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A method for preparing electrode materials for supercapacitors using current collectors as templates

A technology for preparing electrodes for supercapacitors, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc. It can solve the problems of affecting the electrochemical performance of the battery, reducing the specific capacity of the battery, increasing the quality of the electrode sheet, etc., to reduce the diffusion resistance , Reduce interface resistance, shorten the effect of diffusion distance

Active Publication Date: 2021-09-21
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the assembly process, binders and conductive agents need to be used, so the use of binders and conductive agents increases the quality of the electrode sheet, which will reduce the specific capacity of the entire battery
And using a binder to bind the electrode material and the current collector together will increase the interface resistance of the two and affect the electrochemical performance of the battery.

Method used

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  • A method for preparing electrode materials for supercapacitors using current collectors as templates
  • A method for preparing electrode materials for supercapacitors using current collectors as templates

Examples

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preparation example Construction

[0028] 4) Preparation of electrode material: After activation, the current collector with electrode material is compacted with a roller press, cut into pieces, and assembled into a battery. 6mol / L KOH solution is used as the electrolyte, and a button-type super is assembled after sealing. Capacitor, the electrochemical performance test was carried out after standing for 12h.

[0029] In the above step 1), the weight ratio of the metal oxide to the current collector is 1-20:100, and the metal oxide includes copper oxide, calcium oxide, zinc oxide, manganese dioxide, aluminum oxide, and iron tetroxide. , one or more of ferric oxide.

[0030] The particle size of the powdery metal oxide in the above step 1) is 10-50 nm.

[0031] The reaction time of the low-temperature pre-deposition in the above step 2) is 2-10 h.

[0032] The flow rate of the gaseous carbon source in the above step 2) is 10 to 100 mL min -1 ;The carrier gas flow is 200~800mL·min -1 , the carrier gas is high...

Embodiment 1

[0038] Using foamed nickel as a template, powdered copper oxide is evenly dispersed on the surface of foamed nickel, and the weight ratio of foamed nickel and powdered copper oxide is 100:10. The carrier gas is high-purity nitrogen, and the carrier gas flow rate is 500mL·min -1, carbon source acetylene gas flow 10mL / min, temperature 400 ℃, low temperature pre-deposition, deposition time 3h. Then carry out chemical vapor deposition, adjust the flow rate of the carrier gas to 800mL / min, adjust the flow rate of the acetylene carbon source to 50mL / min, adjust the chemical vapor deposition furnace, with a heating rate of 5°C / min to a reaction temperature of 800°C, a deposition time of 60min, and the reaction After the end, the current collector on which the carbon material is deposited is taken out. The current collector containing the in-situ deposited carbon material was placed on a white steel mesh, moved into an activation furnace, and heated to 600 °C at a heating rate of 5 °...

Embodiment 2

[0040] Using foamed nickel as a template, powdered ferric ferric oxide is evenly dispersed on the surface of foamed nickel, and the weight ratio of foamed nickel to powdered ferric ferric oxide is 100:5, and is placed at the end of the quartz tube of the chemical vapor deposition furnace. The quartz boat containing 50g of coal tar samples was put into the front end of the quartz tube, and the carrier gas high-purity argon was first introduced for pre-deposition, and the carrier gas flow was 600mL·min -1 , the temperature is 300 ℃, the sample is placed in the heating zone, and the low temperature pre-deposition is carried out, and the deposition time is 4h. Then carry out chemical vapor deposition, adjust the carrier gas flow rate to 600mL / min, adjust the chemical vapor deposition furnace, with a heating rate of 5°C / min to a reaction temperature of 700°C, deposition time of 30min, and after the reaction is completed, a current collector of carbon material is deposited take out....

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Abstract

The invention discloses a method for preparing an electrode material for a supercapacitor using a current collector as a template. The electrode material is prepared by depositing a carbon material in situ by using a metal foam current collector as a template. First, the metal oxide is uniformly dispersed on the surface of the current collector by spray drying method. The selected current collector is metal foam, which itself has a large porous structure. During the activation process, the metal oxide undergoes redox reaction with the deposited carbon material at high temperature. , and further form pores on the surface of the carbon material, and the water vapor is further activated along the pores to form a large number of micropores, thereby obtaining a porous carbon material for supercapacitors. The present invention uses the current collector of metal foam as a template and deposits carbon on it. The carbon electrode material will have a three-dimensional porous structure with many large pores. Microporous channels are introduced into the carbon material with porous structure, so that the specific surface area and electrical conductivity of the electrode material are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and in particular relates to a method for preparing electrode materials for supercapacitors by using current collectors as templates. Background technique [0002] As a new type of energy storage element, supercapacitors can effectively fill the gap between traditional capacitors and batteries due to the advantages of long cycle life, good reversibility, and high energy density and power density. In view of its many performance advantages, supercapacitors can be widely used in the automotive industry, aerospace, information technology, electronics industry, defense technology and other fields, and are the core products of low-carbon economy. [0003] As an important part of supercapacitors, electrode materials determine the performance and production cost of supercapacitors to a large extent. Generally, coal, petroleum, wood, fruit shells, resins and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/32H01G11/26H01G11/28
CPCH01G11/26H01G11/28H01G11/32H01G11/86Y02E60/13
Inventor 郭明聪刘书林和凤祥屈滨孙刚张勇王守凯张功多
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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