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Supercapacitor electrode material, and preparation method and application thereof

A technology of supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of affecting the performance of capacitors, increasing the weight of working electrodes, and bulky capacitors, and achieves good electrochemical performance. Capacitance performance, the effect of excellent specific capacitance

Active Publication Date: 2019-05-31
NANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing the working electrode of the traditional supercapacitor, in addition to the transition metal hydroxide, it is also necessary to add a conductive agent and an adhesive, and the addition of the adhesive will cause an increase in internal resistance to inhibit electron transmission. Adding it will not only increase the weight of the working electrode, making the capacitor bulky and difficult to carry, but also will easily cause the conductive agent and adhesive to fall off with the long-term use of the supercapacitor, thus affecting the performance of the capacitor

Method used

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  • Supercapacitor electrode material, and preparation method and application thereof
  • Supercapacitor electrode material, and preparation method and application thereof
  • Supercapacitor electrode material, and preparation method and application thereof

Examples

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Embodiment 1

[0032] The preparation method of the present embodiment 1 metal hydroxide film material comprises the following steps:

[0033] Accurately weigh 1 mmol of NiCl 2 ·6H 2 O, add 25mL of water, put in a magnet and stir at room temperature for 10min, until the NiCl 2 ·6H 2 After O was completely dissolved, 9 mmol of triethanolamine was added dropwise, and after stirring for 20 min, the obtained mixture was transferred to a 50 mL stainless steel reactor for hydrothermal reaction. The hydrothermal temperature was 180 °C and the hydrothermal time was 12 h. After the reaction, it was taken out and cooled to room temperature, washed by centrifugation, and vacuum-dried at 60° C. for 12 hours to obtain a metal hydroxide thin film material.

Embodiment 2

[0035] The preparation method of the present embodiment 2 metal hydroxide film material comprises the following steps:

[0036] Accurately weigh 1 mmol of NiCl 2 ·6H 2 O, add 25mL of water, put in a magnet and stir at room temperature for 10min, until the NiCl 2 ·6H 2 After O was completely dissolved, 12 mmol triethanolamine was added dropwise, and after stirring for 20 min, the resulting mixture was transferred to a 50 mL stainless steel reactor for hydrothermal reaction. The hydrothermal temperature was 180 °C and the hydrothermal time was 12 h. After the reaction, it was taken out and cooled to room temperature, washed by centrifugation, and vacuum-dried at 60° C. for 12 hours to obtain a metal hydroxide thin film material.

Embodiment 3

[0038] The preparation method of the present embodiment 3 metal hydroxide film material, comprises the following steps:

[0039] Accurately weigh 1 mmol of NiCl 2 ·6H 2 O, add 25mL of water, put in a magnet and stir at room temperature for 10min, until the NiCl 2 ·6H 2 After O was completely dissolved, 9 mmol of triethanolamine was added dropwise, and after stirring for 20 min, the obtained mixture was transferred to a 50 mL stainless steel reactor for hydrothermal reaction. The hydrothermal temperature was 180 °C and the hydrothermal time was 8 h. After the reaction, it was taken out and cooled to room temperature, washed by centrifugation, and vacuum-dried at 60° C. for 12 hours to obtain a metal hydroxide thin film material.

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Abstract

The invention belongs to the field of nano materials and in particular to a supercapacitor electrode material, and a preparation method and application thereof. A preparation principle is that a coordination compound is generated by utilizing the coordination of triethanolamine and metal ions, wherein the triethanolamine has a certain alkalinity in an aqueous solution, can be electrolyzed to produce OH-, and the coordination compound and OH- react to produce the metal hydroxide hydrogel. The preparation method comprises the following steps of filtering, washing and drying the generated metalhydroxide hydrogel to obtain a metal hydroxide film; cutting the metal hydroxide film into a desired size; and sandwiching a metal foam current collector between two foamed nickel current collectors,laminating the three current collectors into one body at the pressure of 5 to 20MPa to form a working electrode for a supercapacitor. The invention provides a supercapacitor electrode material, and apreparation method and application thereof. The electrode material can realize the function of a conventional supercapacitor without a conductive agent and an adhesive.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, and relates to a supercapacitor electrode material, a preparation method and an application. Background technique [0002] A supercapacitor is an energy storage device between a battery and a capacitor. Due to the characteristics of high charge and discharge efficiency, high power density, long cycle life, and environmental friendliness, supercapacitors are widely used in transportation, mobile communications, information technology, aerospace and defense technology and other fields. [0003] Transition metal hydroxides are often selected as excellent capacitor materials due to their high specific capacitance and energy density. In the process of preparing the working electrode of the traditional supercapacitor, in addition to the transition metal hydroxide, it is also necessary to add a conductive agent and an adhesive, and the addition of the adhesive will cause...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/86
CPCY02E60/13
Inventor 田进军薛艳付卫云田腾飞余新平李翛
Owner NANYANG INST OF TECH
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