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A kind of preparation method of supercapacitor electrode material

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., can solve problems such as low energy density, poor cycle performance and power density, and achieve excellent rate performance, easy large-scale application, simple and effective methods

Inactive Publication Date: 2017-01-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although carbon materials have good cycle performance, they have low energy density.
Metal organics and conductive polymers have higher energy density, but poor cycle performance and power density.

Method used

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  • A kind of preparation method of supercapacitor electrode material
  • A kind of preparation method of supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;

[0019] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;

[0020] 3) Add the solution described in step 2) dropwise to the solution described in step 1);

[0021] 4) Put the solution described in step 3) into the reactor, and react at 120°C for 12 hours;

[0022] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;

[0023] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.

[0024] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1127 F g -1 , after 3000 cycles, the capacity retention rate is 91%.

Embodiment 2

[0026] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;

[0027] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;

[0028] 3) Add the solution described in step 2) dropwise to the solution described in step 1);

[0029] 4) Put the solution described in step 3) into the reactor, and react at 100°C for 24 hours;

[0030] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;

[0031] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.

[0032] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1125 F g -1 , after 3000 cycles, the capacity retention rate is 90%.

Embodiment 3

[0034] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;

[0035] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;

[0036] 3) Add the solution described in step 2) to the solution described in step 1 dropwise;

[0037] 4) Put the solution described in step 3) into the reactor, and react at 130°C for 4 hours;

[0038] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;

[0039] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.

[0040] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1126 F g -1 , after 3000 cycles, the capacity retention rate is 90.3%.

[0041] figure 1 The charge-discharge curves of Ni-MOF electrodes at different current densities. From figure 1 It can be calculated that the Ni-MOF electrode is at 0.5 A·g -1 , the specific capacity...

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Abstract

The invention provides a preparation method of a super-capacitor electrode material. The method is characterized in that a nickel-base metal organic framework material is synthesized by a simple hydrothermal method, and the nickel-base metal organic framework material is firstly applied to a super-capacitor. The super-capacitor electrode material is successfully synthesized by controlling the process parameters such as concentration of a reactant, mixing way of solution, reaction time and reaction temperature, and the super-capacitor electrode material has excellent characteristics such as high capacity, high power, long cycling life and the like.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and in particular relates to a preparation method of supercapacitor electrode materials. Background technique [0002] Since American scientist Becker obtained the first double-layer capacitor patent in 1957, supercapacitors have been widely studied for their high power density, fast charge and discharge capabilities, stable cycle life, and environmental protection. Supercapacitors can be divided into two categories according to their energy storage mechanism, electric double layer capacitance and pseudocapacitance. The former is produced by the confrontation of charges caused by the directional arrangement of electrons or ions at the electrode solution interface, and the latter is produced by the electrode surface or pseudocapacitance. In the two-dimensional or quasi-two-dimensional space in the bulk phase, the electroactive material undergoes underpotential deposition, and a high degree of chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/48
CPCY02E60/13
Inventor 魏明灯杨杰
Owner FUZHOU UNIV
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