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Production method of multi-element transition metal hydroxide nuclear shell composite carbon filter electrode material

A composite carbon fiber and hydroxide technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of electrochemical efficiency limitation, capacitance degradation, poor quality, large volume change, etc., and achieve easy implementation and energy saving. Excellent electrochemical performance and good electrical conductivity

Inactive Publication Date: 2016-05-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, transition metal oxides or hydroxides have limited their applications due to their low electrical conductivity, large volume change, rapid capacitance decay, and poor electrochemical efficiency in long-term redox.

Method used

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  • Production method of multi-element transition metal hydroxide nuclear shell composite carbon filter electrode material
  • Production method of multi-element transition metal hydroxide nuclear shell composite carbon filter electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Preparation of polymer nanofibers: Dissolve PAN in DMF and prepare a 10wt% polymer solution. After it is completely dissolved, inject it into the spinning needle tube to set the spinning voltage at 20KV, and spin at a receiving distance of 15cm to obtain The nanofibers were dried in a vacuum oven for 24 hours;

[0021] 2) Preparation of surface-functionalized carbon nanofibers: the obtained polymer fibers were placed in a vacuum tube furnace, pre-oxidized in an air atmosphere at 280°C for 2 hours, and then heated to 1000°C in a nitrogen atmosphere for high-temperature carbonization for 1 hour, and the obtained carbon nanofibers The fiber was treated with a mixed solution of sulfuric acid and nitric acid (molar ratio 1:1) for 30 minutes;

[0022] 3) In-situ catalytic growth of multi-element metal hydroxides: Cut the carbon nanofibers obtained in the above steps to 2cm*2cm and soak them in 20ml of absolute ethanol solution, add 2g of zinc nitrate / The cobalt nitrate m...

Embodiment 2

[0024] 1) Preparation of polymer nanofibers: Dissolve PAN in DMF and prepare a 15wt% polymer solution. After it is completely dissolved, inject it into the spinning needle tube to set the spinning voltage at 15KV, and spin at a receiving distance of 15cm to obtain The nanofibers were dried in a vacuum oven for 24 hours;

[0025] 2) Preparation of surface-functionalized carbon nanofibers: the obtained polymer fibers were placed in a vacuum tube furnace, pre-oxidized in an air atmosphere at 280°C for 2 hours, and then heated to 1000°C in a nitrogen atmosphere for high-temperature carbonization for 1 hour, and the obtained carbon nanofibers The fiber was treated with a mixed solution of sulfuric acid and nitric acid (molar ratio 1:1) for 30 minutes;

[0026] 3) In-situ catalytic growth of multi-element metal hydroxides: Cut the carbon nanofibers obtained in the above steps into 2cm*2cm and soak them in 20ml of absolute ethanol solution, add 2g of zinc nitrate / The cobalt nitrate...

Embodiment 3

[0028] 1) Preparation of polymer nanofibers: Dissolve PAN in DMF and prepare a 15wt% polymer solution. After it is completely dissolved, inject it into the spinning needle tube to set the spinning voltage at 20KV, and spin at a receiving distance of 20cm. The obtained The nanofibers were dried in a vacuum oven for 24 hours;

[0029] 2) Preparation of surface-functionalized carbon nanofibers: the obtained polymer fibers were placed in a vacuum tube furnace, pre-oxidized in an air atmosphere at 280°C for 2 hours, and then heated to 1000°C in a nitrogen atmosphere for high-temperature carbonization for 1 hour, and the obtained carbon nanofibers The fiber was treated with a mixed solution of sulfuric acid and nitric acid (molar ratio 1:1) for 30 minutes;

[0030] 3) In-situ catalytic growth of multi-element metal hydroxides: Cut the carbon nanofibers obtained in the above steps to 2cm*2cm and soak them in 20ml of absolute ethanol solution, add 2g of zinc nitrate / The cobalt nitra...

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Abstract

The invention discloses a production method of a multi-element transition metal hydroxide nuclear shell composite carbon filter electrode material, and belongs to the electrode material production field. Nano-fibers can be produced by adopting the electrospinning method, and carbon fibers can be produced by adopting the high temperature carbonization method, and in addition, the surface functionalization can be realized by adopting the acid treatment, and the surface can be provided with the multi-element transition metal ions in a complexed manner, and then the in-situ growth transition metal hydroxide can be realized by adopting the base catalysis. The electrode material is advantageous in that the specific surface area of the nano-fiber film is large, and the porosity is high, and at the same time, the excellent electrochemistry performance is provided by combining with the high conductivity of the carbon fiber materials and the high capacitance of the multi-element metal hydroxide, and the important application value can be provided for the fields such as the lithium ion battery, the super capacitor, and other electronic devices.

Description

technical field [0001] The invention relates to a preparation method of a multi-component transition metal hydroxide core-shell composite carbon fiber electrode material, which belongs to the field of electrode material preparation. Background technique [0002] With the depletion of fossil energy and the intensification of environmental pollution, people pay more and more attention to the invention and utilization of environmentally friendly and efficient energy storage devices. Advanced energy storage and conversion systems have been developed, such as: lithium-ion batteries, supercapacitors, solar cells, fuel cells. Among them, supercapacitor has become one of the main energy supply devices due to its high energy density, fast charge and discharge rate, long cycle life and environmental friendliness. [0003] Electric-layer capacitors are based on the adsorption and desorption of ions on the electrode surface, resulting in low capacitance and energy density, while pseudo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/46H01G11/86
CPCY02E60/13H01G11/26H01G11/46H01G11/86
Inventor 马贵平郭军霞聂俊牛其建
Owner BEIJING UNIV OF CHEM TECH
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