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Preparing method of porous carbon electrode of super capacitor with high magnified charge-discharge performance

A supercapacitor, charge and discharge performance technology, applied in the field of porous carbon electrode preparation, to achieve the effect of good high rate charge and discharge characteristics

Active Publication Date: 2008-10-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many application fields that require ultra-fast charging and discharging, it is required to be able to charge and discharge quickly with an instantaneous super-high current. In many cases, the existing activated carbon materials are still difficult to meet this requirement.

Method used

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  • Preparing method of porous carbon electrode of super capacitor with high magnified charge-discharge performance
  • Preparing method of porous carbon electrode of super capacitor with high magnified charge-discharge performance
  • Preparing method of porous carbon electrode of super capacitor with high magnified charge-discharge performance

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Experimental program
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Effect test

Embodiment 1

[0017] Add 100mg Y-type zeolite molecular sieve template into the quartz reactor, and pass 99.999% nitrogen at a flow rate of 125ml / min. Use a high-frequency heating device to heat up to 800°C at a heating rate of 100°C / min, and then pass it in at a flow rate of 25ml / min 99.999% high-purity methane gas, constant temperature for 1 hour for chemical vapor deposition, stop feeding methane gas, continue to feed 99.999% nitrogen at a flow rate of 125ml / min, and heat up to 1100°C at a heating rate of 50°C / min, constant temperature 3 After hours, the temperature was lowered to room temperature at 5°C / min. After the resulting product was acid washed with HF to remove the template, a regular porous carbon was obtained.

[0018] Put the porous carbon into a tube furnace heated by resistance wire for high-temperature heat treatment. Under the protection of nitrogen, the temperature is increased from room temperature to 1600°C at a rate of 5°C / min, and then kept at this temperature for 5 hour...

Embodiment 2

[0021] Add 200mg of the template material β-zeolite molecular sieve into the quartz reactor, inject 99.999% nitrogen at a flow rate of 300ml / min, use a high-frequency heating device to heat up to 650°C at a heating rate of 50°C / min, and then at a flow rate of 50ml / min Pass in 99.99% high-purity acetylene gas, perform chemical vapor deposition at a constant temperature for 2 hours, stop passing acetylene gas, continue to pass in 99.999% nitrogen at a flow rate of 125ml / min, and heat up to 1000°C at a heating rate of 50°C / min. After being kept at a constant temperature for 3 hours, the temperature is reduced to room temperature at 5°C / min. After the resulting product is acid washed with HF to remove the template, a regular porous carbon is obtained.

[0022] Add this porous carbon to a tube furnace heated by resistance wire for high-temperature heat treatment. Under the protection of nitrogen, it is heated from room temperature to a final temperature of 1000°C at a rate of 5°C / min, ...

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Abstract

The invention discloses a method for preparing a porous carbon electrode of a super capacitor with high-rate charge-discharge performance. The method comprises the following steps that: a microporous zeolite molecular sieve is taken as a template, gaseous acetylene, methane or ethylene is taken as a carbon source, and a radiofrequency heating device is used to carry out vapor deposition to obtain porous carbon rich in micropores in a quartz tube reactor; the porous carbon undergoes high-temperature heat treatment at the temperature of between 1000 and 1600 DEG C to adjust surface nature to produce porous carbon with large specific surface area; and the porous carbon with large specific surface area and polyfluortetraethylene are mixedly dispersed into alcohol, prepared into paste, and evenly coated on a foamed nickel sheet, and the foamed nickel sheet is dried and pressed to prepare the porous carbon electrode. The method has the advantages that: the prepared carbon with large specific surface area has a homogeneous pore structure; the porous carbon has low surface hydrophilicity and low oxygen content, so the prepared porous carbon electrode is particularly suitable for the super capacitor with the high-rate charge-discharge performance.

Description

Technical field [0001] The invention relates to a method for preparing porous carbon electrodes of supercapacitors with high-rate charge and discharge performance, and belongs to the preparation and modification technology of supercapacitor carbon electrodes. Background technique [0002] Supercapacitor is a new type of energy storage device developed at the end of the 20th century with performance between traditional capacitors and batteries. It has high power density, long cycle life, instantaneous large current and rapid charge and discharge, wide operating temperature range, safety and no The characteristics of pollution, etc., have broad application prospects in the fields of electric vehicles, memory, microcomputers, and aerospace. [0003] Porous carbon material is the core material of carbon-based supercapacitors. Its energy storage mechanism is that the charge is stored in the electric double layer formed between the electrode and the electrolyte interface, and it relies...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M4/38C01B31/02
CPCY02E60/13Y02E60/10
Inventor 杨全红苏珍
Owner TIANJIN UNIV
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