Preparation method of 3D hierarchical-structure flexible carbon fabric-loaded MOF-LDH hybrid array supercapacitor electrode material

A technology of MOF-LDH and hierarchical structure, which is applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of expanding requirements for energy storage devices and supercapacitors cannot fully meet actual needs.

Inactive Publication Date: 2019-03-12
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the rapid development of wearable electronic devices, conventional supercapacitors can no longer fully meet the actual needs, and the requirements for energy storage devices have expanded.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: First, the cotton cloth was carbonized in a tube furnace at 800°C under the protection of nitrogen for 2 hours, and the obtained carbon cloth was tested for electrochemical performance. Using potassium hydroxide as the electrolyte, the measured specific capacity was 112 F / g, and the cycle was 2000 The secondary capacity retention rate is 98%.

Embodiment 2

[0009] Example 2: Put the mixed solution of carbon cloth, cobalt nitrate and urea into an autoclave, and conduct a hydrothermal reaction at 90° C. for 4 hours to obtain basic cobalt carbonate nanowire arrays. The measured specific capacitance is 1159F / g, and the capacity retention rate after 2000 cycles is 93%.

Embodiment 3

[0010] Example 3: Change the hydrothermal reaction time to 12 hours, put the mixture of carbon cloth, cobalt nitrate, and urea into the hydrothermal reaction kettle, 90°C, and grow on the carbon cloth, the mass increases but the shape becomes a sheet The basic cobalt carbonate nanosheets have a specific capacitance of 1072F / g and a capacity retention rate of 95% after 2000 cycles.

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PUM

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Abstract

The invention relates to a preparation method of a 3D hierarchical-structure flexible carbon fabric-loaded MOF-LDH hybrid array supercapacitor electrode material, in particular to a novel method for preparing the 3D hierarchical-structure flexible carbon fabric-loaded MOF-LDH hybrid array supercapacitor electrode material according to the steps of carbonizing cotton cloth to prepare a carbon fabric, performing hydrothermal reaction on cobalt nitrate and urea aqueous solution to prepare a nanowire array, preparing an MOF array by taking the nanowire array as a sacrifice template, performing ionexchange on the obtained product and performing etching. The method comprises the following steps of firstly, carbonizing the cotton cloth to prepare the carbon fabric, activating the carbon fabric,and carbonizing the cotton cloth to the carbon fabric at 700-900 DEG C; secondly, placing the obtained carbon fabric in a mixed solution of cobalt nitrate, urea and deionized water, performing hydrothermal reaction for 4-12 hours at 90-100 DEG C, taking out and cleaning the product, and drying the product; thirdly, placing the obtained product in the previous step in an aqueous solution of 2-methylimidazole for reaction for 1 hour at a normal temperature, and performing cleaning and drying; and finally, placing the obtained product in an ethanol solution of nickel nitrate for reaction for 1 hour, and performing cleaning and drying.

Description

technical field [0001] The invention relates to a preparation method of a 3D hierarchical structure flexible carbon cloth loaded MOF-LDH hybrid array supercapacitor electrode material, in particular to a method of carbonizing cotton cloth into carbon cloth, and using cobalt nitrate and urea aqueous solution to carry out hydrothermal reaction to prepare nanowires array and use nanowire array as a sacrificial template to prepare MOF array, and then perform ion exchange and etching on the obtained product to prepare a new method of 3D hierarchical structure flexible carbon cloth loaded MOF-LDH hybrid array supercapacitor electrode material. Background technique [0002] Renewable energy technologies are of great significance in solving the energy crisis and global environmental change. Among various electrochemical energy storage and conversion systems, supercapacitors have been extensively studied in recent years because of their multiple advantages such as high power, fast ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/44
CPCH01G11/30H01G11/44Y02E60/13
Inventor 王丽丽唐家俊秦皓高鑫沈燕妮
Owner TIANJIN POLYTECHNIC UNIV
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