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Method for preparing electrode carbon material of supercapacitor employing radish as carbon source

A technology of supercapacitors and carbon materials, which is applied in the fields of hybrid capacitor electrodes, chemical instruments and methods, and hybrid/electric double layer capacitor manufacturing, etc. Demand and other issues, to achieve the effect of low equipment requirements and low prices

Inactive Publication Date: 2017-07-07
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw materials of the existing high-quality activated carbon are mainly wood and coal, which does not meet the needs of sustainable development in today's society, so the use of biomass to prepare activated carbon is a development trend
In recent years, many researchers have been researching the preparation of biomass activated carbon. Some use catkins to prepare carbon materials for supercapacitors, and corn bran to prepare carbon materials for supercapacitors, but the energy storage is low, and the produced Carbon materials have low specific surface area and poor energy storage effect

Method used

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  • Method for preparing electrode carbon material of supercapacitor employing radish as carbon source
  • Method for preparing electrode carbon material of supercapacitor employing radish as carbon source
  • Method for preparing electrode carbon material of supercapacitor employing radish as carbon source

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specific Embodiment approach 1

[0021] Specific embodiment one: this embodiment is a kind of method that uses radish as carbon source to prepare supercapacitor electrode carbon material, specifically carries out according to the following steps:

[0022] 1. Freeze-drying radish: put the radish pulp in a freeze-drying machine, and freeze-dry it for 24h-36h at a temperature of -25 to -70°C and a vacuum of 50Pa to 500Pa;

[0023] 2. Pre-carbonization: put the freeze-dried radish in step 1 in a tube furnace, and calcinate for 0.5h-3h under the protection of inert gas and at a temperature of 350°C to 600°C, and then put it in the furnace under the protection of inert gas. Cool to obtain pre-carbonized radish;

[0024] 3. Activation: Add the pre-carbonized radish in step 2 to the aqueous solution of the activator, mix thoroughly, and then heat in an oven at a temperature of 60°C to 110°C for 3h to 12h to obtain the activated product; the activator The solute in the aqueous solution is the mixture of one or more i...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that the radish pulp described in step 1 is carrot pulp or white radish pulp. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the inert gas described in step two is a mixture of one or more of nitrogen, helium or argon, and the flow rate of the inert gas is 10mL / min ~500mL / min. Others are the same as in the second embodiment.

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Abstract

The invention discloses a method for preparing an electrode carbon material of a supercapacitor employing radish as a carbon source, relates to a method for preparing an electrode carbon material of a supercapacitor and aims at solving the technical problems that an electrode carbon material of a supercapacitor prepared from biomass is relatively low in stored energy and the produced carbon material is relatively low in specific surface area at present. The method comprises the steps of (1) freezing of dry radish; (2) pre-carbonization; (3) activation; (4) calcinations; and (5) acid pickling. The method has the beneficial effects that the carbon source of the prepared electrode carbon material of the supercapacitor is radish, and is an activated carbon material prepared from biomass. The prepared electrode carbon material of the supercapacitor is high in specific surface area, is used as an electrode material of the supercapacitor, and is high in specific capacitance. The reaction temperature for preparing the electrode carbon material of the supercapacitor is 1,000 DEG C lower than that of industrially produced activated carbon, and the electrode carbon material is more energy-saving and emission-reducing, low in carbon, environment-friendly and lower in requirements on equipment.

Description

technical field [0001] The invention relates to a method for preparing a supercapacitor electrode carbon material. Background technique [0002] The development of human beings is based on the extensive use of natural resources, and every progress of human beings is accompanied by a large amount of energy consumption. After mankind entered the electrical age, the demand for fossil fuels has risen rapidly, and primary energy sources such as coal, oil, and natural gas are close to depletion. How to efficiently use energy and store energy effectively and reasonably is a hot spot in scientific research. Humans need to seek new types of high-efficiency energy storage materials. [0003] Supercapacitor is a new type of green energy storage device between traditional capacitors and batteries. It has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. Since no chemical reaction occurs during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/86H01G11/44
CPCC01P2002/80C01P2002/82C01P2004/03C01P2006/12C01P2006/40H01G11/44H01G11/86Y02E60/13Y02P20/10
Inventor 张艳红窦天威汪成邹金龙
Owner HEILONGJIANG UNIV
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