adding and stirring an aqueous solution of NaOH and a dioxane solution of melaminechloride in p-aminobenzoic acid, heating and refluxing, naturally cooling to room temperature, pumping and filtering, washing with water, adjusting pH value, vacuum drying to obtain ligand, mixing cobalt acetate hexahydrate and ligand, putting the ligand into a reaction kettle, mixing ethanol and N, N-dimethylformamide as solvent, temperature-controlled reaction 36-60 hour, that obtained product is filter by suction, washed with ethanol and dried in vacuum to obtain the electrode material of the supercapacitor. As compare with that prior art, the mesoporous nano-structure Co with high nitrogencontent is prepared by the preparation method of the invention; MOFs are ideal electrode materials for supercapacitors because of their excellent capacitive properties and cyclic stability.

Description

technical field [0001] The invention belongs to the field of supercapacitors, in particular to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] Among energy storage devices such as batteries, fuel cells, and traditional capacitors, supercapacitors (also known as electrochemical capacitors) have attracted widespread attention in recent years because of their high power density, fast charging and discharging, and long life. Supercapacitors are the link between conventional capacitors and batteries. According to the energy storage mechanism, it can be divided into electrochemical double layer capacitor (EDLC) and pseudocapacitive capacitor. EDLC stores charges through electrostatic interaction, and the ions in the electrolyte are reversibly adsorbed to the surface of the electrode material, so that the interface between the electrode and the electrolyte forms an electric double layer, which is a physical behavior. Pseudocapac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 郭建宇邵丹妮张斯勇鲁彦
Owner SHANGHAI NORMAL UNIVERSITY
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